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％。
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。
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.
用石油醚作为分散剂，干法制备低取代度阳离子淀粉，反应效率更高，产品更均一。
METHODS using alcohol to extract Tripterygium wilfordii, and using acetic ether to elution, and then vaporizing acetic ether to obtain dry powder.
方法雷公藤根茎先用乙醇提取，然后用乙酸乙酯洗提，最后挥干溶剂得干品。
METHODS using alcohol to extract Tripterygium wilfordii, and using acetic ether to elution, and then vaporizing acetic ether to obtain dry powder.
方法雷公藤根茎先用乙醇提取，然后用乙酸乙酯洗提，最后挥干溶剂得干品。
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