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:1/22/2015)... Jan. 21, 2015  Analyst Report Issued by Small Cap IR. ... showed that planet-wide, transactions at merchants on the leading payment ... number of credit, debit, and prepaid cards reached 6.54 billion.  ... of fraudulent card usage in 2012, and credit and debit ...
(Date:1/22/2015)... NEW YORK , Jan. 22, 2015   EyeLock, Inc. ... announced it has appointed Steve Gerber to the ... Gerber will be responsible for leading development of mobile platforms ... 25 years of success and innovation in the semiconductor industry ...
(Date:12/22/2014)... Inc. (NASDAQ: NXTD and NXTDW) ("NXT-ID" or ... mobile commerce market, announces it has retained famous pickpocket, entertainer ... International CES debut of the Wocket™ biometric smart wallet.  ... NXT-ID booth January 6th and 7 th , 2015, demonstrating ...
Breaking Biology News(10 mins):$4.80 Near Term Price Target with "Buy" given by CapRock Research for NXT-ID, Inc. (NASDAQ: NXTD) issued by Small Cap IR 2EyeLock Names Steve Gerber as Senior Vice President of Mobile and Wearables 2NXT-ID Hires Master Pickpocket and Security Consultant Apollo Robbins for Wocket Smart Wallet CES 2015 Debut 2NXT-ID Hires Master Pickpocket and Security Consultant Apollo Robbins for Wocket Smart Wallet CES 2015 Debut 3NXT-ID Hires Master Pickpocket and Security Consultant Apollo Robbins for Wocket Smart Wallet CES 2015 Debut 4
... MD FASEB MARC (Maximizing Access to Research Careers) ... Society for the Study of Reproduction (SSR) Annual Meeting ... These awards are meant to promote the entry of ... of the basic science community and to encourage the ...
... systems work together to paralyze skeletal muscles during rapid eye ... 11 issue of The Journal of Neuroscience . The ... including narcolepsy, tooth grinding, and REM sleep behavior disorder. ... recalled dreams occur your eyes continue to move but ...
... has been awarded a grant expected to total more ... (NIH) National Institute of Allergy and Infectious Diseases (NIAID). ... vaccine against HIV and the disease it causes, AIDS. ... vaccine is urgently needed to slow and eventually eliminate ...
Cached Biology News:Study identifies how muscles are paralyzed during sleep 2Scripps Research Institute wins $77 million to develop AIDS vaccine center 2Scripps Research Institute wins $77 million to develop AIDS vaccine center 3
(Date:1/22/2015)... Mass. , Jan. 22, 2015   GenoSpace , a ... of tools to enable the broad use of genomic, imaging ... announced the appointment of Michelle Munson , CEO of ... director. Logo - http://photos.prnewswire.com/prnh/20150122/170713 ...
(Date:12/24/2014)... , Dec. 24, 2014 PlasmaTech Biopharmaceuticals, Inc. (NASDAQ: PTBI, ... announced the closing of an underwritten public offering of 3,500,000 ... an aggregate 3,500,000 shares of common stock, at an offering ... warrants have a per share exercise price of $5.00, are ...
(Date:12/24/2014)... Louis, Missouri (PRWEB) December 23, 2014 GMO ... biotechnology company, Syngenta, are in the process of being consolidated ... case is In Re: Syngenta AG MIR 162 Corn Litigation, ... District of Kansas. , Management of the Syngenta GMO corn ...
(Date:12/24/2014)... 2014 According to Ross Selinger, President of ... ITRA Global, the national office market continues to be strong, ... is evidenced by the third quarter’s surprising 3.9% GDP, unemployment ... energy costs have held inflation down and the Fed is ...
Breaking Biology Technology:GenoSpace Expands Board with Appointment of Michelle Munson 2PlasmaTech Biopharmaceuticals, Inc. Announces Closing of Public Offering 2PlasmaTech Biopharmaceuticals, Inc. Announces Closing of Public Offering 3Carey Danis & Lowe Reports on Syngenta GMO Corn Transfer Order 2ITRA Global Reports Long Island Is Out of Sync With The National Office Market 2ITRA Global Reports Long Island Is Out of Sync With The National Office Market 3
... Inverness Medical,Innovations, Inc. (Amex: IMA ) ... dated January 31, 2008 and entitled "Inverness Medical,Innovations ... and Medical Device Conference on February 5, 2008." ... Company,s presentation. The,correct time of the presentation is ...
... Calif., Feb. 1 Edwards Lifesciences,Corporation (NYSE: ... technologies to,treat advanced cardiovascular disease, is scheduled to ... Medical Device,Conference at the Grand Hyatt Hotel in ... M. Abate, Edwards Lifesciences, corporate vice president, chief,financial ...
... Inc.,(Nasdaq: VRUS ) management will be presenting at ... February 11 - 13, 2008 at the,Waldorf-Astoria Hotel in ... provide an overview of the company on Monday,February 11, ... Salon. In,addition, Dr. Michelle Berrey, Pharmasset,s Chief Medical Officer, ...
Cached Biology Technology:Edwards Lifesciences to Present at the Merrill Lynch Global Pharmaceutical, Biotechnology & Medical Device Conference 2Pharmasset to Present at the BIO CEO & Investor Conference 2008 on Monday, February 11th 2
Gelatin 100 mm Culture Dishes...
BD BioCoat Poly-D-Lysine/Laminin 100 mm Culture Dishes, tissue-culture treated polystyrene with a uniform application of poly-D-lysine and laminin....
BD BioCoat Laminin 100 mm Culture Dishes, tissue-culture treated polystyrene with a uniform application of mouse laminin....
The F40 piston assembly is supplied as two assemblies to service one F40 pump of a BioLogic DuoFlow workstation....
Biology Products: