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American Chemical Society's Weekly PressPac -- Jan. 28, 2009
Date:2/2/2009

uded that CROPS is the only method feasible with existing technology. CROPS would be 92 percent efficient in sequestering crop residue carbon. They recommend that crop residue sequestration and its effects on the ocean should be investigated further and its implementation encouraged. - MTS

ARTICLE #3
"Ocean Sequestration of Crop Residue Carbon: Recycling Fossil Fuel Carbon Back to Deep Sediments"

DOWNLOAD FULL TEXT ARTICLE: http://pubs.acs.org/stoken/presspac/presspac/full/10.1021/es8015556

CONTACT:
Stuart E. Strand, Ph.D.
University of Washington
Seattle, Washington 98195
Phone: 206-543-5350
Fax: 206-685-3836
Email: sstrand@u.washington.edu


ARTICLE #4 FOR IMMEDIATE RELEASE

Quantum dots may be toxic to cells, environment under certain conditions
Environmental Science & Technology

Researchers in Texas are reporting that quantum dots (QDs) a product of the revolution in nanotechnology increasingly used in electronics, solar cells, and medical imaging devices may be toxic to cells under acidic or alkaline conditions. Their study, the first to report on how different pH levels may affect the safety of QDs, appears in the Jan.15 issue of ACS' Environmental Science & Technology, a semi-monthly journal.

In the new study, Pedro Alvarez, Shaily Mahendra, and colleagues note that QDs are semiconductor nanocrystals composed of a metal core surrounded by a shell composed of zinc or cadmium sulfide.

Scientists are increasingly concerned that these submicroscopic dots, about 1/50,000th the width of a human hair, could decompose during normal use or after disposal. That decomposition could release toxic metals into the environment, posing a health risk to humans and animals.

To explore this concern, the s
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Contact: Michael Woods
m_woods@acs.org
202-872-4400
American Chemical Society
Source:Eurekalert  

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