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The Friend
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Understanding our Environment
This 2nd edition of Understanding Our Environment has been reworked and greatly updated, providing a modern introductory level text for students of pollution and environmental chemistry. The book describes the basic concepts in relation to the chemistry of the atmosphere, freshwaters, oceans and soils, as well as the ways in which pollutants behave in these media (exemplified by case studies based upon topical environmental problems). It also examines the transfer of pollutants between different environmental compartments, the monitoring of the environment, the ecological and human health effects of chemical pollution, economics and regulatory control. Again case studies are used throughout. This unique introductory text is essential reading for students on undergraduate and first year postgraduate courses dealing with pollution and environmental chemistry, as well as for scientists and engineers in industry, public service and consultancy who require a basic understanding of environmental processes.
Essentials of Medical Geology
This authoritative reference volume emphasizes the importance and interrelationships of geological processes to the health and diseases of humans and animals. Its accessible format fosters better communication between the health and geoscience communities by elucidating the geologic origins and flow of toxic elements in the environment that lead to human exposure through the consumption of food and water. For example, problems of excess intake from drinking water have been encountered for several inorganic compounds, including fluoride in Africa and India; arsenic in certain areas of Argentina, Chile, and Taiwan; selenium in seleniferous areas in the U.S., Venezuela, and China; and nitrate i...
The Metabolism of Arsenite
Up to 200 million people in 70 countries are at risk from drinking water contaminated with arsenic, which is a major cause of chronic debilitating illnesses and fatal cancers. Until recently little was known about the mobility of arsenic, and how redox transformations determined its movement into or out of water supplies. Although human activities contribute to the release of arsenic from minerals, it is now clear that bacteria are responsible for most of the redox transformation of arsenic in the environment. Bacterial oxidation of arsenite (to the less mobile arsenate) has been known since 1918, but it was not until 2000 that a bacterium was shown to gain energy from this process. Since th...
National Union Catalog
Includes entries for maps and atlases.
Arsenic Exposure and Health Effects IV
This collected volume of authoritative articles represents the state-of-the-art in arsenic research. Arsenic experts from around the world, participants in the Fourth International Conference on Arsenic Exposure and Health Effects organized by the Society of Environmental Geochemistry and Health in 2000, present their critical findings.A vital contribution to arsenic study and policy making, this volume examines the global impact of the toxin and discusses arsenic in the environment, mechanisms of arsenic metabolism and carcinogenesis, water treatment technology, and medical care. Arsenic Exposure and Health Effects offers informed, challenging insights into a highly important and controversial topic.
The Westonian
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Who Owns Whom
The thirteenth edition of McGregor's Who Owns Whom presents a summary of the annual report of every company listed on the Johannesburg stock exchange, plus those on the stock exchanges of Harare, Windhoek and Gaberone. For each company, the data presented include: ultimate controlling shareholder, shareholders above 1%, directors, addresses of registered offices, nature of business, year end, number of employees, capital structure, financial statistics and ratios, subsidiaries, associated companies and investments. Comprehensive indexes reveal the ownership of approximately 16,000 companies, the share portfolios of major S.African investors, and the cross-directorships of 4000 directors of listed companies. Detailed schedules provide additional data including newly listed companies, companies recently delisted, companies categorised by sector, companies listed by financial year end, company name changes, unit trusts, mines working results, and much more.
