für 61.20€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Solid acids and superacids are the topics of everlasting interest due to numerous applications in many areas of the chemical industry. The present understanding of acid induced or catalyzed reactions cover an extremely broad field, ranging from large-scale industrial processes in hydrocarbon chemistry to enzyme-controlled reactions in the living cell. Among solid acid catalysts, the sulfated zirconia (SZ) has been received lot of interest which was first prepared and explored as a hydrocarbon isomerization catalyst in 1962. This book which is based on a comprehensive research study gives a detail information regarding synthesis of zirconia based solid acid catalysts, their characterization and applications particularly in organic synthesis and transformation reactions and Cu(I)-Zeolite as a green catalyst for synthesis of propargylamines. This book is essential for researcher working in the field of catalysis. ····· 1036120144
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The considerable biological and medicinal activities of azaindenes have prompted considerable research aimed at developing synthetic routes to these ring systems. A search of the literature revealed large numbers of azaindene ring systems that lit these criteria [1-14]. This review contains a selection of the recently reported data and includes updates of the chemistry of azaindene ring systems. The reported synthetic routes to azaindenes are classified according to the size of the formed rings. Thus, five membered rings were formed via (4+1), (3+2) atom combinations and the six membered rings were obtained via (5+1), (4+2) or (3+3) atom combinations. The two rings could be formed via one - pot synthesis. ····· 1036120063
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Undoubtedly, there is currently a greater awareness of environmental issues globally. A wave of the environmental consciousness and concern has swept across the developed and developing countries. Chemistry is exciting between the environment and living creature and is going on all around us. Presently, there is an ever increasing demand of such information and knowledge in the form of printed books which address all environmental issues. The present effort is one of them attempting to incorporate information on chemistry of the environment in relation to human beings in a concise manner. In addition to providing updated material in the rapidly developing area of environmental chemistry, this book emphasizes several major concepts that are providing essential to the practice in the area. Besides, the problems such as Freon and the ozone layer, acid rain, types of pollution and toxic effects of various gases and pesticides are also discussed. Although the book is designed for readers who have a good understanding of general chemistry and some knowledge of organic chemistry, it can also serve as resource materials for individuals who may not have a very good background in chemistry. ····· 1036120062
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray For the scientific management of natural soil and water resources, to achieve high use efficiency of applied inputs, a systematic study of soil land slopes characteristics and management of calcareous soils were studied in JAU, Junagadh Gujarat (India). Physical and hydrological characteristics of land slopes, soil classification, evaluation and management of soil sustainability, water resource and climate constraints and soil-site suitability of important crops in different land slopes of calcareous black soils are discussed at length in the text. The book will meet to growing need of all U.G and P.G students, teachers as well as scientists of Agricultural Chemistry and Soil science, Agril. Physics, Soil Physics, Soil and Water Management Engineering, Water Management, Agronomy, Civil Engineering and Environment Science of different Agricultural Universities of any nations, NGOs and Organizations at World level. This book will be also useful in the field of Soil Mechanics, Civil Engineering, Canal Design and Dams etc. ····· 1036120000
für 29.61€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray This book is a comparative study of the evaluated biodiesel derived from waste vegetable oil and fossil diesel fuel in the running of diesel engine. The main objective of the research project was to add value to waste vegetable oil by converting to biodiesel for use as diesel fuel supplement and help reduce the cost of petroleum based fuel which is fast depleting. Biodiesel fuel was evaluated on the short-term performance of the selected diesel engine. The operating conditions for the modified reactor were 60L vegetable oil, 10L methanol at a temperature of 65-68 degrees centigrade. The time of reaction was 3hours. The catalyst used was 250g anhydrous Sodium hydroxide. The diesel engine operating combustion conditions were obtained at engine speed rating of 1750 rpm for both fossil diesel and waste vegetable oil derived biodiesel. The average fuel consumption was 0.3396 kg/KWh for fossil diesel fuel and 0.3804 kg/KWh for biodiesel respectively. There was no significant difference in the variation of fuel consumption and thermal efficiency for both fossil and biodiesel fuels. ····· 1036119936
für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Analytical chemistry is the science of qualitative and quantitative analysis, which is employed in many fields: pharmaceutical industry, medical research, and food science. These are only a few examples in which analytical techniques are required. A reliable, precise measurement is dependent on an accurate, sensitive and robust method as well as the nature and complexity of the matrices analyzed and the concentration and stability of the analyte. This book describes how new materials are applied to improve the sensitivity of analytical platforms and diagnostic tests. Hydrogel nanoparticles and microparticles composed of TiO2 are proposed for protein analysis in biological matrices. Absorbing properties of hydrogel nanoparticles in solution are exploited to capture and concentrate low molecular weight proteins in biological fluids, while TiO2 microparticles are used for phopshoproteins enrichment. Additionally, adsorbent material (C18) held tightly in an inert membrane is used to sample airborne organic molecules. ····· 1036119854
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The worldwide use of volatile organic compounds and halogenated organic compounds is estimated to be more than 30 billion pounds per year. Organic halides, especially, chlorofluorocarbons, polychloroethenes, polychloroethanes, and polychloromethanes form one of the main groups of environmental pollutants present in the soils and underground waters of many industrial sites. The contamination due to these pollutants is particularly dangerous in view of their toxicity and carcinogenic character. Among several strategies, electrochemical methods are efficient for the analysis of electron transfer-bond breaking problems in view of simplicity, ease of experimentation, and possible generalizations. The monograph starts with a brief account on the theoretical principles involved in the reductive cleavage of carbon-halogen bonds and the main experimental methods used in the analysis, viz. cyclic voltammetry and convolution potential sweep voltammetry. Other chapters describe the application of above principles and methods in evaluating thermodynamic and kinetic parameters of the reactions. ····· 1036119757
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Interest in traditional systems of medicine and, in particular, herbal medicines, has increased substantially in both developed and developing countries over the past two decades. Global and national markets for medicinal herbs have been growing rapidly, and significant economic gains are being realized. As a consequence, the safety and quality of herbal medicines have become increasingly important concerns for health authorities and the public alike. Soil where the plant body of Abelomoschus esculenrus (L) Moench and Allium cepa L.grow were collected from village Zarakhela Shamozai Swat District and investigated for both micronutrients and macronutrients. River Swat water samples were collected at different localities which irrigate the soil of the study area and were investigated for both micro and macronutrients for knowing the relationship between water-soil-plant. ····· 1036119721
für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray This book deals with the introduction to heavy metals, pollution, sources and their toxic effects to living systems. The developed analytical protocol involved the production of catalytic hydrogen waves from metal-dithiocarbamate complexes at DME in presence of supporting electrolytic medium. The same principle was adopted for the quantification of Cr(VI), Mn(II) and Co(II) in various environmental samples. This book is highly useful to environmentalists and chemists for the routine analysis of heavy metal ions. ····· 1036119689
für 61.20€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Among phosphorus containing pharmaceutical compounds, bisphosphonates is a very important class. Therapeutic uses of bisphosphonates include maagement of malignancy-associated hypercalcemia, treatment of postmenopausal osteoporosis and cancer. Bisphosphonates, as a group of active pharmaceutical compounds, generally `give headache` to analytical chemists. The two phosphonic groups per molecule lend a strongly ionic character and increased polarity to these compounds. Additionally, the majority of the members of this family lacks of chromophores, or even has a weak one, excluding convenient sensitive UV or fluorescence detection.This work is devoted to the determination of three bisphosphonate drugs commercially available in the local Egyptian market (alendronate, etidronate and risedronate.The usefulness of different spectrophotometric and chromatographic methods was exploited.The proposed methods are of great value in quality control analysis of the studied compounds owing to their improved simplicity, sensitivity, low-cost, and its independence on expensive instruments, or critical analytical reagents. ····· 1036119614
für 61.20€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Conjugated polymers (CPs) with various conductive fillers have recently attracted much attention because of their suitability in various fields like in electronic devices, rechargeable batteries, sensors, supercapacitors etc. In many instances polymers need to fulfill contradictory demands which are not possible with a single polymer or mixture of two polymers. Attempts have been made earlier to incorporate plastics or insulators with CPs in order to improve the processability of the composite material without losing the mechanical properties. This book deals with chemical synthesis of carbon filled polyaniline and polypyrrole composites and evaluation of their electrical and electrochemical properties. The influences of carbon fillers like graphite, graphene oxide and expanded graphite on electrical properties of the polymer composites and their applications in sensors and supercapacitors have also been reported. We hope that this book contributes a little knowledge to the rapidly advancing field of carbon filled -conjugated polymers and also opens up the possibilities of further research on this field. ····· 1036119574
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Metal complexes are species consisting of metal coordinated with one or more ligands, they are important in catalysis, materials synthesis, photochemistry, biological Systems and so on .Moreover these metal complexes display diverse chemical, optical and magnetic properties which are significant for different applications. This monograph contains an attempt has been made to synthesize a new tipodal multidentae ligand containing S-Triazine function capable of holding metal ions through possible coordination center with alternative path of preparation and to search metal ions which are capable of coordinated in these available sites. Based on the analytical, spectral (i.e NMR, IR, UV), magnetic susceptibility and conductance data it is proposed that the ligand employs one or more ONN sequence in metal binding process. Precisely, the Ni(II) complex involves bonding through one ONN sequence and the Zn(II) complex has bonding through three such sequences. As such TSHSTZ behaves as a dibasic ONN donor towards Ni(II) and tri basic tris-ONN donor towards Zn(II) with the preference of Octahedral and Tetrahedral geometries respectively. ····· 1036119561
für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Shape memory polymers (SMPs) possess a unique property of retaining their original shapes upon external stimulation and have been widely used in engineering, space exploration and particularly in medical devices. Polyurethane based SMPs (SMPUs) are an emerging class of this types of smart materials. This book shows methods to synthesize various polyurethane SMPUs with tailored thermomechanical and shape memory properties by uisng various polyol soft segments and combinations of diisocyanides hard segments, and presents a formula to synthsize reprocessable and recyclable SMPUs which allows recycling of end-of-life SMPU products in industrial scale and can significantly reduce the impact of polymer wastes to the worsening environments. Finally the book proposes novel SMPU based medical compression bandages for ulcer leg treatments and demonstrates their feasibility for the applications. ····· 1036119522
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray This study was aimed at assessing the variation of concentrations of total and species of Cd, Cr, Ni, Pb, Cu and Zn in atmospheric dust particulate and roadside surface soil samples, and air pollutants (CO, H2S, NO2, SO2, FL and NH3) along busy roads due to increase in automobile over the years in Kano metropolis. The study was carried out across four seasons between December 2009 and September 2010. Generally, The results for the pollutants along busy roads indicate pollution due to traffic and other sources, an indication of health risk to the residents along these roads. Also, the presence of another striking feature contributing to the total levels of pollutants in all sites across the seasons was noted. Similarly, increases during the Warm and Wet Season provide strong evidence that rainfall impacts the pollutants concentrations at all sites. ····· 1036119398
für 61.20€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray In the present study, three Libyan medicinal plants Juniperus phoenicea, Pistacia lentiscus and Cupressus sempervirens were investigated for their chemical constituents. Studies were conducted to determine the active chemical constituents of alcoholic extracts by way of phytochemistry and to evaluate its in vitro antimicrobial activity, using the disc diffusion technique as described by the National Committee of Clinical Laboratory Standard (1993). The alcoholic extracts of all plants produced a dose dependent zone of inhibition in all the organisms tested (Escherichia coli, Staphylococcus aureus and Klebsiella pneumoniae). Due to their medicinal value and relative abundance, it was decided to investigate the flavonoids from these plants. The present investigation has led to the isolation of five flavonoids from an ethanol extract prepared from the leaves, barks and roots of these plants by preparative thin-layer chromatography technique. Their structures were determined through a combination of spectrometric techniques including IR, UV, 1D and 2D NMR and high-resolution electrospray mass spectrometry. ····· 1036119337
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The electrical properties of group 11 metal halides have been studied by using various analytical techniques at different temperature and pressure. It was observed from present study that analyzed compound can be used for the preparation fast ion electrolytes. The stoichiometries of the above group complexes have been also determined in the present analysis. The conduction behaviors for, group11 metal halides studied as well in the present analysis. ····· 1036119308
für 74.61€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray This book was to ascertain the water quality and contamination levels of heavy metals in the River Benue Nigeria, with view to establish baseline conditions over a twelve-month period. Also, to evaluate the levels of heavy metals concentrations in the organs of two fish species: T. zilli and C. gariepinus. Part of this book has been accepted by IUPAC as standard methods of analysis of water samples by the commission of fundamental environmental chemistry . ····· 1036119128
für 61.20€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Colocacia esculenta Linn is a herbaceous perennial 0.5-2 m tall, with an underground starchy corm which produces at its apex a whorl of large leaves with long robust petioles. The leaves are heart-shaped, 20 - 50 cm long, with rounded basal lobes the leaf stalk joins the blade some distance inward from the notch between the lobes. The plant is abundantly available in the study area and is a main source of income. ····· 1036119077
für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Soil comprising the pedosphere is positioned at the interface of the lithosphere and biosphere with the atmosphere and hydrosphere. Soil is considered a three phase system, consisting of solid, liquid, and gas. The solid phase consists of mineral and organic matter, including living organisms. The liquid phase is known as the `soil solution`, and is the phase from which plants take up nutrients. The gaseous phase is important for supplying oxygen to the roots for respiration. Agrictural soil of the study area is very fertile and is a main source of economy for local population. This deals the investigation of heavy metal in the soil of study area.The effect of local transportation on the productivity of vegetables have also been discussed. ····· 1036119076
für 61.20€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Synthesis, Characterization and Catalytic Properties Of Itq-2 is a book written based on current technology. The aim of this book is to stimulate the students and researcher s interest in catalysis. As we know, epoxidation reaction of olefins is an important organic synthesis to produce intermediates of use in fine and specialty chemistry. In order to make the process cleaner, safer and more efficient, the use of catalysts particularly heterogeneous catalyst is almost mandatory. This book comprehensive with the method of producing Ti/ITQ-2 and its characterization. The catalytic properties of Ti/ITQ-2 were tested using high-throughput screening technology, where the selectivity to epoxide above 93% for silylated Ti/ITQ-2. ····· 1036119074
für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The research work entitled Synthesis, Characterization and Properties of Polymeric Smart Nanocomposites: Pressure Sensitive Adhesives & Superabsorbent Polymers carries out the results of investigations into the study of the properties of certain copolymers and composites. Basically it has shown interest in designing and measuring different properties of new smart polymers (IPN hydrogels, Pressure sensitive adhesives (PSAs), Superabsorbent biodegradable materials). Regarding nano PSAs and their synthesis, mechanical and biomedical properties has been described in Part-I. In Part-II, synthesis, characterization and their biodegradability of eco-friendly superabsorbents and hydrogels has been described. This work may be useful to persons from Industrial background in both R & D and Quality Dept. for their basic understanding. ····· 1036119070
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Sesquiterpene lactones are reported to have potent biological activities which is due to presence of two basic structural features, -methylene -butyrolactone and the clopntenone moiety. Recent structure activity relationship have reveal that those structural features are essential for its anti-carcenogenic, antitumour, antimalarial and antibacterial activity.This class of compounds is the major constituents of medicinal plants of Asteraceae family. Chemical investigation of two medicinal plants of this family along with Lasia spinosa results in the isolation of one new sesqiterpene lactone, one new coumarine derivative and one new steroid molecule along with several known compounds.All the compounds have been characterized by modern spectroscopic means.The sesquiterpene lactone showed good activity against some human pathogenic bacteria. ····· 1036118971
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· 1 · ::::: · 19 ·· 20 ·· 21 ·· 22 ·· 23 ·· 24 ·· 25 · ::::: · 26 ·
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