Methylmercury Contamination of Laboratory Animal Diets
نویسندگان
چکیده
منابع مشابه
Methylmercury Contamination of Laboratory Animal Diets
In the midst of research focusing on the neurodevelopmental effects of mercury vapor in rats, we detected significant levels of mercury (30-60 ng/g) in the blood of nonexposed control subjects. We determined that the dominant form of the mercury was organic and that the standard laboratory chow we used in our vivarium was the source of the contamination. The dietary levels were deemed of potent...
متن کاملVolatile nitrosamine contamination of laboratory animal diets.
A number of precautions were taken to ensure the accuracy of the analytical procedures and to avoid artifactual formation of N-nitroso compounds. NDPA (5 ng/g), an NDMA analog which is not normally present in the diets, was added to each powdered sample prior to the vacuum distillation step as an internal (recovery) standard. All reported levels of NDMA and NPYR have been adjusted for the recov...
متن کاملEffect of Gamma Irradiation on Microbial Decontamination, Crude Nutrient Content, and Mineral Nutrient Composition of Laboratory Animal Diets
Laboratory animal models are an important part of test design. Certain conditions such as microbial contamination in diets of these models could affect the results of experiments. One of the most important routes that predispose to contamination is generated through feeding of laboratory animals. This study aimed to show the effect of gamma irradiation in reducing bacteria concentrations,...
متن کاملBacterial contamination of enteral diets.
Enteral feeding solutions can be contaminated by bacterial micro-organisms already present in the ingredients, or introduced during preparation or transport, or in the hospital ward. During jejunostomy feeding without pump or filter, ascending bacterial invasion of the feeding bag is possible. In patients with lowered immune response contaminated feedings can cause serious septic clinical probl...
متن کاملLaboratory contamination of blood cultures.
A prospective study of the use of a laminar flow cabinet, an exhaust-ventilated safety hood, and the open bench for the microbiological examination of blood is described. Blood samples from 1600 patients were subcultured on the open bench, 2700 in a safety hood, and 2607 in a laminar flow cabinet. Use of the laminar flow cabinet produced a significantly greater level of contamination than the o...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Environmental Health Perspectives
سال: 2005
ISSN: 0091-6765,1552-9924
DOI: 10.1289/ehp.7816