The yield of petroleum ether extractives from the crowns of C. lanceolata was 5 4% of its dry weight.
杉木绿冠的石油醚提取物得率，为其绝干重量的5．4％。
2
The effects of NC dry weight, the water contents of dehydrated NC and centrifugal alcohol dehydrated NC and ether added quantity on the contracting percentage of grains have also been discussed.
讨论了硝化棉干量、脱水棉及酒精驱水棉的水分含量以及乙醚加入量对药粒收缩率的影响。
3
The low degree of substitution cationic starch was synthesized in dry process by using petroleum ether as dispersant. The reaction efficiency was more effective and the product was more homogeneous.