نتایج جستجو برای: toxic concentration
تعداد نتایج: 447767 فیلتر نتایج به سال:
Pesticides intoxication has been implicated in many toxic diseases, and agricultural adjuvants including polyethylene glycols are used in a variety of applications including industrial manufacturing. The aim of this study was to analyze the effect of PEG-600 on the biochemical toxic effects of malathion, imiprothrin and imidacloprid on the basis of the determined LD50 values on the quails (Cotu...
The toxic effects of arsenicals are significantly modified by numerous biological and abiotic factors. The toxicity of arsenic in the environment is affected by temperature, pH, Eh, organic content, phosphate concentration, adsorption to solid matrices, the presence of other substances and toxicants, duration of exposure and the arsenic species present. In general, inorganic arsenicals are more...
Abstract Microbial degradation is an important process for removing many organic chemicals from natural waters. The estimation of biodegradability which reach the aquatic environment necessary in assessing hazard associated with their use. Phenol has industrial applications and it finds its way into wastewater streams. It toxic to several biochemical reactions. However, biological transformatio...
Introduction: Recent investigations have detected the presence of significant levels of heavy metals (chromium, lead and cadmium) in toys and other PVC products manufactured for children. In some countries, addition of compounds containing toxic metals to toys are limited or prohibited. Methods: To evaluate the safety of some of the plastic toys in the city of Isfahan with respect to toxic tr...
Puzzling situation of acetaminophen toxicity in a referral hospital, Tehran, Iran Acetaminophen carries a higher risk of overdose. A puzzling situation of acetaminophen toxicity was encouraging enough to explore the epidemiologic situation of acetaminophen toxicity and its outcomes among patients acquired poisoning. This cross-sectional study retrospectively reviewed the medical r...
Events leading up to the release of toxic chemicals in the processing plants are one of the main hazards of chemical industries that can endanger employees and also people in neighborhood. In this study, DOW's Chemical Exposure Index (CEI) is used to determine hazard distances of possible toxic chemical releases in one of the South Pars gas refineries. To...
Background and Objective: Nitrophenols are among the most common and toxic compounds in industrial effluents that 2, 4 dinitrophenol (2, 4-DNP) is the most toxic compound in this group. The object of this study was to optimize the removal of 2, 4-DNP by thermally activated persulfate using a central composite design. Materials and Methods: This study was performed on a batch thermal reactor w...
Effects of Glucose Concentrations on Cadmium, Copper, Mercury, and Zinc Toxicity to a Klebsiella sp.
The influence of glucose concentration on Cd, Cu, Hg, and Zn toxicity to a Klebsiella sp. was studied by following the degradation of C-labeled glucose at pH 6.0. Uptake of C into the cells was also determined. The carbon concentrations ranged from 0.01 to 40 mg liter, which are equivalent to soluble C concentrations in natural environments. The toxicity of Cu, Cd, and Zn to a Klebsiella sp. wa...
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