HOME >> BIOLOGY >> NEWS
Study: tree coring seems to be quicker, cheaper method of measuring radiation

CHAPEL HILL Monitoring uranium contamination by drilling wells costs a lot, but a new study suggests it may be possible to do the same monitoring far more cheaply by coring trees on potentially radioactive sites.

Dr. Drew Coleman, assistant professor of geologic sciences at the University of North Carolina at Chapel Hill, and his graduate student Michael Bulleri conducted the study. They presented their results today (Nov. 5) at a national meeting of the Geological Society of America in Boston.

"Based on work I did earlier, we set out to determine if we could monitor near-surface water contamination around a depleted uranium weapons manufacturing site outside Concord, Mass., by measuring uranium concentrations in the living parts of trees growing nearby," Coleman said.

Mikes results have been fantastic. By testing the sapwood the living parts of oak trees he cored close to the site -- he has found a definite bulls-eye pattern around the site where the concentration goes up the closer one gets to it.

Bulleri took all their samples on public and private lands surrounding the facility, which used to be owned by Nuclear Metals Inc. and has been owned by the Starmet Corp. since 1997.

The two tested samples using a thermal ionization mass spectrometer at UNC and a technique known as isotope dilution. They could distinguish between natural uranium from the soil and depleted uranium contamination by measuring the ratios of uranium 238 to uranium 235 in each sample.

Natural uranium has a ratio of 137.88 atoms of 238 for every one atom of 235, Coleman said. The depleted form what is left over after an enrichment process used for making nuclear fuels and bombs has a ratio of about 500 to one.

Trees suck up water beneath the ground and store the radioactivity it contains for many years, he said. Comparing isotopes allows researchers to pinpoint the radioactive contaminations source and level.

We found theres
'"/>

Contact: David Williamson
david_williamson@unc.edu
919-962-8596
University of North Carolina at Chapel Hill
5-Nov-2001


Page: 1 2

Related biology news :

1. Study: Emission of smog ingredients from trees is increasing rapidly
2. Study: A little help from friends makes wounds heal faster
3. Study: Mothers turn fearless when peptide level drops
4. Study: Artificial sweetener may disrupt bodys ability to count calories
5. Study: Mimicking viruses may provide new way to defeat them
6. Study: Stroke victims may retain continuous motion ability
7. Study: Adults maintain significant improvement in ADHD with long-term use of amphetamine
8. Study: Prenatal screening in Haiti region cut syphilis by 75 percent
9. Study: Isoflavone-enriched soy proteins fail to increase bone mineral density in young women
10. Study: Genome-wide scanning unravels complex birth defect
11. Study: Higher energy intake, obesity affects all age groups, not just youths

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


(Date:3/23/2017)... 23, 2017 The report "Gesture Recognition and Touchless Sensing ... Geography - Global Forecast to 2022", published by MarketsandMarkets, the market is expected ... 29.63% between 2017 and 2022. Continue Reading ... ... ...
(Date:3/20/2017)... At this year,s CeBIT Chancellor Dr. Angela Merkel ... came to the DERMALOG stand together with the Japanese Prime Minster Shinzo ... At the largest German biometrics company the two government leaders could see ... as well as DERMALOG´s multi-biometrics system.   Continue ... ...
(Date:3/9/2017)... and MOUNTAIN VIEW, Calif. , March ... Made Simple," and 23andMe , the leading personal ... food choices.  Zipongo can now provide customers with personalized ... health goals and biometrics, but also genetic markers impacting ... Zipongo,s personalized food decision support platform uses ...
Breaking Biology News(10 mins):
(Date:4/21/2017)... USA (PRWEB) , ... April 21, 2017 , ... ... imaging, and related applications were the focus of researchers, engineers, product developers, and ... in Anaheim. , Sponsored by SPIE, the international society for optics ...
(Date:4/20/2017)... ... April 20, 2017 , ... As part ... will explore challenging patient cases when screening for direct oral anticoagulant. When patients ... a need for bridging parental anticoagulation especially for those at high risk of ...
(Date:4/20/2017)... ... April 20, 2017 , ... Husson ... clinical research community’s growing body of knowledge during its Eighth Annual Research ... and the adjacent Darling Atrium. During the event, undergraduates, graduate students, and faculty ...
(Date:4/20/2017)... San Diego, CA (PRWEB) , ... April 20, 2017 , ... ... and management of clinical trials worldwide, announced today that they were named one of ... magazine , which covers the latest developments in the pharmaceutical industry. , “We take ...
Breaking Biology Technology:
Cached News: