für 11.40€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Dieses Buch behandelt in einer vorlesungsorientierten Darstellung die Nichtmetallchemie. An ein einführendes Kapitel zur Differenzierung zwischen Metallen und Nichtmetallen und ein Kapitel zum Element Wasserstoff schließt sich die Gliederung nach den Gruppen des Periodensystems an. Der Anfang wird mit den Edelgasen und ihren Verbindungen gemacht. Für eine kompakte Darstellung wurden Schwerpunkte gesetzt und eine Auswahl getroffen. Ein wichtiges Kriterium waren Anwendungen der Elemente und Verbindungen. Neben der Stoffchemie werden an geeigneten Stellen Theorien, Konzepte, Regeln vorgestellt. Im Rahmen der Stoffchemie sollen Trends und Querbeziehungen sichtbar gemacht werden. Das Buch setzt Kenntnisse in der Allgemeinen Chemie voraus. Atombau, Orbitalmodell, Aufbau des Periodensystems u.a. etwa werden hier nicht behandelt.Am Ende jedes Kapitels wird eine kurze Zusammenfassung gegeben, und es sind Fragen zur selbständigen Wissensüberprüfung formuliert. Beispiele für ausführlicher behandelte anwendungsbezogene Themengebiete sind: Wasserstoff als Energieträger, Chlorchemie, Ozon, Stickoxide, Organophosphor-Verbindungen, Treibhauseffekt, Silicone, Bor-Neutroneneinfang-Therapie. Die Umweltproblematik zu Chlor, Ozon, Schwefeldioxid, den Stickoxiden, Kohlenmonoxid und Kohlendioxid wird in breitem Rahmen angesprochen. Neben der Stoffchemie werden an geeigneten Stellen Theorien, Konzepte, Regeln vorgestellt. Beispiele für vorgestellte Konzepte sind: dreidimensionales Periodensystem, VSEPR-Modell, Molekülsymmetrie und Gruppentheorie, Molekülorbital-Theorie, isoelektronische Beziehungen, Wade-Regeln. Das Buch richtet sich an Studierende der Chemie vom 1. Semester bis zum Bachelor-Abschluss. Es vermittelt auf 272 Seiten ein solides (Prüfungs-)Wissen zur Nichtmetallchemie und ist zum Selbststudium geeignet. Das Erlernte kann anhand der Fragen am Ende jedes Kapitels überprüft werden. ····· 10361107578
····· lezzter Preis 19.90€ ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Jacques Danne, Privatassistent von Pierre Curie, fasst in diesem Buch die Darstellung und Eigenschaften des Radiums zusammen. Nachdruck des Originals von 1904. ····· ····· ····· 10361150632
····· lezzter Preis 19.95€ ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Spielerisch Chemie lernen mit Cartoons! Alle, die für Abitur, Uni oder Berufsweiterbildungen anorganische Chemie verstehen wollen (müssen) finden hier einen idealen Einstieg. Dieses Buch lässt Begeisterung für die Chemie aufkommen. Die macchiato-Reihe steht mit über 100.000 verkauften Exemplaren für ein erfolgreiches pädagogisches Konzept, mit Cartoons und Humor wertvolle Einsichten und Aha-Momente auszulösen. Dadurch wird aus frustrierendem Büffeln ein Lernen mit Verständnis und Spaß. Anorganische Chemie macchiato präsentiert auf ungewöhnliche Weise den grundlegenden Lehrstoff der allgemeinen und anorganischen Chemie. Analogien aus dem täglichen Leben und Cartoons bieten einen verständlichen Zugang in die abstrakte Welt der Chemie. In Übungen kann sich der Leser vergewissern, ob das Gelernte auch verstanden wurde. ····· 10361185104
····· lezzter Preis 26.10€ ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray En la industria farmacéutica se emplean diferentes minerales como principios activos o excipientes en las formulaciones. A partir de diversos minerales es posible también sintetizar sales químicas que cumplan las especificaciones establecidas en esta exigente industria. En el presente trabajo se ofrecen los principales minerales que pueden o son empleados en la actualidad, así como sus principales características. Entre ellos se encuentran el carbonato de calcio, magnesita, kaolín, bentonita, dolomita y zeolita. De todos ellos existen yacimientos en el país y no siempre son empleados con estos fines. En la actualidad se realizan estudios con vistas a aumentar el espectro de utilización de los mismos y proponer nuevas aplicaciones, así como ampliar el número de minerales a emplear, entre los que se encuentran la sheridanita y el vidrio volcánico, de los cuales también se explotan yacimientos con otros fines. Los resultados obtenidos manifiestan la factibilidad de obtención de sales químicas de uso farmacéutico a partir de diversos minerales y la posibilidad de su empleo en distintas formulaciones farmacéuticas, utilizando procesos de síntesis o purificación. ····· 1036122829
····· lezzter Preis 26.27€ ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray In der heutigen Zeit kommen in vielen Bereichen vermehrt nanoskalige Leuchtstoffe zum Einsatz, wenn diese mit herkömmlichen Bulkleuchtstoffen nicht zugänglich sind. Um jedoch technisch relevant zu sein, müssen Nanoleuchtstoffe auch durch Anregungs- und Emissionsspektren charakterisiert werden, eine geeignete Materialstabilität aufweisen und reproduzierbar synthetisiert werden können. Darüber hinaus sollten sie mit einer hohen Quantenausbeute das technische Gütekriterium für Leuchtstoffe erfüllen. Bei der Herstellung von Nanopartikeln ergeben sich folglich besondere Herausforderungen. Es müssen Synthesestrategien entwickelt werden, die einerseits die Kontrolle der Partikelgröße zulassen und bei geeigneter Temperatur betrieben werden können, die andererseits aber auch Defekte und Oberflächenterminierungen minimieren. In der vorliegenden Arbeit werden für die Leuchtstoffe Zn2SiO4:Mn, CaWO4 und ZnWO4 geeignete Synthesestrategien entworfen. Dies beinhaltet Synthesen in inversen Mikroemulsionen sowie Verfahren, die mikrowellenunterstützt in Ionischen Flüssigkeiten durchgeführt werden. Die Leuchtstoffe werden mittels Pulverdiffraktometrie, IR- und UV-Vis-Spektroskopie, Rasterelektronenmikroskopie und Dynamischer Lichtstreuung charakterisiert. Darüber hinaus werden ihre Lumineszenzeigenschaften fluoreszenzspektroskopisch untersucht und die Quantenausbeuten ermittelt. Hierzu wird ein neuartiges Messverfahren entwickelt, das auf der Verwendung eines kommerziellen Fluoreszenzspektrometers und einer Integrationskugel beruht, und das es erlaubt, die Quantenausbeute sowohl von Pulvern als auch von Flüssigkeiten und Suspensionen zu bestimmen. Außerdem wird der Einfluss von Dotierungen auf die Lumineszenzeigenschaften sowie ein möglicher Energietransfer untersucht. Zusätzlich zu den nanoskaligen Leuchtstoffen wird aufgrund des großen Interesses an magnetischen Metallnanopartikeln das Verhalten von metallhaltigen Ionischen Flüssigkeiten gegenüber verschiedenen Reduktionsmitteln untersucht. Das Ziel ist eine gute Größenkontrolle und Stabilisierung der Partikel sowie deren Charakterisierung. ····· 10361192933
····· lezzter Preis 26.60€ ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Zusammenfassung unter Einbindung möglichst vieler Stichworte: Domino-Reaktionen, bei denen zwei oder mehr Transformationen nacheinander ablaufen, in denen unter Bindungsknüpfung oder Fragmentierung die jeweils nachfolgende Reaktion an den im vorhergehenden Schritt gebildeten Funktionalitäten erfolgt, stellen einen wichtigen Teil der modernen organischen Synthesechemie dar. Wo bisher in mehreren Schritten, Bindung für Bindung, ein System aufgebaut wurde, laufen in einer Domino-Reaktion direkt, ohne Isolation der Zwischenprodukte, mehrere Reaktionen hintereinander ab, welche dann zu der gewünschten Zielverbindung führen. Im Rahmen dieser Arbeit wurde die Anwendung einer Domino-Tsuji-Trost-Heck-Reaktion zur Bildung von dem Tetracyclin sehr ähnlichen Tetracyclen untersucht. Im ersten Schritt erfolgt die Bindungsknüpfung durch eine Tsuji-Trost-Reaktion zwischen einem 1,3-Diketon und einem Allylacetat, woraufhin im zweiten Schritt die dabei entstandene Doppelbindung mit dem bereits im Molekül vorhandenen Halogen in einer Heck-Reaktion zum gewünschten Vierringsystem weiterreagiert. ····· 10361158237
····· lezzter Preis 28.36€ ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Novel functionalized rare earth metal clusters and polymers have been prepared, characterized and investigated with respect to various potential applications. The literature known tetra- and pentanuclear rare earth metal hydroxy clusters [Ln4( 3-OH)2(Ph2acac)10] (Ln = Pr, Nd, Sm) and [Ln5( 4-OH)( 3-OH)4(Ph2acac)10] (Ln = Y, Eu) were embedded into different polymer matrices applying the miniemulsion polymerization technique to give cluster-polymer hybrid nanocompounds with narrow size distributions. The polymer matrices involved were composed of polystyrene (PS), poly(methyl methacrylate) (PMMA), poly(lauryl methacrylate) (PLMA) and poly(butyl acrylate-co-methyl methacrylate) (PBA-co-MMA). As a consequence of encapsulation, aqueous dispersions containing the hydrophobic clusters with more than 1000 mg¿L-1 could be prepared. Subsequent optical investigations revealed the retention of the encapsulated clusters` photophysical properties in aqueous dispersions. Additionally, a very efficient energy transfer from the ligand and polymeric unit to the Eu3+-ions was observed.Envisioning a functionalization of these pure Ph2acac clusters, the pentanuclear mixed ligated rare earth metal hydroxy clusters [Ln5( 4-OH)( 3-OH)4( AA)4(Ph2acac)6] (1-6) (Ln = Y: AA = D-PhGly (1), L-Pro (2), L-Val (3), L-Trp (4), Ph2Gly (5) Ln = Dy: AA = D-PhGly (6)) were reproducibly prepared in gram scale and the corresponding solid state structures were established via single crystal X-ray analysis. Clusters 1-6 display a square pyramidal {Ln5( 4-OH)( 3-OH)4}10+ scaffold, which is coordinatively and electronically saturated by six chelating Ph2acac ligands and four amino acid ligands acting as bridging chelates. The hydrodynamic radius rH of valine cluster 3 was determined via NMR-based PGSE diffusion experiments, revealing the retention of the cluster`s scaffold upon dissolution. Furthermore, 2D NMR experiments with 3 showed a heteronuclear cross coupling between 89Y and 1H nuclei. Applying similar reaction conditions as for 1-6, mixed ligated pentadecanuclear clusters accommodating the bifunctionalized peptoid ligand PepCO2 of formula [Ln15( 3-OH)20(PepCO2)10(Ph2acac)10 Cl]Cl4 (Ln = Y (7), Tb (8), Dy (9)) were obtained in gram scale. ESI-MS experiments in methanol have shown that the hydroxy bridges in clusters 7-9 undergo a methanolysis. The hydrodynamic radius rH of the diamagnetic cluster 7 determined via PGSE NMR diffusion experiments agrees very well with the value deduced from the X-ray data. The 1H,89Y gHMQC spectrum of 7 has confirmed the presence of two chemically distinguishable yttrium atoms. Magnetism and susceptibility measurements of dysprosium cluster 9 have revealed a behaviour which is typical for single-molecule-magnets (SMM). Terbium cluster 8 shows emission of orange luminescence at a wavelength of 613 nm. In vitro investigations were performed by incubating HeLa tumor cells with 7-9, showing an internalization of the clusters and subsequent enrichment in either the endoplasmatic reticulum (7 and 9) or the cytosol and the nucleus (8). Reaction of [LnCl3¿(H2O)6] (Ln = Y, Nd, Dy) with -ketoester ethyl acetylacetate (acacOEtH) under basic conditions yielded the nonanuclear rare earth metal hydroxy clusters [Ln9( 4-O)( 4-OH)( 3-OH)8(acacOEt)16] (Ln = Y (10), Nd (11), Dy (12)). The conversion of [NdCl3¿(H2O)6] with four equivalents of Ph2acacH and KOtBu each gave a onedimensional coordination polymer of formula [K(CH2Cl2)2{Nd(Ph2acac)4]n (13), whereas analogous reactions using [PrCl3¿(H2O)7] and [SmCl3¿(H2O)6] afforded the literature known tetranuclear clusters [Ln4( 3-OH)2(Ph2acac)10] (Ln = Pr, Sm). Analogous onedimensional coordination polymers [Cs{Ln(Ph2acac)4(C3H7NO)2]n (Ln = Pr (14), Nd (15), Sm (16), Dy (17)) were obtained using Cs2CO3 as base. The Ph2acac ligands of the isostructural compounds 14-17 serve to link the metal atoms by chelating and bridging in : 2: 2-mode. Since the ESI-MS spectra of 13-17 in DMF contain signal sets of several ionic species, complex equilibria in solution are suggested. Additionally, ultra-short-time dynamics in solution were investigated via femtosecond laser spectroscopy. The results allow an assignment of rare earth metal atom specific relaxation processes which arise from the lifetimes of their individual excited states. ····· 10361192947
für 31.90€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray C. Rüsts Anleitung zur Darstellung anorganischer Präparate ist das Ergebnis langjähriger Laboratoriumserfahrung. Er stellt eine Reihe gut erprobter und sorgfältig ausgearbeiteter Präparate vor, mit Hilfe derer Schülern der Bereich der anorganischen Chemie näher gebracht und verständlich gemacht werden kann. Sorgfältig bearbeiteter Nachdruck der Originalausgabe von 1903. ····· 10361139264
für 32.90€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Jaques Danne, Assistent von Pierre Curie, erläutert im vorliegenden Band charakteristische Eigenschaften des Radiums und seiner Salze, seine Effekte und seine Strahlung. Darüber hinaus skizziert er die möglichen Anwendungsgebiete der Radiumsalze. Illustriert mit zahlreichen Abbildungen. Nachdruck der Originalausgabe aus dem Jahr 1904. ····· 10361138520
····· lezzter Preis 34.90€ ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Herzfeld und Korn fassen in diesem Buch die Seltenen Erden zusammen, ihre Vorkommen auf der Erde, ihre Eigenschaften, ihre Förderung und Weiterverarbeitung. Nachdruck der Originalausgabe aus dem Jahr 1901. ····· 10361150614
····· lezzter Preis 34.95€ ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Spielerisch Chemie lernen mit Cartoons! Alle, die für Abitur, Uni oder Berufsweiterbildungen Chemie verstehen wollen (müssen) finden hier einen idealen Einstieg. Die Bücher lassen Begeisterung für die Chemie aufkommen. Die macchiato-Reihe steht mit über 100.000 verkauften Exemplaren für ein erfolgreiches pädagogisches Konzept, mit Cartoons und Humor wertvolle Einsichten und Aha-Momente auszulösen. Dadurch wird aus frustrierendem Büffeln ein Lernen mit Verständnis und Spaß. Chemie macchiato präsentiert auf ungewöhnliche Weise den grundlegenden Lehrstoff der Chemie. Chemische Alltagsphänomene werden aufgegriffen und mit theoretischem Wissen verknüpft. Dies erleichtert den Zugang zur Theorie und lässt das Gelernte anwenden. Analogien, Cartoons und Mind maps ermöglichen das Verstehen komplexer chemischer Zusammenhänge. In Übungen kann sich der Leser vergewissern, ob das Gelernte auch verstanden wurde. ····· 10361185106
für 35.91€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Summarizes the preparation and structure characterization of various thiosemicarbazones attached Quinoline aldehyde as well as their metal complexes. Synthesized ligands and metal complexes were characterized by different technique like mass, IR, 1H NMR, 13C NMR, UV-Visible spectroscopy as well as elemental analysis. In the elemental analysis of the synthesized compound both calculated and found percentages of elements are matched so elemental analysis confirms the structure of the thiosemicarbazone. Mass spectral data confirm the structure of the ligand as indicated by the molecular ion peak (M+) corresponding to their molecular weight. In IR spectra of the synthesized thiosemicarbazone showed useful information about the structure of the compound. In the IR spectra, some significant stretching bands due to -N-H, -N-N-, -NH2 and -C=S were observed at specific frequencies. In the 1H NMR spectra, the signal due to -CH=N-, -N-NH, NH2 and aromatic protons were observed in the expected regions. The 13C NMR spectrum provides direct information about the carbon skeleton of the synthesized compound. ····· 10361115049
für 35.91€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Vitamins are essentially required by the human body for its various biochemical and physiological processes. Ascorbic acid (vitamin C) is a water-soluble vitamin which is found in many biological systems and foodstuffs (fresh vegetables and fruits). The easiest and best way to take vitamin C is through liquid diet. Now a day`s many liquid juices are available in market claiming high levels of vitamin C content. The book is about ascorbic acid (vitamin C) content in juices, beverages, powdered samples, soft drinks marketed in Islamabad -Pakistan. Results were compared with labeled values quoted on the packs. Method of ascorbic acid by Polarograph has been described in detail. ····· 1036121503
····· lezzter Preis 38.00€ ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Im Rahmen dieser Arbeit wurden, basierend auf 1,2-Diaminocyclohexan sowie 1,2- Diphenylethylendiamin, verschiedene neue P,N-Liganden synthetisiert. Dazu wurden diese chiralen Diamine erst an den Stickstoffatomen aryliert oder alkyliert und mit Phosphortrichlorid sowie mit Oxazolinalkohol 15 zu den entsprechenden Liganden umgesetzt. Nach anschliessender Reaktion mit (Ir(COD)Cl)2 und NaBArF konnten dieentsprechenden Katalysatoren 32 bis 38 erhalten werden. ····· 10361158164
····· lezzter Preis 39.90€ ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Dieses Lehrbuch wendet sich hauptsächlich an Studierende mit Chemie im Nebenfach, im Besonderen an Studierende des Maschinenbaus. Zwei Aufgaben erfüllt das Buch: Es vermittelt die notwendigen chemischen Grundkenntnisse in Anorganischer Chemie und zeigt anwendungsbezogene, also fächerübergreifende Beispiele auf. Der Schwerpunkt liegt auf der anorganischen Chemie für Werkstoffe und Verfahren. ····· 10361164316
····· lezzter Preis 41.00€ ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Kalium-Natrium-Niobat (KNN) ist eine bleifreie ferroelektrische Keramik. Seine Herstellung ist aufgrund des hygroskopischen Verhaltens von Alkalikarbonat und Verdampfung bei hohen Temperaturen eine Herausforderung. Während des Herstellungsverfahrens wird die erwünschte Stöchiometrie schwanken. Undotierten und kupferdotierten KNN mit Alkali- oder Niobüberschüssen wurden hergestellt. Ihre Strukturbildung, Sinterverhalten, Mikrostrukturbildung und ihre elektrischen Eigenschaften werden untersucht. ····· 10361164557
für 41.90€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Metallographie in elementarer Darstellung ist eine Einführung in die Thematik für jeden an ihr Interessierten. Rudolf Ruer setzt lediglich vereinzelte Grundtatsachen der Experimentalphysik und chemie voraus, jedoch kein Expertenwissen. Wo nötig, offeriert Ruer Hintergrunderklärungen und gibt Einführungen in für das Thema wichtiges Wissen. Sorgfältig bearbeiteter Nachdruck der Originalausgabe von 1907. ····· 10361139262
für 42.90€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Die Chemiker Jacob Herzfeld und Otto Korn legen im vorliegenden Band eine umfangreiche Darstellung der seltenen Erden vor. Dabei gehen sie auf Vorkommen und chemische und physikalische Eigenschaften ein, beschreiben Methoden zur Gewinnung und Verarbeitung und skizzieren Anwendungsgebiete. Nachdruck der Originalausgabe aus dem Jahr 1901. ····· 10361138486
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The equilibrium constants for trivalent metal ions (Fe3+ and Cr3+) and divalent metal ions (Cu2+, Ni2+ and Co2+) with ligands gallic acid, L-norleucine and nicotinic acid were studied by using pH-potentiometric titration in aqueous solution at 25oC (I = 0.15M NaNO3). In order to determine the stability constant values, the protonation constants of free ligands were also determined. The complexation model for each system was established by the software program HYPERQUAD 2008 from potentiometric titration data. UV spectrophotometric measurement was carried out to confirm the complex that formed in each solution qualitatively. The phenomenon that occurred in each system was discussed. In terms of the nature of metal ion, the trend of stability constant is Cu2+Ni2+Co2+, which is in agreement with the Irving-William order of divalent metal ions. For trivalent metal ions, stability constant of Fe3+ is always higher than that of Cr3+. In terms of the ligand, the system that contains gallic acid as a ligand is more stable than the other systems that do not contain gallic acid. ····· 1036198757
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Solar light driven water oxidation photocatalyst Bi20TiO32 has been successfully synthesized through sol gel process. Photocatalytic activity of Bi20TiO32 for oxygen evolution using silver nitrate as sacrificial agent under UV light and visible light irradiation have also been studied and enhanced by the addition of co-catalyst iridium oxide and platinum to the photocatalyst. Furthermore, overall water splitting reaction using Bi20TiO32 in combination with CuFeO2 has also been conducted by conventional and modified Z-scheme process in both single and twin reactor. Photo-reduced graphene oxide and co-catalyst iridium oxide and ruthenium have been used to enhance photocatalytic activity water splitting. ····· 1036198822
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The first aim of this study is to evaluate the radiological impact of the oil refining process to obtain an extensive view to the radiological bidden of the petroleum industry in Egypt. The second aim is intended to set-up working guidelines for the workers in the companies and regulators with an understanding of occupational and environmental risks from TENORMs generated in oil refining facilities in Egypt beside the disposal of sludge without the treatment to environment. The last aim of the study is the recovery of the hydrocarbon content of the sludge using petroleum cuts and solves the problems of the disposal into environment The overall cost as well as time involved for recovery and the disposal of hydrocarbon residue has been decreased. Capillary gas chromatography was used to estimate the economic value and reuse of recovered oil. ····· 10361102629
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Firing of agricultural residues to produce heat energy leads to char production which is the firing residues. This char is a mixture of unburnt carbon, some metallic oxides and silicon dioxide. While the amount of silicon dioxide present in the char is dependent upon the type of the agricultural residue, the amount of unburnt carbon is determined by air availability and firing temperature. The char remained after firing agricultural residues can be used as a thermal insulation for steel works, constructive material for cement, ceramics,brick use and as a fertilizer for cultivated land use. Also it can be used after some treatment processes as a bonding agent and detergent use for reinforced plastic and rubber use as well as for medicine / food industry use. This research is conducted to utilize silica present in this char for preparing calcium silicate hydrate (CSH) which can be used as an adsorbent either alone or with the unburnt carbon present in the char to remove iron and manganese and other metallic ions from water. ····· 10361113339
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Shorttitle Humic Acid (HA) is an important constituent of soil organic matter which was the subject of several environmental studies. In this work the adsorption isotherms of Thorium(IV) and Uranium(VI) onto Azraq Humic acid (AZHA) were studied at different temperature and pH values. The results indicate that Thorium(IV) has higher adsorptivity than Uranium(VI). The increasing of pH resulted in higher adsorptivity of Actinides. In contrast to heavy metals and Lanthanides (entropy driven), the adsorption of Actinides on HA was found to be exothermic and so enthalpy driven. This leads to the hypothesis that Thorium(IV) and Uranium(IV) are encapsulated in the interior of HA helix with their water of hydration because the interior is full with water. However, heavy metals and Lanthanides are adsorbed on the exterior of HA helix. ····· 10361113940
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Steel quality depends on various factors, i.a. on the slag basicity and oxidation potential. These values can be determined by means of emf measurement using solid electrolyte based sensors. Liquid iron can serve as a cation electrode. Activity of ferrous oxide and manganese oxide can be found out. Ferrous oxide activity determines the oxidation potential and manganese oxide activity can be used for the basicity estimation. Sulphide and phosphate capacity can be calculated and distribution coefficients of oxygen, sulphur, manganese, and other elements can be predicted. Metallurgical wastes are classified as hazardous because of high content of heavy metals and their waste disposal is problematic. Their hydrometallurgical recycling is difficult due to poorly soluble zinc ferrite. Thermal treatment is expensive because of high energy consumption. A new method of acid leaching applying diluted acids was developed. Entire zinc from the ferritic wastes can be extracted. A solid residue is hematite. The present study should be useful for research workers dealing with thermodynamics of melts and waste treatment. ····· 10361114337
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Chemistry, the branch of science, deals nearly with every phase of our life. Nobody can deny its importance and applications in daily life. Chemistry is the practical subject, therefore, it is necessary that students must have a crystal clear understanding of practicals conducting in laboratories. Here an attempt has been adopted to train the young chemists to direct their approach towards the desired task easily.The book contains the basic first hand knowledge for undergraduate students. The book has been organized into three parts Introduction,qualitative analysis, Synthesis and Bio-chemical tests. ····· 10361115611
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The coordination chemistry of hydrazones is an intensive area of study and numerous transition metal complexes of these ligands have been investigated, which stemmed from the interest in the biological and pharmacological properties of these hydrazones. It is also known that mono and bis-hydrazones find wide applications in medicine as active physiological preparations, due to their antibacterial, tuberculostatic, fungicdal properties as well as activities against certain types of cancers and microorganisms. Further more benzothiazole and its derivatives constitute an important class of compounds having a wide spectrum of biological activity. ····· 10361115927
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Anglo Platinum currently stores some of its recovered osmium as the relatively stable potassium osmate salt and ruthenium in the form of ammonium hexachlororuthenate or an acidic ruthenium solution at its refinery plant. To date the development of the chemistry of these starting materials to provide useful inorganic and organometallic precursors has not been extensively reported. This is partly due to the relative cost of osmium starting materials and the inertness of most osmium complexes and also the toxicity of osmium tetroxide. Most known ruthenium compounds are usually made from ruthenium trichloride trihydrate.In the present project locally available refinery materials have been converted into a range of known osmium and ruthenium compounds including clusters together with the well known Grubbs` catalyst starting material as well as other useful complexes. The development of the synthesis of convenient osmium and ruthenium precursors as well as potential catalysts has been proven to be possible based on standard (literature) synthetic methods using the Anglo Platinum refinery material. Some procedures are new and some are modified literature procedures. ····· 10361116007
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Understanding of oxorhenium(V) Rhenium(V) complexes as radiopharmaceuticals for therapy and diagnosis have received attention, because of their suitable radionuclear properties, i.e., 186Re: Emax = 1.1 MeV for beta-emission and Emax = 0.137 MeV for gamma-emission with t1/2 = 90.6 h, 188Re: Emax = 2.1 MeV for beta-emission and Emax = 0.155 MeV for gamma-emission with t1/2 = 17 h. Hence, chemical properties of various monooxo- and dioxorhenium(V) (ReO3+ and ReO2+) complexes have been examined as basic studies for their application to radiopharmaceutical. However, only limited information is available concerning the electrochemical properties and stereoisomerism of oxorhenium(V) complexes in non-aqueous solutions, in spite of importance in the relation to in vivo behavior, i.e., the reactivity towards redox agents. This book is covering a doctoral study and its results on the related subjects. ····· 10361118100
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray New Paths in the World of Metallacarboranes provides an overview of the recent progress in the field of metallacarborane chemistry while also introducing the reader to four newly synthesized and distinctly unique 12-vertex compounds. The author emphasizes several of the techniques used in this sub-field of inorganic chemistry related to the synthesis, characterization, and analysis of caged metallacarboranes. The characterization data is conveniently recorded in four tables while a series of figures help the reader visualize complicated techniques and elaborate chemical structures. Although cursory in nature, the book provides a solid introduction and background to the field and methods of metallacarborane chemistry while specifically highlighting rhena- and nickelacarboranes. It is a book designed to aid those who are in the process of conducting chemistry research or for people who are just interested in gaining a deeper understanding of the chemistry that is not always taught in a classroom. ····· 10361132701
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Three new ligands have been prepared in this work, which were chosen to synthesis a new set of transition metal complexes [Cu (II), Ni (II), Hg (II), Cd (II) and Co (II)]. LI=(2-[5-phenyl-2-methylthio-1,3,4-oxadizole]-5-phenyl-1,3,4-oxadiazole), LII=2-(O-chloro benzylidine) hydrazine benzothiazole and LIII=2-(p-hydroxy benzylidine) hydrazine benzothiazole were prepared by Schiff reaction between 2-mercaptobenzothiazole and 2-chlorobenzaldehyde and p-hydroxy benzaldehyde. The new ligands were characterized by the Infra-red spectroscopy and melting points. The metal complexes, were prepared and isolated in pure solid state, and found to be stable toward light, heat and moisture. These new complexes were characterized via FT.IR , UV-Vis Spectroscopy, magnetic and conductivity measurements. In addition the metal contain were determind by atomic absorption measurement. Different bonding and structural behavior were revealed through the study of the coordination chemistry of the metal complexes of the new ligands. ····· 1036119992
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The focus of the study is the spin column design with different materials. Effects of the binding of DNA with silica, glass microfiber membrane, whatmann filter paper under different binding conditions are discussed. Silica-based media and glass fiber membrane have become the standard for DNA binding in the plasmid preparation process. Chaotropic salts facilitate binding of DNA to the media. This creates a convenient way to wash away contaminants prior to eluting the DNA with a neutral solution, such as TE Buffer or water. Filter paper pellets can easily be processed by vacuum filtration or centrifuge to yield desired quantities of DNA. The use of spin column is a rapid, economic and sensitive method for DNA isolation. The use of these extraction method is both time and cost saving. Average, standard deviation, and coefficient of variation have been calculated for three methods. ····· 1036121415
····· lezzter Preis 44.10€ ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The book `Conversion Coatings on Aluminium` describing the various kinds of surface treatments, conversion coatings of aluminium and its alloys. Aluminium and its alloys have many kinds of composition and very difficult to optimize a certain pre-plating procedure that will be important for the industrial plating procedure. This is the out put of our original research work done in the laboratory (Advanced Materials Research Laboratory, Periyar University, Salem-636 011, Tamil Nadu, India). This book is very useful for the research scholars and students whoever are working in the field of composite/conversion coatings on aluminium. ····· 1036124649
····· lezzter Preis 44.10€ ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray N-methyldiethanolamine (N-MDEA) is used in the natural gas refinery process to remove carbon dioxide (CO2) and hydrogen sulphide (H2S) and was discharged as pollutants with other aromatic hydrocarbons such as Benzene-Toluene-Xylene (BTX) compounds. The small leakage of this component will contaminate the environment and lead to heavy water pollution. These dangerous materials that polluted the water system can effect the aquatic life by consume dissolved oxygen. Thus, some effort must be carried out to overcome these problems. In this study, photocatalytic process has been introduced for the treatment of these compounds using coupled ZnO/TiO2, WO3/TiO2 and ternary ZnO/WO3/TiO2 which were prepared via sol-gel method. The parameters studied in this research were ratio of photocatalyst used, the effect of sonication and ozonation processes, various initial concentrations of substrate and different UV wavelength for the degradation of N-MDEA and BTX compounds in aqueous system. This research should help and provide a new insight to the scientist worldwide in waste water treatment or anyone else who may be considering utilizing this techniques for green environmental efforts. ····· 1036124653
für 45.80€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Bis(phenolate) complexes of the early transition metals, such as titanium, are precatalysts for olefin polymerization. The ligand structure has a strong influence on the stereochemistry of the resulting polymer. For this reason, the bis(phenolate) ligands have been tuned by different substituents on the aromatic rings (R1 and R2) as well as by modifying the bridging unit. S atoms as part of the bridge can improve the catalytic activity, obviously as a result of hemilabile interactions. However, little is known about the bonding situation between the central metal and the ligands` sulfur atoms in these complexes. To clarify the bonding situation between these, according to the HSAB principle, mismatched atoms, bis(phenolato)titanium complexes as model compounds for active catalysts in the homogeneous olefin polymerization were synthesized and examined with high resolution Xray single crystal analysis. With the cyclohexyl bridged ligand a system was found which renders the base frame of the active catalysts. These model compounds do not comprise sterically demanding or disordering groups, which prevent a good resolution in single crystal X-ray analysis. It was possible to get high quality crystals of two different bis(phenolato)titanium complexes and one of the corresponding ligands. Furthermore a simplified cyclohexyl bridged salen ligand was used for complexation with titanium tetrachloride. The first crystal structure for dichlorido-N,N`-bis(salicylidene)-1,2cyclohexanediamino-titanium(IV) is reported here. Based on high-resolution data sets from the single crystal X-ray analysis, a multipole refinement based on the Hansen-Coppens multipole formalism was performed. The multipole refinement leads to an aspherical electron density, which enables the inspection of the bonding conditions in the molecule. With the aspherical electron density, a topological analysis of the bonding states was conducted. ····· 10361108178
····· lezzter Preis 49.00€ ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The work described in this Ph.D. thesis is the outcome of the ideas framed while studying the literature on the development in the area of coordination chemistry. It was aimed to synthesize and characterize some coordination compounds of first row transition metals incorporating the ligands viz., 1,2-diaminophenyl-N,N`-bis-(2-pyridenecarboxaldimine), N,N`-bis-(2-pyridenecarboxaldimine)-1,8-diamino-naphthalene, bis-(thiophene-2-carboxaldimine)-1,8-diaminonaphthalene. ····· 10361134373
····· lezzter Preis 49.00€ ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Specimens of ZrB2 containing various concentrations of SiC, TaB2, and TaSi2 were pressureless-sintered and post-HIPed to theoretical densities. Oxidation resistances were studied by scanning thermogravimetry over the range 1150 - 1550 C, and isothermal thermogravimetry at 1200 - 1900 C. Most silicon-containing compositions formed a glassy surface layer, covering an interior oxide layer. This interior layer was less porous in tantalum-containing compositions. Small concentrations of TaB2 additions were more effective at increasing oxidation resistance than equal additions of TaSi2. The benefit of these additives was related to the formation of fine particles of ZrO2 and TaC during oxidation. These particles resisted wicking of their liquid/glassy borosilicate encapsulation. With increasing TaB2 or TaSi2 concentration, oxidation resistance degraded. In these cases, zirconia dendrites appeared to grow through the glassy layers, providing conduits for oxygen migration. At 1700 C and above, a layer of ZrB2 devoid of SiC was argued to be from preferential removal of SiC by reaction of silica oxidation product with adjacent unreacted SiC to form escaping gases. ····· 10361101673
····· lezzter Preis 49.80€ ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Die Kristallchemie von Seifen und Tensiden Seifen und Tenside sind auf Grund ihrer vielseitigen Einsatzmöglichkeiten als Detergentien und Zusatzstoffe sowohl aus unserem Alltag als auch aus der Industrie nicht mehr wegzudenken. Zusätzlich kommen Tenside in der Biochemie für die gezielte Synthese von Modellmembransystemen zum Einsatz. Infolgedessen besteht ein enormes wissenschaftliches wie auch industrielles Interesse an der Untersuchung ihrer Eigenschaften und ihres strukturchemischen Aufbaus. Im Rahmen dieser Arbeit lag der Forschungsfocus auf den Tensidklassen der Alkylsulfonate und der Alkylcarboxylate. Hierzu wurden folgende Verbindungen strukturchemisch charakterisiert und hinsichtlich ihrer supramolekularen Assoziationen und Eigenschaften im Festkörperverband sowie nach charakteristischen Aspekten, welche für einen möglichen Einsatz als Modellmembransystem sprechen, näher untersucht: Magnesiumethansulfonat-hexahydrat [(H2O)6Mg(C2H5SO3)2] Magensiumdecansulfonat-hexahydrat [(H2O)6Mg(C10H21SO3)2] Magnesiumdodecansulfonat-hexahydrat [(H2O)6Mg(C12H25SO3)2] Magnesiumoctadecansulfonat-hexaydrat [(H2O)6Mg(C18H37SO3)2] Calciumoctansulfonat-monohydrat [(H2O)Ca(C8H17SO3)2] Calciumnonansulfonat-diydrat [(H2O)2Ca(C9H19SO3)2] Calciumdecansulfonat [Ca(C10H21SO3)2] Lithiumoctadecanoat Li(C17H35COO) Natriumhydrogendioctadecanoat [Na(C17H35COO)(C17H35COOH)] Natriumoctadecanoat-hemihydrat [(H2O)Na(C17H35COO)2] Kaliumhydrogenbis(tridecanoat) [K(C12H25COO)(C12H25COOH)] Kaliumpentadecanoat K(C14H29COO) Kaliumheptadecanoat K(C16H33COO) Kaliumoctadecanoat K(C17H35COO) Calciumpropionat-monohydrat [(H2O)Ca(C2H5COO)2] Ferner konnten die Gitterparameter von Magnesiumoctadecanoat-dihydrat [(H2O)2Mg(C17H35COO)2] bestimmt werden. Zusammenfassend zeigen die vorliegenden Ergebnisse, dass die Kristallstrukturen von Seifen und Tensiden sowohl durch den anorganischen als auch durch den organischen Strukturteil des jeweiligen Tensidmoleküls bestimmt werden und dass diese Strukturteile charakteristische Aspekte aufweisen, die für einen Einsatz des Tensids als Modellmembransystem sprechen. ····· 10361107473
für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The main motivation for this dessertation was the need to discover, develop and bring to the knowlegde of the academia as well as the general public, the existence of a cheaper and alternative source of protein within the western sub-region of Africa and in particular, Nigeria. The findings of this research work, I believe, will bring about a significant impact on the well being of the individual who embrace the potentials of this bean. I therefore strongly recommend this write up for anyone who is interested in exploring the nutritional as well as the commercial potential of kidney beans. Anyone interested in further developing the findings put forth in this write up is welcome to do so. Bearing in mind that whatever we are able to discover today will ensure that we leave a legacy behind for future generation of researchers to be build upon. I consider it a priviledge to be able to contribute my quota by means of this research work. ····· 10361172
für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray One of the most important global issues being addressed currently is the storage and release of energy. Hydrogen, due to its light weight, high abundance and safe reaction byproduct is the ideal way to store energy. However, hydrogen s nature as a gas makes it difficult to store efficiently. Metal organic frameworks have been shown to be nearly ten times as efficient in storing a gas compared to a chamber devoid of their presence. Self-assembled ruthenium squares, cubes, and triangles may have the same storage efficiencies. However, the self-assembled structures offer the advantage of control whereby the gas stored may be captured or released when the structure is oxidized or reduced. This book details the synthesis and analysis of ruthenium(II) thioether corners and self-assembled structures. ····· 1036119935
für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Trace elements play an important role in the complex metabolic pathways in human system and their deficiency or in excess may cause disease. Many people all over the world including Pakistan are suffering from urolithiasis i.e. a disease related to urinary stones. The aim of this research study was to develop methods for calibrating the laboratory made standard of urinary calculi, blood and urine against which element were estimated and to see their role in urolithiasis. The work was carried out in such a way so as to classify the estimation of elements in patients and healthy persons.A further classification was also be made taking into consideration the age, sex, diet, water etc. These group were formed after acquiring sufficient data obtained from the survey work. A selected area of Karachi population was taken up in this study.The results were interpreted with respect to the correlation among the trace elements and the effect of each element in urolithiasis.This book which is based on a research study conducted in Karachi, Pakistan would be helpful to the researchers, students, pathologist and medical doctors for the treatment of this disease. ····· 10361119713
····· lezzter Preis 53.10€ ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The book entitled with `Solution Ionophoretic Technique in Study of Metal-Ligand Equilibria` deals with solution ionophoretic technique,which is used for the determination of the stability constants of metal complexes is better than other physiochemical methods but it has some vitiating factors (e.g. diffusion, ionic strength and temperature). This technique is free from these vitiating factors and results are fairly reliable. The technique used in these studies proved to be very useful in studying the stepwise complextion in solution. The special electrophoretic tube which has been designed for this work, yields better results after standardization. This technique provides vivid picturization of complex formation whose stability constant can be determined easily. Its further extension in the study of mixed complexation reactions is obviously a unique advancement in the realm of coordination chemistry. ····· 1036124602
für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Hydrogen can be produced by numerous techniques, with no emission of pollutants and green house gases. Hydrogen has a number of attractive advantages such as high energy density, non-toxic reaction products and abundant natural resources. Sodium borohydride has been considered as hydrogen storage material in the use of renewable energy sources on the way towards sustainable energy of the future. Via this research work, we studied the effect of different phosphorus compounds on the catalytic activity of ruthenium(III) acetylacetonate in the hydrolysis of sodium borohydride and on the kinetics of the catalytic hydrolysis. In addition, synthesis and characterization of ruthenium(III) acetylacetonato complexes containing two trimethylphosphite ligands were studied. Finally, isolation, stabilization and characterization of new ruthenium species (active catalyst), formed during catalytic hydrolysis of sodium borohydride starting with Ru(acac)3 and P(OMe)3, were discussed. ····· 1036186832
für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray In recent years, air pollution due to the hazardous exhaust gases is a serious problem with harmful effects on plants, animals, human health, as well as causing global warming and climate change. Therefore, development of scalable and inexpensive nanosensors for highly sensitive, selective detection and monitoring of toxic gases is extremely important in improving environmental quality and protecting humans from over-exposure to such dangerous agents. One of the methods to improve the gas sensors performances is using the nanomaterials, such as nanoparticles, nano thin films, nanorods, and nanowires. Of those nanomaterials, nanowire structures are of interested due to their two quantum-confined directions while leaving one unconfined direction for electrical conduction, making them suitable for resistive-type gas sensor applications. In this content, I introduce the nanowire structures for gas sensor applications: form materials synthesis to practical devices. I hope you will find that this book provides useful information in the field of gas sensors. ····· 1036187306
für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Landfill leachate with arsenic (As) contamination poses a threat to Florida aquifer because of the nature of the geology of the State. Florida sits directly on limestone which also hosts the main Florida aquifers. But the underlying rock and/or soil dissolve(s) away when the environmental pH becomes acidic. This results in sinkhole formations and is of a great concern especially, in areas of landfill locations. There is a potential of leakage of the leachate from the landfill into the aquifers threatening the quality and safety of the groundwater. In the United States, Class I landfills are classified as non-hazardous and contain materials such as woods and other construction materials. However, the leachate from the Class I landfills sometimes contain Arsenic of significant concentrations. At North Polk County in Florida, leachate from Class I landfill, was treated onsite by coagulation, precipitation and filtration. Occasionally when Arsenic was detected, the leachate was shipped and treated at nearby Waste Water Treatment which was expensive. This work evaluates a possibility of adopting adsorption process in fixed bed which is comparatively less expensive and sustainable ····· 1036191551
für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray In 1959, Richard P. Feynman gave a famous talk entitled There s Plenty of Room at the Bottom in a meeting of American Physical Society conducted at Caltech, USA. Feynman discussed his vision, building of objects atom by atom or molecule by molecule. This was the first idea and constitution of nanotechnology . Hereafter, nanotechnology has been attracted considerable interests in materials science, which is driven by the expectations concerning the application of nanomaterials in many technological applications as a forthcoming generation of functional materials for the new century. Within the last decade, nanoscience and nanotechnology have been considered as the leading research area in the physical and life sciences and engineering. This book consists of synthesis and characterization of coated magnetic spinel nanoparticles by various solution-based processes including hydrothermal, surfactant-assisted, sonochemical, gel-to crystalline, thermal decomposition and co-precipitation methods. Structural, morphological, spectroscopic, magnetic and electrical properties of the spinel nanoparticles were characterized by XRD, FTIR, TEM, SEM, EPR, TGA, and conductivity measurements. ····· 1036191832
für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Among the transition metal oxides, tungsten bronzes have attained considerable attention due to their chemical, electrical and optical properties which depend on the type of alkali-metal atom and its composition. The term tungsten bronze is applied to the non-stoichiometric compounds of general formula MxWO3 (0 x 1), where M is an alkali-metal atom. The common structural feature of these materials is the WO6 octahedra which are repeated along three directions through corner sharing. This structural arrangement provides various kinds of tunnels, which are at least partly occupied by alkali metal atoms. These materials undergo one or more structural phase transitions depending on the content of alkali metal x. The main part of this book is focused on LixWO3-PTB, in order to explore the stability field in the conventional solid state synthesis techniques and to investigate in particular their spectral properties. For polarised micro reflectivity, single crystals of LixWO3 are also prepared by chemical vapour transport method. The spectral and structural properties of Nb-doped and Mo-doped alkali metal tungsten bronzes, AxMyW1-yO3 (A = Li, Na, Cs and M = Nb, Mo) are also discussed. ····· 1036192306
für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray This work reports some original and significant contributions on chiral coordination complexes. Complexes of chiral amino alcohols based Schiff base ligands with biologically and catalytically important metal ions have been developed and studied with respect to their structural, spectroscopic, supramolecular and catalytic properties. The importance of chiral amino alcohol based Schiff base ligands in coordination chemistry is briefly discussed in the introduction chapter. Synthetic details and spectroscopic characterization data of some new chiral Schiff base ligands and their metal complexes are presented in chapter two. Detailed studies on a series of biologically and catalytically relevant chiral Mn(IV) complexes form the content of the third chapter. A series of interesting mixed valence multinuclear cobalt complexes of chiral amino alcohol based ligands has been described in chapter four. Studies on some chiral copper complexes highlighting their structural and supramolecular properties are presented in fifth chapter. Finally, the work is concluded giving an overall summary as the sixth chapter. ····· 1036191357
für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Vanadium has been reported to be an essential bio-element for certain organisms, including tunicates, bacteria and some fungi. This book aimed to describe the coordination chemistry of vanadium with biologically relevant ligands and presents synthesis of oxo, dioxo and oxoperoxovanadium(V) complexes. Most common oxidation states are +IV and +V and generally stabilized through V O bond. Oxocations [VO]2+, [VO]3+ and [VO2]+ are most common for biological systems. The development of structural and functional model complexes of vanadium haloperoxidases is the key motive of vanadium chemistry and some of the complexes can be considered to be structural models of haloperoxidases. The model character also extends to functional similarities, in that they catalyse the oxidation, by oxidant, of sulfoxide, styrene, cyclohexene, phenol, trans-stilbene etc. Vanadium complexes have also been found to catalyze the oxidation and epoxidation of various organic substrates. Some of the complexes have also been tested for their antiamoebic activity. ····· 1036188662
für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The work present in this book deals with preparation and characterization of new complexes which contain some transition ions ( Sc3+, Ti3+, V5+, Cr3+, Mn2+, Fe3+, Co2+, Ni2+, and Cu2+) and non transition metal ions ( Ba2+, Ca2+, Zn2+, Cd2+, and Sn2+) with ligands ( Thymol, Vanillin, o,m,p-Cresol, Salicylic acid, Methyl salicylaste, Guaiacol, Eugenol, and Menthol). The prepared complexes subsequently tried as dental filling passing the required tests of color, pH, setting time, consistency, compressive strength, film thickness, microlekage, and antibacterial. The complex [ calcium-guaiacolate] show superiority in this respect and it is hoped that this complex (as dental filling) establish a chemical binding with the calcium of the tooth. ····· 10361103024
für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Catalytic Oxidative Cracking of n-Hexane is investigated as an alternative route to steam cracking for light olefin production. Light olefins are the building blocks for the petrochemical industry. In a rapidly growing world market for the production of new synthetic materials (plastics), demand for these petrochemicals is tremendously increasing. Propylene and butylene yields from current production technologies (steam cracking, fluidized catalytic cracking (FCC), oxidative dehydrogenation (ODH)) are insufficient to satisfy the growing demand, urging interest in alternative processes for light olefin production. This PhD research work aimed towards achieving higher selectivities to both propylene and butylenes than steam cracking. Mo/Li/MgO is an efficient catalyst for oxidative cracking of n-hexane. The catalyst has minimal red-ox activity and results in reasonably high yields of olefins. Furthermore, plasma induced experiments resulted in higher yields of olefins. ····· 10361102612
für 61.20€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The detection and measurement of gamma radiation using materials that are sensitive to such radiation has been a subject of intense investigation. Optical fiber is found to be a good choice in this regard due to greater sensitivity at different dose levels compared to bulk glass dosimeters. The major advantage in using the fiber is that the radiation sensitivity can be adjusted to the dose or dose rate by selecting suitable fiber design, composition and operating wavelength. In addition, the fibers feature a small weight and transverse size, as well as immunity to electromagnetic interferences. So the dosimeter dimensions can be very small within the area (approx. dia around 3cm ) of wristwatch. The objective of the present thesis work is to develop suitable radiation sensitive optical fibers which can be used as radiation sensor for fiber optic dosimetry application. ····· 103613286
für 61.20€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Rice straw is an alternative source for the production of cellulose pulp and some other useful materials such as xanthated cellulose. The conditions of preparation (pulping, bleaching and xanthation) and factors affecting the main properties of the produced cellulose pulp and xanthated cellulose (the effect of alkali concentration, time of pulping and weight / volume ratio when boiling) are intended. The resulting intermediate products as well as the final products, were characterized and compared at each experimental step. The IR absorption spectral analysis were undertaken according to different methods (Saad et. al., base line technique, back ground and Pirlot methods) Agricultural wastes (cellulosic) treatment and characterization using different methods and analyzing the figures of scanning with electron microscope. ····· 10361102673
für 61.20€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Weakly-ferromagnetic hematite is a cheap, environmentally friendly and thermodynamically stable iron oxide, and 1D hematite nanorods (NRs) have been studied for a wide range of applications because their magnetic properties are greatly dependent on NR size and shape. Herein, the hydrothermal synthesis (HS) of hematite NRs is investigated using a combination of analytical techniques. Development of a novel, valve-assisted, hydrothermal pressure vessel, which allows for the rapid quenching of hydrothermal products as a function of reaction time and known reaction temperature, provided fundamental insight into the anisotropic crystal growth mechanism of the acicular hematite NRs. The hematite NR growth mechanism was found to be a two stage process: 1) the growth and dissolution of intermediate -FeOOH NRs, alongside precipitation of primary hematite nanoparticles (NPs) and 2) the agglomeration and coarsening of primary hematite NPs into hematite NRs. The investigation of rapidly quenched -FeOOH and hematite HS reaction products, heat treated in situ within a transmission electron microscope, provides direct evidence for the hydrothermal growth mechanism of lenticular hematite NRs. ····· 1036191896
für 61.20€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The isolation of the unsymmetrical Schiff bases posed some challenges. Majority of unsymmetrical Schiff bases reported in the literature were synthesized via a stepwise approach. There are only a few procedures which proceed via a one-pot condensation approach because the introduction of different carbonyl groups might lead to the formation of a mixture of products. But by fine-tuning some of the reaction conditions we were able to isolate the desired unsymmetrical Schiff bases at room temperature. The new synthetic procedure for the preparation of the unsymmetrical Schiff bases was developed in our laboratory. The isolation of the unsymmetrical Schiff bases and their VO(IV) complexes as well as some of the symmetrical Schiff bases and their complexes generated in this research work was considered to be novel. The in vitro and in vivo insulin-mimetic studies show that majority of the Schiff base complexes of VO(IV) were active and two of the complexes were as active or more active than insulin. The new results generated in this work significantly advance scientific knowledge and make a useful contribution in the area of insulin-mimetic studies. ····· 1036121284
für 61.20€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray This study on the sites of coordination, nature, and mode of bonding of Fe, Cu, Cd, and Sn in different types of algae, employed FT-IR, Mössbauer and NMR to throw some light on the structural conformations of the formed metal ion moieties. The metal ion uptake by chlorella vulgaris exhibited a linear relationship with ionic radii, where ion exchange dominates at low concentrations of Cu, whilst electrostatic binding showed to be the main mode of binding at high concentrations. Changes in bond vibrations of carboxylates confirmed their dominance as binding sites. In addition, 113Cd NMR spectra suggested the participation of -N and -OH containing ligands, and a six-coordinate structure. The Mössbauer spectra of Fe-57 revealed unequal bond lengths between Fe(III) ion and the bonded ligand atoms, and marine algae exhibited a reducing ability into Fe(II) moieties of low octahedral symmetry. Three polyhedral geometries around Sn-119 tetravalent moieties are in equilibrium, and are concentration dependent. The alga chlorella vulgaris restored part of its lost capacity towards metal binding, upon reuse, by aqueous ethanol metal ion solutions which increased with decrease in ionic radii. ····· 1036192441
für 61.20€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray A polymeric ligand can be used to bind selectivity a specific metal ion form a mixture to isolate important metals from sea or waste water, or to remove toxic metal ions from waste water. This is based on different formation constants between the polymeric ligand and various metal ions. A polymeric ligand is usually used in an insoluble resin form to separate a specific metal ion from a solution containing metal ions. The successive stability constants for the complexation of metal ion with multidentate ligand such as polyvinyl derivatives are different from those of typical metal complexes. The aim of the present work includes the admiration of acryloyl chloride with sulphaguanidine and 2,6-diaminopyridine. The formed monomers were reacted with different metal salts by different methods forming polymer complexes. Different spectroscopic and magnetic measurement techniques were used for elucidation of the structures. Thermal stability of the formed polymer complexes was compared with corresponding homopolymers. ····· 1036121471
für 61.20€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray A glass-ceramic from the MgO-B2O3-SiO2 system, which is a possible candidate for applications in LTCC technology, is presented and described in this monograph. In the introductory part of the book there is a brief description of the basic chemistry and the structure of glasses and the thermodynamics of the crystallization processes of glasses. LTCC technology, the material requirements for substrate applications and the three significant parameters that are used to characterize the microwave dielectric properties are briefly described. Furthermore, a short literature survey of the binary MgO B2O3 and ternary MgO B2O3 SiO2 system were also presented. In the first part of the results and discussions is devoted to the synthesis and microwave dielectric properties of Mg2B2O5 and Mg3B2O6 ceramics, as well as Mg3B2O6-based ceramics exhibiting extremely high quality factors up to 240,000 GHz. The second part is focused on the nucleation and crystallization processes of MgO-B2O3-SiO2 glass with the emphasis on crystallization kinetics and the influence of the concentration of a nucleating agent. Finally, the microwave dielectric properties of the obtained glass-ceramics were evaluated. ····· 10361133298
für 61.20€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Molecules well known for their chelating properties are clubbed with the molecules well known for their antimicrobial activity. A resultant novel molecule is found to have retained both the parental properties with a reasonable thermal and chemical stability. In this text, we have presented the outcome of research work done by Bhargav Trivedi for his PhD thesis submitted to Hemchandracharya North Gujarat University, Patan, India under the supervision of Dr. Piyush J. Vyas. ····· 10361102078
für 61.20€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Applications Transition metal complexes of acylhydrazones and related N, O donor Schiff bases and their metal complexes have attracted considerable attention during recent years because of their applications in several bio-chemical, industrial and analytical processes. Some of the applications of these compounds are mentioned below: As biological probes As optical devices As catalyst Mesogenic behavior As sensing material As DNA cleaving agents Super oxide dismutase-mimic activity In analytical processes Other uses The hydrazones have been used as plasticizers and stabilizers for polymers [Kuhn et al. (2001), Gupta et al. (2007)], polymerization initiators and antioxidants etc. Hydrazone compounds have the ability to control the release of volatile aldehydes and ketones [Levrand et al. (2006)]. The phenyl derivative Schiff bases have been used as corrosion inhibitors for aluminium in hydrochloric solution [Unaleroglu et al. (2001)]. It is apparent from the above applications that the selected field of transition metal complexes of N, O donor ligands is very useful and multi-dimensional. Each new ligand/ new complex or new study gives a new direction to the area of research. ····· 10361113100
für 61.20€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The synthesis, structural characterization and reactivity of transition metal phenoxides is rapidly expanding field of study. The phenoxide ion is an important ligand in inorganic chemistry because it provides not only a strong metal-oxygen bond but a flexible organic moiety having an advantage over analogous alkoxide ligands in that electronic properties can easily be varied by changing the substituents in the phenyl ring and steric effects in close proximity to metal can be modified by varying the bulk of substituents at ortho and para positions of the ring. Recent research in the field of metal aryloxides has grown rapidly not only because of their structural properties but also due to their potential applications . This book is divided into four chapters. Each chapter covers different aspects of mixed ligand complexes of zirconium like synthesis, characterization, reactivity, thermal analysis etc. this book is intended to give insight into transition metal phenoxides especially zirconium(IV) and is helpful for students/ researchers who want to pursue research in the area of transition metal chemistry land thermal analysis. ····· 10361113405
für 61.20€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The work described in this thesis concerns the filling of Single-Walled Carbon Nanotubes (SWNTs) with semiconductor compounds (HgTe, HgxCd1-xTe, InSb, SnSe). Once successfully introduced into the SWNTs, the fillings were structurally analysed via focal series restoration High Resolution Transmission Electron Microscopy (HRTEM). For each system, models were proposed, simulated and compared with original restored phase images. ····· 1036187267
für 61.20€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray This work describes the physico-chemical studies of metal complexes with N and S donor ligands. Emphasis has been given to the synthesis and characterization of polyazamacrocycles and dithiocarbamato complexes of transition metal ions and Sn(IV). They have been characterized by FT-IR, NMR (1H, 13C and 119Sn), mass spectrometry and X-ray crystallography. The synthesis of 14-membered hexaaza macrocyclic complexes of the type [CuL]X2, [CuL1]X2, [CuL(N3)(ClO4).3/2O]n, [CuL(N3)2] and [CuL1(N3)(ClO4)]n was reported. The effect of anions on the gross geometry and chemical properties of the Cu(II) ion have been studied. The crystal structure of [Ni(L)][CoCl4] clearly establishes the cationic-anionic interaction. Rare C H---Ni anagostic interactions, generally exhibited by d8 complexes also observed. The interaction of potassium bis(2,2-dithiopiperazinato-2,2-diaminodiethylamine (K2L) with R2SnCl2 leading to the formation of bimetallic complexes of the type R4Sn2L2 have been reported. The synthesis of a mononuclear precursor complex, [(CH3)2Sn(tpdtc)] and several heterobimetallic derivatives of the type, [(CH3)2Sn(tpdtc)]MCl2 have also been reported. ····· 10361114097
für 61.20€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Regulations concerning automotive emissions are becoming more stringent in recent times and consequently more research efforts have directed toward lowering the environmental impact of pollutants emitted by vehicles and industries. In this context, the research focus has been aimed at the development of more efficient and highly resistant catalytic materials which could be able to maintain maximum durability while decreasing pollutant emissions to minimum levels. Three-way catalysts (TWCs) constitute the most satisfactory and efficient solution to reduce pollutant emissions from gasoline-engine-powered vehicles. This book which is based on a comprehensive research study gives an insight on the development of novel nanosized cerium oxide based catalysts for TWC and other catalytic applications. It contributes invaluable information on how catalysts composition can be manipulated for better performance. This book will be especially useful to researchers working in the field of catalysts development, catalyst`s structural analysis, environmental catalysis, and more specifically in the area nanocatalysis. ····· 10361114641
····· lezzter Preis 61.20€ ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Corrosion damages is the biggest item on the maintenance bill of reinforced concrete (RC) structures. Chloride induced corrosion is the main cause for corrosion initiation. Chloride is the main cause for corrosion initiation in RC. Understanding the corrosion process and the parameters which influence the susceptibility for corrosion initiation, is essential for reducing the cost of corrosion in modern buildings. This book presents the theory of corrosion in reinforced concrete and describe an investigation of the relationship between the micro-structure of the interfacial transition zone (ITZ) between the concrete and the embedded steel and the chloride concentration for corrosion initiation (chloride threshold). It includes a complete description of the method used in the investigation, results, and comprehensive discussion. ····· 1036125285
····· lezzter Preis 62.10€ ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Los procesos para la deposición de recubrimientos en el estado sólido tales como la Vaporización Física (PVD) y Rociado Térmico, se han empleado para depositar materiales tanto metálicos, cerámicos y una mezcla de éstos. Por medio del proceso de Aleado Mecánico (AM) ha sido posible la obtención de materiales base titanio, que por los métodos convencionales sería imposible de obtener. Con el AM, se obtuvieron aleaciones base titanio en los sistemas Ti-Al, Ti-BN y Ti-Al-BN para la deposición de recubrimientos por PVD y Rociado Térmico. Todos los sistemas de aleación después de molienda reportaron un tamaño de grano del orden de nanómetros. El sistema Ti-Al presentó una gran tendencia a la formación de TiH conforme se incrementó el contenido de aluminio. El sistema Ti-BN mostró una gran afinidad a la formación de TiN, TiB y TiB2. El sistema ternario Ti-BN-Al reportó a bajos contenidos de aluminio una mayor proporción de la fase TiB2 mientras que a altos contenidos de aluminio prevalecen los compuestos de aluminio Ti2AlN y Al2Ti. Los sistemas de aleación base titanio no antes reportados en la literatura muestran ser materiales potenciales para problemas de corrosión-erosión. ····· 1036123050
für 62.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray En esta tesis se describe la síntesis y caracterización de una familia de ligandos orgánicos (N-pirazol, O-alcohol y N-pirazol, O-éter), y su utilización en la síntesis de complejos con diferentes metales de transición, preferentemente Pd(II), pero también con otros metales tanto del Grupo 10 como del Grupo 12 de la Tabla Periódica. También se ha ensayado la capacidad catalítica de algunos de los complejos de Pd(II) en la reacción de Heck, y la capacidad de los ligandos N-pirazol, O-éter en la síntesis y estabilización de nanopartículas.En total se han sintetizado un total de 22 complejos. La caracterización de los complejos se ha hecho utilizando diferentes técnicas: Análisis elementales, Medidas de conductividad, Espectrometría de masas, Espectroscopía de IR, RMN (unidimensionales, bidimensionales) y por difracción de rayos-X en monocristal siempre que ha sido posible además de medidas de fluorescencia para algunos complejos. ····· 10361116814
für 64.71€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The book presents the synthesis of silica aerogels and wide applications in industrial and other fields owing to their exceptional unique properties of silica aerogels. The silica aerogels are synthesized using different methods and the attempts have been made to reduce cost and enhance strength of silica network using various approaches. The silica aerogels are synthesized by Sol-Gel process followed by ambient pressure drying or supercritical extraction process. The experimental results on surface modification process and tuning of surface free energy of silica aerogels are demonstrated. Also the experimental details on synthesis of silica aeroges by new rapid supercritical extraction process within 3 h of total processing time, i.e. direct sol to aerogels are discussed in details. ····· 1036119162
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Advanced oxidation technologies (AOT) have been developed for the detoxification of water contaminated with persistent organic chemicals. The method utilizing the strong oxidizing potential of the hydroxyl radical has proven effective and promising technologies which aim at the decolorization and mineralization of a wide range of contaminants including dyes. The strategies for generating the reactive hydroxyl radical ( OH) for these oxidation methods include UV photolysis of hydrogen peroxide (UV/H2O2), Fenton (Fe(+n)/H2O2) or photo-Fenton type reactions (UV/Fe(+n)/H2O2). Usually Fenton or photo-Fenton reaction used to enhancement the production of OH radicals through the inter- reaction of hydrogen peroxide with Fe+n salts. A cheap source of Fen+ such as zero valent iron (ZVI) powder Fe(0) may be used in the photo-Fenton reaction. Furthermore, application of nanotechnology for the preparation of nanoparticles zero valent iron (NZVI) powder would lead to enhancement the properties of Fe0 powder.One of the main objectives of this study was to prepare iron nanoparticles powder and to investigate its effect on the photodegradation process. ····· 10361113315
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray This book deals with some modern methods used in the synthesis and characterization of transition metal complexes. It is written primarily to stimulate the interest of students in metallo-organic chemistry and spectroscopy as well. The book is contained much useful spectral data in the form of tables and spectra. It contains a number of electronic, IR and EPR spectra, so the reader who is not familiar with these techniques can see how the spectra actually appear. It begins with a general introduction of applications of transition metal complexes in different fields. In subsequent chapters the detailed study regarding the synthesis and physicochemical characterization of bivalent transition metal ions [Cr(III), Mn(II), Co(II), Ni(II) and Cu(II)] complexes derived from 2-methylcyclohexanone semicarbazone and thiosemicarbazone using modern techniques like elemental analysis, magnetic moments and conductance measurements and spectroscopic (Electronic,IR, EPR ) studies is discussed. The geometry of synthesized complexes is emphasized. The book is intended to be useful to new metallo-organic researchers. ····· 1036187283
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Sodium silicate from rice husk ash was functionalized with different silylating agents to produce silica with CH2 Cl (labelled as RHACCl), CH2 NH2 (labelled as RHAPrNH2) and CH2 SH (labelled as RHAPrSH) end groups via a novel one pot synthesis. Saccharine (Sac) and Melamine (Mela) were immobilized onto RHACCl to form RHAC-Sac and RHAPrMela. The functionalized CH2 SH group in RHAPrSH was oxidized to sulfonic acid, CH2 SO3H (labelled as RHAPrSO3H) with hydrogen peroxide at room temperature. The catalysts showed good textural and structural properties. RHAC-Sac, RHAPrMela, RHAPrSO3H, RHA Blank (as control) as well as homogenous Sac and homogenous Mela were used as catalysts in the esterification reaction. The catalytic activity was found to follow the sequence: RHAPrSO3H RHAPrMela homogenous Sac RHAC Sac homogenous Mela RHA Blank. The catalysts were easily regenerated and could be reused several times without loss of catalytic activity. ····· 10361102498
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The present book primarily deals with the lower rim substituted calix[4]arene derivatives and their metal ion complexes, and the biomimetic and biological studies of these complexes. Broadly, the book could be divided into the following three parts: (i) The K+ was found to act as template in the formation of calix[4]arene tetra-amide derivative exclusively, with the generation of calix[4]arene-monoanion and the structure of this has been characterized by single crystal XRD study. (ii) Metal ion complexes of p-tert-butylcalix[4]arene-diacid with Mn(II), Mn(IV), Fe(III), Co(II), Ni(II), Cu(II), Zn(II) and Sn(IV) have been discussed. Co-administration of lead and tin complexes on porphyrin metabolism, oxidative stress and distribution of metal ion concentration in blood and soft tissues in rats have been evaluated. (iii) Anthracene anchored derivatives of p-tert-butyl-calix[4]arene were subjected to the binding studies with the divalent metal ions. Based on the photo-physical studies, an imine-based derivative were found to act as a chemosensor for Fe(II)and Cu(II) ions. ····· 1036188261
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The increased use of diesel driven vehicles for all categories of commercial automobiles and even for private cars is the major trend observed worldwide in transportation field. The energy advantages of the diesel engines are unquestioned, lower cost of diesel fuel is also responsible for its increasing popularity, particularly with respect to the less developed countries. The major pollutants emitted from diesel engines are PM (particulate matter) and NOx. The PM is a potential carcinogen and its effective control is a primary target from environmental point of view. The most promising approach to reduce the PM emissions from diesel vehicles is after-exhaust treatment, using a Diesel Particulate Filter (DPF). ····· 1036120455
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The work covered herein discusses for the first time various techniques used in the fabrication of metal oxide nanofibers and nanotubes from eletrospun carbon fibers as templates. The nanofibers were prepared by electrospinning metal oxide precursor inside a polymer matrix. The metal oxide tubes were by tubes by fiber templating. This was followed by calcination to yield the nanofibers and nanotubes. Their morphological, structural, optoelectronic and catalytic properties are also discussed. Among key applications they have found utilization as catalyst supports. Palladium nanoparticles have been supported on Titanium dioxide nanofibers and applied in Heck-coupling reactions. Similarly, included is the effect of impurities on the metal oxide tubes properties done by doping with metal ions. In addition, photocatalytic behavior of metal oxides nanofibers have also been discussed. ····· 1036120456
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Metal-carboxylate complexes and coordination polymers are the fields of research that has risen rapidly over recent years to the forefront of modern chemistry and material science. Simultaneously the crystal engineering of metal carboxylates, especially coordination polymers has been greatly developed in the past decade. Supramolecular architecture of metal carboxylates can be directly constructed by using metal ions existing in various coordination geometries combined with multifunctional ligands. This book presents the synthesis, characterization and structural aspects of some first row transition metal carboxylates along with the study of molecular/anion recognition properties of carboxylic acid derivatives. The synthetic methods, diverse coordination modes, attractive solid-state structures, solution behaviour, as well as their diverse applications are discussed. Special efforts have been made to discuss the formation of different types of the structures and the control over their syntheses. ····· 1036121110
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The text book entitled Fundamentals of Inorganic Chemistry covers both the theoretical and descriptive aspects of the subject and emphasis mostly on topics required for undergraduate programme in chemistry. Many worked out examples have been included along with exercises necessary to enhance their analytical skills. The summary of chapter has been given at the end of each chapter. The book has been made more informative and voluminous and the subject matter has been presented in a very simple language, clear style along with a large number of fully illustrative diagrams. In all the chapters, a number of solved examples have been incorporated to understand the concept easily and also that would help in attempting to solve the given questions and problems. The questions in the form of exercises would enable the students to know and have a better idea of finding the all possible and probable questions for the examination. As an Author, I personally believe that this text book will definitely deliver all necessary information for the benefit of readers. ····· 1036121180
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray This book presents the results for the physical and chemical characterisation of co-disposal precipitates prepared from the co-disposal of acid mine drainage and fly ash. The prepared high capacity ion exchange adsorbents were characterised using fundamental characterisation tools such as X-ray Diffraction Spectrometry (XRD), X-ray Fluorescence Spectrometry (XRF), Scanning Electron Microscopy (SEM), Inductively Coupled Plasma Mass Spectrometry (ICP-MS), Fourier Transformed Infrared Spectrometry (FTIR) and Cation Exchange Capacity (CEC). The prepared zeolitic material were also applied in toxic element removal experiments, to assess its ability to reduce the concentrations of some heavy metal ions in wastewater. ····· 10361113914
····· lezzter Preis 71.10€ ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The research work has been divided into two parts. In Part A, various di- and triorganotin(IV) compounds have been synthesized by reactions of R2SnCl2, R2SnO and R3SnCl with a stoichiometric amount of synthesized carboxylic acid. In Part B, various di-, tri- and chlorodiorganotin(IV) thiocarboxylates have been synthesized by the reaction of di- and triorganotin(IV) chlorides with thiocarboxylic acid in stoichiometric amount in dry toluene under reflux conditions. The structural assignments were made on the basis of spectral techniques such as FT-IR, 1H, 13C, 119Sn NMR, mass spectrometry and XRD which ascertain the tetrahedral environment around the tin atom in solution, while penta or hexa coordination is found in the solid state. Biological activity tests of the synthesized carboxylates and thiocarboxylates were made against various medically important bacteria, fungi, insects and leishmania. Most of the compounds were found to show activity with a few exceptions. These compounds were also evaluated for their cytotoxicity using the brine-shrimp lethality bioassay method. Only few of the compounds were found to be nontoxic. ····· 10361101068
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The ability of plasticizers and superplasticizers to reduce the water-cement ratio without changing the workability of concrete is a well-known fact. On the other hand, they may improve and / or facilitate the conditions the conditions of cement handling. Thus in this thesis, the effect of the presence of two different water-reducing admixtures, namely, calcium lignosulfonate (CLS) and sodium salt of naphthalene formaldehyde sulfonic acid polycondensate (NFS) on the hydration process of each of C3A and B3A with gypsum was studied. ····· 1036187040
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Azosulfonamide rhodanines are widely used as analytical reagents. They are capable of forming chelates with many of metal ions. The formed chelates are distinguished by their stability due to the formation of chelate ring. From the structural point of view, these were considered as metal indicators since they posses functional groups capable of chelate formation joined directly to the central metal ions.In the present investigation, proton-ligand stability constant, pKH, of azosulfonamide rhodanine compounds will be determined potentiometrically in 20% (v/v) DMF-water mixture. The metal-ligand stability constantsof the compounds with Fe2+, Cd2+, Fe3+,UO2 2+ and Zr4+ will be determined potentiometrically. Stoichiometeries of the complexes formed in solution will be determined potentiometrically. The enthalpy change, the entorpy change, and the free energy change, of the compounds and their complexes will be evaluated and discussed. The structure of these chelates will be elucidated from the study of their elementalanalyses, infrared spectra, 1H-NMR spectrum, electronic spectra, magnetic measurements and ESR. ····· 10361100964
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Electron irradiation may be a useful method for treating inorganic cosmetic powders such as talc for undesirable microorganisms if it can be established that no loss of quality or efficacy results as a consequence of the technique. A commercial electron accelerator was used to prepare bulk samples by exposure to electron irradiation under different conditions. A morphological characterisation of the control talc was carried out using microscopy techniques and focused on the particle size, shape and surface features of individual particles. Asperity dimensions vs. Roughness values were compared. Assessment of the bulk properties of the powders as a function of absorbed dose showed no serious impact on the quality or efficacy of the powder for cosmetic applications. The particle size and the level of dust expelled during impact were maintained. Changes to the surface chemistry of the irradiated powders were apparent from an increase in pH and water retention with increasing dose. Improvements to the fragrance retention occurred for both irradiated powders tested. Importantly a satisfactory microorganism level was achieved with the lowest absorbed dose level tested i.e. 5 kGy. ····· 10361133075
····· lezzter Preis 71.10€ ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray This book highlighted the methods used for the syntheses of thiosemicarbazide and their metal complexes. Molecular modelling for all prepared compounds was investigated. Dissociation and formation constants were calculated for ligands and complexes respectively. In vitro and in vivo studies for thiosemicarbazides showed high potent antitumor activity. Finally, this book reported thiosemcarbazide derivatives as organic chelates (which are not pollutant for water media and may have biological importance) for the separation of about 100% of Hg2+, Mn2+ and Cd2+ ions. ····· 1036124483
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Research into the chemistry of supramolecular coordination polymers has rapidly grown in recent years due to an increased demand for functional materials with tunable properties such as catalytic, conductive, luminescent, magnetic, non-linear optical effects or the formation of porous materials. The general purpose of this work is to examine the use of merury cyanide as a potential building block in the preparation of multidimensional coordination polymers. In order to narrow the scope of the research undertaken, this work will specifically focus on the development of mercury cyanide/chloride double salt coordination polymers. By doing so the concept of using Hg(II) as a universal glue to generate extended frameworks with increased dimensionality will be assessed. Attention is given to the various factors influencing the formation of such complexes including reactant stoichiometry, ligand basicity, solvent, and hydrogen bonding interactions. This survey should aid in the development of a predictable approach to designing mercury cyanide containing coordination polymers with a given dimensionality and their potential material properties. ····· 10361132644
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray In recent years, interest in the preparation and characterization of the na-noporous materials has grown due to their distinctive properties and potential applications. Among them, silica aerogel are transparent, highly porous and lightest synthetic solids. Silica aerogels, prepared by sol-gel method followed by supercritical drying, have various extraordinary properties viz. low density (~20 mg/cm3) and thermal conductivity (0.05 W/mK), low sound velocity (~100 m/s) and large surface area ( 1500 m2/g). Due to this unique combination of properties, aerogels are considered as a new class solid state porous material having various scientific and technological applications like super insulating transparent fillers in double walled windows, catalytic supports, Cerenkov detectors, filters and containers for capturing of micrometeorites in space. However, economic large-scale industrial production of silica aerogels is hampered by expensive supercritical drying methods. The present book describes the results of detailed studies made on the synthesis and characterization of silica aerogels and related nano-porous materials by various methods and precursors at ambient pressure. ····· 10361113047
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray This work has been carried out to investigate thecatalytic activity of some Schiff Base complexes incyclopropanation of non-activated olefins. Ten newSchiff base ligands were prepared (three diamines andseven thiosemicarbazones) and Characterized byelemental analyses and spectral studies (IR, NMR, UVand mass spectroscopy). One of the prepared diamineligands was optically active. Moreover, sometransition metal complexes of these ligands wereprepared by the reaction of the transition metal ionswith these new ligands, and characterized byelemental analyses, spectrophotometric studies (IR,NMR, ESR and UV-Vis.), molar conductivity andmagnetic moment determinations beside ESRmeasurements to enable the elucidation of thegeometrical structure of the prepared metalcomplexes. The results came with good agreement withthe proposed structures. Some of the prepared copperand cobalt complexes were investigated for theircatalytic activity in cyclopropanation ofnon-activated olefins and some of them showed anexcellent reactivity with a moderate to excellentselectivity. Five of the examined copper complexescan be used as catalysts in industry. ····· 10361118172
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The synthesis and coordination chemistry of elevenbridging ligands, eight of which are new compounds,are described. These ligands are all based on thetridentate terpyridyl system. The other metal ionbinding sites of these ligands containpyridine/bipyridine/pyrazole rings oramine/azamacrocycles domains. In these ligands, thetwo metal ion binding sites are differentiated by thenumber of atoms in each site, the configuration ofthe binding site or the types of donor atom that arepresent. Many of the complexes synthesized aremono-ruthenium(II) complexes where Ru(II) ions aresituated in the terpyridyl sites of the ligands.These include heteroleptic Ru(II) complexes of thetype [Ru(ttp)(L)]2+, where ttp is4`-(p-tolyl)-2,2`:6`,2`-terpyridine, and L is thebridging ligand. A combination of NMR spectroscopy,ESI-MS, UV-vis spectroscopy, elemental analysis, andX-ray crystallography has been used to characterizethe ligands and their complexes. The crystalstructures of one new ligand and sixteen complexesare described. ····· 10361118124
····· lezzter Preis 88.20€ ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray El estudio de los complejos metálicos con ligandos de naturaleza tiolato puede considerarse, dentro de la Química de la Coordinación actual, un campo de gran relevancia. Ello es debido a diferentes factores, entre los que podríamos destacar, en el área de la Bioinorgánica, por el papel que juegan las uniones metaltiolato en diferentes metaloproteinas, por su interés en el campo de la medicina al poder ser utilizados como agentes antitumorales y por último por su capacidad de ser usados como precursores en procesos de deposición de películas finas semiconductoras bien del metal o de sulfuros metálicos a partir de fases gaseosas. Estos procesos exigen, por una parte, la presencia de especies de baja moleculariad y por otra que estas especies sean suficientemente estables de tal forma que puedan ser sublimadas sin que se produzcan procesos previos de descomposición. ····· 1036123944
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