目的: 采用分光光度法,以芦丁为标准品测定异叶青兰中的总黄酮含量. Objective: Flavonoids in Dracocephalum heterophyllum was investigated by spectrometric method with rutin as standard material.
范科艺荷兰大使馆科技参赞.Eric Van Kooij Counselor for Science & Technology, Royal Netherlands Embassy.经我方驻贵国大使馆商务参赞处介绍, 今写信给你们.The us embassy commercial counselor's office , we will write to you.承蒙贵国商务参赞告知,我得悉贵司公司名称和地址.Through ...
She affixes her real name to her writings.她的著作都署上真名.The affixes " un - " and " - less " are often used make negative words, such as unhappy or careless.词缀un - 和 -less 常用来构成否定词, 如unhappy和careless.To return to affixes, we ...