本文研究了联苯取代物双电荷离子2E谱及其取代基效应和靶气压力影响。
A study of doubly charged ion mass spectra (2E spectra), the substituents effect and the target gas pressure deppendence of biphenyl derivitives was presented in this work.
该文介绍油脂取代物出现、分类和国外对碳水化合物油脂模拟物研究与应用。
The appearance and classification of fat replacer, study and application of carbohydrate fat-mimetic overseas are introduced in the paper.
药理试验表明：上述化合物均有不同程度的口服抗早孕活性，其中以2-联苯基取代物活性较高。
These derivatives showed certain pregnancy terminating activity in aminal tests. Among them, 2-biphenylyl group compounds exhibited more potent activity than the others.
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