für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Our work explains basics of engine and thermodynamics involved in it. Formation of combustion products and chemical equilibrium between the combustion products formed are key challenges of ic engine s. Requirement of new engines to overcomes those challenges. Discussing about the tribological material and its interaction inside the ic engines, we seek for specialized coatings in order to provide a catalytic combustion chamber which enhances combustion, increases efficiency of the engines, reduces emission of pollutants, and reduces wear of the tribological materials and extending their life. Selection of coatings based upon the desired characteristics for the overall upliftment of the engine performance. Thermal barrier coating and nanocoatings of the desired material can be achieved with atmosphere plasma sprayed coating (aps) and high velocity oxy-fuel coating (hvof) technologies which can be applied on the desired surface for achieving better efficiency from the engines which effects and consequences of coating on ic engine performance. ····· 1036118931
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray To those involved in the heterocyclic chemistry field, the need for a focus on 5-aminopyrazoles is apparent. This volume is intended to meet that need since the biological and medicinal activities of 5-aminopyrazoles have prompted enormous research aimed at developing synthetic routes to these ring systems. A search of the literature revealed large number of 5-aminopyrazole ring systems that fit this criteria. Such a fact may not be surprising for those who are interested in the chemistry of this class of compounds as, of course, there are theoretical and practical reasons for this interest. 5-Aminopyrazoles became of recent importance due to the reported anti-inflammatory and antipyretic properties of many of these derivatives. Moreover, in recent years, these derivatives have extensively utilized as intermediates for synthesis of fused pyrazoles of potential biological activity. The chemistry of 5-aminopyrazoles have been reviewed in two books which were published in 1964 and in 1967. The extensive literature that has been published since both books appeared made it mandatory to update knowledge in this area. ····· 1036118714
····· lezzter Preis 44.10€ ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Butyl inner tubes are used as inner tubes and inner liners in tubeless tyres. After some time it is disposed as waste because its efficiency has become reduced. Proper disposal or beneficiation of waste inner butyl tubes are of the great concern, both environmentally and for resources conservation. An environmentally friendly method for conversion of used isobutyl isoprene rubber inner butyl tube into useful products has been investigated. The method is based on catalytic cracking using batch type reactor. Optimum conditions like temperature, catalyst weight and reaction time were optimized for maximum conversion into oil for a variety of catalysts. ····· 1036118690
für 61.20€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Superparamagnetic iron-oxide nanoparticles with tailored surface chemistry may be regarded as one of the most popular multifunctional materials for biomedical applications. Their unique capabilities to enhance the proton relaxation of specific tissues, coupled with outstanding magnetic manipulability make them highly promising probes/ vectors for magnetic resonance imaging (MRI) contrast enhancement, magnetic fluid hyperthermia (MFH) for selective destruction of cancer cells and magnetically modulated drug or gene delivery. The present study contributes some new tool-boxes for the facile, water-based synthesis of biocompatible coating-stabilized multifunctional iron-oxide nanoparticles (MNPs), simultaneously integrated with fluorophores, targeting agents and/ or chemotherapeutic drugs. Herein, we describe some novel strategies to design and synthesize theragnostic MNPs that can simultaneously trace, target and kill cancer cells while allowing a real time monitoring of drug delivery through combined MR and fluorescence imaging. ····· 1036118451
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Cell division is a physiological process that occurs in almost all tissues and under many circumstances. Under normal conditions, the balance between proliferation and programmed cell death usually in the form of apoptosis, is maintained by tightly regulating both processes to ensure the integrity of organs and tissues. A brain tumor is the growth of abnormal cells in the tissues of the brain. Malignant brain tumors are among the most aggressive cancers for which no current satisfactory treatment exists. There are rapidly growing tumor cells that have glycolytic rates that are up to 200 times higher than those of their normal tissues of origin this occurs even if oxygen is plentiful. This change in metabolism is the fundamental cause of cancer. This study focuses on developing new lead pharmaceutical compounds in an attempt to cure cancer. The research was conducted by using CEM s Microwave-Accelerated Reaction System (MARS) and green chemistry principles that has led to the development of cleaner chemical processes. ····· 1036118433
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The reaction of pyruvic acid phenylhydrazone [HPAPD, (1)] with organotin(IV) chloride(s) yielded the organotin(IV) complexes (2-11). Molecular structural assessments of the complexes (2-11) have been based on data from UV-Vis, IR, 1H and 13C NMR spectral studies. The molecular structure of HPAPD (1) has also been determined by X-ray diffraction. Spectroscopic data suggested that HPAPD (1) is coordinated to the tin(IV) atom via carboxylate-O and azomethine-N atoms and acted as a mononegative bidentate chelating agent in all the organotin(IV) complexes (2-11). Spectral data indicated that thiocyanate group is N-coordinated to the Sn(IV) ion in the complexes (7-9). The coordination number of tin in all the organotin(IV) complexes (2-11) is five. The cytotoxicity of the compounds 1-11 was studied against Artemia salina. The free ligand (1) and its organotin(IV) complexes (2-11) were assayed for in vitro antibacterial activity against Staphylococcus aureus, Bacillus subtilis, Enterobacter aerogenese, Escherichia coli and Salmonella typhi. The biological studies showed that all organotin(IV) complexes (2-11) are more potent antibacterial and cytotoxic agents than their free ligand (1). ····· 1036118412
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The oilfields of North-East India is regarded as one of the oldest oilfields in the world. Crude oil is being produced from North-East India for more than 115 years. Prior to 1989, oil was produced from Girujan (upper to middle Miocene), Tipam (lower Miocene) and Barail (Oligocene) formation. Since 1989, oil is being produced from Sylhet limestone and Langpar (Eocene) formation in increasing quantities. All these oils are waxy in nature. They have a wide range of API gravity and pour point. Modern analytical techniques like HPLC, MPLC, TLC-FID, FT-IR, NMR (1H and13C) spectroscopy, HTGC, GC-MS, X-ray diffractometry, Interfacial tension, HPLC, UV-Visible spectroscopy, differential scanning calorimetry, thermo gravimetric analysis, Rock-Eval analysis and pyrolysis Gas chromatograph-mass spectrometry were used to understand the chemical composition of the heavier fractions of these oils. A new Geochemical analysis technique i.e. pyrolysis of asphaltenes and using aromatic biomarkers like alkyl naphthalenes and alkyl phenanthrenes produced as a result of pyrolysis of asphaltenes is introduced. ····· 1036118410
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray This book describes the thermal fragmentation of heterocycles to give extended cumulenes called iminopropadienones, observed by infrared spectroscopy at 8 K and trapped by preparative flash vacuum pyrolysis (FVP). Chapter 1 describes the generation of iminopropadienones from Meldrum`s acid derivatives. Chapter 2 describes the generation of 2,6-diflourophenyl iminopropadienone from 3- (2,6-difluorophenyl)isoxazolo[5,4-d]pyrimidine-4(5H)-one and a comparison with the generation of the same iminopropadienone from the Meldrum`s acid derivative. Chapter 3 pyridopyrimidinones and a novel mesoionic compound (pyridopyrimidin-l-ium-2-olate) were used as precursors to generate iminopropadienones through flash vacuum pyrolysis. In Chapter 4, X-ray crystallography as well as theoretical calculations are used to investigate the unusual structural characteristics of Meldrum`s acid derivatives used as precursors of iminopropadienones. These molecules were found to have zwitterionic and non-planar structures. ····· 1036118381
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The chemistry of antioxidants has developed rapidly. Natural and synthetic antioxidants found their various applications in petrochemical industry,cosmetics, food industry, and rubber industry and in medicines. This book will be of immense value to students, practicing professionals and others to learn something about the importance of antioxidants. This book is unique in this sense that it elucidates the role of spectrophotometry in evaluating the antioxidant potential of natural and synthetic compounds. In addition, it will give you an idea to identify the class of natural products by simple phytochemical screening tests. The present study aimed to investigate the antioxidant potential of Monotheca buxifolia by employing some in-vitro contemporary methods. The results obtained and Phytochemical screening deduce that Monotheca buxifolia possesses effective natural antioxidants and radical scavenging activity but it can not be associated with the total phenolic and total Flavanoid contents of the plant. ····· 1036118205
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The textbook discusses the key methods used in organic synthesis, showing the value and scope of these methods and how they are used in the synthesis of complex molecules. All the text from the has been revised, to produce a modern account of traditional methods and an up-to-date description of recent advancements in synthetic chemistry. The textbook maintains a traditional concluding with oxidation and reduction reactions. In addition, a selection of problems has been added at the end of chapter, with answers. The book will be of significant interest to chemistry and biochemistry students at advanced undergraduate and graduate level, as well as to researchers in academia and industry who wish to familiarize themselves with modern synthetic methods. ····· 1036118198
für 61.20€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray For the first time, new metallophthalocyanine (MPc) complexes: (i) nanostructured metallophthalocyanine, octabutyl sulphonyl phthalocyanine and iron(II)tetrakis(diaquaplatinum)octacarboxyphthalocyanine were synthesized and characterized using advanced microscopic and spectroscopic techniques such as MS, AFM, HRTEM, FESEM and EDX. Electrochemical techniques such as cyclic voltammetry, square wave voltammetry, chronoamperometry,rotating disk electrode and electrochemical impedance spectroscopy were used to explore the redox chemistry, heterogeneous electron transfer kinetics and electrocatalytic properties of these MPc complexes towards oxygen reduction reaction (ORR), oxidation of formic acid, thiocyanate and nitrite on a edge plane pyrolytic graphite electrode (EPPGE) platform pre-modified with or without acid functionalized multi-walled carbon nanotubes (MWCNTs). ····· 1036118129
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Drug discovery is a complex and interdisciplinary research, often with conflicting goals and a complex large data used for the development of a balanced clinical candidate. Written from the perspective of drug discovery, it is a practical guide for the analyst and ADME scientists and advanced students in this field. Separate chapters discuss each important aspect, covering the fundamental concepts of separation science, mass spectrometry and pharmacokinetic (PK) studies discussed with minimum mathematical equations. The present book provides in-hand solutions for offline and online sample extraction methods, column switching techniques, chiral separations and validation of the optimized methods as per the standard protocol and FDA guidelines. With practical details obtained in analytical laboratory synthesis of drug metabolites and related substances, their characterization, separation, validation and applications in PK studies, book provides a successful approach to design, planning, execution and interpretation of research studies. This book will serve as a practical reference in regular use for researchers and scientist interested in drug discovery. ····· 1036118104
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The book in hand can furnish baseline information about transition metal complexes synthesized by the reaction of metal salts with Schiff base derived from aniline and salicylaldehyde. All these complexes soluble in DMSO have been characterized through physical techniques such as melting point and elemental analysis, it has been observed that organic ligand bound to central metal atom through the oxygen bond of hydroxyl group, the physical state of metal complexes after reaction with the ligand vary from metal to metal. The complex confirmation was made through melting point and also through elemental analysis. The IR data of the complexes provide sufficient information about the geometry of complexes. Therefore it should be in every scientific library around the country. ····· 1036118055
für 61.20€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Osobennost`yu predstavlyaemoy monografii yavlyaetsya to, chto biodegradiruemye fragmenty polimernykh kon`yugatov BAV, obsuzhdaemye v monografii, postroeny iz -aminokislot, pri etom oni mogut obladat` sobstvennoy biologicheskoy aktivnost`yu (gormonal`noy, fermentativnoy i t. d.). Rassmotreny razlichnye varianty arkhitektury biodegradiruemykh fragmentov polimernykh nositeley BAV ot lineynykh poli-( -aminokislot) do blok-sopolimerov tipa A-V ili A-V-A i zvezdoobraznykh polimernykh kon`yugatov belkov i lizinovykh dendrimerov i ikh analogov - giperrazvetvlennykh poli-(lizinov). Osoboe vnimanie v monografii udelyaetsya strukture speyserov, svyazyvayushchikh BAV s polimernym nositelem. Pokazano, chto speysery opredelyayut kak aktivnost` kon`yugata, tak i ego sud`bu posle zaversheniya im biologicheskoy funktsii. Pravil`nyy vybor struktury speysera obespechivaet vysokuyu aktivnost` kon`yugata, bezproblemnoe razrushenie biodegradiruemoy chasti polimernogo kon`yugata i garantiruet vyvod iz organizma nedegradirumykh fragmentov kon`yugata. Monografiya rekomenduetsya spetsialistam, rabotayushchim v oblasti sinteza, izucheniya i ispol`zovaniya v meditsine, biotekhnologii i nanotekhnologii biodegradiruemykh polimernykh kon`yugatov BAV. ····· 103615147
für 61.20€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray V monografii podrobno proanalizirovano opisanie adsorbtsionnykh ravnovesiy na makro- i mikroporistykh adsorbentakh kak v ramkakh `metoda izbytkov Gibbsa`, tak i v ramkakh `metoda polnogo soderzhaniya`. V poslednem sluchae rassmotrenie provedeno na osnovanii razrabotannoy avtorom termodinamicheskoy teorii stekhiomericheskoy adsorbtsii individual`nykh veshchestv i binarnykh i mnogokomponentnykh rastvorov. Podrobno rassmotreny metody teoreticheskogo (apriornogo) rascheta adsorbtsionnykh ravnovesiy i opisanie i izoterm `absolyutnoy` i `izbytochnoy` adsorbtsii gazov, parov i komponentov binarnykh rastvorov neelektrolitov razlichnymi uravneniyami, poluchennymi v ramkakh fenomenologicheskikh, reshetochnykh i empiricheskikh modeley. Rassmotreny metody kolichestvennogo opisaniya izoterm adsorbtsii i topologicheskogo analiza supramolekulyarnykh struktur adsorbatov na mikroporistykh aktivnykh uglyakh metodom molekulyarnoy dinamiki. Na osnovanii sopostavleniya chislennogo i fizicheskogo eksperimenta dokazana vozmozhnost` ispol`zovaniya uravneniy teorii ob`emnogo zapolneniya mikropor (Dubinina- Radushkevicha, Dubinina-Astakhova), uravneniy reshetochnykh modeley i dr. pri sverkhkriticheskikh temperaturakh. ····· 103614856
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray This book reported the literature survey of the chemistry of enaminonitriles. The activity of enaminonitriles and their synthetic importance were investigated. Syntheses, reactions and the applications of enaminonitriles and good introduction about the literature survey of the inhibition of C-steel surface and inhibition in acid media were also investigated. Furthermore, the obtained results were discussed, 43 novel compounds were synthesized, the synthetic mechanisms were investigated and compounds were established by elemental analyses and spectral data. Antipyrines incorporating different heterocycles such as pyrazole, pyridine, pyrimidine, diazepine, and oxazocine were synthesized. This book evaluated the inhibition efficiency of three enaminonitriles in acid medium by three different modern techniques. The investigated compounds exhibited good antioxidant, anticancer and hemolysis activities. Finally, the experimental methods were included. ····· 103613757
····· lezzter Preis 61.20€ ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Catalytic pyrolysis has the potential of transforming used plastic and tyres into useful chemicals. Used plastic and Scrap tyres represent a major environmental problem. Catalytic Pyrolysis is an environmentally friendly process to transform used polymers into useful products likes gas, oil and pyrolytic carbon black. Tyre recycling has become a necessity because of the huge piles of tyres that represent a threat to the environment. The used tyres represent a source of energy and valuable chemical products. Waste tyres & plastic were pyrolysed catalytically in a batch reactor under atmospheric pressure. The objective of the present study was to convert waste plastic and used tyres catalytically at relatively low temperature as well as to derive oil in the boiling range of commercial fuel oil. ····· 103613558
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The present work has been focused on the mechanism of physical-chemical processes (abiotic) that promote as ultimate stage the biodegradation of full carbon backbone polymers, thus transforming these polymers in eco-compatible materials. In particular, the investigations undertaken in the present PhD thesis work was the evaluation of the rate of biodegradation of oxidized and degraded oxo-biodegradable polyolefin samples (PE, PP, PS) under aqueous, soil and compost conditions. Based on these criteria polyolefin (PE, PP and PS) film samples formulated with different pro-oxidant (type and content) based on transition metal organic salts able to promote oxidative degradation/biodegradation by abiotic and/or biotic actions have been ascertained into three tiers. Tier 1 Acceleration of samples aging in standard tests for both thermal and photo-oxidation processes and determination of the degree of abiotic degradation. Tier 2 Monitoring of the biodegradation of the pre-treated samples in respirometric apparatus. Tier 3 Assessment of interactions between polymeric materials and microbes and of any toxicity effect of the metabolized polymer fragments. ····· 103613486
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Chemical investigation on the constituents of the nudibranch Chromodoris willani collected at Zampa in Okinawa resulted in the isolation of two new compounds deoxymanoalide (1) and deoxysecomanoalide (2) and its prey sponge gave two known compounds manoalide (3) and secomanoalide (4). A new collection of the gorgonian Isis hippuris was obtained at Izena in Okinawa gave four new gorgosterols (8-11), along with four known members (12-15) that are highly functionalized with oxygen-containing substituents. A soft coral, Paraminabea sp., collected at Manza in Okinawa yielded one new steroid (19) and five known cholic acid type keto-steroids (20-24) possessing enone or dienone A-ring and known desmosterol (25). A sponge collected at Manza in Okinawa gave two new spongian-class diterpenes (27 and 28) together with two known compounds chromodorolides B (29) and C (30). The structures of all new compounds were elucidated on the basis of detailed spectroscopic analysis and chemical transformations. All compounds were evaluated with respect to various biological activities including cytotoxicity using NBT-T2 rat bladder epithelial cells, antimicrobial activity and PLA2 assay. ····· 103613421
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The impact of advances in nanotechnology is particularly relevant in biodiagnostics, where nanoparticles based assays have been developed for specific detection of bioanalytes of clinical interest. Gold nanoparticles show easily tuned physical properties, including unique optical properties, robustness, and high surface areas, making them ideal candidates for developing biomarker platforms. Modulation of these physicochemical properties can be easily achieved by adequate synthetic strategies and give gold nanoparticles advantages over conventional detection methods currently used in clinical diagnostics. The surface of gold nanoparticles can be tailored by ligand functionalization to selectively bind biomarkers. Simple and inexpensive methods based on these bio-nanoprobes are presently being expanded to clinical diagnosis as well. In a nutshell, nanoparticles hold great promise in the future of disease diagnostics. ····· 103613280
für 44.91€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray En la actualidad existe una apuesta constante del sector vitivinícola por buscar nuevas líneas de vinificación que permitan aumentar la calidad de los vinos y mejorar sus propiedades organolépticas. Entre ellas se ha puesto a punto una vinificación alternativa para la obtención de vinos dulces a partir de uvas tintas cultivadas en la zona de la D.O. Montilla-Moriles, cuyo elemento diferenciador es el secado controlado de las uvas en una cámara con temperatura constante y humedad controlada. En este estudio se recogen los resultados obtenidos durante un posterior envejecimiento acelerado y estabilización en botella de los vinos tintos dulces obtenidos con el nuevo sistema de vinificación. Al someter a estos vinos a un contacto con virutas de roble, se consigue en pocos días un cambio en su perfil sensorial, a la vez que se modifica ligeramente la composición química. Posteriormente, se estudia la evolución experimentada por estos vinos tras ser embotellados y almacenados durante un año. Durante esta última etapa ocurren cambios muy importantes en el color y composición fenólica de los vinos, que es necesario conocer y controlar para su comercialización. ····· 103613101
für 26.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Una de las ciudades más contaminadas del mundo es la Zona Metropolitana de la Ciudad de México, con más de 20 millones de habitantes, aproximadamente 3 millones de vehículos y más de 4000 industrias. Se realizó un estudio epidemiológico en el Suroeste de la ciudad de 1993 a 1995, el cual concluyó que al aumentar la concentración en 10 ppm de las PM2,5 se incrementaba el 1.4% de la mortandad en la población. La emisión de contaminantes generados por las actividades antropogénicas afecta la calidad del aire la cual incide en la salud humana. Monitorear la calidad del aire es importante para conocer los niveles de contaminación a los que está expuesta la población. En el presente trabajo monitoreo y correlaciono la masa de las partículas respirables PM2.5 con la composición química de los aerosoles ácidos en la Zona Noroeste de la Cd. de México, la cual alberga una importante zona industrial. ····· 103613004
für 35.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray La heterogeneización de catalizadores tipo Jacobsen ha sido un tema de intensa investigación, ya que esto permitiría la implementación de procesos de oxidación viables a nivel industrial. En este libro, se reporta un nuevo método para conducir la epoxidacón heterogénea de varias olefinas, utilizando el catalizador de Jacobsen y dimetildioxirano (DMD) generado in situ como agente oxidante. En este método, el catalizador inicialmente homogéneo, se segrega hacia una fase sólida cuando la fuente de oxígeno (KHSO5, Oxone® el cual origina DMD por reacción con acetona) se adiciona lentamente y el pH de la mezcla de reacción se mantiene en un rango entre 8.0-8.5. Esto permitió separar el catalizador y disponerlo para su posterior reuso. Para efectos de comparación, se presenta los resultados obtenidos cuando el catalizador es inmovilizado sobre aluminosílicatos mesoporosos (Al-MCM-41), silicatos mesoporosos (MCM-41) y amorfos. ····· 103612852· 1 · ::::: · 19 ·· 20 ·· 21 ·· 22 ·· 23 ·· 24 ·· 25 · ::::: · 26 ·
Affiliate Marketing
AdHoc MeldungenAffiliate & PublisherAdvertiser & MerchantAcademyAntwortenArtikelsucheAdventskalender
AffilitivProduktdatenPreisvergleich
