Navigation Links
Study finds steroids may persist longer in the environment than expected
Date:9/26/2013

ucts that we know are present in trace amounts in our water supply. We should use what we're learning about trenbolone to more closely scrutinize the fate and better mitigate the impact of these products in the environment."

The team found similar results for dienogest, a hormone used in a birth-control pill called Natazia, and dienedone, a banned anabolic steroid that has been marketed as a body-building supplement.

Trenbolone acetate is implanted in the ears of more than 20 million cattle in the United States, according to studies cited by the researchers in their paper.

The drug is metabolized and then excreted by livestock, and makes its way into waterways mainly through runoff.

The steroid has been considered safe due to its rapid degradation, with studies pointing to an environmental half-life of less than a day. But there has been concern that it and other synthetic drugs, when found in concentrated amounts, can be harmful to aquatic species and the environment generally. Studies have pointed to steroids and other drugs' effects on fish, through fewer eggs produced by females to skewing the sex of some species.

"We rarely see fish kills anymore, and we probably aren't discharging many carcinogens into surface waters anymore. But I don't believe this necessarily means that our water is safe for aquatic organisms," says Edward Kolodziej, associate professor in engineering at the University of Nevada-Reno and the other corresponding author on the Science paper. "It just might be harder to characterize the adverse effects associated with contaminant exposures these days."

Sunlight is one catalyst for breaking down compounds in the environment. But in this study, by simulating day and night in the lab, the research team found that the steroid's chemical compounds never fully disappeared in daylight. Moreover, during a simulated night, under typical surface water conditions, some of the compounds regenerated
'/>"/>

Contact: Richard Lewis
richard-c-lewis@uiowa.edu
319-384-0012
University of Iowa
Source:Eurekalert

Page: 1 2 3

Related biology news :

1. Study by UC Santa Barbara researchers suggests that bacteria communicate by touch
2. Law that regulates shark fishery is too liberal: UBC study
3. New study will help protect vulnerable birds from impacts of climate change
4. Study jointly led by UCSB researcher supports theory of extraterrestrial impact
5. BYU study: Using a gun in bear encounters doesnt make you safer
6. 15-year study: When it comes to creating wetlands, Mother Nature is in charge
7. Pycnogenol (French maritime pine bark extract) shown to improve menopause symptoms in new study
8. Crystal structure of archael chromatin clarified in new study
9. EU-funded study underlines importance of Congo Basin for global climate and biodiversity
10. University of Houston study shows BP oil spill hurt marshes, but recovery possible
11. Study demonstrates cells can acquire new functions through transcriptional regulatory network
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:12/3/2014)... Dec. 2, 2014   Marvin Test Solutions ... test solutions for military, aerospace, and manufacturing organizations, ... its successful TS-900 PXI semiconductor test platform ... of high-end systems to customers at a fraction ... to traditional ATE. "Our semiconductor ...
(Date:11/21/2014)... Wash. , Nov. 20, 2014 C-Labs ... for the Internet of Things (IoT), today announced the ... of chief operating officer. Previously a strategic advisor to ... finance, and operations. Mr. Traynor is based out of ... . He reports to Chris Muench , Chief ...
(Date:11/18/2014)... , Nov. 18, 2014   EyeLock ... authentication solutions, and MorphoTrust USA (Safran), ... services, today announced a strategic partnership to offer ... motor vehicle administration (MVA), airport screening and financial ... identity-related solutions, MorphoTrust serves consumers through a nationwide ...
Breaking Biology News(10 mins):Marvin Test Solutions Brings New Capabilities to PXI-Based Semiconductor Test with TS-960 2Marvin Test Solutions Brings New Capabilities to PXI-Based Semiconductor Test with TS-960 3C-Labs Names Former Microsoft and Bsquare Executive as Chief Operating Officer 2EyeLock, MorphoTrust Form Strategic Partnership to Pursue Commercial Enterprise Deployments 2EyeLock, MorphoTrust Form Strategic Partnership to Pursue Commercial Enterprise Deployments 3
... A molecule that helps the body's motor nerve cells ... a major role in inhibiting spinal-cord neurons from regenerating ... found. In cultured cells, the researchers found that a ... stabilizes long nerve fibers in adult vertebrates ?chemically blocks ...
... researchers first to report function of tunneling nanotubules , ... an extensive network of tiny tunnels that, like a ... signals to distant cells. This surprising discovery, being reported ... in the September issue of the journal Immunity, may ...
... seeking ways to eliminate pollution from waterways with microbes ... freshwater ponds can generate electricity. They present their findings ... Society for Microbiology. , "The bacteria are capable of ... to operate small electronic devices. As long as the ...
Cached Biology News:Researchers find molecule that inhibits regrowth of spinal nerve cells 2Researchers find molecule that inhibits regrowth of spinal nerve cells 3'Underground' tunnels discovered as means for communication between immune system cells 2'Underground' tunnels discovered as means for communication between immune system cells 3'Underground' tunnels discovered as means for communication between immune system cells 4Pollution-eating bacteria produce electricity 2
(Date:12/19/2014)... LayerBio is an MIT spin-off developing novel ... National Eye Institute (NEI) at the National Institutes of ... grant to develop a drug-eluting intraocular lens (IOL) for ... of vision loss in people over age 40 and ... Ken Mandell, LayerBio’s Founder and CEO, "There is a ...
(Date:12/19/2014)... In contrast to traditional LED lights where the ... uses proprietary LED technology to incorporate their spectra in ... is critical in low proximity installations. The Valoya L-series ... lifetime which is up to four times longer than ... cost was clearly higher when compared to traditional fluorescent ...
(Date:12/19/2014)... Egenix, Inc. is pleased to announce that Lionel Goldfrank ... succeed Donald Fresne ; Mr. Fresne has also resigned ... of the Board.  In recognition of the many contributions and ... twenty years, the Board designated Mr. Fresne as Chairman Emeritus. ... Search Committee to find a suitable replacement with Biotech industry ...
(Date:12/17/2014)... Based on the revenues gained ... market is dominated by four major players contributing ... These players include GE Healthcare (U.K.), Siemens AG ... , Full Report Copy at http://www.marketsandmarkets.com/Market-Reports/surgical-imaging-market-210534462.html ... be attributed to its strong product portfolio, which ...
Breaking Biology Technology:LayerBio Awarded NIH Grant to Develop a Drug Delivery Device for Cataract Surgery 2Global Refurbished Surgical Imaging Market by Product & Application is Estimated to Reach $1.25 Billion by 2019 - New Research Report by MarketsandMarkets 2Global Refurbished Surgical Imaging Market by Product & Application is Estimated to Reach $1.25 Billion by 2019 - New Research Report by MarketsandMarkets 3Global Refurbished Surgical Imaging Market by Product & Application is Estimated to Reach $1.25 Billion by 2019 - New Research Report by MarketsandMarkets 4
... (Nasdaq: VRUS ), a clinical stage pharmaceutical ... to treat viral infections, reported financial results and operational ... Financial Results Revenues were $1.9 million during the ... for the quarter ended March 31, 2008 and reflect ...
... Iceland, May 11 deCODE genetics,(Nasdaq: DCGN ) ... March 31, 2009. A conference call to discuss these ... webcast live tomorrow,Tuesday, May 12, at 8:00am Eastern Daylight ... Net loss for the quarter ended ...
... MOUNTAIN VIEW, Calif., May 11 VIVUS, Inc. (Nasdaq: ... and commercialization of novel therapeutic products, today reported its highlights and ... First Quarter 2009 Highlights: , ... European Patent for Qnexa - In January 2009, we announced ...
Cached Biology Technology:Pharmasset Reports Fiscal Second Quarter 2009 Financial Results 2Pharmasset Reports Fiscal Second Quarter 2009 Financial Results 3Pharmasset Reports Fiscal Second Quarter 2009 Financial Results 4Pharmasset Reports Fiscal Second Quarter 2009 Financial Results 5Pharmasset Reports Fiscal Second Quarter 2009 Financial Results 6Pharmasset Reports Fiscal Second Quarter 2009 Financial Results 7Pharmasset Reports Fiscal Second Quarter 2009 Financial Results 8deCODE genetics Announces First Quarter 2009 Financial Results 2deCODE genetics Announces First Quarter 2009 Financial Results 3deCODE genetics Announces First Quarter 2009 Financial Results 4deCODE genetics Announces First Quarter 2009 Financial Results 5deCODE genetics Announces First Quarter 2009 Financial Results 6deCODE genetics Announces First Quarter 2009 Financial Results 7deCODE genetics Announces First Quarter 2009 Financial Results 8VIVUS Reports First Quarter 2009 Financial Results and Highlights 2VIVUS Reports First Quarter 2009 Financial Results and Highlights 3VIVUS Reports First Quarter 2009 Financial Results and Highlights 4VIVUS Reports First Quarter 2009 Financial Results and Highlights 5VIVUS Reports First Quarter 2009 Financial Results and Highlights 6VIVUS Reports First Quarter 2009 Financial Results and Highlights 7
... siRNA library screening, optimal siRNA ... and verified for each cell ... siRNA Transfection Optimization Kit, which ... transfection conditions in 96 well ...
... Series of positioning slides offers multiple ... leadscrew, micrometer, and manual. With this ... cost-effective multi-axis systems. These slides also ... resolutions down to 10 nanometers, integrated ...
Ethylene glycol-bis(2-aminoethyl ether)-N,N,N',N'-tetraacetic acid, Molecular Biology Grade...
Kit Components: Anti-PARP LumiGLO Chemiluminescent Substrate Immunoblot Blocking Reagent Pyronin Y Reagent Goat Anti-Rabbit IgG, HRP conjugate Double-It Reagent Film Exposure Folders Autor...
Biology Products: