939 resultados para Physiological effects of radiation Physiological effects of radiation
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Thesis statement on label affixed to inside front cover.
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National Highway Traffic Safety Administration, Washington, D.C.
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Federal Highway Administration, Washington, D.C.
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National Highway Traffic Safety Administration, Washington, D.C.
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The objective of this study was to determine the effects, if any, of sublethal concentrations of suspended materials on the fish in estuarine systems. Experimental sediment suspensions reproduced the concentrations frequently found during flooding and at dredging sites and dredged-material disposal sites. The suspensions were of natural sediment, obtained from the Patuxent River estuary, Maryland, or commercially available Fuller's earth. Fish were collected in the Patuxent River estuary and transported to the laboratory. The selected fish species inhabited ecologically different sections of the estuary; therefore, the overall reactions of each species were unique. Seven species of estuarine fish were exposed to Fuller's earth and natural sediment suspensions for timed periods and hematological changes were noted. The effects of various concentrations of Fuller's earth suspensions on white perch gill tissue were determined. Oxygen consumption rates of striped bass, white perch, and toadfish were measured in filtered Patuxent River water and compared to consumption rates in filtered river water suspensions of Fuller's earth or Patuxent River sediment. Fish showed signs of stress in response to suspended sediments in most of the experiments. Results indicate that sublethal concentrations of suspended solids can affect estuarine fish.
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Project SEDAN.
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Project SEDAN.
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Stanford Research Institute conducted this study to provide information to assist the Atomic Energy Commission in preparing a research and development program leading to the commercial application of radiation pasteurization for selected fruits and vegetables. Under the Quartermaster Corps' extensive program of research on irradiated foods, the five fruits and vegetables (strawberries, peaches, citrus fruits, grapes and tomatoes) of interest to the AEC have been irradiated experimentally. Results are inconclusive, but there are indications of both shelf-life extension and unfavorable radiation effects observed at dose levels below 500,000 rads.
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Supplement to National nuclear energy ser., Div. 8, v. 8.
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Technical reports no. 2, 4 published also as dissertations, University of Michigan, in microfilm form.
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"June 30, 1963."
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"September 30, 1963."
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Mode of access: Internet.
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Mode of access: Internet.
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UCD 102.