نتایج جستجو برای: acute exposure
تعداد نتایج: 781872 فیلتر نتایج به سال:
Background and purpose: Nanoparticles (NPs) are used in different industries, including electronics, pharmaceuticals, cosmetics, healthcare, and environmental processes. Therefore, it is necessary to evaluate their toxicity in the aquatic environment. Materials and methods: The acute toxicity of six different kinds of nano-sized particulates (SiO2, Fe2O3, Al2O3, TiO2, ZnO, and MgO) to Daphnia ...
Studies showed that stimulant drugs that affect the monoaminergic system alter both behavioral and cognitive processes. The aim of the present study was to investigate the impact of prenatal and acute methamphetamine (MA) exposure on cognitive functions of adult male rats tested in Morris water maze (MWM). We tested adult male rats prenatally exposed to MA (5 mg/kg), saline or no injection. Hal...
Organophosphate pesticides, especially chlorpyrifos, are one of the most widely used insecticides in agriculture, but their toxicity and potential sensitivity effects on Anura, Fejervarya limnocharis still unknown. The purpose this investigation is to study F. (Anura: Dicroglossidae) tadpole lethal (survivability) sublethal (morphological alterations swimming activity) chlorpyrifos Dursban 200E...
background: this investigation aimed to evaluate the in vitro scolicidal effects of pistacia khinjuk methanolic extract against protoscoleces of hydatid cysts and its acute toxicity in mice nmri model. methods: protoscoleces were aseptically extracted from sheep livers having hydatid cysts. various concentrations of the essential oil (12.5- 100 mg/ml) were used for 10 to 60 min. viability of pr...
background: astronauts will be exposed to both chronic space radiation and acute high doses of energetic radiation of solar particle events in long-term deep space missions. the application of radioprotectors in space missions has basic limitations such as their very short time window as well as their acute toxicity and considerable side effects. the aim of the present study was to investigate ...
Rylander, R. and Snella, M.-C. (1976). British Journal of Industrial Medicine, 33, 175-180. Acute inhalation toxicity of cotton plant dusts. The number of free lung-cells was studied in guinea-pigs after acute exposure to extracts of various cotton dusts. A good correlation was found between the increase in number of leucocytes in the airways and the number of Gram-negative bacteria in the diff...
Background: Pesticides are chemical compounds used against vectors of human and animal diseases as well as plant pests. This study was undertaken to assess pulmonary reactions, if any, associated with occupational exposure to pesticides. Methods: This was a cross sectional analytical study in which a group of 86 exposed (employees of a pesticide producing company) and 75 unexposed referent sub...
ABSTRACT Background and Objectives: Exposure to ionizing radiation in modern societies is inevitable and can cause a variety of adverse health effects such as cancer and birth defects. Therefore, a reliable, repeatable and sensitive method is required for evaluation of radiation exposure. The aim of this study was to determine the amount of hist...
s and Presentations Lasley, S.M. and Vietti, K.R. Acute exposure to uranium decreases potassium-stimulated hippocampal glutamate release. The Toxicologist 78, 1140, 2004. Lasley, S.M. and Vietti, K.R.N. Acute exposure to uranium in vitro decreases potassiumstimulated hippocampal glutamate release. Military Health Research Forum, San Juan, Puerto Rico, April 25-28, 2004. Lasley, S.M. and Vietti,...
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