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Streamlining Free Radical Green Chemistry (Hardcover): Tamara Perchyonok, Ioannis N. Lykakis, Al Postigo Streamlining Free Radical Green Chemistry (Hardcover)
Tamara Perchyonok, Ioannis N. Lykakis, Al Postigo
R2,454 Discovery Miles 24 540 Ships in 12 - 17 working days

The environmental and health hazards created by industrial chemicals and consumer products must be minimized. For safer products to be designed, the relationships between structure and toxicity must be understood at the molecular level. Green chemistry combined with free radical research has the potential to offer innovative solutions to such problems.

Some solutions are "greener then others," and many necessitate significant financial investment. New technology will only be adopted if real benefit can be shown and sometimes adaptation of existing methods is the best option. The efficiency of processes must be assessed, not only in terms of the final yield, but also cost, environmental impact and waste toxicity.

This practical and concise guide showcases the sustainable methods offered by green free radical chemistry and summarizes the fundamental science involved. It discusses the pros and cons of free radical chemistry in aqueous systems for synthetic applications. All transformation steps are covered including initiation, propagation, and termination. Useful background knowledge is combined with examples, including industrial scale processes for pharmaceuticals and fine chemicals.

The book helps chemists to choose appropriate methods for achieving maximum output using a modern, environmentally conscious approach. It shows that, armed with an elementary knowledge of kinetics, an understanding of the mechanistic and technical aspects, and some common sense, it is possible to harness free radicals for use in a broad range of applications.

Streamlining Green Free Radical Chemistry is aimed at chemists, engineers, materials scientists, biochemists and biomedical experts, as well as undergraduate and postgraduate students. It encourages readers to question conventional methods and move towards the "Benign-by-Design" approach of the future. References to further reading are provided at the end of each chapter.

Radical Reactions in Aqueous Media (Hardcover): Tamara Perchyonok Radical Reactions in Aqueous Media (Hardcover)
Tamara Perchyonok
R2,619 Discovery Miles 26 190 Ships in 12 - 17 working days

Chemists are now moving away from volatile, environmentally harmful, and biologically incompatible organic solvents. With its low cost, ready availability, and capacity to remove environmentally unfriendly by-products, water is an obvious replacement. Recent advances in free radical chemistry in water have expanded the versatility and flexibility of homolytic carbon-hydrogen, carbon-carbon, carbon-halogen, carbon-nitrogen bond formations in aqueous media. This textbook highlights the substantial progress which has been made in the last decade to "tame" the reactive free radical species in aqueous phase reactions. It describes carbon-hydrogen bond formations in aqueous media via radical reactions with a specific focus on HAT (Hydrogen Atom Transfer). Suitable for students of chemistry, industrial chemists and academic researchers, it combines extensive knowledge of free radical chemistry with the latest innovations and creative applications. Divided into five main areas, it covers the: generation of carbon centred free radicals; radical initiators; solubility of substrate; suitability of free radical hydrogen donors, and HAT reactions in aqueous media. The book describes radical reactions in organic and aqueous media and their applications in total synthesis, DNA structural probing, isotope labelling, living polymerization and various other applications. It shows that, armed with an elementary knowledge of kinetics and some common sense, it is possible to harness radicals into tremendously powerful tools for solving synthetic problems. Written with the needs of students in mind, it offers just the right level of detail for undergraduate study. All the basic principles and facts on each topic area are presented in a concise yet comprehensive style that is appropriate for both core and specialist courses. It provides a step-wise introduction, taking students from the basic principles of radical reactions through to their applications in industry and their role in biological and environmental processes. Case studies are used to illustrate reactions in landmark synthesis and problems, with outlined answers, test the reader's understanding. There are also suggestions for further reading.

Biomaterials & Designer Functional Applications in Oral Cavity (Hardcover): V. Tamara Perchyonok Biomaterials & Designer Functional Applications in Oral Cavity (Hardcover)
V. Tamara Perchyonok
R5,921 R5,121 Discovery Miles 51 210 Save R800 (14%) Ships in 12 - 17 working days

Dental biomaterials and natural products represent two growing research fields, revealing that plant-derived compounds may play a role not only as nutraceuticals in affecting oral health but also in improving physicochemical properties of biomaterials used in dentistry. Recently, the role of free radicals in healthcare has attracted tremendous interest in the field of medicine, dentistry and molecular biology. Free radicals can be either harmful or helpful to the human body. When there is an imbalance between input and output of free radicals, a condition called "oxidative stress" develops. To counteract oxidative stress, the body has protective antioxidant mechanisms, which aid in lowering the incidence of various human morbidities and mortalities. The implication of oxidative stress in the etiology of many chronic and degenerative diseases suggests that antioxidant therapy represents a promising avenue for treatment. Thus, various forms of antioxidants have been introduced as an approach to fight dental diseases and improve general gingival health. The implication of oxidative stress in the etiology of chronic and degenerative diseases as well as the body's protective antioxidant mechanisms and the role dietary antioxidants play, suggests that antioxidant therapy could act as a beneficial treatment. The aim of this book is to present all available data concerning and linking free radicals, antioxidants and bio-active scaffolds in the utilisation of vitamins, proteins and extracts rich in bio-active phytochemicals as an avenue for creating innovative dental biomaterials. These materials are capable of promoting genuine tissue/cell interface integration and gaining insight into molecular origin of the mechanism to combat oral diseases in vitro and eventually in vivo.

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