Navigation Links
'Fingerprinting' method reveals fate of mercury in Arctic snow
Date:2/10/2010

ANN ARBOR, Mich.---A study by University of Michigan researchers offers new insight into what happens to mercury deposited onto Arctic snow from the atmosphere.

The work also provides a new approach to tracking mercury's movement through Arctic ecosystems.

Mercury is a naturally occurring element, but some 2000 tons of it enter the global environment each year from human-generated sources such as coal-burning power plants, incinerators and chlorine-producing plants.

"When released into the atmosphere in its reduced form, mercury is not very reactive. It can float around in the atmosphere as a gas for a year or more, and it's not really an environmental problem at the concentrations at which it occurs," said Joel Blum, the John D. MacArthur Professor of Geological Sciences.

But once mercury is oxidized, through a process that involves sunlight and often the element bromine, it becomes very reactive. Deposited onto land or into water, the mercury is picked up by microorganisms, which convert some of it to methylmercury, a highly toxic form that builds up in fish and the animals that eat them.

As bigger animals eat smaller ones, the methylmercury is concentrated. In wildlife, exposure to methylmercury can interfere with reproduction, growth, development and behavior and may even cause death. Effects on humans include damage to the central nervous system, heart and immune system. The developing brains of young and unborn children are especially vulnerable.

The research is described in a paper published online Feb. 7 in the journal Nature Geoscience.

In the Arctic, mercury remains in its benign gaseous form through the dark winter, because there's no sunlight to drive oxidation and little bromine to catalyze the process. But in polar springtime, that all changes. As sea ice breaks up, water vapor rises in great clouds through the openings in the ice, bringing with it bromine from the sea water
'/>"/>

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

Page: 1 2 3

Related biology news :

1. Mind reading, brain fingerprinting and the law
2. New advance in revolutionary bullet fingerprinting technique
3. truTV and Cox Offer Free Digital Fingerprinting to Help Prevent Crimes Against Children
4. truTV and Cox Offer Free Digital Fingerprinting to Help Prevent Crimes Against Children
5. Fingerprinting method tracks mercury emissions from coal
6. Kount Receives Patent for Device Fingerprinting
7. DNA fingerprinting simplified
8. Method of the future uses single-cell imaging to identify gene interactions
9. Imaging method for eye disease used to eye art forgeries
10. ARS researchers develop method to speed up breeding of scab-resistant barley cultivars
11. New bioanalytical methods have potential for investigative and screening applications
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:8/20/2014)... are visible in in this image of the Para ... these were most likely intentionally set in order to ... forest or stand of trees where the land is ... include conversion of forestland to farms, ranches, or urban ... green of the Amazon Rainforest in the middle of ...
(Date:8/20/2014)... Area Lyme Foundation, which aims to make Lyme disease ... research published in an upcoming issue of the Elsevier ... The findings show that ticks that carry Lyme ... making the threat of Lyme disease year-round. The research ... Health (CDPH) Vector-borne Disease Section and University of California, ...
(Date:8/20/2014)... Research UK scientists have discovered that acral melanomas the ... Marley,s death are genetically distinct from other more common ... external) published in the journal Pigment Cell & Melanoma ... of the hands, soles of the feet, nail-beds and other ... of melanoma, it,s not caused by UV damage from the ...
Breaking Biology News(10 mins):Lyme disease risk is year-round in Northwest California, according to new study 2Lyme disease risk is year-round in Northwest California, according to new study 3Scientists learn more about rare skin cancer that killed Bob Marley 2
... Pharmaceuticals report this week that they have successfully used RNA ... mice, an advance that could lead to new treatments for ... 1998 discovery of RNA interference the naturally occurring phenomenon ... nucleus to the protein-building machinery of the cell is disrupted ...
... New Delhi, Singapore and Washington DC (Dec 28, 2010) ... identify with political parties , according to an article in ... official journal of the Western Political Science Association (published by ... studied concepts in modern political science. Scholars have long held ...
... spotlight that illuminates an otherwise dark scene, attention brings to ... A new study by researchers at the Salk Institute for ... that primarily had been known for its role in the ... the mind,s spotlight. Their findings, published in the Dec. ...
Cached Biology News:New RNA interference technique can silence up to 5 genes 2Seeing without looking 2
(Date:8/20/2014)... , Aug. 20, 2014 /PRNewswire-iReach/ -- A ... transformative collaboration between the school,s bioengineering department and ... of the Intel® Software Academic Program, UCSD,s research ... and the human body.  Photo ... study exhibits the work of Dr. Todd ...
(Date:8/20/2014)... August 20, 2014 GraphDB™ ... today including improvements to the enterprise replication cluster, ... for Lucene, SOLR and Elasticsearch. This release happens ... high performance triplestore – GraphDB™ was formerly known ... deploying the only mature enterprise resilient RDF triplestore ...
(Date:8/19/2014)... -- Research and Markets  has announced the addition of the ... report to their offering. This report analyzes ... Thousands by the following Product Segments: Media, Sera, and Reagents. ... Canada , Japan , ... Latin America . Annual estimates and forecasts are provided for ...
(Date:8/19/2014)... , Aug. 19, 2014 Research and ... Fuel Cells (SOFCs) - Global Strategic Business Report" report ... worldwide markets for Solid Oxide Fuel Cells (SOFCs) in US$ ... Canada , Europe , ... estimates and forecasts are provided for the period 2012 through ...
Breaking Biology Technology:Intel and University of San Diego Bioengineering Department Release Case Study on Health Sciences Research 2Ontotext Improves Its RDF Triplestore, GraphDB™ 6.0: Enterprise Resilience, Faster Loading Speeds and Connectors to Full-Text Search Engines Top the List of Enhancements 2Ontotext Improves Its RDF Triplestore, GraphDB™ 6.0: Enterprise Resilience, Faster Loading Speeds and Connectors to Full-Text Search Engines Top the List of Enhancements 3Ontotext Improves Its RDF Triplestore, GraphDB™ 6.0: Enterprise Resilience, Faster Loading Speeds and Connectors to Full-Text Search Engines Top the List of Enhancements 4Global Cell and Tissue Culture Supplies - Strategic Business Report 2014 2Global Solid Oxide Fuel Cells (SOFCs) - Strategic Business Report 2014 2
... SAN FRANCISCO, Calif., Nov. 1, 2010 diaDexus, Inc. ... company focused on the development and commercialization of patent-protected ... in cardiovascular disease, today announced that the company, formerly ... Bulletin Board under the ticker symbol (VXGN), has been ...
... With... -- BOZEN, Sud-Tirol, Italy, November 1, 2010 ... ... if (typeof(lpUnit)==,undefined,) var lpUnit=,PRN,; --> ... var s = ,; var first_result; // Results are keyed by longUrl, so we need to grab the first ...
... 30 Tibotec Pharmaceuticals (Tibotec) announced today the company will ... the phase 2 response-guided PILLAR study in treatment-naive patients with ... Annual Meeting of the American Association for the Study of ... be presented as part of a late-breaker oral presentation on ...
Cached Biology Technology:diaDexus Announces Name Change From VaxGen 2diaDexus Announces Name Change From VaxGen 3Health Robotics Continues Worldwide Consolidation by Entering the Norwegian Market With Beckman Automation 2Health Robotics Continues Worldwide Consolidation by Entering the Norwegian Market With Beckman Automation 3Health Robotics Continues Worldwide Consolidation by Entering the Norwegian Market With Beckman Automation 4Health Robotics Continues Worldwide Consolidation by Entering the Norwegian Market With Beckman Automation 5Health Robotics Continues Worldwide Consolidation by Entering the Norwegian Market With Beckman Automation 6Health Robotics Continues Worldwide Consolidation by Entering the Norwegian Market With Beckman Automation 7Health Robotics Continues Worldwide Consolidation by Entering the Norwegian Market With Beckman Automation 8Health Robotics Continues Worldwide Consolidation by Entering the Norwegian Market With Beckman Automation 9Week-24 Interim Results From Phase 2b PILLAR Study to be Presented as Late-Breaker at AASLD 2Week-24 Interim Results From Phase 2b PILLAR Study to be Presented as Late-Breaker at AASLD 3Week-24 Interim Results From Phase 2b PILLAR Study to be Presented as Late-Breaker at AASLD 4
Black Polypropylene 384 Round Well Plate 70/Box...
... Rabbit polyclonal to Peroxiredoxin 1 ... peroxidase family, whose mammalian members have ... proliferation, differentiation, and apoptosis. Many isoforms ... to the amino acid sequence homology, ...
... Eliminates nonspecific products due to inactivity ... allows extension through DNA regions which contain ... an 'A' overhang ,TEMPase II is ... Polymerase that remains inactive at room ...
... Synuclein Synucleins are small, soluble proteins ... certain tumors. The family includes three known ... synuclein. The alpha and beta synuclein proteins ... they are seen mainly in presynaptic terminals. ...
Biology Products: