für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Reactions were carried out on Schiff bases derived from condensation of 2-hydroxynaphthaldehyde or salicylaldehyde with 2-aminophenol and 8-aminoquinoline. The Schiff bases were reacted with Ni(II) and Cu(II) metal ions in presence of diamines as 2,2`-dipyridyl or 1,10-phenathroline or S-donor anion as thiophenolate. The used Schiff bases were N-salicylidene-8-aminoquinoline (HQS), N-2-hydroxynaphthalidene-8-aminoquinoline (HQN), N-2-hydroxynaphthalidene-2-aminophenol (H2PN) and N-salicylidene-2-aminophenol (H2PS). The complexes were found to have the general formulas [M(SB)(N-N)] , [M(SB)(N-N)AcO].XH2O and [M(QN)(SPh)], where M is Cu(II) or Ni(II), SB is the Schiff base and N-N is 2,2-`dipyridyl or 1,10-phenathroline. All complexes were characterized by elemental analysis, infrared spectroscopy, UV-visible spectroscopy, electrical conductivity and magnetic susceptibility measurements. ····· 1036189323
für 61.20€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Rice is a cereal foodstuff which forms an important part of the diet of many people worldwide. Domesticated rice comprises two species of food crops in the Oryza genus of the Poaceae (`true grass`) family, Oryza sativa and Oryza glaberrima (Crawford et al., 1998). Rice is grown as a monocarpic annual plant, although in tropical areas it can survive as a perennial and can produce a ratoon crop and survive for up to 20 years (International Rice Research Institute 2008). Smith et al (1998) reported that Rice provides more than one fifth of the calories consumed worldwide by humans. In the selected local area rice is used as a full suplement for diet source and the majority of population depends on rice as food material. The climate is fully fertile for its production and is also consider as a main souce of income. ····· 1036189010
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray 2-5-disubstituted 1,3,4-oxadiazoles constitute a unique class of nitrogen and oxygen containing 5-membered hetero cycles. During the past years considerable evidence also accumulate to demonstrate the efficacy of 1,3,4-oxadiazoles including anti-malarial, anti-bacterial, anti-inflammatory and other biological activities. In an attempt for the enhancement of biological activity incorporation of 1,3,4-oxadiazoles was made with furan moiety. The main objective was to synthesize various 2,5-disubstituted-1,3,4-oxadiazoles, which were characterized by different spectroscopic techniques (IR,NMR,MASS). Analysis of spectral data of all the compounds revealed the successful formation of Different derivatives derived from 2,5-disubstituted-1,3,4-oxadiazoles and antibacterial and anti-inflammatory activities were evaluated. ····· 1036188920
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray An important feature of learning a subject is to be able to slove the problems that arise in that study. For a proper understanding of a scientific text and an appreciation for the formulas and the propositions exposed in it, it is necessary to solve the problems in the text by oneself. This book is written to help the students of chemistry in this task.The collection of chemistry problems from various sources and their solutions given here should be of great use to the final year secondary school and the pre-university students studying chemistry(A-level,Baccalaureate,CBSE etc.) Importantly,it can be fruitfully used by students appearing for competitive entrance examinations for the Engineeing and the Medical schools in the Indian subcontinent and the Gulf countries. ····· 1036188910
für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray My research work is based on organic synthesis of some hetero cyclic compounds, and then conform by varios spectral data like NMR, IR, Mass and primary conform by TLC method. i have been sythesised triazine combine with bis chloro ethyl amine derivative, which synthesised by various reagent and various condition of reaction. after synthesis all compunds was subjected to find their physical data like melting/boiling point, percentage of nitrogen, carbon, hydrogen. and then further antimicrobial screening and compare with known stadard drugs like ampicillin, chloramphenicol, norfloxacin and greseofulvin at various concertration, some of my compunds shows moderate antimicrobial activity. many number of my synthsised compounds are selected for Anti-cancer and Anti-HIV screening at national cancer institute at USA. ····· 1036188693
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Biotextiles have got considerable interest in the field of human healthcare technology. These materials have been used in the form of monofilament, multifilament, woven and nonwoven structures. Their performance depends on biocompatibility and biostability with cells and biological fluids. Textile materials has good mechanical properties but do not have good cellular interaction. Therefore, it is necessary to modify these materials to make it bioreceptive and biocompatible for their application as biomaterials. The key requirement towards modification is that it should acquire specific functional groups where biomolecules can be immobilized. The modification of materials has been carried out by different methods involving chemical hydrolysis, UV, plasma, ozone, and graft polymerization to introduce various functional groups, such as carboxylic acid, sulphonic acid, amide, amine, acrylate, pyrrolidone and glycol. This work is intended to modify poly(ethylene terephthalate) (PET) knittings by the radiation-induced graft polymerization to immobilize collagen for the adherence and growth of 3T3 mouse fibroblast and human mesenchymal stem cells (hMSCs). ····· 1036188682
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Though the serious health problems to human beings due to excessive intake of fluoride mainly through Potable water is a well known fact, suitable and cost effective solution is needed. Activated carbon proved to be the most effective adsorbent for various pollutants in water including fluoride. But Commercial activated carbon is an expensive one. So activated carbons prepared from bio-waste materials, viz., Phaseolus trilobus, Leucena leucocephala and Casuarina and were collectively named as Kaza s carbons. The suface analysis of these carbons is carried out by FT-IR, XRD, SEM and EDAX along with physico-chemical analysis. These carbons are having good surface characteristics and are applied in defluridation of synthetic fluoride solution as well as for real water samples. The adsorption data is modeled with Freundilich, Langmuir, Temkin and Dubinin-Radushkevich isotherms. Five kinetic models, viz., pseudo first-order, pseudo second-order, Weber and Morris intraparticle diffusion model, Bangham s pore diffusion model and Elovich equations are used to study the Adsorption process. Defluoridation is successful in water to bring the normal level of fluoride content. ····· 1036188642
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray In recognition of the continuous stress on the Earths freshwater resources, the potable reuse has emerged to gaining widespread acceptance as a sustainable alternative to traditional water supply. However, present wastewater treatment plants are not designed to treat the different array of complex and trace chemicals found in reclaimed wastewater that threaten consumers health. Among the trace elements of greatest concern is lipo-polysaccharide endotoxin. Associated with biological reactions, it is a constituent of the outer membrane of gram-negative bacteria and is uncontrollable at the source. Meanwhile, several studies have revealed that reclaimed wastewater toxicity has been linked to the existence of the LPS endotoxin in treated water. As such, gaining insight into the control and fate of endotoxin during wastewater reclamation a topic that poses serious challenges to water reuse experts is of great importance. The latest studies, which looked at different aspects of the fate and control of endotoxin during wastewater reclamation, filled in many of the knowledge gaps on the topic. This book presents the latest researches on endotoxin during wastewater reclamation. ····· 1036188615
für 61.20€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Polyimide (PI) based on an aromatic backbone, is known as a high performance polymer. However its presenting extreme glass transition temperature and often insoluble in most organic solvents in fully imidized form. Various techniques have been extensively studied to overcome serious processing difficulties including incorporating flexible segmented or manipulate bulky side group into a rigid PI backbone and introduce an inorganic segment network into the PI matrix. However, the synthesis of PI containing silicone segments implanted through copolymerization and Sol-gel techniques have not been studied synergetic before and only published in separated paper. Recognising the importance of understanding the diversity of the nature of PI derived from the same monomer, it should be very interesting to systematically study two different methods, for obtaining an optimal performance of PI. The roles of silicone segment on the chemical stability, thermal, optical and electrical properties of PI systems were analyzed and structure properties relationship has been studied. Further this knowledge will be useful for the investigation to distinguish the properties of a PI system. ····· 1036188463
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The composition of fatty acids in selected tissues of two populations of cod and three redfish species was determined by the fatty acid profile method: a chemometric method, consisting of methanolysis, gas chromatography of the resulting fatty acid methyl esters and multivariate statistical treatment of the analytical data. The two reared stocks of cod from the Faroe Bank and the Faroe Plateau had significantly different fatty acid profiles in total lipids and in phosphatidylethanolamine and phosphatidylcholine from heart tissue. This difference is expected to be genetic and free of biotic and abiotic impacts on the fatty acid profiles. The three species of redfish from waters off the Faroe Islands and Norway had significantly different fatty acid profiles in selected tissues. The fatty acid profiles appear to be species specific. The mutual relationship between Sebastes marinus and S. mentella is closer than the relationship between either of them and S. viviparus. Analysis of the fatty acid profile in the heart tissue of S. mentella from eleven locations has revealed a stock-structure, comprising four separate stocks of Sebastes mentella in the North Atlantic. ····· 1036188437
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Master Thesis in inorganic chemistry , it include the Synthesis and Characterization of Cu(II), Zn(II), Co(II), Ni(II) and Fe(II) metal ions Complexes of Thiocarbohydrazone Schiff Bases. Thiocarbohydrazones Schiff base complexes were prepared from the reaction of bis (furfural) thiocarbohydrazone(FU), bis (pyrrole-2- carboxaldehyde) thiocarbohydrazone(PY), bis(thiophen-2-aldehyde) thiocarbohydrazone(TH) and bis(piperonaldeyde)thiocarbohydrazone (PI) with Cu(II), Zn(II), Co(II), Ni(II) and Fe(II) metal ions. The Schiff bases were prepared from the reaction of thiocarbohydrazide with furfural, pyrrole-2- carboxyaldehde, thiophene-2-aldehyde and pipronaldehyde. All complexes were characterized by elemental analysis, IR spectroscopy, UV-visible spectroscopy, electrical conductivity and magnetic susceptibility measurements. ····· 1036188417
für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Environment plays a vital role in the life of all living organisms present on Earth. A healthy environment is necessary for the survival of living beings. Soil is one of the most important part of our environment. It acts as a growth medium for producers so it is the base of our food chain. It also provides a best sink for all pollution causing agents. Heavy metals are the non-degradable pollution causing agents. This book provides information on heavy metals (Cu, Cd, Cr, Pb, Ni and Fe), their industrial uses, sources in soil and their toxic effects. Chapter 1 provides the information about soil and the technique used for the determination of heavy metals by atomic absorption spectrophotometer and well as the literature review of the previously reported results. Chapter 2 gives information on experiment. Results and discussions have been described in chapter 3. Soil samples, from surface and depth, from different sites of Lahore were collected and analyzed for heavy metals. Concentration of Fe was found highest in all soil samples while the level of Cd was found lowest. Levels of Pb, Cu and Cr were found to be highest in high traffic density areas as compared to residential areas. ····· 1036188381
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Controlled drug release enhances the safety, efficacy and reliability of drug therapy. The number of polymers suitable for the controlled release of viable therapeutics is quite limited due to inherent toxicity or lack of certain properties such as biodegradability. Chitosan, a non-toxic and biodegradable polymer was utilized as an ideal base polymer for the development of a series of new smart hydrogels for the use in the site-specific delivery of drugs to the gastrointestinal tract. The chitosan-based smart hydrogels were obtained particularly via three main approaches. The first approach was the incorporation of chitosan into interpenetrating networks with either a hydrophilic polymer or with hydrophilic monomers treated to bring about in situ copolymerization in presence of a crosslinking agent. The second approach was the grafting of suitable hydrophilic vinyl monomers onto chitosan followed by crosslinking. In the third strategy, chitosan was modified in such a fashion that the resulting smart hydrogels could be tailored for utilization in intestine targeted delivery of peptide and protein drugs with a potential protection of the drugs from the harsh acidity of the stomach. ····· 1036188355
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray This book describes several new processes using bismuth(III) reagents and catalysts, with application to steroid chemistry. Two processes for the nucleophilic ring opening of epoxysteroids are presented: one describes the Ritter reaction to afford vic-N-acylamino-hydroxy compounds, whereas the other show that bismuth(III) salts can act both as nucleophiles and reaction promoters, to obtain -substituted-hydroxy steroids. The bismuth(III) salt-catalyzed rearrangement of epoxysteroids is described as a strategy to obtain steroids bearing abnormal ring fusions, inverted configuration at bridgehead stereocenters and methyl groups out of their typical positions, leading to olefinic 19-nor, 18,19-dinor- or 18-norsteroids. The bismuth(III) triflate-catalyzed cleavage of the C17-side chain of corticosteroid allows the easy preparation of highly functionalized 17-ketosteroids. Moreover, full structural elucidation of all the obtained compounds is provided and largely discussed. A general introduction provides the background knowledge to this work. The concept of pharmaceutical green chemistry is discussed in the light of its integration with chemical process within pharmaceutical chemistry. ····· 1036188282
····· lezzter Preis 68.00€ ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The chemistry of hypervalent compounds has received much attention both from organic and inorganic chemists and a rapid development in this area has been noted in the last 25 years. The aim of this research was the synthesis and structural characterization, in solution and in solid state, of new organobismuth compounds with ligands containing nitrogen atom(s) able to coordinate intramolecularly through N--Bi interactions, ligands designated as (C,N) or (N,C,N). General aspect of elemental bismuth and its chemistry are presented in Chapter 1. The second chapter describes structural and bonding aspects necessary to understand solution and solid state behavior of hypervalent organobismuth compounds. In the third chapter a review of all known organobismuth compounds relevant to the subject of the thesis are presented, based on searches in Cambridge Structural Database and Science Finder Database up to December 2007. The fourth and main chapter contains the original results of this work. In the last chapter, detailed experimental procedures are given. Two appendices containing experimental X-ray diffraction data and NMR spectra are given at the end of this work. ····· 1036188029
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray A series of hybrid mesoporous materials were synthesised through the functionalisation of pre-formed porous zirconium titanium oxide phases using a range of commercially available phosphonic acids. A fundamental study on the hydrolytic stability and chemical durability of these materials in aqueous acidic conditions were conducted. Polyphosphonic acids have been recognised as the most stable surface species. With potential use of these materials for the nuclear industry in view, a study of the irradiation stability of the un-functionalised zirconium titanium oxides were conducted. Changes to the structural morphology were found from physical characterisation techniques evidencing the overall decrease in surface area, pore volume and mass density with increased doses. A similar irradiation study was also carried out for functionalised zirconium titanium oxides. Structural characterisation revealed a drop in surface area, pore diameter and pore volume, along with a rise in mass density after exposure to high levels of radiation. A loss of functionalised phosphonate molecules was also observed by thermal analysis under the same conditions. ····· 1036188016
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Study of the quality of commercial bottled mineral waters in Malaysia is a study to investigate the water quality constituents in the most common commercial bottled drinking waters in Malaysia. There had been lack of reports on analysis of drinking bottled water in Malaysia, mostly were dispersed and not fully documented. Thirteen brands of bottled drinking waters consisting of both purified and mineral types were collected from different area in Kuala Lumpur and evaluated for their fitting for human consumption. The water quality constituents analyzed include alkalinity, chloride, conductivity, fluoride, total hardness, Al, Cd, Co, Cu, Mn, Pb, Zn, nitrate, pH, phosphorus, sulphate, total dissolved solids and turbidity. The results acquired were compared with WHO s Guideline for Drinking Water Quality. The discoveries made by this study also shown that most commercial bottled mineral waters in Malaysia had not meet WHO`s Guideline for Drinking Water Quality, although they were stated otherwise. There were also slight contrast in quality of the bottled mineral waters and purified bottled waters for those who concerned about their health and the consumption of bottled water. ····· 1036187998
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray To produce a microsystem with favorable performance characteristics for genetic-based analyses, several key operational elements must be strategically chosen, including device substrate material, temperature control, fluidic control and reaction product readout. The advantages afforded by fully integrated microfluidic systems to enable challenging applications, such as single-copy DNA sequencing, single-cell gene expression analysis, pathogen detection, and forensic DNA analysis in formats that provide high throughput and point-of-analysis capabilities must be addressed by the researcher. This book focus on discussion on microfluidic systems that are composed of two or more microdevices directed toward DNA analyses. The discussions primarily focus on the integration of various processing steps with µ-capillary electrophoresis (µCE) with discoveries that have led to the development of fully autonomous and functional integrated systems for genome processing that can supply sample in / answer out capabilities. ····· 1036187996
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray One of the most versatile routes to the cyclic structures of many different sizes is through an important class of synthetic reactions called cycloadditions. In the book the detailed study and synthesis of (3+2) cycloaddition reactions of various azomethine N oxides, (3+2),(5+2) cycloaddition reactions of various nitrile oxides, (2+2) cycloaddition reactions of various azomethines through Reformatsky reaction have been carried out. These reactions lead to variety of variously substituted heterocycles like isoxazole -4, 6-diones, oxazepin 1, 3-diones, isoxazoline-4, 6 diones, azetidinones and also diaryl-N- -cyano amines. These have been identified by various characterization techniques like infrared, proton magnetic resonance spectra, mass spectra and elemental analysis. ····· 1036187758
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Polythene Pollution: An environmental disaster is a book for under graduate and post graduate students, researchers and other involved in the study of polythene pollution. The book is comprised of the including chapters of: Different types of plastic Disadvantage of polythene bag Statutes of the Environmental Act Innovation of recycling Anti polythene campaign Objective and methodology of the study Research findings Questionnaire (sample) Summary and collusions Recommendations And Photograph of Anti polythene campaign ····· 1036187719
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Prompted by the need of non-petroleum-based fuels, coal research has reemerged to center stage after a length dormant period. Low-rank coal derived humic acid research, in particular, has gained considerable momentum because of its close connection to various industrial utilizations in field of textile printing and agriculture. Spectroscopic and other advanced instrumental techniques are currently producing prodigious information about this supra-molecular structure, while modeling efforts are breaking new ground in sorting out chemical and physical phenomena to provide fundamental although simple description. This monograph was written to organize recent detailed research data obtained from pyrolysis and solid 13C NMR spectroscopy techniques for low-rank derived humic acid and its valuable industrial derivatives for utilization in field of textile and agriculture. With this orientation the monograph should be useful to chemists, engineers and graduate students with interest in coal derived chemicals research. I would like to thank Dr. Jiri Kucerik and Dr. Marc Marshall for helping while preparing this valuable manuscript. ····· 1036187666
für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Some of the platinum complexes such as Cisplatin, carboplatin, and oxaliplatin are the FDA-approved members of the platinum anticancer drug family. Cisplatin, as one of the leading metal-based drugs, is widely used in the treatment of cancer. Significant side effects and drug resistance, however, have limited its clinical applications. These compounds induce apoptosis in tumor cells by binding to nuclear DNA, forming a variety of structural adducts and triggering cellular responses. Advances in biocoordination chemistry are crucial for improving the design of compounds to reduce toxic side effects and understand their mechanisms of action. In this report we present the development of platinum complexes such as platinum(II)-amine complexes, platinum(IV)-amine complexes, multi nuclear platinum complexes and some other platinum complexes as anti-cancer agents, with the purpose of providing an insight into the benefits of, and reasons for, their success. ····· 1036187664
für 61.20€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray This study investigated Cu(II) based anti-inflammatory agents for inflammation alleviation due to Rheumatoid Arthritis. Four copper chelating agents [555-N], [H(555)-N], [H2(5555)-N] and [H2(556)-N] were synthesized and used for in vitro investigations to determine their formation constants with Cu(II), Zn(II), Ca(II) and Ni(II). The stability for the Cu(II) solution species were [555-N] [H(555)-N] [H2(556)-N] [H2(5555)-N] with significant Jahn-Teller distortion for the MLH-1 and MLH-2 species. Percutaneous skin absorption estimates for Cu(II) complexes indicated encouraging trans-dermal absorption, though were poor in mimicking the Cu-Zn-SOD enzyme. Speciation modelling of Cu(II) suggested significant mobilization of Cu(II) by [555-N] and [H(555)-N] in vivo with insignificant interference from Zn(II) and Ca(II). The in vivo verification of the modelling results through animal experiments showed significant biological half life of the Cu(II) complexes. Overall, in vitro and in vivo evaluations showed potential of achieving exogenous trans-dermal administration, subsequent endogenous mobilization and retention of therapeutic effect of Cu(II) at sites of inflammation. ····· 1036187511
für 61.20€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The research in this book is focused on the application of the concept of polymer-drug conjugation to prepare conjugates. These conjugates acts as pro-drugs from which bioactive agents are released to predestined biological environment. The macromolecular carriers used are biodegradable, non-toxic, easily conveyed to the target cells or tissues, with different solubilizing groups to ensure rapid dissipation of the conjugate in the central circulation system. The polymer-drug connective link is to provide delayed and controlled drug release thereby ensuring restriction of drug serum concentration and reduction of organ toxicity. This book elaborates on the conjugation of 4- and 8-aminoquinolines to polymers to overcome the drug resistance associated with the currently used aminoquinolines. Presently, some antimalarial drugs have been found to be anti-carcinogenic and have ability to inhibit tumor development and as such, this book is also focused on the co-conjugation of an anticancer and an antimalarial agent on a single carrier, whereby the antimalarial is expected to serve as potentiating and resistance reducing agent. ····· 1036187273· 1 · ::::: · 14 ·· 15 ·· 16 ·· 17 ·· 18 ·· 19 ·· 20 · ::::: · 26 ·
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