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Naturally-Produced Organohalogens

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Release : 2012-12-06
Genre : Science
Kind : eBook
Book Rating : 616/5 ( reviews)

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Book Synopsis Naturally-Produced Organohalogens by : Anders Grimvall

Download or read book Naturally-Produced Organohalogens written by Anders Grimvall. This book was released on 2012-12-06. Available in PDF, EPUB and Kindle. Book excerpt: Should the production and use of chlorine and all chlorinated organic compounds be halted, in view of their adverse effects on the environment and human health? Those in favour argue that certain chlorinated compounds (PCBs, DDT, CFCs, etc.) have large negative environmental effects. The use of chlorine in disinfectants leads to the production of chloroform, while bulk products (PVC) contribute to the production of chlorinated dibenzo-p-dioxins and dibenzofurans when they are burned. Those against argue that chlorine and many chlorinated compounds are essential in the control of human health (the prevention of disease transmitted through drinking water that has not been disinfected), and that chlorinated compounds are indispensable intermediates in many production processes, representing a vast economic value. But such discussions often ignore the fact that Nature contributes significantly to the production of chlorinated organic compounds. More than 1000 such compounds are known, and their contribution to the biogeochemical cycling of chlorine is underestimated. Chlorine is organically bound in large quantities to humic materials, and natural production mechanisms are known for low molecular weight compounds (methyl chloride, chloroform, chlorinated dibenzo-p-dioxins and dibenzofurans). The role of these compounds in the environment is largely unknown. Naturally-Produced Organohalogens gives a complete overview of the present state of knowledge on the subject, giving a much needed balance to the argument sketched out above.

Natural Production of Organohalogen Compounds

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Release : 2005-07-25
Genre : Science
Kind : eBook
Book Rating : 931/5 ( reviews)

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Book Synopsis Natural Production of Organohalogen Compounds by : Gordon W. Gribble

Download or read book Natural Production of Organohalogen Compounds written by Gordon W. Gribble. This book was released on 2005-07-25. Available in PDF, EPUB and Kindle. Book excerpt: This book summarizes the state-of-the-art knowledge on naturally occurring organohalogens, of which more than 3700 are documented. The chapters cover all aspects of this field, including the structural diversity and sources of organohalogens, the mechanisms for their formation and biodegradation, the clinical use of dichloroacetate, and the synthesis of the powerful anticancer chlorine-containing cryptophycin. Both biogenic and abiogenic sources of organohalogens are treated, the latter of which include volcanic emissions and abiogenic formation in soil. Halogenation in humans, fungi, and in the ocean are covered in separate chapters. Sources and biosynthesis of the relatively rare natural organofluorines are also discussed in this volume. By better understanding of the role nature plays in the area of organohalogens, we can more intelligently regulate the production, use, and disposal of man-made organohalogen compounds.

Naturally Occurring Organohalogen Compounds - A Comprehensive Update

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Release : 2009-12-02
Genre : Science
Kind : eBook
Book Rating : 231/5 ( reviews)

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Book Synopsis Naturally Occurring Organohalogen Compounds - A Comprehensive Update by : Gordon W. Gribble

Download or read book Naturally Occurring Organohalogen Compounds - A Comprehensive Update written by Gordon W. Gribble. This book was released on 2009-12-02. Available in PDF, EPUB and Kindle. Book excerpt: Despite the long association of organohalogen compounds with human activities, nature is the producer of nearly 5,000 halogen-containing chemicals. Once dismissed as accidents of nature or isolation artifacts, organohalogen compounds represent an important and ever growing class of natural products, in many cases exhibiting exceptional biological activity. Since the last comprehensive review in 1996 (Vol. 68, this series), there have been discovered an additional 2,500 organochlorine, organobromine, and other organohalogen compounds. These natural organohalogens are biosynthesized by bacteria, fungi, lichen, plants, marine organisms of all types, insects, and higher animals including humans. These compounds are also formed abiogenically, as in volcanoes, forest fires, and other geothermal events.In some instances, natural organohalogens are precisely the same chemicals that man synthesizes for industrial use, and some of the quantities of these natural chemicals far exceed the quantities emitted by man.

Naturally Occurring Organohalogen Compounds

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Release : 2023-07-24
Genre : Science
Kind : eBook
Book Rating : 293/5 ( reviews)

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Book Synopsis Naturally Occurring Organohalogen Compounds by : A. Douglas Kinghorn

Download or read book Naturally Occurring Organohalogen Compounds written by A. Douglas Kinghorn. This book was released on 2023-07-24. Available in PDF, EPUB and Kindle. Book excerpt: The present volume is the third in a trilogy that documents naturally occurring organohalogen compounds, bringing the total number — from fewer than 25 in 1968 — to approximately 8,000 compounds to date. Nearly all of these natural products contain chlorine or bromine, with a few containing iodine and, fewer still, fluorine. Produced by ubiquitous marine (algae, sponges, corals, bryozoa, nudibranchs, fungi, bacteria) and terrestrial organisms (plants, fungi, bacteria, insects, higher animals) and universal abiotic processes (volcanos, forest fires, geothermal events), organohalogens pervade the global ecosystem. Newly identified extraterrestrial sources are also documented. In addition to chemical structures, biological activity, biohalogenation, biodegradation, natural function, and future outlook are presented.

Naturally Produced Organohalogens

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Release : 2001
Genre :
Kind : eBook
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Book Synopsis Naturally Produced Organohalogens by : DECHEMA, Gesellschaft für Chemische Technik und Biotechnologie

Download or read book Naturally Produced Organohalogens written by DECHEMA, Gesellschaft für Chemische Technik und Biotechnologie. This book was released on 2001. Available in PDF, EPUB and Kindle. Book excerpt:

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