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:9/18/2014)... Miranda, a small, icy moon of Uranus, is one ... the solar system. Despite its relatively small size, Miranda ... that resulted in the formation of at least three ... coronae. , These coronae are visible in Miranda,s ... km across. Arden corona, the largest, has ridges and ...
(Date:9/18/2014)... McGill University and the Quebec government have discovered ... Canadian Journal of Fisheries and Aquatic Sciences . ... cleansers, or industrial cleansers, to which they are ... size and buoyancy, they may readily pass through ... contaminant in the world,s oceans, but have only ...
(Date:9/18/2014)... that prompts millions of Americans to undertake jaunts into the ... a little longer within a century, according to new research. ... areas of the United States as summer temperatures linger later ... Global Ecology and Biogeography . For instance, the paper ... tree of New Hampshire could change color one to ...
Breaking Biology News(10 mins):Miranda: An icy moon deformed by tidal heating 2Miranda: An icy moon deformed by tidal heating 3Miranda: An icy moon deformed by tidal heating 4Miranda: An icy moon deformed by tidal heating 5Miranda: An icy moon deformed by tidal heating 6Miranda: An icy moon deformed by tidal heating 7Microplastic pollution discovered in St. Lawrence River sediments 2Fall foliage season may be later, but longer on warmer Earth 2Fall foliage season may be later, but longer on warmer Earth 3Fall foliage season may be later, but longer on warmer Earth 4
... transmitted between two individuals in a population is crucial ... New research has laid the foundation for a ... allow for more targeted prevention strategies. By using ... Physical Review Letters , outlines a predictive model of ...
... British Columbia , Feb. 5, 2013 Xenon, ... rare diseases, today announced that it has received a ... marketing approval of Glybera®, a novel gene therapy treatment ... the first gene therapy approved in the Western world. ...
... of Alberta polar bear researcher along with eleven international ... Arctic ecosystem change to deal with a climate change ... Andrew Derocher co-authored a policy perspective in the journal ... populations to accept that just one unexpected jump in ...
Cached Biology News:Can you predict how a disease will spread in a population? 2Xenon Receives a Milestone Payment for Marketing Approval of Glybera in Europe 2Polar bear researchers urge governments to act now and save the species 2
(Date:9/19/2014)... Charlotte, NC (PRWEB) September 19, 2014 ... Certified Biobased Product Label for its Organic Cotton ... the product’s amount of renewable biobased ingredients meets or ... or intermediate materials composed in whole or in significant ... “This logo/label will allow our Organic cotton to be ...
(Date:9/18/2014)... Bipartisan passage this week by the U.S. ... development and commercialization of new technologies and promote growth ... SPIE, the international society for optics and photonics ... (RAMI) Act, now moves to the full Senate for ... optimistic that it will win passage there as well ...
(Date:9/18/2014)... KEEGO HARBOR, Mich. , Sept. 18, 2014  Health ... -based biotech firm investigating early-stage algae bioactive compounds and metabolic ... member to the company,s board of directors. Ms. Nola ... executive and investment advisor joined the board effective September 17, ... have Ms. Masterson agree to join our board," states ...
(Date:9/18/2014)... 2014 Research and Markets ... N-acetylcysteine Industry Report 2014" report to their ... Report 2014 is a professional and in-depth study ... industry. The report provides a basic ... and industry chain structure. The N-acetylcysteine market analysis ...
Breaking Biology Technology:Barnhardt Manufacturing Company Earns USDA Certified Biobased Product Certification and Label for Organic Cotton 2House passage of high-tech manufacturing bill is move toward stronger economy, say SPIE leaders 2House passage of high-tech manufacturing bill is move toward stronger economy, say SPIE leaders 3Health Enhancement Announces New Board Member In Advance Of Annual Shareholder Meeting 2Global N-acetylcysteine Industry Report 2014 2
... Communications MILWAUKEE When the topic of economic crisis comes ... Wisconsin. With institutions such as the University of Wisconsin-Milwaukee ... out talented graduates every year and a long history as ... stable environment that would attract big business. , ,However, ...
... to have a good grasp on their tangible property. ... value of their products. On the other hand, they ... Companies may understand that inventions could generally have some ... is possible to obtain patents on those inventions. However, ...
... NameProtect Inc. has announced the availability of its ... data to trademark professionals from a wide range of ... is meant to achieve efficient and competitive trademark clearance ... , ,Users will be able to integrate references ...
Cached Biology Technology:A cry for unity for the economy of southeast Wisconsin 2A cry for unity for the economy of southeast Wisconsin 3A cry for unity for the economy of southeast Wisconsin 4Save money through smart patenting 2Save money through smart patenting 3Save money through smart patenting 4NameProtect announces Web-enhanced trademark software 2
...
Agarose for baculovirus plaque assays which allow optimal growth of plated insect cells....
BD BaculoGold Max-XP Insect Cell Medium 1 Liter...
Mycoplasma and virus tested...
Biology Products: