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Different CAS Registry Numbers [1] are used for each form of a substance. For example, something simple like alanine will have one CAS# for the D form, another for L, another for "unspecified" and a fourth one for racemic. There would be another four CAS#s for the hydrochloride, four for the (1:1) sulfate, four for the (2:1)sulfate, etc.
:) For the entries that had a CAS number, I searched for that CAS number using SciFinder and checked if it matched the structure in the PDF file. There was one case where the stereochemistry of the structure in the PDF was wrong, but the structure in the WP article was correct!
According to CAS, his visionary view of CAS' potential "led to expansion, modernization, and the forging of international alliances with other information organizations." [15] CAS was an early leader in the use of computer technology to organize and disseminate information. [16] The CAS Chemical Registry System was introduced in 1965.
Some registration systems such as the CAS system make use of algorithms to generate unique hash codes to achieve the same objective. A key difference between a registration system and a simple chemical database is the ability to accurately represent that which is known, unknown, and partially known.
Use new products in small amounts to see how you’ll react first. Consider using an anti-fungal shampoo to reduce the amount of fungus on your scalp. When to see a doctor for scalp pain.
2. Put extra money toward your mortgage payments. Paying $50 to $100 more per month can make a real difference in building your equity and reducing the interest you pay over the life of your loan.
A Texas woman is charged with murder after police say she fatally shot her husband, lit his truck on fire and fled the scene in a kayak. Bexar County, Texas officials found the body of Tomas ...
Many of these database companies use the same name for their file format as they do for their database (including Copac, CSA, ISI, Medline, Ovid, PubMed, and SciFinder). For the ability to retrieve citations from the particular databases (rather than the file format), please refer to the database connectivity table that is below this table.