für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray In recent years, the courses in chemistry have been considered extremely important for students desirous of pursuing basic science as well as technical education. Taking into consideration this trend, this book has been specially written for students who are interested in investigatory and innovative projects in chemistry. The unique feature of this book is that the basic, theory, procedure and conclusions for each project are given in comprehensive manner. In all 51 projects are included in this book from all the branches of chemistry viz. inorganic, organic, physical, analytical and general chemistry.some of them are: Antacid effectiveness analysis, Study of tea chemistry, study the foaming capacity of soaps, Study of constituents of brass and bronze, Preparation of potash alum from scrap aluminum, Extraction of essential oil from aniseed, preparation of pigments and poster paints using chemicals and reagents, Analysis of calcium, phosphate, chloride, magnesium and iron from bone ash, To Study the Setting of Cement, Comparative study and qualitative analysis of cold drinks, preparation of cuprammonium rayon threads from filter paper, Analysis of talcum powder etc. ····· 10361132258
für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray An intense research activity concentrated in the last decade has demonstrated that supercritical carbon dioxide can be used as an attractive alternative for the aqueous and organic solvents.This book presents an overview of the application of supercritical carbon dioxide, mainly focused on the synthesis of polymers such as vinyl polymers, conducting polymers, and biodegradable polymers. In addition, this book addresses the challenges for preparation of the polymeric nanoparticles by RESS and RESOLV methods. A small portion was also dedicated to carbon dioxide aided drug delivery and molecular encapsulation of drugs into different host materials. I believe that this book should be very helpful for scientists involved in multi-disciplinary research topics and industrial communities who are interested in the class of conducting polymers and biopolymers for drug delivery, and also the particle engineering with carbon dioxide for a wide range of applications. ····· 10361132147
für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray This book describes the recent development in chemical sciences.Chemistry has become an interdiscliplinary area in the recent times.This has been demonstrated by the rapid advancement both in theoretical as well as applied chemistry. The book titled `Modern Aspect in Chemistry` consists of four chapters. The first chapter is devoted to nanomaterials in terms of benefits and potential risks. The second chapter is devoted to self-assembled monolayer of thiocholesterol on gold. The third chapter describes about DNA biosensors and biochips. The final chapter illustrates the various computational techniques used in theoretical chemistry. ····· 10361131917
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray As given by the current ASTM Standard Test Methods for chemical analysis of hydraulic cement(C114), strontium, usually present in Portland cement as a minor constituent,was precipitated with calcium as the oxalate and was subsequently titrated and calculated as CaO, or alternatively correction of CaO for SrO was made,if the SrO content is known. Many analysts and ASTM members have expressed the opinion that(C 114) does not make the distinction between CaO and SrO and this may direct the analyst to not correct the CaO for SrO.Accordingly, the development of a new, sensitive and accurate method for the determination of Sr as a minor constituent in cement is of upmost importance.The main problem faced in the determination of SrO and/or MgO content of cement is the interference from excessive amounts of CaO.Derivative spectrophotometry opens up possibilities for the determination of metal ions in their binary and ternary mixtures, through their complexes with the same organic ligands.In the present work,new spectrophotometric procedures for simultaneous determination of SrO, MgO and CaO content of Portland cement, using derivative ratio spectra-zero crossing technique, are developed. ····· 10361131886
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Biodiesel, a new energy resource which can be obtained from plant oil or animal fats is our new hope in replacement of petroleum. Most of the petroleum sources are running out faster than what experts would have been estimated. Hence, scientists as well as businessman have been working around new resources dilligently. Sunflower oil, ccanola oil, algae, used cooking oil and etc have been used to produce biodiesel. It is efficient to use sunflower oil for biodiesel conversion in Europe since it is planted in vast amount there. However research has shown that it is difficult to control production of biodiesel from algae due to various reasons. Palm tree or in Malay Pokok Kelapa Sawit is found vastly in Asia Pacific especially in Malaysia and thus inevitably various research and studies have been conducted in converting palm oil or palm kernel oil to biodiesel. Moving from that, its properties can be modified in order to get better biodiesel with higher efficiency. In this research work, the kinetic of the transesterification of RBD palm kernel oil was done. ····· 10361131878
für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Heavy metals such as lead are widely used in toys as stabilizers to bind any free chlorine that might be formed during processing or degradation. Lead is also used in various pigments that color plastic. Heavy metals do not bind to the plastic, existing as a freely mobile and leachable phase in the plastic. As a consequence, lead and other heavy metals are continuously released from toys over time. Contact and pressure, such as that applied during teething or play by children, can increase the rate at which these chemicals leach from the plastic. This is of great concern as heavy metals are known to cause a number of hazards. In the European Union (EU), legislation is in place to control the use of certain toxic heavy metals in toys and other children s products. In Nigeria, there is no legislation presently for this sector. A total number of 51 toys manufactured from different countries were purchased and studied to determine the level of lead, cadmium, chromium and nickel in the plastic components which was digested with concentrated HNO3 (CPSC-CH-E1002-08 method) and analyzed using Atomic Absorption Spectrophotometer (AAS) to determine the levels of heavy metal conc ····· 10361131833
für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray This book, which is characterized by many novel interesting and useful features of approach and presentation. The objectives are listed at the beginning of chapter. The contents of each chapter are presented in a clear, accurate and balance view of inorganic chemistry. This book not only fulfils the requirements of the new synthesis but also caters to the students who would like to delve deeper into the subject. It convinces the researchers that there is more to inorganic chemistry than equations! ····· 10361131823
für 53.91€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Over the last 60 years, polyolefin-based plastics have considerably been developed to become the most used materials today. However, they are made from non renewable fossil resources and pose an environmental problem (waste storage, pollution ). As a consequence, biodegradable and biocompatible polymers may be a viable alternative to petrochemical-based plastics. As a result, biodegradable aliphatic polyesters and polycarbonates have received increasing attention over the last years. They can be obtained by the ring-opening polymerization (ROP)of cyclic monomers. In the present book, the synthesis of well-defined and ligand-supported group 13 complexes for use as ROP initiators of cyclic esters and carbonates is described. To this purpose, novel salen- and N,O,N-type ligands have been readily synthesized and coordinated onto group 13 metal centers (Al, Ga). All the complexes have been structurally characterized and successfully tested as initiators in the ROP of rac-lactide, e-caprolactone and trimethylene carbonate, yielding the corresponding biodegradable polyesters/carbonates. This work should be useful to professionals in organometallic and polymer chemistry/catalysis. ····· 10361119689
für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The dissolution of chitosan in ionic liquids wassuccessfully accomplished. Benzoylation andphthalation of chitosan in homogeneous conditions wasalso achieved.By modifying the chitosan withdifferent reagents, new desired chemical and physicalproperties can be induced which will enlarge thefield of the potential applications. Blends of chitosan and cellulose were successfullyprepared using BMIMAc as a common solvent.Therheological measurements of the polymeric solutionsindicated the formation of a complex between chitosanand cellulose molecules. Films prepared from thepolymeric solutions were investigated by means ofFT-IR, TGA, X-ray diffraction and SEM measurements.The interest in obtaining films from blends ofchitosan and cellulose is owed to skin tissueregeneration and accelerate healing of wounds effectcreated by the presence of chitosan that hasdistinctive biomedical properties when used aswound-dressing materials. ····· 10361119198
für 61.20€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Spectrophotometric methods of analysis are an excellent tool, which are very widely used for determination of wide kinds of materials. These techniques are the most commonly used methods for metal analysis. Achievement of high accuracy and precision coupled with the cost effectiveness is the most important advantage of visual spectrophotometry. The challenge in this field of research is the development of newer reagents, which are comparatively stable. The investigation was aimed at establishing the complexation equilibria that exist in solution and at determining the basic characteristics of the complexes formed in solution. The proposed methods have been successfully applied to the determination of aluminium(III), manganese(II), iron(III), iron(II), nickel(II) and copper(II)in aluminium alloys, nonferrous alloy and multivitamins with minerals. Finally I tried to summarize in this thesis all the used equations for Normal and Derivative methods for spectrophotometric determination of any solute whatever metal ion or a drug . ····· 10361118761
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray This endeavor proposes a comprehensive quality standard for Indian wine in harmony with different international standards. Along with the routine parameters it also recommends monitoring of the compounds characteristic to specific grape varieties safety assessment by screening for the residues of spoilage compounds and variety of contaminants that might find their place in wine from direct and indirect sources. Thus a holistic quality assessment will be possible, which will improve the image of Indian wine in the international arena and establish its own footprint in quality. ····· 10361118736
für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray This work is devoted to investigate the tensile properties of the newly developed Sn 9Zn xBi (1, and 4 wt.%) lead free solder alloys at different strain rates and temperatures to compare the results with the eutectic Sn 9Zn. also, the investigation of creep characteristics at different stresses and temperatures for selected lead-free solder alloys are presented. The microstructure and the thermal properties of these alloys were also thoroughly investigated and further, to determine the effect of Bi addition on promoting the properties of Sn Zn alloys. ····· 10361118671
für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Chitin is a naturally abundant polysaccharide and the supporting material of crustaceans (such as crabs, shrimps and cuttlefish), insects, and fungi. Chitin is the second most abundant natural polymer after cellulose and estimated to be produced annually almost as much as 10 billion tons. It is a highly insoluble material resembling cellulose in its solubility and low chemical reactivity.Chitosan is the modified N-deacetylated derivative of chitin. Recently, much attention has been paid to chitosan as a potential polysaccharide resource. It has become of great interest since it is inexhaustible, and also as a new functional material of high potential in various fields and recent progress in chitin and chitosan chemistry is quite noteworthy. Chitosan is obtained by deacetylation of chitin using strong alkali solutions. Both polymers are biodegradable, biocompatible and have many biological, biomedical, agriculture and technical applications.The potential applications of chitosan and chitin can be extremely enlarged by conducting chemical modifications using the OH and the NH2 groups. Examples of these modifications are acylation, alkylation, carboxymethylation and grafting. ····· 10361118663
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray This is a book for graduate students and researchers who wish to learn about carbon nanotubes and engage in the research and development of carbon anotubes and their applications in various fields.The carbon nanotubes were considered to be one of the most potential nanomaterials in this century. The field has recieved a considerable attention and is achieving continuos progresses in both research and industrial applications.The book includes a brief introduction on carbon nanotubes. But it mainly focuses on aligned carbon nanotubes. The synthesis and microwave absorption properties of aligned carbon nanotubes were investigated in the book. The all datas on aligned carbon nanotubes were obtained from a long time investigation in my group in past a dozen years. I hope the book can become a useful handbook for students and researchers who is engaging in studies and development of carbon nanotubes or will be in the field in the near future. ····· 10361118560
····· lezzter Preis 53.10€ ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray This book focuses on the characteristics of ZnO films fabricated by AP-MOCVD. ZnO shows high optical transmittance (greater than 85%) and electrical conductivity (resistivity about 10-4 -cm) for the transparent electrode. Particularly, compared to ITO, the material resource of ZnO is ample and no after-use worry concerned with the environmental protection is required. So this thesis has completed that the characterizations of undoped, n- and p-type ZnO semiconductors fabricated by AP-MOCVD. ····· 10361118516
für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Recent advances in mobile telecommunications and satellite broadcasting have created the need for new frequency channels. This fact is stimulating the progress in microwave integrated-circuit technology. The miniaturization and optimization of such circuits create demands for new components, which have to be compact, reliable and of low cost. Microwave dielectric ceramics represent such a group of components. The existing applications of the sillenites, in particular on B12SiO20 (BSO), are mainly in the fields of electro-optics, acoustics and piezoelectics. However, with the discovery of the BSO microwave dielectric properties, a potential application of this material as a dielectric in electronics technology has been considered. Therefore, the scientific work of this monograph is focused on the preparation of BSO thin films using the sol-gel method in order to follow the miniaturization demands for electronic devices. The monograph covers topics from basic sol-gel theory to its application in multi-component thin-film systems. Areas in which particular interest is concentrated include acid sol-gel chemistry, the influence of additives in sol-gel thin-film formation, the control ····· 10361118427
····· lezzter Preis 71.10€ ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Major drawbacks associated with the use of natural fibres as reinforcement in polymers include the poor wetting and the very weak interface which commonly occur between the fibres and most of the polymers used as matrices. Better interfaces can, however, be obtained by modifying the fibres by physical or chemical treatments. With the aim of a better understanding, this research focused on fundamental issues concerning the behaviour of the industrial hemp fibre reinforced polylactide (PLA) and unsaturated polyester (UPE) composites and the underlying mechanisms controlling these. This work investigated the effects of interaction of the materials (fibre and matrix) and the change in chemistry, morphology, and stress transfer that they impart on the hemp fibre reinforced PLA and UPE composites. ····· 10361118410
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray This work is all about producing bioethanol as an alternative fuel from lignocellulosic biomass. Lignocellulosic biomass used here is saccharum spontaneum a hardy weed prevalent in all over india and subtropical climate with little or no economic value. Microorganism used here is Pichia stipitis a yeast that can degrade both hexoses and pentoses efficiently. This work is novel in its approach of using a different substrate and an efficient microbe. ····· 10361118390
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Uncertainties on the effective advantages of biofuels over fossil fuels came forward in 2007-2008 have contributed in rising the food prices.EU seems to be so trustful in the future of biofuels insomuch as in 2009 it reformulates a new directive for biofuels adoption and despite the poor performance reached so far by MSs it sets more ambitious objectives to reach within 2020. At the present, biofuels promotion represent a huge cost for MSs and its benefits can be appreciated only in the long run.At the present biofuels promotion represent a huge cost for MSs and its benefits can be appreciated only in the long run. So MSs should trust the EC about the profitability that they will be able to gain from the biofuel promotion. But year by year MSs trust is jeopardized by the even more realistic electric car diffusion. The consequence would be that MSs do not know if it will be more profitable invest on biofuels or electric car. The final aim of this thesis is to provide recommendations that Mss and the EC should follow in order to improve biofuels adoption. ····· 10361118314
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray A mathematical model that expresses total trihalomethane (TTHM) concentration in terms of initial chlorine concentration, total organic carbon, bromide ion concentration, contact time, and pH is developed for Zai water treatment plant which supplies water to Jabal Amman. Laboratory studies of THMs formation upon chlorination and bromide ion addition at different points of Zai treatment plant were performed.Results showed an increase in THMs concentration upon increasing contact time and chlorine dose. TTHM in the effluent water from Zai treatment plant ranged from 22 ppb to 63 ppb these values may be attributed to the low contact time and chlorine dose. Water samples taken from Jabal Amman gave TTHM in the range of 86 ppb to 181 ppb these high values are due to long contact times, and rising temperatures.Predicted TTHM concentrations were compared to actual TTHM concentrations measured during the sampling program. Results showed that there is good agreement between measured and calculated TTHM concentrations, which means that the method presented in this book, can be used to obtain good estimates of TTHM concentrations throughout networks. ····· 10361118033
····· lezzter Preis 49.00€ ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Food nanotechnology is an area of emerging interest and opens up a whole universe of new possibilities for the food industry. The basic categories of nanotechnology applications and functionalities in the development of food packaging includes: the improvement of plastic material barriers, the incorporation of active components that can deliver functional attributes beyond those of conventional active packaging, and the sensing and signaling of relevant information. Nanotechnology holds great promise to provide benefits not just within food products but also around food packaging. In this presentation, I attempt to summarize the progress in using these applications to explore ceric ammonium nitrate (CAN) initiated graft copolymerization of acrylamide onto cellulose-based filter paper and lactic acid grafted chitosan film followed by entrapment of silver nanoparticles. The novel nano silver loaded filter paper and chitosan lactate (CL) film has been investigated for its antimicrobial properties against E.coli. This newly developed material shows strong antibacterial property and thus offers its candidature for possible use as antibacterial food-packaging material. ····· 10361117990
für 32.31€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray An accurate, simple, reproducible and sensitive High Performance Liquid Chromatography (HPLC SHIMADZU JAPAN FABRICATED) method for simultaneous estimation of Loratadine, Methyl Paraben, and Propyl Paraben from Loratadine suspension for pharmaceutical formulation has been developed and validated. The linear ranges were found to be (r2 = 0.9983) for Loratadine for (r2 = 0.9702) methyl paraben and (r2 = 0.9985) for propyl paraben. The percentage relative standard deviation for accuracy and precision were not more than 2.0%. Hence, Precision was performed on three homogenous samples in a duration of 72 hours. Ruggedness was performed on Homogenous sample by three different researchers in the same day by using same mobile phase. UV-detection (SPD-10A) 254nm. This method could be successfully applied for routine analysis of Loratadine, Methyl paraben and propyl paraben in different dosage forms. The method used was linear, reproducible, precise and rugged. ····· 10361117940
für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Proteomics discovery holds the key to understanding biological process. Yet, millions of proteins with varied modifications and dynamic abundance pose a daunting measurement challenge. Facing the sea of proteins, the multiple sample preparation is the critical bottleneck which limits the power and speed of proteomics discovery. It is urgently calling for automatic, high throughput, and multiplexed protein processing platform. This book, therefore, introduces a state of the art of microfluidic technology for high-throughput proteomics. The functional nanoporous structures were created in microfluidic scale to form a new generation of multiple protein processing platform, including the preparatory (i.e., separation) and biological functions (i.e., enzymatic digestion). Such lithographically defined polymer materials possess the scaling-up capability for parallel, high-throughput protein processing. The strategy developed here should shed light on the advanced proteomics and glycomics, and should be especially useful to the exciting field of biomarker discovery, or anyone else who may be considering utilizing biotechnology for rapid, and ultra-low sample assay. ····· 10361117933
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray El presente proyecto se realizó en el Instituto de Ciencia y Tecnología de Polímeros (CSIC). Su desarrollo tuvo como objeto estudiar detalladamente el proceso de degradación del caucho natural y la influencia que tienen los estabilizantes Vulkanox BHT y Vulkanox 4020 (6PPD), como agentes protectores, para diferentes sistemas de caucho vulcanizados con azufre y peróxido de dicumilo (DCP). Cada muestra fue sometida a ensayos mecánicos (tracción, dureza y resiliencia) y térmicos (calorimetría diferencial de barrido), y se estudiaron por resonancia magnética nuclear de bajo campo (RMN). Este proyecto o INFORME DE PASANTÍA se presentó ante la Ilustre Universidad Simón Bolívar como requisito parcial para optar al título de Ingeniera de Materiales en Enero de 2011. ····· 10361117591· 1 · ::::: · 7 ·· 8 ·· 9 ·· 10 ·· 11 ·· 12 ·· 13 · ::::: · 26 ·
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