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- Huperzine A and huperzine B are two of the chemicals that have been separated from Chinese club moss. 石杉碱甲和石杉碱乙是从中国杵状苔藓中分离提取的主要化学物质。
- Huperzine B is also an acetylcholinesterase inhibitor, but because its effects are much weaker than those of huperzine A, most research has focused on huperzine A. 石杉碱乙同样也可以抑制乙酰胆碱酯酶，但由于其效果弱于石杉碱甲，故偏重于石杉碱甲的提取。
- Keywords Huperzia Serrata Huperzine A Huperzine B Microwave-assisted extract Orthogonal test; 千层塔;石杉碱甲;石杉碱乙;微波协助提取;正交试验;
- Keywords Huperzine A;Huperzine B;ultrasonic extract;orthogonal test;Huperzia serrata; 蛇足石杉;石杉碱甲;石杉碱乙;超声提取;正交试验;
- Keywords Huperzia serrata;huperzine A;huperzine B;integrated low-pressure liquid chromatography;separation and purification; 蛇足石杉;石杉碱甲;石杉碱乙;低压组合液相层析;分离纯化;
- In English, b, p, m and w are bilabials. 英语中的b、p、m、w为双唇音。
- C comes after B in the alphabet. 在字母表中C接在B后面。
- The "b" in "comb" is not sounded. comb这个词里的"b"是不发音的。
- The old woman does not know from A to B. 这位老太太一字不识。
- B comes before C in the alphabet. B在字母表里排在C之前。
- huperzine B 石杉碱乙(抗胆碱酯酶作用)
- (Makino) Ching (Huperziaceae). Their structures were identified as luciduline (1), dihydroluciduline (2), lycodine (3) ,huperzine B (4) ,serratinine (5) . serratidine (6) ,macleanine (7), respectively,on the basis of spectral evidences. 从东北石杉中分离得到7个石松生物碱,通过NMR、MS及IR等光谱分析,分别鉴定为:luciduline(1),dithydroluciduline(2),lycodine(3),huperzine B(4),serratinine(5),serratidine(6),mecleanine(7)。
- Line A is four times the length of line B. 线条
- Many letters in the alphabet such as b, c, d, etc are consonants. 字母表中的许多字母像b，c，d，等等都是辅音字母。
- B, c, d, f, etc. are consonants. B,c,d,f等都是辅音字母。
- Mr A had called out Mr B for his abusive words. B先生辱骂了A先生，A先生要求和他决斗。
- Student B: Tug of war by ten thousands people? 学生乙：万人拔河?
- Team A beat team B (by a score of) two to one. 甲队以二比一胜乙队。
- Some vitamin B and C will build up your resistance. 吃些维他命B和C能增强你的抵抗力。
- A：Don't say that! B: Yes, I will. 甲：别那么说!乙：不，我就是要说。
