نتایج جستجو برای: مدل dde
تعداد نتایج: 121528 فیلتر نتایج به سال:
Stejskal and Tanner's ingenious pulsed field gradient design from 1965 has made diffusion NMR and MRI the mainstay of most studies seeking to resolve microstructural information in porous systems in general and biological systems in particular. Methods extending beyond Stejskal and Tanner's design, such as double diffusion encoding (DDE) NMR and MRI, may provide novel quantifiable metrics that ...
A large-scale survey on the area and depth stratified distribution of dichlorodiphenyltrichloroethane (DDT; mainly p,p'- and o,p'-dichlorodiphenyldichloroethylene (DDE)) contamination in the water column of the Southern California Bight (SCB) was conducted in 2003-2004 using a solid-phase microextraction-based sampling technique. Dissolved-phase DDEs were clearly widespread, with the central SC...
In-utero exposure to endocrine-disrupting compounds, including dichlorodiphenyltrichloroethane (DDT) and its metabolite dichlorodiphenylethylene (DDE), has been hypothesized to increase the risk of obesity later in life. We examined the associations of maternal serum concentrations of DDT and DDE during pregnancy with body mass index, obesity, waist circumference, and percentage of body fat in ...
AIM The present study was undertaken to estimate the current status of residues of organochlorine pesticides (OCPs), organophosphates (OPs) and synthetic pyrethroids (SPs) pesticides in human blood. MATERIALS AND METHODS Human blood samples were analyzed by gas chromatography and confirmed by gas chromatography-mass spectrometry in selective ion monitoring mode. RESULTS The gas chromatograp...
Lindhe, Ö. 2001. Adrenal Bioactivation and Toxicity of 3-MeSO2-DDE, o,p ́-DDD and DMBA Investigated in Tissue Slice Culture. Acta Universitatis Upsaliensis. Comprehensive Summaries of Uppsala Dissertations from the Faculty of Science and Technology 675. 49 pp. Uppsala. ISBN 91-554-5185-3. I developed a precision-cut adrenal slice culture procedure to investigate cytochrome P450 (CYP) catalysed i...
Although concentrations of organochlorine compounds (OCs) in birds from most of the United States and Canada have decreased over the last 30 years, there is still concern that migrant birds might be exposed to elevated concentrations of OCs during migration in Latin America. The Lerma-Chapala Basin in west-central Mexico is an important migration corridor and wintering area for many species. Th...
BACKGROUND Premature labor is a poorly understood condition. Estrogen is thought to play a key role and therefore the labor process may be affected by endocrine disruptors. We sought to determine whether or not an environmental toxicant, DDE, or dietary derived endocrine disruptors, daidzein and genistein, are associated with spontaneous preterm labor. METHODS Cases were defined as primiparou...
Temporal and spatial trends in contaminant concentrations were assessed in Lake Erie watersnakes, a threatened (USA)/endangered (Canada) species restricted to western Lake Erie. Temporal changes in plasma contaminant levels were determined in 1990 and 2003, and spatial patterns in 2003 at 12 sites, throughout the species' range. During this period, the watersnakes' diet changed from fish (75%) ...
The carcinogenic potential of environmental xenoestrogens (i.e., organochlorines) is a matter of controversy. Their pathogenic role as promoters in breast cancer has been previously suggested. In Europe, despite their prohibition since the '70s, residues persist in soil and rivers resulting in a widespread contamination of the general population. In this study, we have compared the serum levels...
آلاینده های گوناگونی به تالاب شاد گان که یکی از بزرگترین تالاب های کشور است وارد می شوند. یکی ازاین آلاینده ها ، باقیمانده آفت کش های آلی کلره از جمله د. د. ت و متابولیت های آن است که در گذشته برای کنترل آفات مورد استفاده قرا رمی گرفته است. د.د.ت و متابولیت های آن (p,p/-ddd ,o,p/-dde ,p,p/-dde ,o,p/-ddt ,p,p/-ddt در 5 گونه مختلف از ماهیان خوراکی تالاب شادگان و تاثیر وزن ، سن و نوع رژیم غذایی بر...
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