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:
(Date:2/25/2015)... 25, 2015  ABC Financial Services (ABC), the ... Health and Fitness Industry, today announced enhancements to ... The latest upgrade includes advances to the agreement ... check-in via Identity One fingerprint biometrics. The features ... interactive displays at the International Health, Racquet & ...
(Date:2/24/2015)... This report analyzes the worldwide markets for Iris ... for the US, Canada , ... Asia-Pacific , Middle East , and ... are provided for the period 2013 through 2020. Also, a ... and analytics are derived from primary and secondary research. Company ...
(Date:2/24/2015)... report analyzes the worldwide markets for Face and Voice Biometrics in ... The report provides separate comprehensive analytics for the US, ... , Asia-Pacific , Middle East ... Latin America . Annual estimates and forecasts are provided for ... provided for these markets. Market data and analytics are derived from ...
Breaking Biology News(10 mins):ABC Financial Unveils New Software Enhancements 2ABC Financial Unveils New Software Enhancements 3World Iris Biometrics Industry 2World Iris Biometrics Industry 3World Iris Biometrics Industry 4World Iris Biometrics Industry 5World Iris Biometrics Industry 6World Iris Biometrics Industry 7World Iris Biometrics Industry 8World Iris Biometrics Industry 9World Iris Biometrics Industry 10World Iris Biometrics Industry 11World Face and Voice Biometrics Industry 2World Face and Voice Biometrics Industry 3World Face and Voice Biometrics Industry 4World Face and Voice Biometrics Industry 5World Face and Voice Biometrics Industry 6World Face and Voice Biometrics Industry 7World Face and Voice Biometrics Industry 8World Face and Voice Biometrics Industry 9World Face and Voice Biometrics Industry 10World Face and Voice Biometrics Industry 11World Face and Voice Biometrics Industry 12World Face and Voice Biometrics Industry 13World Face and Voice Biometrics Industry 14World Face and Voice Biometrics Industry 15World Face and Voice Biometrics Industry 16
(Date:2/28/2015)... 2015 Increasing its efforts to resolve the ... first three episodes of The GMO TRUTH podcast on both ... as it continues its mission to discover the truth and ... phase, to “uncover the truth about the GMOs in our ... GMO Truth Podcast is an expansion of the documentary/investigative film-making ...
(Date:2/27/2015)... February 27, 2015 Immunovaccine Inc. (“Immunovaccine” ... of a fraudulent press release disseminated this morning by ... from Immunovaccine. This press release states that Immunovaccine has ... The press release did not originate from Immunovaccine ... within the press release. Please note that all ...
(Date:2/27/2015)... and SUMMERLAND, British Columbia ... (NYSE: XON ), a leader in synthetic ... to acquire  Okanagan Specialty Fruits (OSF), the pioneering ... , the world,s first non-browning apple. Through the acquisition, ... fruit that is more appetizing and convenient for consumers ...
(Date:2/27/2015)... SUNNYVALE, Calif. , Feb. 27, 2015 /PRNewswire/ ... announced that longer-term toxicology studies for its newly ... arthritis, or RA, have been completed. The results ... the U.S. Food and Drug Administration. The feedback ... completion of the ongoing first-in-human study. Additional preclinical ...
Breaking Biology Technology:The Walk a Mile Project Launches “GMO Truth” Podcast 2Immunovaccine Disclaims Hoax Press Release 2Intrexon to Acquire Okanagan Specialty Fruits 2Intrexon to Acquire Okanagan Specialty Fruits 3Intrexon to Acquire Okanagan Specialty Fruits 4Pharmacyclics Provides Clinical Update on BTK Inhibitor for Autoimmune Diseases 2Pharmacyclics Provides Clinical Update on BTK Inhibitor for Autoimmune Diseases 3
Cached News: