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:
(Date:7/28/2014)... Wyss Institute for Biologically Inspired Engineering at Harvard ... will be commercialized by a newly formed private ... and personalized medicine products. The announcement ... of Technology Development (OTD) and the start-up Emulate ... automated human Organs-on-Chips platform. , "This is ...
(Date:7/27/2014)... that nicotine and cotinine, a metabolite of nicotine, can ... in smoke. , The carcinogen 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanone or NNK is ... ends up in the tobacco smoke. Once inhaled, it ... is activated by a variety of enzymes called Cytochrome ... nicotine can partially interfere with the activation of NNK, ...
(Date:7/27/2014)... of mayfly in the southern Western Ghats, a mountain range ... the first time that any mayfly belonging to the genus ... The new species, called Labiobaetis soldani , "is named ... to the understanding of the Ephemeroptera of Palaearctic and Oriental ... the new mayfly in the Journal of Insect Science ...
Breaking Biology News(10 mins):Wyss Institute's technology translation engine launches 'Organs-on-Chips' company 2Wyss Institute's technology translation engine launches 'Organs-on-Chips' company 3Nicotine found to inhibit DNA-strand break caused by a certain carcinogen in smoke 2
(Date:7/28/2014)... , July 28, 2014 Sapphire Energy, ... today announced the appointment of biotechnology veteran James ... board of directors. Levine replaces Cynthia ,CJ, Warner, who ... will remain chairman of the company,s board of directors. ... Energy,s mission to deliver commercial scale algae-based fuels has ...
(Date:7/28/2014)... 2014 “2014 Deep Research ... is a professional and in-depth research report ... report introduces Lubricant basic information, including Lubricant ... and industry overview. This research covers the ... as well as global industry analysis covering ...
(Date:7/28/2014)... Junction, MD (PRWEB) July 28, 2014 ... in personalized medicine, will be exhibiting data and research ... year’s International Spine Intervention Society’s (ISIS) 22nd ... 30th-August 3rd, at the Hyatt Regency, in Orlando, Florida. ... the knowledge and clinical competence of physicians who care ...
(Date:7/28/2014)...   JOLT , a leading technology accelerator, announced today ... portfolio of startups. Next-level tech and boundary-pushing innovation have ... accelerator, and Cohort four is no exception, with six ... its launch in July 2012, JOLT has produced 17 ... at 23 investments, JOLT,s portfolio has an overall mix ...
Breaking Biology Technology:Sapphire Energy Announces New CEO James Levine 2Sapphire Energy Announces New CEO James Levine 3Lubricant Market & Adhesion Promoter Industry (Globa, China) Analysis Now Available at DeepResearchReports.com 2Lubricant Market & Adhesion Promoter Industry (Globa, China) Analysis Now Available at DeepResearchReports.com 3Lubricant Market & Adhesion Promoter Industry (Globa, China) Analysis Now Available at DeepResearchReports.com 4Proove Biosciences Exhibits Industry Leading Data and Research at International Spine Intervention Society’s 22nd Annual Scientific Meeting 2JOLT Announces the Next 6 Startups to Join its Summer 2014 Cohort 2JOLT Announces the Next 6 Startups to Join its Summer 2014 Cohort 3
Cached News: