The importance of source-dependent bioavilability in determining the transfer of ingested radionuclides to ruminant-derived food products

Article Abstract:

A radionuclide's bioavailability for transfer to animal products is the amount of absorption within the gastrointestinal tract. This is identified as the true absorption coefficient (A)(sub t). The transfer of radiocesium, radiostrontium, radioiodine, and plutonium to ruminant-derived food products is examined. With radiocesium, source-dependent bioavilability is a major parameter in determining the amount of contamination in the milk and meat ruminated livestock, but not with plutonium and radiostrontium, With radioiodine, the absorption should be considered complete regardless of the source.

Food & Kindred Products, Food Manufacturing, FOOD AND KINDRED PRODUCTS, Dairy Farms, Dairy Cattle and Milk Production, Statistical Data Included, Food industry, Dairy industry, Dairy products industry, Illustration, Environmental sciences

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Nitrogen and phosphorus imports to the Cape Fear and Neuse River basins to support intensive livestock production

Article Abstract:

With the increase in intensive livestock operations between 1985 and 1995, concerns for water quality also increased. Thus, the amounts of phosphorus and nitrogen excreted by hogs, turkeys, chickens, and cattle were studied. Most of these nutrients were imported from outside the region. So, this data was also incorporated into the study. Locally grown feed crops were also tracked. Already several accidental releases from holding ponds have produced algae blooms. Yet, the data shows that current waste management practices has prevented most of the nutrient from entering the rivers. The study did not examine contamination of ground water by seepage from farms or volatilization of ammonia.

North Carolina, Environmental aspects, Ammonia, Water pollution, Nitrogen (Chemical element), Nitrogen, Phosphorus, Phosphorus (Chemical element), Livestock

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Transfer of cadium and mercury to sheep tissues

Article Abstract:

A variety of exposure routes are responsible for the toxic introduction of toxic heavy metals such as mercury and cadmium to animal feeds. The need to predict the leval of presdence in animal tissue is important. Also it is necessary to determine how quickly an animal will decontaminate after the contaminant is removed from feed.

Primary nonferrous metals, not elsewhere classified, Primary Smelting and Refining of Nonferrous Metal (except Copper and Aluminum), Sheep and goats, Grain Mill Products, Animal Food Manufacturing, Cadmium, Mercury, Sheep Farming, Sheep, Specialty Animal Feeds, Safety and security measures, Pollution, Animal feeding and feeds, Nonferrous metal industry, Nonferrous metal industries, Pet supplies industry, Mercury (Metal), Mercury industry

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