Thiadiazoles: Advances in Research and Applications, Alberto Cohen

Автор: Oliver Turk
Название: Plastics: The Environmental Issue
ISBN: 3110641399 ISBN-13(EAN): 9783110641394
Издательство: Walter de Gruyter
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This book gives a holistic picture on the application and resulting issues of plastics, that last a long time but at the same time remain a long time in the environment. It is intended to combine chemical fundamentals with value chain and regulatory aspects as well as risks. The text aims to provide inspiration for future material developments and concepts for material usage in the future that is more sustainable.

Название: Nitroxide Mediated Polymerization: From Fundamentals to Applications in Materials Science
ISBN: 1782620613 ISBN-13(EAN): 9781782620617
Издательство: Royal Society of Chemistry
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Описание: The first book dedicated to nitroxide-mediated polymerization and covers the history and development of NMP, as well as current techniques of academic and industrial interest.

Автор: Mariusz Szymczak, Osman Topuz
Название: Acetic Acids: Advances in Research and Applications
ISBN: 153613550X ISBN-13(EAN): 9781536135503
Издательство: Nova Science
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Описание: Advances in Research and Applications.

Автор: Tomos Fisher
Название: Organic Polymers: Advances in Research and Applications
ISBN: 1536148644 ISBN-13(EAN): 9781536148640
Издательство: Nova Science
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Описание: In this compilation, examples of film polymeric composites based on azobenzene polymers and metallic complexes for use in electro-optical modulators and recording media for polarization holography are considered. It is shown that the information characteristics of the investigated media are mainly influenced by the structure of the azobenzene groups (electron-donor and electron-acceptor substitutes) and by the supramolecular structure of the polymers. Following this, precise analyses of the molecular arrangement of three-dimensional crystals, two-dimensional molecular films, and interfacial particle layers of polyguanamine derivatives with a high refractive index are been performed. It is determined that the high refractive index of the polyguanamine derivatives is not caused by the chemical structure of the molecule, but is based on the packing of molecular chains or the refraction of transmitted light due to the difference in electron density between the crystalline and amorphous regions. In the closing chapter, organic-inorganic hybrid polymers are applied in different fields, including adsorption of metals from aqueous media. In this context, two organic-inorganic hybrid polymers were prepared by sol-gel method, using proportions of 1:1 and 1:3 of the monomer 1-vinylimidazole and the silane agent 3-mercaptopropyl-trimethoxysilane, respectively, in order to evaluate the proportion effect of VI and MPTMS on Hg2+ ions adsorption from an aqueous solution.

Автор: Davor Margetic
Название: Cycloaddition Reactions: Advances in Research and Applications
ISBN: 1536154202 ISBN-13(EAN): 9781536154207
Издательство: Nova Science
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Описание: Chapter 1 reviews recent progress in aryne cycloaddition reactions. The important contributions to the methodology of preparation of arynes in mild reaction conditions are described. Among them, the in-situ generation of arynes via the reaction of ortho- OTMS aryl triflates with fluoride ions is the most applicable. By this method, a variety of arynophiles was employed in the synthesis of nitrogen and oxygen containing 5-7 membered heterocycles. Instructive examples of applications in the total synthesis of natural products (radermachol, (±)-tylophorine, calothrixins, tubingensin B, (+)-hinckdentine A, cossonidine and (methyl)teretifoliones B) are presented. The importance of O-trimethylsilylaryl triflates and fluoride ions methodology for aryne generation is demonstrated in preparation of bioactive molecules and their applicability in medicinal chemistry research. Chapter 2. In addition to thermal reactions, photocycloaddition reactions are a complementary tool in synthetic organic chemistry. The employment of photochemical cycloaddition reactions proceed through different reaction mechanisms and provide access to products which could not be obtained in classical reaction conditions. This chapter is a review of excited state transformations of heterostilbenes to polycyclic structures featuring bicyclo[2.1.1], bicyclo[3.1.0] and bicyclo[3.2.1] moieties. Alongside the main products of these types, often unexpected transformations take place. Some of the photocycloaddition products display interesting biological activity. Chapter 3 reports the results of original scientific research with regards to the application of click reactions in the synthesis of 1,4-disubstituted 1,2,3-triazole conjugates with ribofuranosides and reversed nucleosides. An efficient method for the synthesis of 1,2,3-triazole bridged glycoconjugates with potential biological activity is described and fully supported with the 1H and 13C NMR spectroscopy of novel products. Chapter 4 is a comprehensive review of isocyanide-based cycloaddition reactions. This functionality is highly reactive and participates in many different cycloaddition reactions and annulations. Employment of isocyanide cycloaddition reactions led to the preparation of diverse heterocyclic structures, including asymmetric ones and their applications in medicinal chemistry, in the agricultural, chemical, and supramolecular fields, as well as in the materials sciences. Chapter 5 gives a review of the synthesis of 1,5-benzodiazepine-2,4-dione derivatives via 1,3-dipolar cycloaddition reactions. Functionalization of 1,5-benzodiazepine-2,4-dione by the cycloadditions of nitrilimines, nitrile oxides or azides led to diverse heterocyclic substitutions at positions 1, 3 and 5. Molecular structures of novel products were confirmed by X-ray crystal structure analyses. Chapter 6. Nitrile imines, nitrile oxides and azides were employed in 1,3-dipolar cycloaddition reactions with allyl and propargyl substituted 1,5-benzodiazepine, quinoxaline-2-thiones, benzimidazole and isatin to afford derivatives with heterocylic substituents: pyrazol, isoxazol and triazol. Single crystal X-ray studies of novel products were described, and their biological activity was also reported. Chapter 7. Guanidines are commonly occurring in nature and constituents some natural products with cyclic structures. Various cycloaddition reactions leading towards cyclic guanidine structures were reviewed. The review also summarized cycloaddition reactions in which functionalized guanidines were acting as the reaction partners.

Автор: Deepak Pathania, Bhuvanesh Gupta
Название: Advances in Polymers for Biomedical Applications
ISBN: 1536136123 ISBN-13(EAN): 9781536136128
Издательство: Nova Science
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Описание: Polymers have generated considerable interest in a large number of technologically important fields such as human healthcare systems. Polymers represent a very important domain of materials and have become an integral part of day to day human life. Polymers exist in nature; they have been and continue to be an integral part of the universe. This book is intended for scientists and researchers to use in their research or in their professional practice in polymer chemistry and its biomedical applications. Multiple biological, synthetic and hybrid polymers are used for multiple medical applications. A wide range of different polymers are available, and they have the advantage to be tunable in physical, chemical and biological properties and in a wide range to match the requirements of specific applications. This book gives a brief overview about the introduction and developments of polymers for different applications. The biomedical polymers comprise not only bulk materials, but also coatings and pharmaceutical nano-carriers for drugs. The surface modification of the inorganic nanoparticles with a physically or chemically end-tethered polymer chain has been employed to overcome the problems associated with the polymers. Chemically attached polymer chains not only stabilize the inorganic nanoparticles, but also lead to photosensitivity, bioactivity, biocompatibility and pharmacological properties in the composites. Polymer encapsulated silica nanocomposites (mesoporous) have potential applications in different fields, such as optics, bio-catalysis, microelectronics bone tissue engineering, coatings cosmetics, inks, agriculture, drug release systems, diagnoses, enzyme imaging, temperature-responsive materials, and thermosensitive vehicles for cellular imaging. Polymer grafted nanosized particles are known to have excellent properties such as good dispersion ability in solvents and polymer matrices. Polymer-based controlled drug delivery systems have some specific advantages, such as improved efficiency and reduced toxicity. The incorporation of a thermoresponsive polymer layer often enhances protein absorption and specific biomolecular tagging through hydrogen bonding. As a result, the nanocomposite gets cleared from the body at a faster rate (blood residence becomes low). This book is composed of fourteen edited chapters; it is intended for scientists and researchers to use in their research or in their professional practice in polymer chemistry and its biomedical applications.

Автор: Loh Xian Jun
Название: Polymers for Personal Care Products and Cosmetics
ISBN: 1782622950 ISBN-13(EAN): 9781782622956
Издательство: Royal Society of Chemistry
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Описание: All aspects of the personal care industry will be comprehensively discussed in Polymers for Personal Care Products and Cosmetics.

Автор: DeRosa, Thomas F.
Название: Patent Applications - A Tool for Identifying Advances in Polymer Chemistry R and D
ISBN: 0470472286 ISBN-13(EAN): 9780470472286
Издательство: Wiley
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Цена: 216430.00 T
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Описание: Covering patent literature and process improvements in twenty-two polymer subject areas, this book provides researchers with current polymer research not yet published in journals or patents. Moreover, the review and analysis by the author provides a more thorough understanding and concise package of the patent application.

Автор: Christoph Saal, Anita Nair
Название: Solubility in Pharmaceutical Chemistry
ISBN: 3110545136 ISBN-13(EAN): 9783110545135
Издательство: Walter de Gruyter
Цена: 127630.00 T
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This book describes the physicochemical fundamentals and biomedical principles of drug solubility. Methods to study and predict solubility in silico and in vitro are described and the role of solubility in a medicinal chemistry and pharmaceutical industry context are discussed. Approaches to modify and control solubility of a drug during the manufacturing process and of the pharmaceutical product are essential practical aspects of this book.

Автор: Bubun Banerjee, Rakesh Kumar Sharma
Название: Carbon-Carbon and Carbon-Heteroatom
ISBN: 3110759497 ISBN-13(EAN): 9783110759495
Издательство: Walter de Gruyter
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Carbon-carbon and carbon-heteroatom bond-forming reactions are the backbone of synthetic organic chemistry. Scientists are constantly developing and improving these techniques in order to maximize the diversity of synthetically available molecules. These techniques must be developed in a sustainable manner in order to limit their environmental impact. This book highlights green carbon-carbon and carbon-heteroatom bond forming reactions.

Автор: Martha Coleman
Название: Beta-Glucans: Applications, Effects & Research
ISBN: 1536106283 ISBN-13(EAN): 9781536106282
Издательство: Nova Science
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Описание: Polysaccharides (β-D-glucans) are a group of compounds belonging to the class of agents known as biological response modifiers, and have a potential therapeutic role in atherosclerosis, inflammatory diseases, and cancer. β-(1→3)-Glucans can be cellular structural polysaccharides or polysaccharides secreted on the surfaces of mushrooms or fungi. There are many types of β-glucans from different sources; some of them have been studied more precisely as potential therapeutic compounds for medical applications. The authors of this book review and discuss new research on the applications and effects of beta-glucans.

Название: Drug Delivery Technology
ISBN: 3110746794 ISBN-13(EAN): 9783110746792
Издательство: Walter de Gruyter
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Bioenhancers have been used in Ayurveda historically and are now being investigated for their pharmacological effi cacy. Herbal bioenhancers work on the gastrointestinal tract to improve absorption and drug bioavailability by acting on the drug metabolic process. Many herbal drugs show low activity due to their poor lipid solubility or improper molecular size. Piperine, gingerol, naringin, quercetin, niaziridin, glycyrrhizin, allicin, curcumin, genistein and others are able to enhance the bioavailability of active pharmaceuticals. This book details various facets of herbal bio-enhancers in a single comprehensive text.