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:1/11/2017)... , Jan. 11, 2017  Michael Johnson, co-founder of Visikol ... Capital Group, Inc., has been named to the elite "Forbes 30 ...  was one of 600 people in 20 fields nationwide to be ... of the 15,000 applicants were selected. ... He is currently a PhD candidate at Rutgers ...
(Date:1/6/2017)... , Jan. 5, 2017  Delta ID Inc., ... iris scanning technology for automotive at CES® 2017. Delta ... GNTX ) to demonstrate the use of iris scanning ... and authenticate the driver in a car, and as ... the driving experience. Delta ID and Gentex ...
(Date:1/3/2017)... 2017 Onitor, provider of digital health technology ... an innovative biometric data-driven program designed to aid weight ... the 2017 Consumer Electronics Show (CES) in ... U.S., the World Health Organization (WHO), have identified lifestyle ... who are overweight or obese. WHO also states that ...
Breaking Biology News(10 mins):
(Date:1/21/2017)... , Jan. 20, 2017 Aratana Therapeutics, Inc. ... focused on the licensing, development and commercialization of innovative ... Best Company in North America ... the award based on the FDA approval of ... tablets), ENTYCE ® (capromorelin oral solution) and NOCITA ...
(Date:1/20/2017)... January 20, 2017 http://www.Financialbuzz.com ... one of leading causes of death worldwide. There were ... number of cancer related deaths increased gradually over time, ... incidence rate of various cancers continues to drive demand ... report by Global Market Insights, Inc. cancer biological therapy ...
(Date:1/19/2017)... , Jan. 19, 2017 /PRNewswire -- WuXi AppTec, ... open-access capability and technology platform, today announced that ... biology focused preclinical drug discovery contract research organization ... become a wholly-owned subsidiary of WuXi, and will ... and providing greater services. The acquisition will further ...
(Date:1/19/2017)... 2017  ArmaGen, Inc., today announced that it ... chief executive officer, as well as a member ... ArmaGen more than 17 years of executive management ... biotherapeutics and pharmaceuticals. "Mathias is ... and skillset necessary to lead ArmaGen to its ...
Breaking Biology Technology:
Cached News: