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

Assessing the risk posed to aquatic organisms by the discharge of certain steroids and pharmaceutical products into waterways is often based on a belief that as the compounds degrade, the ecological risks naturally decline.

But there's growing sentiment that once in the environment, some of these bioactive organic compounds may transform in a way that makes their presumed impact less certain.

A new study led by the University of Iowa and published online Thursday in the journal Science found this was the case with the anabolic steroid trenbolone acetate and two other drugs.

Once popular in the bodybuilding and weightlifting communities,trenbolone acetate is now banned for human use. However, it is federally approved for use by the beef industry to promote weight gain and increase feeding efficiency in cattle.

In lab tests followed by field experiments, the researchers found that trenbolone does not fully break down in water as believed, retaining enough of a chemical residue to regenerate itself in the environment under certain conditions, to an extent that the drugs' lives may be prolonged, even in trace amounts.

Researchers says the study is a first step toward better understanding the environmental role and impact of steroids and pharmaceutical products, all of which have been approved by the federal government for various uses and that have been shown to improve food availability, environmental sustainability and human health.

"We're finding a chemical that is broadly utilized, to behave in a way that is different from all our existing regulatory and risk-assessment paradigms," says David Cwiertny, assistant professor in engineering at the University of Iowa and a co-corresponding author on the paper."What our work hopefully will do is help us better understand and assess the environmental fate of emerging contaminant classes. There are a variety of bioactive pharmaceuticals and personal-care prod
'/>"/>

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:10/15/2014)... in female mice to an enzyme activated by the ... resistant to respiratory infections than males. Now, an international ... bacterial pneumonia in female mice is linked to the ... that this enzyme is ultimately activated by the release ... lead by Professor Lester Kobzik at the Harvard University ...
(Date:10/14/2014)... prostate cancer tumors scavenge and hoard copper that is ... may be a fatal weakness. , Researchers at ... cancer cells by delivering a trove of copper along ... brimming with the mineral, leaving non-cancer cells healthy. , ... available for other uses, could soon be tested in ...
(Date:10/14/2014)... questions is how to produce enough food to feed ... and Agriculture Organization of the United Nations predicts that ... years to feed a growing global population, and plants ... food production. Plants—grains, cereals, fruits, vegetables, and more—feed ... research must tap into our knowledge of how plants ...
Breaking Biology News(10 mins):Prostate cancer's penchant for copper may be a fatal flaw 2Building a bridge from basic botany to applied agriculture 2Building a bridge from basic botany to applied agriculture 3
... Not knowing which way is up can have deadly ... spatial disorientation, is responsible for up to 10 percent ... 90 percent of these being fatal, according to the ... no spatial disorientation accidents in space, it is a ...
... feel the tell-tale tug of tiny concentrations of pathogens ... sterilizedor even heldas they are ephemeral and weightless. The ... a patented "optical tweezers" technique for detecting and measuring ... virus on a surface. NIST has issued a non-exclusive ...
... from satellites now allow scientists to monitor changes to water ... sheets and even under the ground. As the climate changes, ... predicting future impacts in different regions. Sea level rise ... it is much more difficult to model and predict than ...
Cached Biology News:Space researchers developing tool to help disoriented pilots 2Space researchers developing tool to help disoriented pilots 3Measuring water from space 2Measuring water from space 3
(Date:10/20/2014)... OncLive® is pleased to ... Thomas Jefferson University has joined its Strategic Alliance ... Partnership program, the Sidney Kimmel Cancer Center at ... of the Center’s cutting-edge research programs, comprehensive approach ... other health care professionals from the Sidney Kimmel ...
(Date:10/19/2014)... OCTOBER 20-22, 2014: The 9th Annual ... take place at the Congress Center Basel, ... now available at http://www.abim.ch . ... from all over the globe will exchange ... products and developments on the world market. ...
(Date:10/19/2014)... The Asia-Pacific Speech Analytics market report defines and segments ... forecast of revenue. This market is estimated to grow ... 2019, at a Compound Annual Growth Rate (CAGR) of ... TOC of the Asia-Pacific Speech Analytics market report to ... also provides a glimpse of the segmentation in the ...
(Date:10/19/2014)... According to market research report “Outdoor Wi-Fi Market ... Global Advancements, Forecasts and Analysis (2013 - 2018)", ... with analysis and forecasting of the global revenues. ... and the restrains for this market with the ... Browse 65 market data tables and 69 figures ...
Breaking Biology Technology:Sidney Kimmel Cancer Center at Thomas Jefferson University Partners With OncLive 2Sidney Kimmel Cancer Center at Thomas Jefferson University Partners With OncLive 3The Asia-Pacific Speech Analytics market is estimated to reach $208 million by 2019 - New Report by MicroMarket Monitor 2The Asia-Pacific Speech Analytics market is estimated to reach $208 million by 2019 - New Report by MicroMarket Monitor 3The Asia-Pacific Speech Analytics market is estimated to reach $208 million by 2019 - New Report by MicroMarket Monitor 4Outdoor Wi-Fi Market (by Access Points, WLAN Controllers, Wireless gateways) Expected to Cross $37.2 Billion by 2018 - New Report by MarketsandMarkets 2Outdoor Wi-Fi Market (by Access Points, WLAN Controllers, Wireless gateways) Expected to Cross $37.2 Billion by 2018 - New Report by MarketsandMarkets 3Outdoor Wi-Fi Market (by Access Points, WLAN Controllers, Wireless gateways) Expected to Cross $37.2 Billion by 2018 - New Report by MarketsandMarkets 4
... Calif., March 26 /Xinhua-PRNewswire-FirstCall/,-- Kiwa Bio-Tech Products Group ... the year ended December 31, 2007 were,$9,129,779 an ... Net sales from continuing operations were $9,129,779 and ... and 2006, respectively,representing an increase of $6,623,064 or ...
... Financial Community ... March 26 Environmental Power,Corporation (Nasdaq: EPG ), ... it has completed its move to its new corporate,headquarters ... in Portsmouth, New Hampshire, positions Environmental Power to,execute on ...
... Zentaris Inc.,(NASDAQ: AEZS ; TSX: AEZ), a ... today reported dosing has commenced with,its flagship product ... antagonist, in the second efficacy study,of its Phase ... enlargement of the prostate., "We are very ...
Cached Biology Technology:Kiwa Bio-Tech Year-End Revenues Increase 264% - Exceed $9.1 Million 2Kiwa Bio-Tech Year-End Revenues Increase 264% - Exceed $9.1 Million 3Kiwa Bio-Tech Year-End Revenues Increase 264% - Exceed $9.1 Million 4Kiwa Bio-Tech Year-End Revenues Increase 264% - Exceed $9.1 Million 5Kiwa Bio-Tech Year-End Revenues Increase 264% - Exceed $9.1 Million 6Kiwa Bio-Tech Year-End Revenues Increase 264% - Exceed $9.1 Million 7Environmental Power Announces Opening of New Corporate Headquarters in Tarrytown, NY 2Environmental Power Announces Opening of New Corporate Headquarters in Tarrytown, NY 3Environmental Power Announces Opening of New Corporate Headquarters in Tarrytown, NY 4Aeterna Zentaris Begins Second Phase 3 Trial of Cetrorelix for Benign Prostatic Hyperplasia 2Aeterna Zentaris Begins Second Phase 3 Trial of Cetrorelix for Benign Prostatic Hyperplasia 3Aeterna Zentaris Begins Second Phase 3 Trial of Cetrorelix for Benign Prostatic Hyperplasia 4
... is described by end-users to be "a ... fundamentals of light microscopy and electronic imaging. ... it does not require much space and ... lab environment. The DM-BA300 combines Motic's own ...
... BAS-5000 is the highest resolution standard ... top member of Fujifilm's family of ... Imaging Plate (IP) and changeable resolutions ... Fujifilm BAS-5000 does it without compromising ...
This bispecific antibody complex has been tested for efficient depletion of CD41+ cells using the StemSep ; negative immunomagnetic cell separation system....
... solutions to meet your laboratory's requirements for data management and quality control. ... ... ... CLARA® is the standard software for Staccato Systems and custom Allegro Modules allowing for the simple ...
Biology Products: