The cluster analysis method of karyotype resemblance-near coefficient was used to study the relationship and evolution of seven species in the genus Kerria.

摘要运用核型近似系数聚类分析方法，分析了蚧属7种虫的亲缘关系与系统演化。

Early electrical workers used it as a coating to insulate coils, and molded it into stand-alone insulators by pressing together layers of shellac-impreg-nated paper.

早期的电力工人它用作涂料，隔离缠绕在一起的线，注满了的纸一层层地压紧制成独的绝缘物。

Aleuritic is an important raw material in the synthesis of civetone or dihydrocivetone in perfumery industry An extraction process of aleuritic acid from the seedlac was developed.

以颗粒为原料提取酸,在不加入任何有机溶剂的情况下,可获得质量分数>98%的酸产品。

Nuclear magnetic resonance techniques are used to determine the national aleutric acid preferential conformation. The results show that the dithionic hydroxyl radicals are in reciprocal cross bearing.

采用核磁共振谱法测定了国产酸的优势构象,结果表明,其分子中连二羟基处于反交叉位。