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

Tungsten began increasing in trees in Fallon, Nev. several years before the town's rise in childhood leukemia cases, according to a new research report.

The amount of tungsten in tree rings from Fallon quadrupled between 1990 and 2002, whereas the amount in tree rings from nearby towns remained the same, according to a research team led by Paul R. Sheppard of The University of Arizona's Laboratory of Tree-Ring Research.

This is the first study that has examined changes in levels of heavy metals in Fallon over time.

"Trees take up metals from the environment and those metals show up in the tree rings. By analyzing chemicals in tree rings, we can look back in time years, and even decades," said Sheppard, a UA assistant professor of dendrochronology.

"Tree ring values for the early 1990s for tungsten are roughly equivalent to nearby towns, but go up in Fallon in the mid-1990s while staying the same in other towns," he said.

Tungsten levels in Fallon trees began increasing in 1994, while levels in neighboring towns remained the same. Since 1997, 17 cases of childhood leukemia have been diagnosed in children who lived in the Fallon area for some time prior to diagnosis. Fallon's high incidence of leukemia has been acknowledged as a leukemia cluster by the Nevada State Health Division. (http://health.nv.gov/index.php?option=com_content&task=view&id=356&Itemid=595 )

The tree-ring study by Sheppard and his co-authors Robert J. Speakman of the Smithsonian Institution in Suitland, Md., Dr. Gary Ridenour of Fallon and Mark L. Witten, a UA research professor of pediatrics, is in the May 2007 issue of Environmental Health Perspectives.

A list of funding sources and the complete citation for the article is at the bottom of this release.

In a 2003 U.S. Health and Human Services report investigating possibl
'"/>

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:10/29/2014)... have been blamed for increasing the risk of ... family history of schizophrenia, are widely accepted. Others, ... a parasite transmitted by soil, undercooked meat and ... A new study by Gary Smith, professor of ... Pennsylvania,s School of Veterinary Medicine, used epidemiological modeling ...
(Date:10/29/2014)... number of chemicals from household and industrial products are ... bodies. But for most of them, scientists have yet ... taken the first step toward doing that by estimating ... new method is published in the ACS journal ... and colleagues note that the risks to human health ...
(Date:10/29/2014)... on September 19, 2014, leading geneticist and humanitarian Prof. ... Sciences and Medicine at the University of Washington in ... Aviv University, was awarded the 2014 Lasker-Koshland Special Achievement ... honorary degree from TAU, Prof. King was the 2012-2013 ... for the past 18 years she has been the ...
Breaking Biology News(10 mins):Penn vet professor investigates parasite-schizophrenia connection 2Penn vet professor investigates parasite-schizophrenia connection 3Geneticist and humanitarian: Prof. Mary-Claire King receives Lasker Award 2
(Date:10/30/2014)... Ras Al Khaimah, UAE (PRWEB) October 30, 2014 ... the appointment of Dr. James A. Manganello, Chairman of the ... (NSCEC) of The Bahamas. The appointment was made by ... The Bahamas on September 24th, 2014. , More ... Cell Therapy and Research Bill , Prime Minister Perry Christie ...
(Date:10/30/2014)... in the development of quantum technologies has been proposed ... published today (28 October) in Nature Communications , ... a new type of flexibly designed microscopic trap for ... and specialised superfast computers, often depend on harnessing the ... these tiny particles are hugely problematic because of the ...
(Date:10/27/2014)... 27, 2014 The Italian ... exhibit and sell its artificial "lower limb", after ... patent.      (Photo: http://photos.prnewswire.com/prnh/20141027/713097 ... fighting, the definitive judgement has arrived: Roadrunnerfoot, the ... and accessible hi-tech prostheses with composite materials, has ...
(Date:10/27/2014)... MA (PRWEB) October 27, 2014 ... profit. SoundConnect , an industry leading unified ... its partners and agents to deliver cloud-based audio ... accelerate growth opportunities. , With SoundConnect’s Q4 ... every twenty-five video and/or web conferencing licenses sold, ...
Breaking Biology Technology:Grace Century’s Stem Cell Biobank Project Announces Chairman’s Appointment to National Stem Cell Ethics Committee of The Bahamas 2Grace Century’s Stem Cell Biobank Project Announces Chairman’s Appointment to National Stem Cell Ethics Committee of The Bahamas 3Italian Lower Limb Prosthesis Company Wins Lawsuit Against German Giant Ottobock 2SoundConnect Unveils Q4 Partner Incentives 2
Cached News: