This issue of the American Chemical Society (ACS) News Service Weekly press package (PressPac) is a special edition with selections from scientific presentations scheduled for the ACS national meeting in San Francisco. Our regular coverage of reports from 34 major peer-reviewed journals and Chemical & Engineering News will resume with the Sept. 20, 2006 edition.

In this Special Edition:

• Adult stem cells show wider potential than previously thought
• Elasticity of tissue environment plays role in determining stem cell growth
• 'Stretched' stem cells have potential to be transformed into blood vessel cells
• Pesticide exposure could increase risk of early onset of Parkinson's disease
• California scientists find natural way to control spread of destructive Argentine ants
• National Meeting Resources for Journalists

PressPac information is intended for your personal use in news gathering and reporting and should not be distributed to others. Anyone using advance PressPac information for stocks or securities dealing may be guilty of insider trading under the federal Securities Exchange Act of 1934.

The ACS National Meeting Press Office in San Francisco (415-978-3532) and the ACS Office of Communications in Washington (202-872-4400) can provide assistance in arranging interviews with researchers. For full news releases on these topics, nontechnical summaries provided by researchers, and other national meeting news media resources http://www.eurekalert.org/acsmeet.php.

Please indicate that this research was presented at the American Chemical Society's national meeting.

NOTE: A press briefing with call-in audio participation will be held on Articles 1-3. Reporters are asked to call in five to ten minutes prior to the scheduled start time. Reporters will be asked to identify themselves, their affiliations an
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Contact: Michael Woods
m_woods@acs.org
American Chemical Society
18-Sep-2006