Navigation Links
Mercury in Bay Area fish a legacy of California mining
Date:1/25/2011

a et Cosmochimica Acta and the other published online Jan. 21 in Environmental Science & Technology.

Mercury is a naturally occurring element, but some 2,000 tons of it enter the global environment each year from human-generated sources. Deposited onto land or into water, mercury is picked up by some types of microorganisms, which convert a small portion of it to methylmercury, a highly toxic form that builds up in fish and the animals---and people---that eat them.

The primary way people in the United States are exposed to methylmercury is by eating fish and shellfish. Health effects include damage to the central nervous system, heart and immune system. The developing brains of young and unborn children are especially vulnerable.

In San Francisco Bay, Gehrke, Blum and coworkers suspected small fish such as silverside and topsmelt were acquiring mercury from sediments on the bay floor and then passing it along to larger fish and other fish-eating animals, but it also was possible that mercury from the atmosphere or localized industrial sources was ending up in the fish.

To resolve the question, the research team compared chemical "fingerprints" of mercury in sediments and in fish, much as a detective compares a suspect's fingerprints to those found at a crime scene. The fingerprints result from a natural phenomenon called isotopic fractionation, in which different isotopes of mercury react to form new compounds at slightly different rates. In one type of isotopic fractionation, mass-dependent fractionation (MDF), the different rates depend on the masses of the isotopes. In mass-independent fractionation (MIF), the behavior of the isotopes depends not on their absolute masses but on whether their masses are odd or even.

The team sampled sediment at 20 sites in the bay and fish at 26 sites. "We used young fish, less than four months old, that have a very small home habitat," said Gehrke. "Because they're restricted t
'/>"/>

Contact: Nancy Ross-Flanigan
rossflan@umich.edu
734-647-1853
University of Michigan
Source:Eurekalert

Page: 1 2 3

Related biology news :

1. Eggs show arctic mercury cycling may be linked to ice cover
2. Natural dissolved organic matter plays dual role in cycling of mercury
3. Succimer found ineffective for removing mercury
4. Study: Fish near coal-fired power plants have lower levels of mercury
5. Why mercury is more dangerous in oceans
6. Mercury levels are increasing in popular species of game fish in Lake Erie
7. Mercury is higher in some tuna species, according to DNA barcoding
8. Fingerprinting method reveals fate of mercury in Arctic snow
9. Study reveals how Arctic food webs affect mercury in polar bears
10. EPA fellow studies effect of mercury in toads
11. UT Knoxville and ORNL researchers reveal key to how bacteria clear mercury pollution
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:9/21/2014)... newborn immune T cells may have the ability to ... new study led by King,s College London. Although their ... babies may still be able to mount a strong ... Nature Medicine . , Our immune system is ... including neutrophils which play an important role in the ...
(Date:9/19/2014)... unveiled today by researchers from several Harvard University ... both experienced and aspiring researchers with the intellectual ... robots made from soft, flexible materials. , With ... and other advances in manufacturing technology, soft robotics ... principles drawn from conventional rigid robot design, but ...
(Date:9/19/2014)... species which over thousands of years has adapted to the ... that makes the cold dangerous for you. , This is ... and the cold provoking substance, called nonylphenol, comes from the ... suspected of being a endocrine disruptor, but when entering the ... ability to protect the cells in its body from cold ...
Breaking Biology News(10 mins):Immune system of newborn babies is stronger than previously thought 2Soft robotics 'toolkit' features everything a robot-maker needs 2Environmental pollutants make worms susceptible to cold 2Environmental pollutants make worms susceptible to cold 3
... to act cancerous, surviving, growing and reproducing out of ... characteristics to stop growing or to die. In breast ... sometimes promoting tumors and sometimes suppressing them. A ... the journal Oncogene details how tumors may ...
... of Texas at Austin researchers have demonstrated a new ... the heart and limbs a research advancement that ... disease, the leading cause of death in the Western ... of Engineering Assistant Professor Aaron Baker could allow doctors ...
... available in German . The Deutsche ... four new Research Units. This decision was taken by the ... of the research consortia is to offer researchers the opportunity ... and to establish innovative research directions. As with ...
Cached Biology News:Study details on-off switch that promotes or suppresses breast cancer 2New ability to regrow blood vessels holds promise for treatment of heart disease 2New ability to regrow blood vessels holds promise for treatment of heart disease 3DFG to establish 4 new research units 2DFG to establish 4 new research units 3
(Date:9/22/2014)... , September 22, 2014 ... on a mixed note as the Dow Jones Industrial ... Composite closed at 4,579.79, down 0.30%. The S&P 500 ... trading session, six out of ten sectors finished on ... Index ended the day at 751.48, up 0.10%, with ...
(Date:9/22/2014)... 2014  Spherix Incorporated (SPEX) -- an intellectual property development ... today announced that the United States Patent & Trademark Office ... month of September that is part of a standard essential ... USRE45,121 , Application number: US 13/728,867 , ... 27, 2012 The listed inventors of the ...
(Date:9/21/2014)... Chemical Sciences play a significant role in meeting ... safe water, healthy food, and dependable medicine from ... educators, and scientists have a great role in ... for the national development, and to foster research ... emerging Sciences, accelerating with a tremendous speed to ...
(Date:9/20/2014)... 20, 2014 MediVet America ... a groundbreaking surgery at the specialized Wolvega Horse Clinic. ... digital flexor tendon was ruptured 90% and her deep ... is a death sentence for a horse. , The ... cell treatments . This revolutionary regenerative option for ...
Breaking Biology Technology:Stock Updates on Biotech Industry - Array BioPharma, Enzon Pharma, Alkermes, Amarin, and Synergy Pharma 2Stock Updates on Biotech Industry - Array BioPharma, Enzon Pharma, Alkermes, Amarin, and Synergy Pharma 3Stock Updates on Biotech Industry - Array BioPharma, Enzon Pharma, Alkermes, Amarin, and Synergy Pharma 4Stock Updates on Biotech Industry - Array BioPharma, Enzon Pharma, Alkermes, Amarin, and Synergy Pharma 5Spherix Notified by United States Patent & Trademark Office of New Standard Essential Patent Issued to Spherix 2Spherix Notified by United States Patent & Trademark Office of New Standard Essential Patent Issued to Spherix 3Chemistry for Global Development during the Open Access Week 2Chemistry for Global Development during the Open Access Week 3World’s first tendon replacement using Nanofiber and activated MediVet Stem Cell Fraction 2World’s first tendon replacement using Nanofiber and activated MediVet Stem Cell Fraction 3
... 24 Huntsman Advanced Materials, a division ... announced it was awarded the JEC Award for innovative ... Huntsman received the award for the innovative use of ... with its US-based customer GrafTech International.Andre Genton, President of ...
... S.A. and,Solvay Pharmaceuticals Marketing and Licensing AG (subsidiary ... partnership agreement for the,promotion and distribution of Stallergenes ... of Independent States (CIS). , ... and a strong demand on the,part of the ...
... than 80% of Nearly 4,000 Participants Attend InformexUSA ... Chemical IndustryPRINCETON, N.J., March 24 In a ... the United States -- InformexUSA -- visitors affiliated ... said they remain on the look-out for new ...
Cached Biology Technology:Huntsman Innovation Wins Top Award at Paris JEC Show 2Stallergenes Signs an Exclusive Partnership Agreement With Solvay Pharmaceuticals for the Promotion and Distribution of its Products in Russia and the CIS* 2Stallergenes Signs an Exclusive Partnership Agreement With Solvay Pharmaceuticals for the Promotion and Distribution of its Products in Russia and the CIS* 3Informex Survey Shows Innovation Remains a Priority for 2009 and Beyond 2Informex Survey Shows Innovation Remains a Priority for 2009 and Beyond 3
Rabbit polyclonal to Aortic Elastin ( Abpromise for all tested applications). entrezGeneID: 2006 SwissProtID: P15502...
Anti-gp120/160(SIV/mac239) Immunogen: gp120(SIV/mac239) protein (Genebank accession #M33262)...
Tropomyosin 4 [Tm4]...
...
Biology Products: