نتایج جستجو برای: determination of chemicals
تعداد نتایج: 21173121 فیلتر نتایج به سال:
The simultaneous determination of trace amounts of endocrine disruptors such as bisphenol A (BPA) and its monochloro, dichloro, trichloro and tetrachloro derivatives in wastewater has been developed using gas chromatography-mass spectrometry (GC-MS). Compounds were previously extracted from the aqueous samples using a liquid-liquid extraction procedure with a mixture of dichloromethane:carbon t...
background: this paper describes the common hazards in the metal industry – chemicals and noise. the aim of the study was to get an overview of risk levels of mentioned occupational hazards and examine the implementation of adequate safety measures. methods: measurements of noise and chemicals were performed, self-reported exposure and usage of personal protective equipment from workers were us...
maize genotypes were screened for host resistance and seed treatment chemicals were evaluated in field to manage fusarium ear rot complex of maize at high- and mid-hill environments in nepal during 2003 and 2004. seven popular maize genotypes along with a susceptible check were used in the host resistance study. the maize genotypes adopted from exotic sources, manakamana-3 and deuti, performed ...
Formaldehyde is a chemical used in many different industrial sectors and classified as carcinogen well causing allergic reactions. Due to the health effects of formaldehyde, which widely textile dyes auxiliary chemicals, its analysis this type matrices becomes important. In study, order meet these requirements, formaldehyde was converted oxime derivative by derivatization with o-(2,3,4,5,6-Pent...
Background: Precise determination of organic load is one of the major and important parameters in selecting appropriate treatment process for industrial and domestic wastewaters . Performing chemical oxygen demand (COD) test in real samples is always subject to interferences, insufficient sample digestion and consuming high levels of chemical pollutants. The main aim of this scientific and ap...
context studies on experimental animals have shown liver is a common target of chemical carcinogens; this might suggest that occupational exposure to chemicals is another risk factor for hcc. however, the relationship between occupation and liver cancer has not been extensively studied, with the exception of the known association between vinyl chloride and angiosarcoma of the liver. evidence ac...
The U.S. Congress has passed legislation requiring the EPA to implement screening tests for identifying endocrine-disrupting chemicals. A series of workshops was sponsored by the EPA, the Chemical Manufacturers Association, and the World Wildlife Fund; one workshop focused on screens for chemicals that alter thyroid hormone function and homeostasis. Participants at this meeting identified and e...
Chemicals that have the intrinsic property to modulate or even disrupt the endocrine system are present in the human environment. Because it is the potency of such chemicals that determines the toxicologic relevance, assessment of the risk to human health must consider both the endocrine disrupting potential and the potency. Usually in vitro assays are applied to detect the potential of a hormo...
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