HOME >> BIOLOGY >> NEWS
Tree rings show elevated tungsten coincides with Nevada leukemia cluster

hed the UA's Laboratory of Tree-Ring Research to see if LTRR researchers could help him trace Fallon's environmental history backwards in time.

Sheppard, who works in dendrochemistry, was intrigued. He suggested combining tree-ring studies with air sampling.

The tree corers are hardened steel, so he had to figure out how to eliminate potential contamination. Sheppard eventually used laser trimming, as is used for decorative metal mailbox flags, to cut away a thin layer all around each pencil-sized tree core.

The annual rings then were analyzed for heavy metals.

To verify that differences in airborne tungsten could be detected using tree rings, the team tested trees close to and distant from a known source of airborne tungsten in Oregon.

Cores taken from trees close to that tungsten source had more tungsten than cores taken from more distant trees. Few residences and schools are located near the Oregon site.

In Fallon, the team reports finding elevated tungsten levels in about a 1.8 mile (three kilometers) radius that includes residences and schools. According to a February 2003 U.S. Health and Human Services report, (http://www.atsdr.cdc.gov/HAC/PHA/fallonair/finalair.pdf), Fallon has a facility that "houses offices, a laboratory and a tungsten carbide processing operation."

The International Agency for Research on Cancer has declared cobalt and tungsten carbide together to be a probable carcinogen. (http://monographs.iarc.fr/ENG/Meetings/vol86.php)

The biological research that has been done suggests a relationship between tungsten and cobalt and cancer but is not definitive, the researchers write.

Witten said, "There needs to be more research done to examine the relationship between these metals and the development of leukemia. We're doing
'"/>

Contact: Mari N. Jensen
mnjensen@email.arizona.edu
520-626-9635
University of Arizona
30-Apr-2007


Page: 1 2 3 4

Related biology news :

1. MIT study: Maturity brings richer memories
2. Variant CJD -- Prion amplification breakthrough brings new insights and hopes for a blood test
3. Extracting eggs from pre-pubertal cancer patients brings hope for future fertility
4. Homing pigeons get their bearings from their beaks
5. Gold nanorods assemble themselves into rings
6. Dilbert of academia brings humor to talk at UH
7. Disorderly protein brings order to cell division
8. From hot springs to rice farms, scientists reveal new insights into the secret lives of archaea
9. $1 million Myers Fellowship brings US research techniques to Melbourne
10. Flying in tune: Buzz brings mosquito pairs together
11. Watching rocks grow: Theory explains landscape of geothermal springs

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:3/22/2016)... 22, 2016 According ... Market for Consumer Industry by Type (Image, Motion, ... (Communication & IT, Entertainment, Home Appliances, & ... to 2022", published by MarketsandMarkets, the market ... reach USD 26.76 Billion by 2022, at ...
(Date:3/18/2016)... 18, 2016 --> ... ICT, Manned & Unmanned Vehicles, Physical infrastructure and Perimeter Surveillance ... in the border security market and the continuing migration crisis ... Europe has led visiongain to publish this ... --> defence & security companies in the ...
(Date:3/15/2016)... 15, 2016 Yissum Research Development Company ... company of the Hebrew University, announced today the formation ... technology of various human biological indicators. Neteera Technologies has ... from private investors. ... detection of electromagnetic emissions from sweat ducts, enables reliable ...
Breaking Biology News(10 mins):
(Date:5/6/2016)... 2016 Recent studies show that patients no ... medication when treating certain types of pain. With the ... can go right to the source instead of masking ... organization, provides physician training about the benefits of regenerative ... find physicians across the United States ...
(Date:5/6/2016)... ... 2016 , ... This June 3-6, SonoDepot will host booth 500 ... service provider of the ALPINION line, reps will educate attendees about the latest in ... management. The event draws more than 2,200 biomedical equipment technicians, clinical engineers, and others ...
(Date:5/5/2016)... Atlanta, Georgia (PRWEB) , ... May 05, 2016 ... ... Patent and Trademark Office has granted two additional patents, U.S. Patent Nos. 9,322,133 ... These patents cover processes for making nanocellulose as well as hydrophobic nanocellulose compositions. ...
(Date:5/5/2016)... ... May 05, 2016 , ... ProMIS Neurosciences (“ProMIS” or ... three targets, it has identified a fourth in a series of novel potential ... and progression of Alzheimer’s disease (AD). , “This discovery is an ...
Breaking Biology Technology:
Cached News: