für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray In the present work polyacrylamide (PAM), copolymer nanogels, nanosize composites of AM with silica and functionalized composites of AM & 2-acrylamido-2-methyl-1-propanesulfonic acid with silica have been prepared by inverse microemulsion polymerization, in which water/toluene inverse emulsion was used to make the product a fine powder. These nanostructures have been characterized by DLS, FTIR, H-NMR, Elemental analysis, TGA, DSC, SEM & TEM to determine their size, polydispersity, presence of functional groups, polymer chain composition, thermal stability, morphology and shape. As easy availability of microemulsion literature is a constraint, this book emphasize on detail literature survey on microemulsion polymerization (mechanism) preparation, properties & applications of nanogels, nano size composites. This book being comprehensive in synthesis & characterization could be helpful to UG / PG / research scholars for understanding the peculiarity and easy steps for microemulsion preparation, stabilization (with one / more surfactants / monomers) and in-situ polymerization. ····· 103611221
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Integrins are cell surface receptors that take part in cell cell adhesion and cell extracellular matrix (ECM) adhesion events as well as in cell migration and cell signaling. 5 1 integrins are expressed on a wide range among brain tumor cells. In this study, an intermediate spiroisoxazolinopyrrole of the most specific 5 1 integrin antagonist SJ749 was synthesized. Fischer esterification reaction, Swern oxidation, and Wittig olefination were performed. Next, fluorinated diaminopropionate molecules were synthesized for coupling to SJ749 instead of the (2,4,6-trimethylphenyl) diaminopropionate. Finally, the biological evaluation of the molecules synthesized was performed. These assays included cytotoxicity and cell proliferation. ····· 103611125
für 58.41€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Tetrahydro- -Carboline is often found in complex natural products and is frequently associated with biological properties, such as anti-cancer, anti-inflammatory, anti-HIV, anti-depressant, and for erectile dysfunction. Rauwolfia alkaloids are representative natural tetrahydro- -Carboline alkaloids. Reserpine is the most well known antihypertensive drug, derived from this type of alkaloids, which is included in the WHO Model List of Essential Drugs as an antihypertensive agent. Antioxidant & Antibacterial Activities of Tetrahydro- -Carbolines is a new book which provides an in-depth overview of chemistry, natural source, and medicinal value of various -Carbolines. This is an excellent review book present about various aspects of Tetrahydro- -Carbolines aimed to offer ready source for chemists, biologists, biochemists, nutrients, pharmaceutical chemists, and health care scientists. Each chapter is well organized and devoted with specific information. This book is written with care to meet the need for industries belongs to health care sectors. Further, this book is the best source of information, covering comprehensive knowledge and application of Tetrahydro- -Carbolines. ····· 10361733
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray This book deals with Biocides in papermaking chemistry. 13 most important (most widely used) biocide chemicals were selected and first the work includes a detailed description of their chemical and physical properties. After this a general overview of the methods suitable for the analysis of biocides is discussed. In this Thesis 28 additional priority biocides and their aquatic environmental risk assessment were also collected in a table. An interesting and compact description of environmental effects of biocides, including a brief summary of the so called green biocides is also presented, which will be important in future papermaking processes. ····· 10361602
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Eight new organotin(IV) complexes (3-10) with 2-acetylpyridine-N(4)-cyclohexylthiosemicarbazone [HPACT, (1)] and ten new organotin(IV) complexes (11-20) with 2-benzoylpyridine-N(4)-cyclohexylthiosemicarbazone [HBPCT, (2)] have been synthesized and characterized by various spectroscopic techniques and X-ray crystallography. In all the complexes (3-20), both ligands (1-2) are coordinated to the tin(IV) atom through the thiolato-S, azomethine-N and pyridine-N atoms, respectively. The X-ray study found that the all complexes are monomer and the central tin(IV) atom is six coordinated in a distorted octahedral geometry. The ligands (1-2) and their organotin(IV) complexes (3-20) were screened for their in vitro antibacterial and cytotoxicity. The screening results revealed that all these compounds have shown significant antibacterial and potential antitumor activity. Results of biological studies demonstrate that organotin(IV) derivatives are in general more active than the free ligands. In view of the diverse fields of applications, the results of wood decay resistance test showed that the novel organotin(IV) treated wood increased the duration of protection against biodegradation. ····· 10361589
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The development of fuel cells over the last century has been heavily influenced by external factors. Initially, fuel cells were seen as an attractive means for the generation of power because the efficiencies of other technologies were very poor. However, as the efficiency of these other technologies rapidly improved, the interest in fuel cells faded. Then, in 1950 s fuel cells were rapidly developed for application in space. More recently, significant technical progress in fuel cell technology has made fuel cells appear more viable than ever for a variety of applications. Additionally, concerns about renewable energy resources and the environment have increased interests in generating power with even higher efficiencies and lower emissions, and this has also raised the interest in fuel cells. Although some interesting work was done on fuel cells during the first half of the 20th century, Sir Francis Bacon began his historical work on fuel cells in 1933 and developed a hydrogen-oxygen cell that operated at moderate temperatures using alkaline. ····· 10361452
für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Crude oil production under deep water presents serious operational problems its main implication is the paraffin blockage with serious economical consequences due to possible obstruction of flow pipes or production lines. Also, there are an increasing number of crude oil fields that produce both crude oil and water, naturally occurred or injected as a second stage recovery to maintain the reservoir operating pressure and fluid flow profile. The water in crude oil emulsion so produced will then be stabilized by the variety of surfactant indigenous to the crude oil called emulsifying agent. It is more economic to separate water before transportation. Polymers have been used extensively in the petroleum industry as pour point depressant and demulsifiers for economical transportation of crude oil since the former can prevent the deposition in the pipe lines which may cause blockage of the transportation lines. Demulsifiers are class of surfactants used to destabilize the emulsions by reducing the interfacial tension at the emulsion interface, often by neutralizing the effect of the other, naturally occurring surfactants which are stabilizing the emulsion. ····· 10361422
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray From the begging of the nanotechnology era, it was essential part to create new nano efficient material that should be used as multifunctional devices. The problem keeping in my mind, an advanced material organic-inorganic nano-composite electrically semiconducting cation-exchanger for preparation, phisico-chemical characterization and their tremendous applications has been discussed as compilation work in the form of a book. We discussed some electrically conducting ortho derivatives of aniline as, tolidine, anisidine with inorganic cation exchanger having some metals with phosphate group viz. thorium (Th), tin (Sn). The main objective of our proposed work is to explain advance class organic-inorganic hybrid materials and how to apply these materials in analytical and electro analytical applications. ····· 10361395
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Heterocycles play an important role in biochemical processes because the side groups of the most typical and essential constituents of living cells are based on aromatic heterocycles. The presence of heterocycles in biology, pharmacology, optics, electronics, etc. is very well known. Between them, sulfur and nitrogen-containing heterocyclic compounds have maintained the interest of researchers through the development of organic synthesis. Furthermore, azole antifungal agents are the largest class of antimycotics available today. Fused and pendent heterocyclic rings are a ubiquitous feature of many pharmaceutical products. ····· 10361351
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Chemical characterization of archaeological common wares is important in order to make quantitative explanations about history and trade relations of nations. Chemistry uses a microscopic point of view by applying spectroscopic methods rather than macroscopic studies that archaeologists usually deal in the structural analysis. The present study is done on the common ware samples which were made of raw clays from Demirci, Sinop, Black Sea Coast of Turkey, because of the geopolitical importance of this region having trade routes. Elemental and mineralogical analyses of the clay-originated common ware samples found in the archaeological excavations and of the clay taken from Demirci region, which locates at almost 15 km southern of Sinop, were made. While the elemental compositions of the samples were obtained by X-Ray Fluorescence, the mineral structures were investigated by Powder X-Ray Diffraction and FT-IR spectroscopy. Furthermore, the characteristic reactions that the clays experienced were determined by Thermal Gravimetric Analysis.In addition, chemometric techniques using statistical methods,e.g. the standard clustering method and principal component analysis was also applied. ····· 10361349
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The organometallic chemistry of tin and lead, particularly the investigation of the compounds with direct metal-carbon bond, is an attractive research field, the interest shown by the international scientific community on this topic being justified by the outstanding results obtained in a large variety of areas, both of fundamental (the nature of the metal-carbon bond, unusual organometallic species, ligands in the coordination chemistry of the transition metals, supramolecular associations, etc.) and applied interest (polymerization catalysts, specific reagents in organic synthesis, precursors for unconventional materials, biologically active compounds, etc.). The current work presents an overview of the research in the field of hypervalent tin and lead compounds until 2003 and the synthesis and characterization, both in solution and solid state, of some new hypervalent tin and lead compounds, with detailed description of intra- and intermolecular interactions and experimental work. ····· 10361346
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The present book comprises three parts, Part-A, Part-B & Part-C. Part A describes the isolation and structure elucidation of three new compounds from Cotoneaster racemiflora Desf. In addition seven known compounds have also been described which are reported for the first time from this species. Part-B describes the isolation and structure elucidation of two new compounds from the whole plant of Buddleja crispa Benth. In addition, three known compounds have also been described, which are reported for the first time from this species. Part-C described the synthesis of macrocycle -sheet (monovalent and divalent Tau peptide) that inhibits aggregation of Alzheimer`s related peptides. ····· 10361212
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Polymer nanocomposites refer to a broad range of composite materials with polymer acting as the matrix and any nanomaterial acting as the filler. Due to unprecedented improvement observed in properties of the nanocomposites, research interest in this area has grown exponentially in recent years. In designing better nano-composites for advanced technological applications we face several major challenges. In this book, we have utilized first principle calculations, atomistic simulations, coarse-grained modeling and constitutive equations to develop structure-property relationships for an amorphous aromatic piezoelectric polyimide substituted with nitrile dipole, carbon nanotubes and resulting nanocomposites. In particular we have studied the thermal, mechanical and dielectric properties of the polyimide, nanotube and their nanocomposites through multi-scale modeling technique. Notably, we have investigated the time dependent response of these highly complex polymers, to our best knowledge this is the first of its kind. We expect the results obtained and understanding gained through modeling and simulations may be used in guiding development of new nanocomposites. ····· 10361195
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Moxifloxacin is a fourth generation fluoroquinolone has potent activity against Gram-positive bacteria, especially against pneumococcus and anaerobes, and still retain excellent activity against aerobic Gram-negative pathogens. I developed different methods for simultaneous determination of quinolones with different interacting drugs and performed drug-drug and drug-metals interactions by using these methods. We have synthesized derivatives and metal complexes of quinolones and characterized by physicochemical and spectroscopic methods (FT-IR, 1HNMR and mass spectrometry). The in-vitro antibacterial and antifungal activities of resulting complexes and derivatives were also performed and compared with the parent drug. Enzymatic activities of all synthesized compounds were carried out against different enzymes including urease, carbonic anhydrase, and -chymotrypsin. ····· 1036188· 1 · ::::: · 19 ·· 20 ·· 21 ·· 22 ·· 23 ·· 24 ·· 25 · ::::: · 26 ·
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