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:9/30/2014)... Munich report that a new class of chemical ... drugs. They have also pinpointed the relevant target ... agents. , Researchers led by LMU,s Professor ... Technische Universitt Mnchen have identified a class of ... the fight against malignant tumors. The compound is ...
(Date:9/30/2014)... Sept. 30, 2014  Spectra Automation, a ... the biotech and power generation industries, announced ... Bioprocess Manager, an easy-to-use and cost-effective data ... bioprocess development laboratories. Most ... and analyzer systems. Accessing and consolidating data ...
(Date:9/29/2014)... A species of gut bacteria called Clostridium ramosum , ... weight. The work is published this week in mBio ... Microbiology. , A research team from the German Institute ... human gut bacteria including C. ramosum gained weight ... C. ramosum were less obese even when consuming ...
Breaking Biology News(10 mins):Cancer therapy: Driving cancer cells to suicide 2Spectra Automation Introduces RECONN Bioprocess Manager 2Gut bacteria promote obesity in mice 2
... WASHINGTON, DC February 5, 2013 What do microbes have ... is yeast a microbe and every step in the ... freely-available report; FAQ: If the Yeast Ain,t Happy, Ain,t Nobody Happy: ... beer. "Every time someone brews a batch of beer, in ...
... with sexually transmitted infections aren,t getting the treatment they ... new Michigan State University study that highlights a wholly ... current medical guidelines. About half of the 735 ... at three hospitals in Grand Rapids, Mich. from 2008 ...
... The Federation of American Societies for Experimental Biology (FASEB) ... advocacy competition, Stand Up for Science. The competition solicited ... health, quality of life, or economy of local communities ... by ,Stand With Science, a group of graduate students ...
Cached Biology News:Yeast we can! New report answers questions on microbiology and beer 2Few pregnant women treated for sexually transmitted infections 2
(Date:9/30/2014)... Basel, Switzerland (PRWEB) September 30, 2014 ... advanced software solutions for drug discovery and ... the FUNGITECT consortium has chosen Genedata Selector ... next-generation sequencing (NGS) data. FUNGITECT is a ... of invasive fungal diseases via individualized anti-fungal ...
(Date:9/30/2014)... Md., Sept. 30, 2014 BioHealth Innovation, ... commercializing market-relevant biohealth innovations and increasing access to early-stage ... today that venture capitalist, Tania Fernandez , Ph.D., ... Dr. Fernandez will be a member of the management ... provide up to $50 million in seed and early-stage ...
(Date:9/30/2014)... Sept. 30, 2014 The overall research ... (NGS) sequencing trends and use. Most researchers outsource ... expected to increase within the next 12 months. ... criteria for purchasing sequencing instruments. Disease-related research is ... of RNA-Seq continues to surge, with half of ...
(Date:9/30/2014)... MA (PRWEB) September 30, 2014 ... (UC) and collaboration company is dedicated to supporting ... connectivity needs. Julie Power, a carrier ... to ensure collaboration solutions stays connected and productive ... to the increased movement of businesses to cloud ...
Breaking Biology Technology:FUNGITECT Consortium Adopts Genedata Selector as Data Analysis Platform for Anti-fungal R 2FUNGITECT Consortium Adopts Genedata Selector as Data Analysis Platform for Anti-fungal R 3Seasoned Life Sciences Venture Capitalist Tania Fernandez Joins BHI to Help Manage New BioHealth Gap Fund 2Global Next-generation Sequencing Trends 2SoundConnect Expands Carrier Services Division 2
... , , SAN CARLOS, Calif., Sept. 21 ... hosting a conference call to discuss today,s announcement of a new partnership for ... (ET)/5:30 a.m. Pacific Time (PT). , , The live audio-only ... posted on the home page of Nektar,s website: http://www.nektar.com . ...
... ... solution to inventory Ultra-low Freezer and Liquid Nitrogen Tank samples and efficiently manage data ... ... Inc. today announced the release of FreezerPro 2010, Frozen sample inventory and information management ...
... the business of developing high-speed electronic components, it pays ... track of them you will need to use dedicated ... UltraFast Innovations GmbH. The new company, which has just ... and the Max Planck Society (MPG), manufactures specialized mirrors ...
Cached Biology Technology:Nektar Therapeutics to Host Conference Call to Discuss Today's Announcement of a New Partnership for NKTR-118 and NKTR-119 2RURO Inc. Today Announced the Release of FreezerPro 2010, Frozen Sample Inventory and Information Management System 2Optics made to measure 2Optics made to measure 3
... PAL label printer is portable, easy-to-use and makes ... Portable/Handheld Easy to use ... vial and slide sizes Time/Date stamp ... needs one Serialization feature makes you ...
... SPA Screening Assay, 5 x ... eliminate lengthy sample extraction procedures and ... 1.32-84.28 ng/ml (4-256 pmol/ml).Sensitivity: 0.65 ng/ml ... C. Category: Drug Screening & Cellular ...
The E. coli Expression System with Gateway Technology is designed to create E. coli expression clones containing the T7 promoter. The expression clones are ready for transformation and expression in ...
... C-1-tetrahydrofolate synthase, cytoplasmic ... Methylenetetrahydrofolate dehydrogenase (EC ... (EC 3.5.4.9); Formyltetrahydrofolate ... [Source:Uniprot/SWISSPROT;Acc:P11586] ...
Biology Products: