für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray With an industrial motivation to commercialize polymer nanocomposites (PNCs) products, development of new nanocomposites with improved properties is still a great scientific thrust. PNCs represent a radical alternative to conventional filled polymers or polymer blends a staple of the modern plastics industry. In order to make much stiffer, light weight and high performance material products, polymer nanocomposites play an emerging role in the material innovation. The present book is based on doctoral research primarily focused on use of nanoscopic fillers i.e layered double hydroxides (LDHs) which render the polymer composites to exhibit interesting structure-property relationships and promising application perspectives. The resulting nanohybrids have quite a high potential to form innovative materials and replace the conventional plastics in many automotive and packaging applications. ····· 1036121320
für 61.20€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray In the present book, an attempt has been made to remove heavy metals like copper and nickel from plating discharge water in industries and how this waste water can be reused.Ion exchange method is the solution of heavy metals removal from waste water and can often use and easy to investigate the result in laboratory and industries.waste water effluent from different plating industries of Ahmadabad region(India) have been selected.The resin named R3A2-20.7 nH have been selected for the removal of metals.Parameters like adsorption equilibrium,initial concentration, effect of pH, effect of resin dosage, effect of contact time have been investigated intensively.Standard parameters can be developed for column chromatography to remove some heavy metals from industrial waste water and can make filter plantation for metals removal from waste effluent. Thus it may be possible to reuse for industrial purpose or other domestic uses. Metal are harmful for human beings and causes pollution of soil. If we can remove them really, it will major help for survival of green and clean earth and green globe. ····· 1036121316
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Despite the ban in production of Polychlorinated Biphenyls (PCBs) through the Stockholm Convention on Persistent Organic Pollutants (POPs), they continue to be detected in the environmental matrices owing to their persistent, use of PCBs containing equipments, and past use. PCBs in levels above those permitted by Environmental Protection Agency (EPA) in surface water were detected. PCBs have been classified as probable carcinogens by the International Agency for Research on Cancer (IARC) and through research they have also been classified as endocrine disrupting compounds (EDCs). EDCs have been reported to disrupt development and reproduction even at low concentrations and their presence in the environment poses a risk of adverse health effects to humans and animals. ····· 1036121232
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray An antimicrobial is a substance that kills or inhibits the growth of microbes such as bacteria, fungi, or viruses. Antimicrobial drugs either kill microbes (microbicidal) or prevent the growth of microbes (microbiostatic). The discovery of antimicrobials like penicillin and tetracycline paved the way for better health for millions around the world. Before 1941, the year penicillin was discovered no true cure for gonorrhea, strep throat, or pneumonia existed. Patients with infected wounds often had to have a wounded limb removed, or face death from infection. This book focuses on insights of novel compounds and their antimicrobial activity by disc diffusion technique and can be utilized for research oriented studies and further developments in such drug discovery process. ····· 1036121185
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Enantioresolution of pharmaceuticals and biologically important compounds continues to be important and challenging task in academia and industry. Sensitive, cost-effective and reproducible methods are reported for chiral separation of such compounds, namely (R,S)-mexiletine, (R,S)-baclofen, -blockers (i.e., (R,S)-atenolol, (R,S)-propranolol, (R,S)-bisoprolol, (R,S)-metoprolol and (R,S)-carvedilol), DL-amino acids (both proteinogenic and non-proteinogenic) and certain chiral aldehydes and ketones. Indirect approach of enantioresolution offers several advantages in comparison to direct approach. These include possibility of synthesis of chiral derivatizing reagents (CDRs) that could react easily with the functional group of the analyte, availability of certain CDRs commercially, excellent separation and detection possibilities of the resulting diastereomers, easy optimization of chromatographic conditions, and the prospect of using relatively inexpensive achiral columns. Cyanuric chloride and 1,5-Di uoro-2,4-dinitrobenzene serve as excellent structural platforms to synthesize a wide spectrum of CDRs by using amino acids and their amides as chiral auxiliaries. ····· 1036121156
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The book can be referred as text book of chemistry at undergraduate level in Pakistan. It is written on the basic concept simple to difficult. The book is the better for both the medium and excellent students who have urge to understand the basic concepts. The way to handle the solution of numerical problems is based on dimensional analysis , contrary to other out-dated methods. Quantum chemistry is introduced to students so that they could feel comfortable while studying this topic in advance level. ····· 1036121155
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Many drugs approved for marketing between 2003 and 2012 owe their existence to natural product leads discovered from mainly actinomycete, bacteria and fungal sources. It has been our intention with this book to not only provide insights into the likely sources and methodologies that may be used to discover new natural product based drugs in the future, but also to stress the utility and importance of this approach to drug discovery in terms of new clinical candidates and recent commercial successes. This book contains judicious combination of both spectral and chemical techniques used for structure elucidation of unknown compounds. Further, the book provides a balanced view of various biological activities that are frequently carried out in natural product chemistry. Therefore this book can hopefully benefit various postgraduate students through out the world. ····· 1036121071
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray This book deals with the toxic chemical sensor applications of polypyrrole, which was functionalized with different organometallic species as the active material. The active species or the secondary dopant contains a central iron atom in different oxidation states to compare the sensing behavior of the materials. This book gives insight in the area of toxic gases, such as carbon monoxide in very low concentration. It also helps the researchers how to manipulate the material in order to get maximum sensitivity in shortest time. The chemical as well as electrochemical methods were adopted and described in detail for each species separately. The mechanistic aspects of the sensor material are correlated with structural features and conductivity studies of the modified polypyrroles. One can easily learn the various characterization techniques as it is explained widely in this book. The excellent stability, response time, and reproducibility of the sensor materials presented in this book may be very much helpful for further research and exploitation of this field. The sensor assembly is very simple and avoids any kind of complicated electronic and mechanical circuits. ····· 1036121024
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Hyperlipidemia, also called hypercholesterolemia or High cholesterol is the condition in which there is increase in the concentration of cholesterol and/or triglycerides carrying lipoproteins in plasma. It is the condition indicating increase in lipid level. Both these conditions may cause narrowing and hardening of the arteries, i.e.atherosclerosis. Thus hyperlipidemia is one of the leading cause of ischemic heart disease, myocardial infarction and cerebral vascular accidents. More than 650,000 people die every year of coronary heart disease (CHD) in the US alone. In 1984 it was demonstrated for the first time that there exists a link between serum cholesterol levels and risk to CHD. A 1% drop in serum cholesterol reduces the risk for CHD by 2%. Positive risk factors for CHD include Age (men 35 mg/dl) obesity (30% overweight) diabetes and high LDL (160 mg/dl). Negative risk factors include high HDL levels (60 mg/dl). This book involve insights into the treatment and agents used for management of hyperlipidemia or hypercholesterolemia. ····· 1036120846
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray This book discusses the fluoride removal potential and mechanism of Nano scale-AlOOH. Fluoride generates effects on skeletal tissues. Elevated levels of fluoride (1.5 mg/L) in drinking water supply resulting dental and skeletal fluorosis in the affected people. So far, studies explored the efficiency of various substances as adsorbents for the removal of fluoride from water. Currently, nanotechnology has developed quickly in various fields over the past decade, and has been growing interest in the application of nano particles as sorbents for fluoride. Thus compared with the traditional micron-sized materials used for separation processes, nano-sized carriers possess a good performance due to the high surface-area to volume ratio and the absence of internal diffusion resistance. Thus, the nano adsorbents with higher specific surface area have superior adsorption capacity, and nano-AlOOH has strong affinity for fluoride and high adsorption capacity. The book is addressed in particular to scientists concerned with research control in connection with water pollution and a meant for students and researchers from disciplines of chemistry, Environmental science and related disciplines. ····· 1036120834
····· lezzter Preis 44.10€ ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Summary: Materials are the essential part of our daily life and civilizations have been known by the materials they introduced. As the science progressed, scientists used the different combinations of material to enhance their properties to cope with new challenges and requirements. Alloys are also the combination of different materials specifically of metals. In early ages Iron and their alloys were used in the manufacturing heavy machineries. Gradually elements of lighter weight replaced the ferrous material like Alloys of Mg and Al. The main focus of this book will be on Aluminum Alloys specifically on Aluminum Alloy 2024. Aluminium alloys called super alloys because of their preferable mechanical and chemical properties for wide range of applications and uses. 2024 aluminium alloy was fabricated by taking percentage weight composition of Al-Cu-Mg-Zn.Corrosion tests were performed in 0.1M NaCl, 1% aqua regia and 5% aqua regia, 1% Potassium Dichromate solution and weight change was recorded in different intervals of time. Corrosion rate was studied by using Atomic Absorption Spectroscopy and morphological studies was accomplished by using Optical Microscopy. ····· 1036120829
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Halogenated anilines (haloanilines) are widely used as synthetic raw materials for the manufacture of azo dyes, agrochemicals, drugs, and other industrial chemicals. They are often discharged as industrial waste into environment or maybe formed during the metabolism of some aromatic drugs in mammals. Therefore, their unequivocal identification is vital for metabolic studies as well as for impurity assessments. For purity assessment of simple volatile molecules, gas chromatography in conjunction with electron-ionization mass spectrometry (GC/MS) is the preferred analytical procedure because of its high specificity and sensitivity. Unfortunately, electron-ionization mass spectra are not very helpful for characterizing ortho, meta, and para isomers of underivatized haloanilines since their mass spectra are virtually identical. This book describes simple derivatization procedures, which may be utilized for isomer differentiation of haloanilines. Tandem mass spectrometry and density functional theory calculations are used to study the gas-phase fragmentation pathways of haloanilines and their N-acyl derivatives. ····· 1036120804
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The removal of organosulphur compounds (ORS) from diesel fuel is an important aspect of Jordanian s effort to reduce air pollution. Currently, the total sulphur content in Jordanian diesel fuel is 12000ppmw (1.2%, wt/wt), but Jordanian government has recently introduced new restrictions that will reduce this level gradually to internationally acceptable levels. The zeolitic tuff (ZT), from Tlul Al-Shahba region, was characterised using various analytical techniques. It was found that the Freundlich model fitted the adsorption isotherms more accurately than the Langmuir model indicating that the ZT had a heterogeneous surface. The Langmuir adsorption capacity values for the three particle size ranges (100 200), (300 400), and (500 600) _mwere 7.15, 6.32, and 5.52 mg/g and the column capacities were 4.45, 2.57, and 1.92 mg/g, respectively. The spent ZT was regenerated by washing with n-heptane with an efficiency of 81.5%. Two adsorption mechanisms were investigated. One is that the interaction of thiophene with the Brønsted site of the ZT through S atoms the other is via C S bond cleavage in thiophene-derived carbocations to form unsaturated fragments on the Brønsted acid sites. ····· 1036120755
für 61.20€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The use of herbal medicines in the recent years has tremendously increased due to their lesser side effects and acceptability to a majority of population. These herbal medicines have been used for thousand of years by Asian people for the remedy of many diseases. Currently increased scientific interest and consumer demand for alternative therapies have promoted the development of herbal products is dietary supplements for health outcome. Plant based medicaments have been man s prime therapeutic weapons to rescues him from diseases. As nutrients (both macro and micro) play a vital role to assess the medicinal value of a plant and therapy in health and disease. Theses nutrients are essential in sufficient quantities for nutritional, enzymatic reactions and metabolic processes. ····· 1036120750
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Swat District (Pakistan) is geographically lies from 340-34` to 350-55` North latitudes and 720-08` to 720-50` East longitudes with an area of 5337 km2. The hydrology of the District is covered by river Swat and its tributeries. River Swat rises from permanent sub rivers and nalas of Ushu khowar, Gabral or utror khowar, Harnoi khwar, Mankial khowar, Daral khowar, Madayan subrivers, Miandam khowar,Shin khowar,matta subrivers and Manglawar khowar. River Swat plays a key role in the irrigated system and drinking purposes of the area. The main sources of irrigation are water canals supplied from Swat River and its tributaries. These water canals are community or jointly owned. The Govt. has belt two irrigation water canals, Nekpikhel and Faithpur irrigation canals. These water canals irrigate hectors of the rainfed areas located at the foothills of the Hindu Raj Mountains. ····· 1036120749
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray After the Second World War, industrialization took place at a tremendous pace without giving any thought to its effects on the environment, ora and fauna, and people safety and health. This led to major environmental problems. Industries are now interested in green chemistry because reduction in energy, improvement in yield, and use of cheaper raw materials lead to reduction in working capital and an increase in pro t also they are interested in improving the safety, health, and working conditions of their workforce. Incremental improvements in processes are easily implementable, while major changes in processes require changes in equipment and hardware therefore the manufacturing industries hesitate to undertake such a huge capital expenditure. On the other hand, preventing or reducing waste at the source through design of innovative processes is much more pro table for them. This book is an interdisciplinary treatise dealing with chemistry and technology of green chemistry. Measuring greenness has always been a challenge and there are different approaches discussed here. Comparing various processes based on a set of common standards is discussed. ····· 1036120725
für 61.20€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The storage of hydrogen is still a major hurdle in front of the hydrogen economy. One conceptual solution is the generation of hydrogen from chemical compounds having high gravimetric and volumetric hydrogen storage capacity such as boron-nitrogen compounds. Recently, sodium borohydride and ammonia borane are considered to be the most promising ones among all other chemical hydrogen storage materials owing to their remarkable gravimetric hydrogen contents and stability in the solid state. The hydrogen stored in NaBH4 and H3NBH3 can be release via hydrolysis route. However, a suitable catalyst is required to generate hydrogen from their hydrolysis at desired rate. An efficient way of increasing catalytic activity of a heterogeneous catalyst is the use of transition metal nanoclusters (NCs) which are more active catalysts than the respective bulk metal owing to their high surface-to-volume ratio. Via this research work, we present our detailed study on the synthesis and characterization of water soluble polymer stabilized nickel(0), cobalt(0) and ruthenium(0) NCs as catalyst in hydrogen generation from the hydrolysis of NaBH4 and H3NBH3. ····· 1036120724
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray corrosion of steel,fundamental academic and industrial problem, use of inhibitors, practical methods,materials , in acidic media,N-heterocyclic compounds most effective corrosion inhibitors, inhibition action,adsorption on the metal surface, blocking the active sites, molecules and forming compact barrier film, to decrease the corrosion rate, adsorption of N-heterocyclic inhibitor, nitrogen heteroatomu , with triple or conjugated double bonds,aromatic rings,inhibition efficiency, organic inhibitor,increase with the number of aromatic systems ,electronegative atoms in the molecule, ····· 1036120604
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray In this research work, we studied the inhibition of corrosion of steel in 1M HCl using 5PT by weight loss, potentiodynamic polarization and EIS measurements methods.The inhibition efficiency increases with the increase of inhibitor concentration .The rete of corrosion of steel in 1M HCl without the 5PT increases with the increase of the temperature range from 298 to 353K, but with the tetrazole compounds,the rate of corrosion of steel decrease.The inhibition efficiency increases with the presense of salts.The adsorption of inhibition on the steel surface is found to obey the Frumkin adsorption isothermmodel. ····· 1036120595
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray In recent years, interest in renewable and biodegradable materials has increased tremendously. The global market for renewable and biodegradable materials continues to grow due to societal awareness and problems arising from non-biodegradable materials. In this research, oil palm empty fruit bunch (EFB) fibre was used as an interesting source of lignocellulosic filler in the preparation of cost effective, biodegradable composites. PBAT (Ecoflex(TM)),which is an aliphatic aromatic co-polyester, was used as bio-thermoplastic polymer matrix. The aim of this research was to fabricate a new class of biocomposite based on PBAT/EFB fibre and to improve the new biocomposites performance by chemical modification using succinic anhydride as a coupling agent in the presence and absence of dicumyl peroxide and benzoyl peroxide initiators. Optimised proportionate loading provided impressive physical, mechanical and thermal properties. Biodegradability and FTIR analyses of samples and SEM micrographs of tensile fractured surfaces as well as many other aspects of this research has been thoroughly detailed within this publication. ····· 1036120433
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Ziziphus jujuba is the most commonly grown fruit in Pakistan, having essential oil that can be utilized for the purposes of preservation like jujuboside and other flavoniides. In Pakistan it is used for the treatment of ulcers, wounds, eye diseases and bronchitis. Antioxidants are naturally occurring or synthetic substances which prevent oxidation or chemical reaction involving oxygen. The main focus of this investigation was to study the chemical constituents, antioxidant activity and phytochemicals present in the Ziziphus jujuba L. The results indicated that different extracts fractions from methanol, n-hexane, ethyl acetate and chloroform ranges from 20 to 100% concentration indicated that noticeable antioxidant properties were present in jujuba species that were determined by spectrophotometric techniques. The maximum antioxidant properties were observed in 100% chloroform and in M3 (60% methanol and 40% chloroform) and minimum were analyzed in E1 (20% ethyl acetate and 80% n-hexane) and M1 (20% methanol and 80% chloroform). The extraction techniques and extracting solvent were of great importance in this study that showed the extractability of various solvent. ····· 1036120426
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· 1 · ::::: · 19 ·· 20 ·· 21 ·· 22 ·· 23 ·· 24 ·· 25 · ::::: · 26 ·
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