美国《化学文摘》(简称CA)是世界三大化学文摘之一 ,收录 15 0个国家和地区、5 6种文字出版的 16 0 0 0种期刊 ,还收录会议录、新书 ,及 2 7个国家和 2个国际专利组织的专利文献 ,其中约 1/ 3的文献为生物医学文献 ,其优点是文献质量较高、范围广 ,是从新学科、边缘学科、相关 The United States “Chemical Abstracts” (CA) is one of the world’s three major chemical abstracts, contains 160 countries and regions, 56 kinds of text published 160 kinds of periodicals, also recorded minutes, new books, and 27 The patent literature of the country and two international patent organizations, of which about one-third of the literature is biomedical literature, the advantage of the literature is the quality of a wide range of new disciplines, the edge of discipline, related