Generally, synthetic means pertaining to synthesis, i.e., the putting-together of two or more parts into a coherent whole, whether by design or by natural processes.

• In philosophy, see synthetic proposition.
• In mathematics Synthetic Division refers to Ruffini's rule
• In chemistry, see chemical synthesis.
• In linguistics, see synthetic language.
• In sociolinguistics, see synthetic personalisation.
• In fibers, see synthetic fiber
• See also synthesizer

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ACS Weekly Newsletter

Organic Reactions and Syntheses
Mon, 29 Sep 2008 17:00:00 -0500
Don't miss the latest cutting-edge conference from ACS ProSpectives! "Organic Reactions and Syntheses" will be held Oct. 26-28, 2008, in Philadelphia, with a program featuring leading researchers. Complete details can be found online, including the speakers and abstracts, the detailed program, and registration online or by mail or fax.
New on JACS Beta: JACS Select
Mon, 29 Sep 2008 17:00:00 -0500
JACS Select is the new name for the thematic, web-based collections of recently published papers from JACS, available now on the JACS Beta site, and compiled to both highlight and further explain topics of interest to the journal's diverse audience. Each JACS Select collection is complemented by a guest editorial helping to frame the selected field, while all articles featured are supplemented with synopses and will remain free to non-subscribers for a limited time. In addition to JACS Select, there are a number of new features that have recently been added to the JACS Beta site including the JACS Image Challenge, a link to the JACS Facebook page, the JACS Desktop Widget, and more. Stay apprised of new developments on the site by signing up for the RSS feed.
Attention, International Chemists: Changes to VWP
Mon, 29 Sep 2008 17:00:00 -0500
If you are planning to travel from outside the U.S. to attend one of the ACS National Meetings in 2009, you should be aware of a significant change in the process by which the Department of Homeland Security (DHS) screens passengers traveling to the U.S. under the Visa Waiver Program (VWP). Under the VWP, citizens of certain countries may travel to the U.S. for tourism or business for 90 days or less without obtaining a visa. DHS has announced that, effective January 12, 2009, it will implement a new Electronic System for Travel Authorization (ESTA) for pre-travel authorization for visa-waiver travelers visiting the U.S.; applications for ESTA can be submitted now. More information, including eligible countries and application details, can be found on the VWP and ESTA web pages.
Noteworthy Chemistry
Mon, 29 Sep 2008 16:00:00 -0500
Here's an easy way to convert aldehydes to homologated carboxylic acids. L. R. Cafiero and T. S. Snowden at the University of Alabama ( Tuscaloosa ) show that aldehydes can be treated with CCl 3 CO 2 Na or CHCl 3 and base to form an intermediate trichloromethylcarbinol using previously reported methods. The alcohol is then converted by one of two methods under mild conditions to give one-carbon homologated carboxylic acids. The first method (A) uses NaBH 4 under alkaline conditions to convert aryl and alkyl aldehydes to the desired homologated carboxylic acids in yields of 76-94%.
Patent Watch: Pretreat impure vegetable oils for biodiesel processing
Mon, 29 Sep 2008 16:00:00 -0500
The most widely used process for making biomass-derived diesel fuels is the esterification of vegetable oils with MeOH-with NaOH as the catalyst-to give fatty acid methyl esters (FAMEs), otherwise known as biodiesel. However, as biodiesel producers struggle to make a profit, they seek lower cost, less pure feedstocks.

Noteworthy Chemistry, a product of the American Chemical Society

Pretreat impure vegetable oils for biodiesel processing.
Mon, 29 Sep 2008 09:20:31 -0400
Pretreat impure vegetable oils for biodiesel processing.

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