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861.
Wray Winterlin Charles Mourer Gregory Hall F. Kratzer George L.H. Weaver L.F. Tribble 《Journal of environmental science and health. Part. B》2013,48(2):209-224
Abstract Broiler chickens and swine fed furazolidone in their diet were sacrificed, and samples of liver, kidney, skin/fat and muscle were harvested and analyzed for furazolidone residue. Chickens fed 200 g of furazolidone/ton of feed were withdrawn from treatment 21, 14, 7, 5, 3, or 0 days before slaughter. Birds withdrawn from medication more than 5 days prior to slaughter had no residues in any of the tissues sampled. One of the 12 birds in each of the 5 day and 3 day withdrawal groups had detectable residues in the skin/fat. Seven of the 12 birds in the 0 day withdrawal group had residues of <2 ppb in skin/fat samples. Chickens fed 400 g furazolidone/ton of feed were withdrawn from treatment 0 days before slaughter. Residues of 0.7 to 3.5 ppb were found in the skin of these birds; residues were not found in other tissues. Swine were fed 300 g furazolidone/ton of feed for 2 weeks or 150 g/ton for 5 weeks. They were withdrawn from treatment 10, 7, 5, 3, or 0 days before slaughter. Tissue samples taken from these swine did not contain detectable furazolidone residues. 相似文献
862.
863.
George A. Cleeves Thomas J. Lemmons Clarence A. Clemons 《Journal of the Air & Waste Management Association (1995)》2013,63(4):207-211
A captive-balloon borne radio transmitting device measuring temperature and humidity at desired levels in the lower thousand feet of the atmosphere over a city is described. A companion device which captures a sample of air at a desired altitude and a method of later determining trace gas concentrations in the sample is presented. Temperature, humidity, and methane concentrations in air samples taken above Cincinnati were-determined and are presented as examples of the system’s capabilities. 相似文献
864.
George H. Farrah 《Journal of the Air & Waste Management Association (1995)》2013,63(11):738-741
Manual methods for the determination of air-borne fluorides, including the discrimination of gaseous and particulate forms, have been reviewed. Published methods have been re-examined and comparative sampling data presented, to point out advantages of some newer techniques in sampling, separation, and quantitation. 相似文献
865.
Joseph H. Somers George D. Kittredge 《Journal of the Air & Waste Management Association (1995)》2013,63(12):764-769
The information presented in this paper is directed to persons concerned with control of exhaust odors from diesel-engine-powered vehicles. This paper summarizes projects sponsored by the Environmental Protection Agency (EPA) over the past years in the field of diesel-exhaust odor. These investigations have concentrated on developing measurement methods for quantifying different odor levels, evaluating various odor control methods, and evaluating public opinions of such odors. A human panel method using odor reference standards has been found suitable to measure these odor levels. In addition to this technique, chemical characterization work has been sponsored under a project jointly sponsored by the Coordinating Research Council and the EPA to isolate and identify those species responsible for the odor. Knowledge of these odorous compounds and the techniques necessary to isolate them should lead to development of a chemical method to measure this type of odor, in place of human panelists. Such basic information would also lead to developing control techniques to minimize this odor. Several control techniques were evaluated for diesel exhaust odor. To date, the most effective method is an improved needle injector for use in the Detroit Diesel type E 6V-71 engine commonly used in buses. Finally, public reaction to diesel-engine-exhaust odor has been measured. It has been found that a systematic relationship exists between increasing public objections and increasing diesel odor intensity. 相似文献
866.
867.
Ralph E. George Julien A. Verssen Robert L. Chass 《Journal of the Air & Waste Management Association (1995)》2013,63(11):847-855
Pollution from jet aircraft is not a problem confined only to Los Angeles County but one which is of interest and concern wherever a major airport exists. Jet traffic at Los Angeles International Airport has increased from 80 flights daily in 1959 to nearly 1000 a day. This number will more than double in the next decade and its air pollution potential will increase in about the same proportion. The Air Pollution Control District investigated this new source of air pollution in Los Angeles County in 1959. In the absence of any previous research evidence or other information which would allow an evaluation of contaminant emissions from jet aircraft engines, it was necessary to develop original and novel test methods. These tests provided a starting point for a new study in 1968, to update the initial investigations and expand on them to include testing of emissions from a new generation of turbofan, as well as late model turbojet and turboprop engines. The primary interest of this study was to obtain as complete and comprehensive information as possible on the kinds and quantities of air contaminants emitted by jet aircraft, particularly at the Los Angeles International Airport. Equally important were the investigations on possible approaches to control of jet aircraft pollution, as well as the decisions as to the scope of the District’s legal jurisdiction in the field of aviation. 相似文献
868.
869.
John Salop George F. Maier 《Journal of the Air & Waste Management Association (1995)》2013,63(12):1217-1220
During the summer of 1976, a comparison was made between ozone measurements for a coastal industrial concentration area (Norfolk/Virginia Beach, Virginia) and an offshore station (Chesapeake Light Station, 15 miles out to sea). The anticipated dominance of high offshore ozone readings with offshore flow was not observed. A surprising number of high O3 concentrations were observed at both the offshore and land sites with northeasterly and easterly winds. This suggests that the phenomenon of long range transport of contaminants from highly urbanized centers in the northeast to the mid-Atlantic states via an offshore sea route must be given careful consideration. The body of information presented in this paper points out the need for a clearer understanding of the complex urban/rural O3 problem coupled with transport effects before costly control strategies are to be implemented. 相似文献
870.