Department of Pharmacognosy, The School of Pharmacy, University of London, 29/39, Brunswick Square, WC1N 1AX, London, U.K..
Planta. 1973 Mar;111(1):33-40. doi: 10.1007/BF00386732.
The relative rates of production by mature Digitalis purpurea plants of cholesterol, campesterol, stigmasterol and sitosterol isolated from the glycoside and lipid fractions of the plant extract, were estimated. Plants were exposed to an atmosphere of (14)CO2 in a growth chamber and the radioactivity of the individual sterols assessed at intervals over 25 days on a gas-liquid radio chemical chromatography (GLRC). Incorporation of (14)CO2 occurred within 12 hours into both fractions of the extract. The 5-ene sterols were produced at a similar rate over a period of 25 days but the lipid fraction was about 100% more radioactive than the glycoside fraction.
测定了从植物提取物的糖苷和脂类部分中分离出的胆固醇、菜油固醇、豆甾醇和谷甾醇在成熟的毛地黄植物中的生成相对速率。植物在生长室的（14）CO2 气氛中暴露，并且在 25 天的间隔时间内通过气液放射性化学色谱法（GLRC）评估各个甾醇的放射性。（14）CO2 的掺入在 12 小时内发生在提取物的两个部分中。在 25 天的时间内，5-烯甾醇以相似的速率生成，但脂类部分的放射性比糖苷部分高约 100％。
