Navigation Links
Pitt research suggests EPA pesticide exposure test too short, overlooks long term effects
Date:8/17/2009

t kill one the world's most susceptible species in four days, then the four-day test period may not adequately gauge the long-term effects on larger, less-sensitive species.

"When a pesticide's toxic effect takes more than four days to appear, it raises serious concerns about making regulatory decisions based on standard four-day tests for any organism," Relyea said. "For most pesticides, we assume that animals will die during the period of exposure, but we do not expect substantial death after the exposure has ended. Even if EPA regulations required testing on amphibians, our research demonstrates that the standard four-day toxicity test would have dramatically underestimated the lethal impact of endosulfan on even this notably sensitive species."

Andrew Blaustein, a professor in Oregon State University's nationally ranked Department of Zoology, who is familiar with the Pitt study, said the results raise concerns about standards for other chemicals and the delayed dangers that might be overlooked. Some of the frog eggs the Pitt team used had been collected by Blaustein's students for an earlier unrelated experiment, but he had no direct role in the current research.

"The results are somewhat alarming because standards for assessing the impacts of contaminants are usually based on short-term studies that may be insufficient in revealing the true impact," Blaustein said. "The implications of this study go beyond a single pesticide and its effect on amphibians. Many other animals and humans may indeed be affected similarly."

Tadpoles in the Pitt project spent four days in 0.5 liters of water containing endosulfan concentrations of 2, 6, 7, 35, 60, and 296 parts-per-billion (ppb), levels consistent with those found in nature. The team cites estimates from Australiawhere endosulfan is widely usedthat the pesticide can reach 700 ppb when sprayed as close as 10 meters from the ponds amphibians typically call home and 4 ppb when sprayed
'/>"/>

Contact: Morgan Kelly
mekelly@pitt.edu
412-624-4356
University of Pittsburgh
Source:Eurekalert

Page: 1 2 3 4

Related biology news :

1. Research shows skeleton to be endocrine organ
2. Newly created cancer stem cells could aid breast cancer research
3. Dominant cholesterol-metabolism ideas challenged by new research
4. Researchers identify proteins involved in new neurodegenerative syndrome
5. Texas researchers and educators head for Antarctica
6. MGH researchers describe new way to identify, evolve novel enzymes
7. University of Pennsylvania researchers develop formula to gauge risk of disease clusters
8. University of Oregon researcher finds that on waters surface, nitric acid is not so tough
9. U of MN researchers discover noninvasive diagnostic tool for brain diseases
10. U of Minnesota researchers discover noninvasive diagnostic tool for brain diseases
11. Story ideas from the Journal of Lipid Research
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:8/22/2014)... , August 22, 2014 ... ) has announced the addition of ... 2014-2018"  report to their offering.  ... ,Biometrics is a technology that helps ... on their physical or behavioral features. ...
(Date:8/22/2014)... RIVERSIDE, Calif. Thomson Reuters , a leading ... five researchers at the University of California, Riverside in ... brightest minds of our times." , To generate the ... (2002-2012) to identify researchers whose published work has had ... included among some 3,200 individuals who published the greatest ...
(Date:8/22/2014)... the 29th Annual International Papillomavirus Conference shows that ... combats three types of human papillomavirus, including the ... cancer. , When tested in several cultured human ... HPV-18 and HPV-11 cells, according to Louise T. ... the findings at the Seattle conference. The National ...
Breaking Biology News(10 mins):Biometrics Market in North America 2014-2018: Key Vendors are 3M Cogent, Cross Match, NEC and Safran SA 2Biometrics Market in North America 2014-2018: Key Vendors are 3M Cogent, Cross Match, NEC and Safran SA 35 UC Riverside scientists among world's most influential scientific minds 2
... Inc. (Nasdaq: AWRE ), a leading supplier of ... to discuss the company,s operating results for the fourth quarter ... 5:00 p.m. Eastern Time. CEO Michael Tzannes and CFO Rick ... webcast by Thomson and can be accessed on the Investor ...
... the potentially fatal hepatitis C virus has banked its ... inability to infect animals other than humans and chimpanzees ... animal model for the disease. But now, in a ... online issue of Nature , Rockefeller University scientists ...
... . , Lack of sleep is a ... the day poses a very real and dangerous problem. ... at McGill University demonstrates interestingly, that sleep-wake states are ... melanin-concentrating hormone (MCH) neurons and orexin (Orx) neurons, which ...
Cached Biology News:Aware Announces Q4 and FY2008 Earnings Conference Call 2Discovery could lead to a new animal model for hepatitis C 2What happens when we sleep 2
(Date:8/22/2014)... Dallas, Texas (PRWEB) August 23, 2014 ... on the current state of the Papain industry ... basic overview of the industry, including definitions, applications ... Chinese domestic market analysis are provided with a ... of the market. A comparison between the international ...
(Date:8/22/2014)... Today the Academy of Model Aeronautics (AMA) filed a ... for the D.C. Circuit challenging the FAA’s Interpretation of the ... on June 25, 2014. , The AMA believes that ... intent of the FAA Modernization and Reform Act of 2012, ... new rules or regulations regarding model aircraft that are operated ...
(Date:8/22/2014)... 2014 /PRNewswire/ - BIOREM Inc. (TSXV: BRM) ("Biorem" or "the Company") today ... 30, 2014.  Biorem,s complete 2014 second quarter financial statements and MD&A have ... June 30, , Six-months ended June 30, ( ... 2013 , 2014 , 2013 Revenue , ... 9,195 Gross profit , 56 , 1,485 ...
(Date:8/22/2014)... of Surrey have discovered how the receptors responsible for ... , The new study, published today in The ... in turn regulates the cycle of all cells in ... the local biological clock and its control are weakened ... in bladder physiology and ageing. , While ...
Breaking Biology Technology:Papain Industry Global & China Development Trend and Proposals Analysis Research Report Available at DeepResearchReports.com 2Papain Industry Global & China Development Trend and Proposals Analysis Research Report Available at DeepResearchReports.com 3AMA Files Petition for Review of FAA’s Interpretive Rule 2Biorem Reports 2014 Second Quarter Results 2Biorem Reports 2014 Second Quarter Results 3Treatment for overactive bladder and irritable bowel syndrome advanced through pioneering research 2
... Sept. 6, 2011 The Immune Deficiency Foundation (IDF) ... continuing education (CE) course for  nurses. The goal of ... nurses by providing an educational update on primary immunodeficiency ... is the national patient organization dedicated to improving the ...
... 6, 2011 Auxilium Pharmaceuticals, Inc. (NASDAQ: ... safety update following 17 months of post-approval use in ... Dupuytren,s contracture patients with a palpable cord.  After approximately ... U.S., there was no clinically meaningful change in the ...
... Genprex, Inc., formerly known as Convergen LifeSciences, Inc., announced today ... will be branded as Oncoprex™ .   ... oncology sector in recognition of our advancing development programs.  We ... to unlock the unrealized potential of a growing list of ...
Cached Biology Technology:Immune Deficiency Foundation Launches Free Accredited Course for Nurses About Primary Immunodeficiency and Immunoglobulin Therapy 2Immune Deficiency Foundation Launches Free Accredited Course for Nurses About Primary Immunodeficiency and Immunoglobulin Therapy 3Auxilium Pharmaceuticals, Inc. Announces 17 Month XIAFLEX® Safety Update 2Auxilium Pharmaceuticals, Inc. Announces 17 Month XIAFLEX® Safety Update 3Auxilium Pharmaceuticals, Inc. Announces 17 Month XIAFLEX® Safety Update 4Genprex Announces New Branding 2
... Designed specifically for high efficiency ... Low toxicity reagent proven to ... range of cell types. Results ... 95% of target gene expression. ...
... measurements in an easy-to-use benchtop package. ... spectrometer (ESI-oa-TOF) concentrates the performance of ... which fits on your bench. The ... 10,000 FWHM and mass accuracy of ...
... The lower cost and reduced ... system make reference standard DNA analysis ... be used with any of SEQUENOM's ... High-Performance Genotyping (iPLEXTM Gold) , Gene ...
... jetSI-ENDO-FluoR is a tetramethylrhodamine-conjugated jetSI-ENDO ... at 580 nm), the powerful ... are used to determine the ... intracellular delivery and trafficking of ...
Biology Products: