نتایج جستجو برای: assessment contamination

تعداد نتایج: 609156  

Journal: :Magnetic resonance in medicine 2002
Melissa Terpstra Kamil Ugurbil Rolf Gruetter

Spectral editing of the GABA spin system is hampered by coediting of macromolecule (MM) coherences. To reduce contamination arising from MMs in spectra edited for GABA, the highest field strength currently available for human experimentation (7 Tesla) and MEGA-based editing were used. Despite judicious choice of experimental parameters, MM contamination was found to arise from field drifts. Whe...

2014
Jocelyn M. Widmer Thomas A. Weppelmann Meer T. Alam B. David Morrissey Edsel Redden Mohammed H. Rashid Ulrica Diamond Afsar Ali Madsen Beau De Rochars Jason K. Blackburn Judith A. Johnson J. Glenn Morris

We inventoried non-surface water sources in the Leogane and Gressier region of Haiti (approximately 270 km(2)) in 2012 and 2013 and screened water from 345 sites for fecal coliforms and Vibrio cholerae. An international organization/non-governmental organization responsible for construction could be identified for only 56% of water points evaluated. Sixteen percent of water points were non-func...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تربیت مدرس 1389

abstract: country’s fiber optic network, as one of the most important communication infrastructures, is of high importance; therefore, ensuring security of the network and its data is essential. no remarkable research has been done on assessing security of the country’s fiber optic network. besides, according to an official statistics released by ertebatat zirsakht company, unwanted disconnec...

Journal: :Water research 2012
Kyung Hwa Cho Yakov A Pachepsky Joon Ha Kim Jung-Woo Kim Mi-Hyun Park

This study assessed fecal coliform contamination in the Wachusett Reservoir Watershed in Massachusetts, USA using Soil and Water Assessment Tool (SWAT) because bacteria are one of the major water quality parameters of concern. The bacteria subroutine in SWAT, considering in-stream bacteria die-off only, was modified in this study to include solar radiation-associated die-off and the contributio...

Journal: :Environmental Health Perspectives 1991
J C Kleinjans H J Albering A Marx J M van Maanen B van Agen F ten Hoor G M Swaen P L Mertens

Nitrate contamination of drinking water implies a genotoxic risk to man due to the endogenous formation of carcinogenic N-nitroso compounds from nitrate-derived nitrite. Thus far, epidemiological studies have presented conflicting results on the relation of drinking water nitrate levels with gastric cancer incidence. This uncertainty becomes of relevance in view of the steadily increasing nitra...

Journal: :Environmental pollution 2002
Ruchaya Boonyatumanond Areerat Jaksakul Pornthip Puncharoen Monthip Sriratana Tabucanon

The utilization of organochlorine pesticides for pest control chemical has been of great interest on residue contamination from biological organisms in the environment. Green mussel (Perna viridis) samples were monitored as bioindicators for assessment of the water quality in coastal waters along the Gulf of Thailand. Thirty-six samples were collected from 12 stations during 1997-1999 and analy...

2011
Michael D. Biderman Nhung T. Nguyen Christopher J. L. Cunningham

Including a method factor on which all items loaded significantly improved fit of CFAs of both IPIP and NEO-FFI data. Fit was further improved by separating the method factor into two factors representing construct-positive and construct-negative items. The criterion-related validity of conscientiousness increased when uncontaminated by method bias. PRESS PARAGRAPH This research extends previou...

Journal: :Clinical infectious diseases : an official publication of the Infectious Diseases Society of America 2015
Loren G Miller Samantha J Eells Michael Z David Nancy Ortiz Alexis R Taylor Neha Kumar Denise Cruz Susan Boyle-Vavra Robert S Daum

BACKGROUND Many patients suffer from recurrent Staphylococcus aureus infections, but there are few data examining recurrence predictors. METHODS We followed adults and children after treatment for S. aureus skin infections and their household contacts in Los Angeles and Chicago. We surveyed subjects for S. aureus body colonization, household fomite contamination, and behavioral and clinical f...

Journal: :The Science of the total environment 2002
Steven J Hamilton Kathleen M Holley Kevin J Buhl

A hazard assessment was conducted based on information derived from two reproduction studies conducted with endangered razorback suckers (Xyrauchen texanus) at three sites near Grand Junction, CO, USA. Selenium contamination of the upper and lower Colorado River basin has been documented in water, sediment, and biota in studies by US Department of the Interior agencies and academia. Concern has...

Ahmadabadi, Morteza , Kamani, Hossein , Paseban, Ali ,

Introduction: Due to the continued urbanization and industrialization in most parts of the world, metals are constantly being introduced into the soil environment and posing a major threat to human health. The purpose of this study was to investigate the contamination of Esfarayen surface soils with heavy metals and its hazards to human health. Methods: Surface soil samples were collected from ...

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