FCC catalysts using silica sol as the binder features improved selectivity to coke and higher resistance to attrition. strength of the catalysts can be enhanced by adding surf…
含硅粘结剂的催化剂抗磨损能力和焦炭选择性较好，催化剂的强度可以通过添加表面活性剂和铝盐得到改善。
Selectivity may be improved for some analytes by incorporation of separation steps prior to immunoassay.
在免疫测定前加入分离步骤，一些分析物的选择性可能会提高。
Compared with free lipase, the thermostability(thermal stability) of immobilized lipase was improved(increased) by 30%; however, no significant changes in selectivity was observed.
与游离脂肪酶相比较，固定化脂肪酶热稳定性提高了30%，而选择性没有显著变化。
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