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American Chemical Society's weekly PressPac -- Jan. 2, 2008
Date:1/7/2008

bi-monthly journal.

In the study, Bruno Clair and colleagues point out that whereas normal wood tends to shrink a small amount when dried, TW undergoes surprisingly high shrinkage. This shrinkage makes it undesirable for use in sun decks and other construction applications. Now, researchers want a valid explanation for this phenomenon.

In the current study, Clair and colleagues collected TW and normal wood samples from a chestnut tree and exposed the samples to different drying conditions. Using nitrogen adsorption, a technique to measure the porosity of materials, they found that the TW was composed of a gel-like layer with a surface area more than 30 times higher than in normal wood. The collapse of this gel during drying likely caused TWs high shrinkage rate, the scientists say. The finding could lead to ways to reduce this shrinkage in order to make TW more usable for construction applications. MTS

ARTICLE #4 FOR IMMEDIATE RELEASE Characterization of a Gel in the Cell Wall To Elucidate the Paradoxical Shrinkage of Tension Wood

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CONTACT:
Bruno Clair, Ph.D.
Universit Montpellier 2, CNRS
Montpellier, France
Phone: 33 4 6714 4918
Fax: 33 4 6714 4792
Email: clair@lmgc.univ-montp2.fr


ARTICLE #5 EMBARGOED FOR 9 A.M., EASTERN TIME, Jan. 7, 2008

Discovery of enzymes structure may lead to new treatments for celiac disease
Chemical & Engineering News

Researchers have discovered a new structure for a key enzyme associated with celiac disease, a finding that could l
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Contact: Michael Woods
m_woods@acs.org
202-872-4400
American Chemical Society
Source:Eurekalert  

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