Search Results
Results 501 - 550 of 671
< 4 5 6 7 8 9 10 11 12 13 14 >
Casteel S W - - 1993
A sudden onset of bizarre neurologic dysfunction was found in 8 of 90 mixed-breed feeder calves. Seven other calves were dead, and 3 more died during the next week. A diagnosis of organochlorine toxicosis was made when rumen and abomasal contents from 1 of the calves revealed 22.4 and 20.6 ...
Waller K - - 1992
In September 1988 we investigated reports of seizures in persons who had eaten taquitos, a commercially prepared snack food. We identified and interviewed 5 persons with new-onset seizures within 12 hours of eating taquitos, all purchased during a 1-week period from a single store. Leftover taquitos were found to contain ...
Lu F C - - 1992
The principles and procedures for the assessment of the safety/risk of chemical used by the relevant WHO and EPA expert groups are outlined. The assessment in terms of acceptable daily intakes (ADIs) and reference doses (RfDs) of 25 pesticides is listed. The pesticides assessed are acephate, alachlor, amitrole, azinphos-methyl, benomyl, ...
Lopes J L - - 1992
The mussel Anodontites trapesialis (Lam, 1819) was used as an indicator of organochlorine pollutants in the Pardo River, located in the municipality of Ribeirão Preto (21 degrees 07'S and 47 degrees 45'W), State of São Paulo, Brazil. Biological monitoring was performed for one year at the site of a sugar ...
Wessel J R - - 1992
The Codex Committee on Pesticide Residues (CCPR), which is responsible for establishing maximum residue limits (MRLs) for pesticides on food, has a vital role in protecting the public health and facilitating international trade. Codex MRLs are based on scientific evaluations by expert panels that constitute the Joint FAO/WHO Meeting on ...
Bordas A - - 1992
1. Divergent selection was undertaken in a Rhode Island Red population for residual food intake, measured in males and females, using mass selection. 2. In the absence of a control line, selection response during 14 generations was estimated by the within-year divergence between lines. 3. The direct response in residual ...
Alawi M A - - 1992
Concentration of 15 organochlorine pesticides were determined by capillary gas chromatography in 59 human milk samples collected from the general population during 1989/1990 in the Jordanian capital of Amman. In addition to hexachlorbenzene (HCB), three groups of organochlorine compounds namely, DDT and its metabolites, hexachlorcyclohexane (HCH-isomers) and the cyclopentadiene group ...
Jonkman E J - - 1992
The qEEG was studied in groups of young and old workers exposed to solvents (house and industrial painters) and in a group of workers exposed to pesticides. Three methods were used: a quantified visual scoring system, the neurometrics method and a multivariate analysis of mean frequencies. Using the visual assessment ...
Singh P P - - 1992
Samples of air from rooms in a residential and rural environment, treated with either DDT or HCH at rates recommended for mosquito control under the National Malaria Eradication Programme of India, i.e. 2 and 3 g m-2, respectively, were analyzed for the residues of these insecticides. During the 8-month sampling ...
Winter C K - - 1992
Following an investigation of the relationship between pesticide tolerances and safety, it is concluded that pesticide tolerances are not relevant as safety standards. This conclusion is based upon the findings that theoretical exposures to legal levels of pesticides in the diet may pose greater than negligible risks, while exposures to ...
Tonogai Y - - 1992
Organophosphorus pesticides in 47 agricultural products imported at the Yokohama and Kobe Quarantine Station in 1990 were determined by FPD-GC and identified by GC-MS. Chlorpyrifosmethyl, malathion and fenitrothion were found in wheat (0.03-0.69 ppm), chlorpyrifosmethyl and fenitrothion in soy bean (0.02-1.03 ppm), chlorpyrifosmethyl in cherry (0.12-0.17 ppm), chlorpyrifosmethyl in pumpkin ...
Winter C K - - 1992
In this review, the process of dietary pesticide risk assessment has been presented and three major components of the process--estimation of pesticide residue levels, estimation of food consumption patterns, and characterization of risk based on a comparison of exposure estimates with toxicological criteria--have been identified. Each component of the process ...
Ferrer A - - 1991
Toxic epidemics have become a serious problem during the twentieth century, due mainly to the huge expansion over the last 50 years of the chemical industry, which has placed tens of thousands of new synthetic organic compounds in the human environment. In the particular case of chemical pesticides, their undiscriminating, ...
Mora M A - - 1991
Eight species of birds (129 individuals) were collected from three agricultural areas with long histories of pesticide use in northwestern Mexico. Plucked carcasses were analyzed for organochlorine (OC) pesticides and polychlorobiphenyls (PCBs). DDE was found in all of the samples and at higher levels than other OCs. Mean (geometric) DDE ...
Yess N J - - 1991
In 1990, under regulatory monitoring, a total of 19,962 samples of domestically produced food from all 50 states and Puerto Rico and imported food from 92 countries were analyzed by FDA for pesticide residues. Of these, 19,146 were surveillance samples, which are collected when there is no suspicion of a ...
Zilberman D - - 1991
Pesticides enhance agricultural productivity, but the environmental and health side effects of their use justify government regulation, a subject of continuing societal debate. Bans on pesticide use are the principal regulatory device used in the United States. The economic impacts of such bans depend on the availability of substitutes, supply ...
Urieta I - - 1991
A total diet study has been initiated in the Basque country (Spain), the purpose of which is to provide estimates of the average intake of both food contaminants and certain nutrients. The types and quantities of foods that make up the average Basque 'Total Diet' are based on the results ...
Minyard J P JP - - 1991
Findings of pesticide and related chemical residues are presented for 27,065 samples of foods collected and analyzed in 10 state food laboratories over 1988 and 1989 (fiscal years (FY) 88 and 89). These laboratories conduct food regulatory programs compatible with national programs of the U.S. Food and Drug Administration. Of ...
Yess N J - - 1991
Pesticide residues in foods are reported for the 4-year period 1982-1986 [fiscal years (FY) 83-86]. Results were summarized from the 2 complementary approaches that make up the Food and Drug Administration's (FDA) pesticide residue monitoring program. Under regulatory monitoring, which focuses on residues in raw agricultural commodities, a total of ...
Yess N J - - 1991
Pesticide residues in foods are reported for the 5-year period 1978-1982 [fiscal years (FY) 78-82]. Results were compiled from the 2 complementary elements that comprise the Food and Drug Administration's (FDA) program for monitoring pesticide residues in foods. Under regulatory monitoring, which focuses on residues in raw agricultural commodities, a ...
Daft J L - - 1991
Public concern over chemical residues in foods increased in the United States during the early 1980s. Potentially hazardous levels of ethylene dibromide (EDB), a relatively non-volatile fumigant, were detected in several finished grain-based products by governmental food-monitoring laboratories. As a result, the U.S. Environmental Protection Agency banned the use of ...
Kaufman B M - - 1991
Determination of the presence and levels of pesticide residues in food is fundamental in monitoring and regulatory programs. Residues are separated from the food matrix by solvent extraction, followed by cleanup steps. The residues are most often identified and quantitated by instrumental analysis, usually liquid or gas chromatography. Extraction and ...
Takahashi Y - - 1991
The disposition and elimination of sulfadimethoxine (SDMX) in the skin of broiler-chickens were investigated. The administration of SDMX, in drinking water, at a concentration of 1,000 ppm for 5 days demonstrated that the SDMX was eliminated much more slowly from the skin than from the other tissues or plasma. These ...
Saleh M A - - 1991
The chemistry of toxaphene is now well developed; 20 isomers have been isolated and identified. The molecular weight and molecular formula are known for the remaining major components. The major metabolic degradation mechanisms for toxaphene in all organisms from bacteria to primates are now believed to the reductive dechlorination, reductive ...
Iyaniwura T T - - 1991
The increase in world population and in demand for food and economic crops has put a pesticide burden on man and the environment. Pesticide residues from vector control and agricultural uses contaminate the terrestrial and aquatic surroundings and contribute to the pollution problem of the environment. Various human toxicoses have ...
Kagan YuS - - 1991
This review discusses the toxicological and hygienic aspects of the extensive increase in pesticide use, which has resulted in the great majority of people throughout the world being affected by their presence. The need for a broad exchange at an international level of the findings of toxicological and hygienic research ...
Tanabe S - - 1991
Raw foodstuffs collected from Bangkok, Thailand, were analysed for the presence of PCBs, DDTs, HCHs (BHCs). HCB, aldrin, dieldrin, heptachlor and heptachlor epoxide. Residues of PCBs and organochlorine pesticides were detected in all the samples analysed. Concentrations of PCBs did not reach the tolerance limit set forth by the US ...
Wessel J R - - 1991
Interest in pesticide residues in foods has increased, and the issue of residues in imported foods has been raised as a potential public health problem. Three U.S. government agencies, EPA, FDA, and USDA, are responsible for regulating pesticides. EPA sets tolerances, and FDA and USDA enforce those tolerances. As part ...
Okumura D - - 1991
California spends more than $40 million each year for the nation's most comprehensive program to regulate pesticide use: Pesticides are evaluated before they can be used. Businesses that sell or apply pesticides are licensed. Pesticide specialists enforce restrictions on pesticide use. Water, air, and soil are monitored for pesticide levels. ...
Ahmed M T - - 1991
Residues of organochlorine pesticides were monitored in the muscles of Bolti fish Tilapia zillii, the crab Lupa pelagicus and sediment samples collected from El Temsah lake around Ismailia using gas liquid chromatography. The beta isomer of hexachlorocyclohexane (beta.HCH) was the most dominant compound detected in all samples, followed by P, ...
Kramer R D - - 1990
The interrelationship of two extrinsic factors-nutrition and pesticide exposure-was studied in German cockroaches, Blattella germanica (L.). Amount of dietary protein had no effect on susceptibility of male German cockroaches to propoxur and chlorpyrifos; however, the source of protein produced significant changes in insecticide susceptibility. Increased total body lipids, carbohydrates, and ...
- - 1990
A total of 18,798 samples of domestically produced food from all 50 states and Puerto Rico and imported food from 88 countries were analyzed for pesticide residues in 1989. Of these, 18,113 were surveillance samples, which are collected when there is no suspicion of a pesticide problem. No residues were ...
Frank R - - 1990
Between 1986 and 1988, 433 composite vegetable samples representing 16 commodities were collected from farm deliveries to the marketplace in Ontario, Canada. All samples were analysed for insecticides and fungicides. The analyses included organochlorine, organophosphorus, synthetic pyrethroid, and N-methylcarbamate insecticides and dithiocarbamate, dicarboximide, and organochlorine fungicides. The commodities tested included ...
Goh K T - - 1990
An outbreak of food poisoning in which 105 persons from various parts of Singapore were affected was traced to one type of green leafy vegetable (Brassica alboglabra) that had been imported. The clinical symptoms were generally mild and the incubation period short (median 2.5 h). The etiology was confirmed when ...
Ip H M - - 1990
The movement of pesticides into and out of Hong Kong shows a high net gain of DDT and benzene hexachloride (BHC). 310 food samples were analyzed for total BHC and 1,854 food samples were analyzed for total DDT, total DDE, and total TDE. High levels of total BHC and total ...
Day K E - - 1990
A review of the scientific literature on pesticide residues in freshwater and marine zooplankton indicates that despite the great number of pesticides in current use, only residues of the persistent organochlorine insecticides, many of which have been restricted or removed from general use in North America, have been determined. Much ...
- - 1989
A total of 18,114 samples of domestically produced food from all 50 states and Puerto Rico and imported food from 89 countries were analyzed for pesticide residues in 1988. This compares with 14,492 samples in 1987, with imports from 79 countries. No residues were found in over 60% of the ...
Camoni I - - 1989
Levels of organochlorinated, organophosphate, dithiocarbamic, benzimidazolic, and phthalimidic compounds, as well as some other pesticide residues obtained from Regional Laboratories in the years 1983-1985, were assembled and presented as a part of a study aimed at evaluating food contamination. Approximately 2000 samples of vegetables, fruits, cereals, and food of animal ...
Arab J - - 1989
It has been suggested that incomplete or faulty processing leading to a high level of residual monomer is a factor in denture whitening. Laboratory tests which simulate the cleaning procedures used by patients presenting with whitened dentures have been carried out on specimen strips of acrylic denture base material with ...
Bryan T E - - 1989
Japanese quail eggs were injected with 1-(2-chlorophenyl)-1-(4-chlorophenyl)-2,2,2-trichloroethane o,p'-DDT(1-10 mg),1,1-bis(4-chlorophenyl)-2,2,2-trichloroethane p,p'-DDT (1-10 mg), or, in one study, 0.5 mg chlordecone dissolved in 50 microliters of corn oil on day 1 of incubation. Hatchability was not decreased by o,p'-DDT or p,p'-DDT, as compared to corn-oil-injected controls, but was reduced in progeny of ...
Elkins E R - - 1989
Commercial food processing operations such as washing, blanching, and cooking remove major portions of the pesticide residues that are currently permitted on the raw agricultural crop. These unit operations are reviewed for selected products, along with degree of residue removal at each step. For example, washing plus peeling removes 99% ...
Lombardo P - - 1989
The U.S. Food and Drug Administration (FDA) has carried out a large-scale monitoring program for pesticide residues in foods since the 1960s. The program has evolved continuously as evidenced by a number of recently incorporated modifications and initiatives. Included are greater emphasis on imports; increased and more specific targeting of ...
Maybury R B - - 1989
To protect consumers' health, most countries have maximum legal limits for pesticide residues in foods. Trade difficulties can arise when limits differ between countries. The Codex Alimentarius Commission was established in 1962 to implement the Joint FAO/WHO Food Standards Programme, the purpose of which is to protect consumer health and ...
Trichilo C L - - 1989
The U.S. Environmental Protection Agency (EPA) is responsible for setting tolerances for pesticide residues in food, under the authority of the Federal Food, Drug, and Cosmetic Act. The residue chemistry data required to set tolerances include metabolism in plants and animals, analytical methods, magnitude of the residue, and concentration in ...
Fan A M - - 1989
This report reviews recent developments regarding the environmental, toxicological, and regulatory issues surrounding pesticide residues in food. Factors affecting the establishment of regulatory limits are discussed. Pesticides monitored by state and federal agencies are compiled and the need for improvements in analytical techniques and enforcement procedures in governmental monitoring programs ...
Horsberg T E - - 1989
Three incidents with high mortality in Atlantic salmon after trichlorfon treatment against salmon lice are described. All 3 incidents occurred at water temperatures of 12 degrees C or higher. The mean brain acetylcholinesterase (AChE) activity of dead fish was less than 20% of normal activity, while survivors showed mean activities ...
- - 1988
A total of 14,492 samples of domestically produced and imported food from 79 countries were analyzed for pesticide residues in 1987. No residues were found in over 50% of the samples. When residues were found, they were usually at low levels and rarely exceeded tolerances. Most violative residues were found ...
Saunders J C - - 1988
Residues of veterinary products in food animals have been the subject of much debate in recent years. This paper attempts to define and classify what is meant by the term 'residue' and to discuss the toxicological significance of various types of residues and how they may be controlled to ensure ...
Singh P P - - 1988
Total diet samples, collected every 3 months during a period of 1 year, were analysed for DDT and BHC residues. The food items were purchased from retailers, prepared for eating according to local practices and divided into several food groups. The results show that average dietary exposure to DDT and ...
Di Muccio A - - 1988
The levels of o,p'-DDE, p,p'-DDE, o,p'-DDT, p,p'-TDE (DDD), and p,p'-DDT were determined in 19 samples of Dicofol formulations commercially available in Italy. The total of DDT-like compounds, calculated on a Dicofol content basis, was in the range 0.63-23.19%, with an average of 8.28%. Setting a requirement of minimum purity for ...
< 4 5 6 7 8 9 10 11 12 13 14 >