Chemical Abstracts Service Chemical Registry System. 11. Substance-related statistics: update and additions.
作者信息
Stobaugh R E
机构信息
Chemical Abstracts Service, Columbus, Ohio 43210.
出版信息
J Chem Inf Comput Sci. 1988 Nov;28(4):180-7. doi: 10.1021/ci00060a003.
PMID:3235472
Abstract
Statistics are updated for types of substances, ring systems, and elemental composition that have been determined for the Chemical Abstracts Service Registry Structure File at different points in time. This paper reports the updated figures and in addition some new statistics and offers some comparisons to show various shifts in file characteristics.
摘要
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