Navigation Links
Increasing levels of rare element found worldwide
Date:4/21/2009

HANOVER, NH Dartmouth researchers have determined that the presence of the rare element osmium is on the rise globally. They trace this increase to the consumption of refined platinum, the primary ingredient in catalytic converters, the equipment commonly installed in cars to reduce smog. A volatile form of osmium is generated during platinum refinement and also during the normal operation of cars, and it gets dispersed globally through the atmosphere.

While osmium is found naturally, the researchers were surprised to discover that most of the osmium in rain and snow, and in the surface waters of rivers and oceans, is produced during the refining of platinum. "It's interesting, maybe ironic, that we stopped adding lead to gasoline in the 70s so that catalytic converters could be introduced to remove smog from car exhaust," says Dartmouth Associate Professor of Earth Sciences Mukul Sharma. "Now we learn that using platinum in the converters is responsible for an increase in osmium. Fortunately, unlike lead, the concentration of osmium in water is extremely small and may not adversely affect biology."

Sharma worked with Dartmouth Ph.D. student Cynthia Chen and Peter Sedwick at Old Dominion University. Their study will be published in the online edition of the Proceedings of the National Academy of Sciences during the week of April 20, 2009.

The research team measured osmium in precipitation in North America, Europe, Asia, and Antarctica, and in both surface water and deep water from the North Atlantic, Pacific, Indian, and Antarctic (or Southern) Oceans. Human-made osmium also comes from chromium smelters, hospital incinerators, and the normal operation of cars, but it's primarily the industrial extraction and refining of platinum that produces the bulk of the osmium found in rain and snow.

Sharma explains that about 95 percent of the world's platinum comes from South Africa and Russia where it is roasted at extremely
'/>"/>

Contact: Sue Knapp
sue.knapp@dartmouth.edu
603-646-3661
Dartmouth College
Source:Eurekalert

Page: 1 2

Related biology news :

1. GEN highlights increasing use of digital gene expression profiling
2. UConn chemists find secret to increasing luminescence efficiency of carbon nanotubes
3. Time running out on coral reefs as climate change becomes increasing threat
4. Nitrate concentrations of ground water increasing in many areas of the United States
5. Biological invasions increasing due to freshwater impoundments, says CU-Boulder study
6. The epigenetics of increasing weight through the generations
7. Growth hormones link to starvation may be clue to increasing life span, researchers find
8. Organic corn: Increasing rotation complexity increases yields
9. Increasing nitrogen pollution overwhelms filtering capability of streams
10. Mountain summits in the Alps becoming increasingly similar
11. Toxic releases down from North American industry leaders, increasing from other facilities
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:9/16/2014)... "molecular brakes" that time the generation of important cells ... cells" translate sound waves into electrical signals that are ... If the arrangement of the cells is disordered, hearing ... will be published in The Journal of Neuroscience ... Hey2 act as brakes to prevent hair cell generation ...
(Date:9/16/2014)... inherit certain traits from our parents that are pre-determined. ... play out by taking certain drugs or better yet, ... team of researchers at the Boston University School of ... research. , Epigenetics regulates gene expression in a ... which prevent permanent mutations or alterations within the gene ...
(Date:9/16/2014)... its own bacterial identity. That,s the conclusion of University ... studied the genetic fingerprints of bacteria on 57 species ... study demonstrates for the first time that host plants ... possess very different microbial communities on their leaves," said ... in the UO,s Institute of Ecology and Evolution who ...
Breaking Biology News(10 mins):Hey1 and Hey2 ensure inner ear 'hair cells' are made at the right time, in the right place 2Epigenetic drugs: A hope to treat cancer resistance and reduce cancer relapse? 2Epigenetic drugs: A hope to treat cancer resistance and reduce cancer relapse? 3Microbiome research shows each tree species has a unique bacterial identity 2
... Joslin scientists report the first generation of human induced pluripotent ... maturity onset diabetes of the young (MODY). These cells offer ... in the development of MODY and testing potential treatments. The ... Human induced pluripotent stem cells (hiPSCs) are adult cells ...
... 2013 -- Deborah E. Wiley, Chair of The Wiley ... JWb), announced today that the twelfth annual Wiley Prize ... Young, Rockefeller University, Dr. Jeffrey Hall, Brandeis University (Emeritus), ... Prize is being awarded to Dr. Young, Dr. Hall ...
... Researchers from the group on stem cells and cancer at ... of the gene regulation circuits which would make it possible ... This finding is essential to generate these cells in a ... with leukaemia or other diseases who need a transplant and ...
Cached Biology News:Joslin scientists find first human iPSC from patients with maturity onset diabetes of the young 212th annual Wiley Prize in Biomedical Sciences awarded 212th annual Wiley Prize in Biomedical Sciences awarded 31 of the key circuits in regulating genes involved in producing blood stem cells is deciphered 2
(Date:9/17/2014)... (PRWEB) September 17, 2014 NASA’s MESSENGER ... Valcor Engineering Corporation is proud to have one of ... The MESSENGER mission is a scientific investigation of the ... to be sent there, and has provided a vast ... Valcor’s V27200 family of latch valves utilize solenoids that ...
(Date:9/16/2014)... , Sept. 16, 2014 This report analyzes the ... Product Segments: Software, Hardware, and Biocontent. The report provides separate ... Japan , Europe , ... , and Rest of World. Annual estimates and forecasts are ... historic analysis is provided for these markets. Market data and ...
(Date:9/16/2014)... From cell phones to cars and flashlights, ... Scientists and technology companies constantly are seeking ways ... the first time using a water-based solution, researchers ... long-lasting and more efficient nuclear battery that could ... reliable energy source in automobiles and also in ...
(Date:9/16/2014)... , Sept. 16, 2014  Donald Fresne, President and ... of Stephan Vagner , PhD to its Scientific Advisory ... of Toulouse, France , performed research at ... , and at Inserm, the French institute of health and ... works both at the Curie Institute, Orsay, France ...
Breaking Biology Technology:Global Bioinformatics Industry 2Global Bioinformatics Industry 3Global Bioinformatics Industry 4Global Bioinformatics Industry 5Global Bioinformatics Industry 6Global Bioinformatics Industry 7Global Bioinformatics Industry 8Global Bioinformatics Industry 9Global Bioinformatics Industry 10Global Bioinformatics Industry 11Global Bioinformatics Industry 12Global Bioinformatics Industry 13Global Bioinformatics Industry 14Global Bioinformatics Industry 15Global Bioinformatics Industry 16Global Bioinformatics Industry 17Global Bioinformatics Industry 18Global Bioinformatics Industry 19Global Bioinformatics Industry 20Global Bioinformatics Industry 21Global Bioinformatics Industry 22Global Bioinformatics Industry 23New Appointment to the Scientific Advisory Committee at Egenix, Inc. 2
... Improve Diabetes Care, PERRYSBURG, Ohio, Feb. 25 ... medical, humanistic and financial elements of,diabetes care will ... (NBCH). FrontPath Health Coalition, through its non-profit Western,Lake ... lead this,community-wide effort that includes the City of ...
... NEW YORK, Feb. 25 Care to Care, a ... has signed,Touchstone Health HMO Inc. as a client. As ... portfolio has grown to over 700,000,lives., (Logo: ... and flattered to be selected as the Radiology,Benefit Manager ...
... One-year Agreement With Guaranteed Purchase Minimums - Carrington Provides ... ... Distribution, IRVING, Texas, Feb. 25 ... has signed,a supply agreement with Universal Harvest Corporation of Nevada. ...
Cached Biology Technology:FrontPath Health Coalition To Lead Community-wide Group in Pilot Program 2FrontPath Health Coalition To Lead Community-wide Group in Pilot Program 3Care to Care Begins Providing Radiology Benefit Management Services to Touchstone Health 2Carrington and Universal Harvest Sign Supply Agreement 2
Please email us with project details and we will respond within 24 hours to your query!...
Loading Buffer...
"BioTracker 6X Bromophenol Blue Tracking Dye is composed of 60% St DI H2O, 30% Glycerol, 10% 10XTE, 0.25% BPB Dye and 0.85% SDS....
Request Info...
Biology Products: