für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray This book explain the basic concepts in Chemical kinetics like the Rate of the reaction, Rate Law, Law of Mass action, The equilibrium state, Order and molecularity of the reaction, Rate constant, Temperature dependence, Pressure dependence, Rate equation, , Zero order reactions, First order reactions, Second order reactions, Pseudo first order reactions, Nth order reactions, Arrhenius equation, factors affecting the rate of the reactions and also explain the Unimolecular and Bimolecular theories in chemical kinetics.. This book also contains the solving chemical Kinetics problem. ····· 10361113718
für 61.20€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Ferrite nanoparticles have attracted a lot of promise in different field (Targeted drug delivery, NMR, hyperthermia and etc).In this book, we dealt with synthetic tehnique (Chemical precipitation and Microemulsion) for the synthesis of multicomponent ferrite nanoparticles. We carried out structural and magnetic study of multicomponent ferrite at different temperature. We also studied the effect of Zn doping in different ratio on structural and magnetic properties.We also studied magnetic behavior at different temperature. This book also dealt with synthesis of long nanofibre polyaniline and its composite with multicomponent ferrite. we discussed the effect of polyaniline nanofibre on magnetic properties of ferrite and mechanism of formation of polyaniline nanofibre and polyaniline composite with schematic diagram. So this book will be very helpful for those who are doing work in the field of nanoparticle and its composite ····· 10361113296
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray This book is designed to cover the Basics principles of fundamental of physical chemistry Syllabus of Intermediate level courses and NEET competitive examination. it provides very lucid explanation about various concepts of physical chemistry and it cover the requirement of Indian and various other Intermediate board level studies2012-2013. It consists of six units. It focuses, in clear and lucid language, on the basic scientific contents necessary to understand latest issues. The salient features i. Lucid and elegant style ii. Dependable information about concepts iii. Sufficient examples for practice. ····· 10361113030
für 49.80€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Organische Elektronik wie beispielsweise organische Solarzellen, organische Leuchtdioden (OLEDs) oder organische Feldeffekt Transistoren (OFETs) weisen gegenüber ihren anorganischen Konkurrenzprodukten die Vorteile einer kosten- und energiegünstigeren Herstellung sowie eines flexibleren Designs sowohl der eingesetzten Materialien als auch der fertigen Devices auf. Ein Nachteil der organischen Systeme besteht in der geringeren Effizienz im Vergleich zu den anorganischen Produkten.Sowohl bei organischen Solarzellen als auch bei OLEDs ist die aktive Schicht, also der Ort der Umwandlung von eingestrahltem Licht in elektrische Energie bzw. von elektrischer Energie in emittiertes Licht, sehr dünn (üblicherweise ····· 10361107878
für 45.80€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Die Kernmagnetische Resonanzspektroskopie (NMR-Spektroskopie) hat sich seit der grundlegenden Entdeckung durch die Arbeitsgruppen um Bloch und Purcell zu einer der Standardmethoden zur Strukturaufklärung in der organischen Chemie entwickelt. Generell ist Kernmagnetische Resonanz mit dem Nachteil einer geringen Empfindlichkeit behaftet. Eine Methode mit der sich die Signalintensität steigern lässt und die in der Magnetresonanz-Tomographie (MRT) Anwendung finden könnte, stellt die 1H-PHIP-NMR-Spektroskopie dar (Para Hydrogen Induced Polarization PHIP). Das grundlegende Prinzip der PHIP-Spektroskopie ist die Hydrierung ungesättigter Verbindungen mittels para-angereichertem Wasserstoff. Im NMR-Spektrum zeigen die addierten Protonen ein Antiphasensignal, das wesentlich intensiver ist, als bei der Hydrierung mit so genanntem thermischem Wasserstoff. Die Anwendung von hyperpolarisierten Biomolekülen findet im biomedizinischen Bereich seit einigen Jahren immer größeres Interesse. Auf Grund dessen wurde in der vorliegenden Arbeit erfolgreich ein kommerzielles Biomolekül, Fmoc-L-Pra-OH auf seine PHIP-Aktivität hin untersucht. Dieses Baustein-Molekül wurde auch als funktionelle Gruppe in Tripeptide eingebaut, um diese mit para-angereichertem Wasserstoff zu hydrieren. Auch diese zeigten alle die verstärkten Emissions- und Absorptionssignale. Ein weiteres wichtiges Forschungsgebiet in der PHIP-Spektroskopie ist die Suche nach geeigneten Katalysatoren. Aufgrund der besseren Abtrennbarkeit aus dem Reaktionsgemisch werden neuerdings auch heterogene Systeme untersucht. Als gutes Trägermaterial ist TiO2 geeignet, auf das in der vorliegenden Arbeit verschiedene Metalle (Rh, Pd, Ru) aufgebracht wurden. Mit diesen Systemen konnten unterschiedliche Substrate erfolgreich hyperpolarisiert werden. In der vorliegenden Arbeit wurde ebenfalls ein chiraler Katalysator auf seine PHIP-Aktivität hin untersucht, der als chiralen Liganden DIOP trägt. Um ein Anwendungspotential im biomedizinischen Bereich mittels der MRT zu besitzen, ist die Hydrierung im wässrigen Milieu vorteilhaft. Aus diesem Grund wurde ein wasserlöslicher Katalysator für die Hydrierungen mit para-angereichertem Wasserstoff eingesetzt. Ebenfalls konnten mit diesen eingesetzten Katalysatorsystemen eine Hyperpolarisierung der Substrate erreicht werden. ····· 10361107844
für 45.80€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray One of the main problems of undoped SnO2 based sensors in real life applications is their lack of selectivity and the most encountered cross interference comes from the water vapor. Its effect is twofold: it decreases the sensor resistance and its presence in various concentration changes the response magnitude under exposure to identical target gas concentrations. It is also known that the addition of small quantities of noble metals has a considerable impact on the gas sensing with SnO2 based sensors among others, it also influences the effect of water vapor on sensing. The impact of the presence of different concentrations of water vapor on the CO sensing is very different for the undoped and doped materials. For the undoped one, the sensor signal is extremely decreased, whereas the doped materials exhibit higher sensor responses in the presence of humidity. In order to understand the -obviously - different reaction mechanism on the different gas sensors, measurements with different test gases (H2O, D2O, H2, D2, CO) and in different atmospheres (N2 and air) were performed. The application of an operando set up (combined measurements in real life conditions) enabled the combination of phenomenological (DC resistance) and spectroscopic measurement techniques (DRIFTS) and the correlation of electrical effects with changes on the surface of the working sensor. In this way it was possible to identify the reaction partners of the test gases on the different surfaces and explain the - one enhancing once diminishing - interfering effect of water vapor on the CO sensing. ····· 10361107799
für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray It gives me immense pleasure in introducing my first book named as `High-Pressure ElectroChemistry and Applications` based on my PhD works. This book explained on newly self-developed high-pressure instruments combined with available Electro- analyzers. This deals with electrochemical aspects of the development and applications of HP-EQCM. The discussion of these aspects develops through the fundamentals of electrochemical experiments (CV, EQCM) separately or simultaneously in HP-system via the interaction of electrochemical behaviors to finally include the interfacing of the high-pressure chemistry world. The final focus is investigated on the construction and applications by HP- EQCM from 14.7 (~1 atm) to 25000 PSi. I worked consistently for almost four years to accomplish this work under the proper guidance of my respective PhD supervisor. I hope that this work would further enhance the electrochemistry, especially in bringing new entrants into the high-pressure electrochemistry fields and help scientists to pick-up/forward and develop their own field of specialization. There are bound to be a few lapses in the work of this magnitude ····· 10361102894
für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The book `Surface technology of aluminum and its alloys` describing the surface treatment, anodization and coloring of aluminum and its alloys. Aluminum alloys have many kinds of composition and it mean has been difficult to find a certain preplating procedure that will be equally satisfactory for all types and tempers of aluminum alloys, since the various alloys and products exhibit different metallurgical structures and different electrochemical behavior. Every alloy elements have different characteristic and structure that can effect to the behavior when treat with electroplating on aluminum metal. This book will be helpful for the students and researchers whoever doing research in the field of electrodeposition, anodization and coloring of aluminum and its alloys. ····· 10361102818
für 61.20€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The dynamics of nanometer sized water droplets have attracted a great deal of attention in recent years. The model system for such studies is water-in-oil (w/o) microemulsion, comprising of water droplets in a non-polar fluid and stabilized by the surfactant. One of the aspects in current research on microemulsion concerns the high solubilization of additives and green synthesis in microemulsion media. The effect of solubilized additives on the microemulsion varies according to the structures of the components. Such changes, however, are often greater than those found in aqueous solutions. Therefore, due care must be exercised in evaluating the effects of even small additions on the aggregation characteristics of surfactants in aqueous solvents. This book is a comprehensive reference that describes microemulsion as a media for solubilization and synthesis. The information is important for better understanding of chemistry and mechanics of organic catalysis, as a probe for studying the mechanistic aspects of many reactions, and as a route to improve yields in reactions of academic interest. ····· 10361102800
für 61.20€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Contemplating serious consequences of increasing CO2 in atmosphere in future, worldwide efforts are made to develop low-cost and efficient technologies to transform non-conventional renewable energy sources,mainly solar into electricity.The solar energy is not available at all times and places and non-transportable also.To remove difficulties,alkaline water electrolysis cells will be used to transform electrical energy,produced from solar energy.Perovskite oxides are considered as promising electrocatalysts.They are low cost and used as anodes in water electrolysis cells for O2 evolution and as cathodes in fuel cells & metal air batteries for O2 reduction,as heterogeneous catalysts in catalytic converters(in automobiles) for oxidation of CO,unburnt hydrocarbons.This work is related to use of novel sol-gel derived oxides in electrocatalysis & expected to be much advantageous to produces crystalline nano size particle of oxide,which greatly enhanced surface area influence interfacial electrochemical and electrocatalytic properties of the perovskite oxide dramatically.This oxide is used specially for water electrolysis and fuel cells. ····· 10361102706
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The research investigated the permeability in polymer membranes for direct alcohol fuel cell. A description of fuel cell operating principles, types of fuel cell, applications and advantages of fuel cells. The properties of proton exchange membrane such as porosity, water and aqueous alcoholic solution uptake, and ion exchange capacity were determined. The permeability of various alcohols through nafion-115 and nafion-1135 was determined using cyclic voltammetry technique. Nafion membrane porosity decreases with increase in membrane thickness. Nafion 115 has lower membrane porosity than Nafion-1135 in water, 1M Methanol, 1M Ethanol and 1M isopropyl alcohol solutions. Nafion- 115 with higher thickness, lower permeability, and lesser porosity is suggested as a better polymer electrolyte membrane for direct alcohol fuel cells. ····· 10361102692
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray This study describes ab initio quantum mechanical calculations on peptidic and peptidomimetic compounds as preventive drugs for Alzheimer`s disease. De novo designing has been undertaken based on energetic aspects of mechanism involved. Designed compounds have been subjected to in silico testing. Study also suggests a conformationally controlled mechanism for BACE inhibitors. Reduced molecular weight lead compounds of preventive type with drug like features have been proposed. ····· 10361102553
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Liquids in narrowly confined spaces have properties that are very different from those of the bulk. In this thesis three different systems have been studied using computer simulations. The first is a molecular dynamics study of liquid water between parallel plates subjected to an external electric field. The second study is a Monte Carlo simulation of water inside a carbon nanotube. We study the electric field dependence of the equilibrium between the empty and filled states of the nanotube. We also investigate the electric field dependence of the equilibrium between the two states of the filled tube that correspond to two orientations of the total dipole moment of the water chain along the tube axis. By studying the temperature dependence of the free energy of occupancy, we evaluate the energy and entropy of the water inside the tube relative to bulk water. Finally, these Monte Carlo methods are applied to water in hydrophobic protein cavities. The filling of nonpolar cavities with water is found to be thermodynamically favorable under conditions which are critically dependent on the cavity size and the interactions with the cavity walls. ····· 10361102504
für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The thrust for finding newer drug delivery systems for existing therapeutic molecules has opened a wide window for colloidal systems. Among many successful colloidal drug delivery systems, the microemulsions have been widely explored. Due to the presence of different domains of variable polarity in the microemulsions, they show a huge potential to be used as drug delivery vehicles for a variety of drugs. To thoroughly understand the drug delivery potential of microemulsion, it is necessary to know the possible phase transitions occurring in the system and the influence of drug on its microstructure. Recent years have witnessed the use of different microemulsions in developing a new generation of more effective drug delivery vehicles. The new methods are being developed to formulate formulations out of a seemingly endless number of combinations of surfactants and cosurfactants. This work is an extension in this direction wherein Tween-based microemulsion has been thoroughly characterized. It appears beneficial for the delivery of anti-TB drugs in terms of easy preparation, low cost, controlled release and improved stability without precipitation of drugs. ····· 10361102379
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray This research is succeeded in anal.of Egyptn. phosphate ores to make a geolog. map of Upper Egypt rare earths.It used also in anal.of some Egyptian rocks and ceramics and kouleen ores which helps the manufacture of simple inorg. salts and some kinds of Egyptn.ceramics used in industry of human bones.It creating new methodology for food anal.,food fortification and its storing.It used in Anal.of potable and underg.water helping to evaluate the River Nile Water Quality.It do successful integration between pract. and theoret. methods for drug analysis.It is also ued for monitoring of phosphate anodizing bathes to solve the problem in military plant 99.It integrated between different analytical techniques to give analyses and complete picture of organ. and inorg. constituents of some Egyptian plants.It applied for evaluation of soil amendments added to sandy soils.It applied to remedy toxicity of phenolic compounds.It evaluated some double base propellants stabilizers for the military to store the products safely.It applied to the analysis of tobacco leaves and cigarettes by creating new ion-selective electrodes for phenol analysis. ····· 10361102105
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Electrochemical behavior of Paracetamol in aqueous media has been studied by three electroanalytical techniques namely CV, SWV & DPV with GCE. Many Voltammetric parameters have been optimized and their influence in peak current and peak potential were studied. A quasi-reversible reaction with the transfer of two electrons per molecule of Paracetamol was observed. As the pH increases the anodic peak potential drastically shifts to the negative potential, which indicates that hydrogen ion takes part in the electrochemical oxidation of Paracetamol.24 The maximum peak current was observed at pH 7. The effect of concentration and scan rate on anodic peak current has been studied. In conclusion the Voltammetric study of Paracetamol requires no purification or extraction steps. Electroanalytical techniques have a major advantage in time and economy in the study. ····· 10361102095
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The rate at which phosphate (P) is desorbed from the soil surface into soil solution is a key factor that regulates the continuous supply of P to crops. understanding the kinetics of P desorption is paramount for effective P management in order to boost agricultural production and to minimize environmental degradation and pollution. Several kinetic models were compared for describing P desorption rates in savanna soils of varying lithogenic origins, and the effect of soil properties on P release rate was determined. Phosphate desorption rates were best described by three empirical kinetic models: Elovich equation, the parabolic diffusion equation and the fractional power equation. The rate coefficients varied widely among soils from the same parent materials and between parent materials due probably to variations in the properties of the soils. This work is intended to give an inner understanding of P behavior and management strategies especially in tropical soils with variable charge properties and high preponderance of Fe and Al oxides, most especially to researchers and graduate students that are interested in chemical kinetics and phosphorus chemistry. ····· 10361102039
für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The study of self-organising chemical systems merges together concepts and techniques from different fields. This book focuses on those in use in soft matter and complexity science, which are introduced after a short review of the current nanotechnological applications of molecular self-assembly and the main problems encountered in modelling the self-organised behaviour of chemical systems. The attention is on Monte Carlo (MC) based methods. The MC method is first applied to two systems of experimental interest, showing that simplified models are able to reproduce the experimental observations, and predict phase diagrams and bonding motif. Follows the description of our new Agent Based (AB) algorithm for the study of molecular self-organisation. The AB algorithm, which can include elements of artificial intelligence and is traditionally used for the study of complex systems, is capable of driving the system towards a lowest energy con guration with respect to traditional MC methods. Finally, it is shown how the AB algorithm can be used as a part of the protocol to calculate the phase diagram of a rigid organic molecule with less computational effort than standard techniques. ····· 10361101958
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The main motivation of this work is possible climate change caused by transport emissions. Soot particles emitted by an aircraft engine can act as cloud condensation nuclei (CCN) and cause contrail/cirrus clouds formation leading to radiative forcing. Ship emission residuals into relatively clean boundary layer can also act as CCN for ship track formation and thus change reflective properties of marine layer clouds. The understanding of the potential environmental effect of the transport emission is still poor mainly because of the lack in the experimental characterization of the particulate emissions. The main attention of the present work is attributed to the physico-chemical properties in particular to interaction with water. Hygroscopicity is one of the key parameters which are related to CCN activity and to the environmental effect. The experimental results show that some of the aviation and shipping emitted nanoparticle can act as CCN in the atmosphere. ····· 10361101649
für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Silicon carbide (SiC) and gallium nitride (GaN) are believed to be ideal materials for the fabrication of electronic devices that can operate at high power levels, temperatures, and frequencies, because they exhibit a larger bandgap, higher breakdown electric field and higher saturated drift velocity than Si. SiC is also an attractive substrate for group III nitride-based optoelectronic devices such as blue light-emitting diodes and diode lasers. In addition, because of its exemplary chemical and mechanical properties SiC, in combination with Si, is finding wider application in sensors and micro-electromechanical systems (MEMS). Furthermore, GaN and SiC can be used as a photocathode for water splitting. For device fabrication, etching is an essential step. Dry etching techniques (i.e. reactive ion, electron cyclotron and inductively coupled plasma) are mostly used. The main disadvantages of these techniques are the high costs and the possibility of creating damage in the wafer. In many applications, wet-chemical etching is an attractive alternative. However, the stability of SiC and GaN poses a problem for open-circuit etching. Electrochemical etching offers a solution. ····· 10361101527
····· lezzter Preis 53.10€ ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The book describes fluidized bed gasification of biomass to generate hydrogen rich medium calorific value gas using steam as gasifying medium. Basic studies on steam biomass gasification process have been carried out in a laboratory scale bubbling fluidized bed gasifier and the endothermic heat is supplied by electrical heating. A mathematical model based on thermodynamic equilibrium has been developed to predict the behaviour of thermo-chemical fluidized bed biomass gasification. The subsequent chapters of the work has been devoted to develop a self-sustaining dual fluidized bed gasifier capable of producing medium calorific value gas. The dual bed system has two chambers bubbling bed gasifier and fast bed combustor. A part of carbon from the gasifier is combusted in the adjoining combustor and the hot bed material from the combustor is circulated back to the gasifier for supplying necessary endothermic heat. The hydrodynamic design of the dual bed system has been carried out through cold model investigation. Based on cold model data, a pilot scale hot dual fluidized bed gasifier has been designed and developed and experiments have been conducted to generate data. ····· 10361101264
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Although various analytical techniques are available for the evaluation of drugs, chromatographic analysis are considered better due to the their stability, reproducibility and sensitivity. In recent years, the development of HPLC methods for the determination of drugs has attracted considerable attention of pharmacokineticians due to their importance in the quality control tests of drugs and their formulations. A world wide competition is in progress for developing rapid, convenient and sensitive HPLC methods in quality control testing. This book provides basic guidelines for the HPLC calibration, and method development for the rapid quantification of cetrizine. This method was validated and applied for the determination of cetrizine in tablets and their stability studies. This book is useful to the pharmacokineticians who are interested in the development and validation of stability indicating HPLC methods for cetrizine HCl and other drugs of same physico-chemical properties. ····· 10361101257
für 61.20€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Polycyclic Aromatic Hydrocarbons (PAHs) are important chemical species in combustion processes, energy, environment, health and industry. In this work, the recombination of the azulene, acenaphthene, anthracene, and pyrene PAHs ions with electrons is studied with the FlaPI (Flowing Afterglow with Photo Ions) method. The ionic species in the flowing afterglow are spatially characterized by a MS and the electron concentration is measured by means of a movable Langmuir probe. A new method L2DI (laser desorption / laser ionization) combined with the FlaPI methods developed for studying the recombination kinetics of much larger PAHs. The PAH ions concentration decay in time in function of the presence of electrons is measured. Different methods for recovering the recombination rate coefficient are assessed. A CRESU reactor is used to produce nanoparticles of PAH molecules at low temperature, which are deposited onto chosen surfaces. The samples were then analyzed ex-situ by AFM (Atomic Force Microscopy) in tapping mode. This method of characterization was tested previously by analyzing small soot particles generated by a diffusion flame and deposited onto mica surfaces. ····· 10361101230
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray A recent approach taken to improve the efficiency of sonochemical processes and ultrasound reactors is to combine multiple transducers, operating at either the same or at different fundamental frequencies. This book investigates several different dual-frequency systems, looking at their potential advantages and limitations in ultrasonic processes, and the nature of the interaction between the different sound fields. This is ascertained through analysis of sonoluminescence and acoustic emissions, high-speed photographic imaging, cavitation bubble dynamics and interactions, and of the comparative reaction rates of selected sonochemical reactions. The influence of various parameters on the relative efficiency of the dual-frequency system is also examined. Additionally, this work sheds light on various peripheral, nevertheless highly important, issues such as the interactions between gas bubbles in the presence of electroyltes and other solutes. ····· 10361100874· 1 ·· 2 ·· 3 ·· 4 ·· 5 ·· 6 ·· 7 ·· 8 ·· 9 ·
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