豆甾醇

This method has been successfully applied to the determination of phytosterol and cholesterol in oil.

植物甾醇的种类很多，但在自然界普遍存在的主要为菜油甾醇、豆甾醇、β谷甾醇、菜子甾醇。

F. Their structures were identified as betulone (1), 3,4,5-trimethoxyphenol-β-D-glucopyranoside (2),α-amyrin (3),β-amyrin (4),β-sitosterol (5), and stigmasterol (6) by spectroscopic evidence (IR, NMR, MS, etc.) and comparision of their spectral data with those of the literatures.

F。 的乙醇提取物中分离得到6个化合物，经波谱分析及与文献数据对照确定其结构分别为：betulone (1)、3，4，5-三甲氧基苯酚-β-D-吡喃葡萄糖苷(2)、α-香树脂醇(3)、β-香树脂醇(4)、β-谷甾醇(5)和豆甾醇(6)。

Tofu does not contain cholesterol, the "three high" crowd and arteriosclerosis, coronary heart disease in patients with delicacies; tofu in a rich plant estrogen in the prevention and treatment of osteoporosis have a good effect; tofu in the steroid steroids, stigmasterol, is the active ingredient in inhibiting cancer.

豆腐不含胆固醇，是"三高"人群及动脉硬化、冠心病患者的佳肴；豆腐中丰富的植物雌激素，对防治骨质疏松症有良好的作用；豆腐中的甾固醇、豆甾醇，是抑制癌细胞的有效成分。

Keywords infrared spectrophotometry;stigmasterol acetate;β sitosterol acetate;quantitative analysis

红外分光光度法；豆甾醇乙酯；β-谷甾醇乙酯；定量分析

The concentrations of P-sitosterol, campesterol, stigmasterol, p-sitostanol, and campestanol in 150 samples were analyzed by GC methods, moreover, the total contents and the relative contents were calculated.

研究结果利用优化的前处理方法和GC分析条件，各甾醇的分离效果好，且杂峰少；植物油中菜油甾醇、豆甾醇、β-谷甾醇的回收率分别为100.4％、93.3％、103.3％。

Phytosterols are a group of components naturally occurring in all plants and are structurally similar to cholesterol. Until now, numerous unique phytosterols have been identified, p-sitosterol, campesterol, and stigmasterol account for the largest proportion in most sources, and the saturated phytosterol are called "phytostanol", such as sitostanol and campestanol.

植物甾醇是存在于植物中的一大类化学物质的总称，其结构与胆固醇相似，几乎存在于所有的植物性食物中，最常见的包括β-谷甾醇、菜油甾醇、豆甾醇，其次是植物甾醇的饱和形式，即β-谷甾烷醇和菜油甾烷醇等。

Results Eleven compounds were purified and their structures were identified, they were identified as β-sitosterol, stigmasterol, nonacosanyl caffeate, daucosterol, betulinic acid, vanillic acid, inositol methyl ether, sucrose, soyasaponin Ⅰ, kaikasaponin Ⅲ, and dehy-drosoyasaponin Ⅰ.

结果 分得11个已知化合物，经鉴定为β-谷甾醇、豆甾醇、咖啡酸二十九醇酯、胡萝卜苷、白桦酸、香草酸、肌醇甲醚、蔗糖、soyasaponin Ⅰ、kaikasaponin Ⅲ和dehy-drosoyasaponin Ⅰ。

Result:Eight compounds were elucidated as β amyrin palmitate, taraxastery acetate, luteolin 7 O α L rhamanopyranosyl (1→2)β D glucopyranoside,luteolin 7 O β D glucopyranoside, triacontanic acid,β sitosterol, stigmasterol and stigmast 7 en 3β ol.

结果 ：从全草中分离得到 5个化合物，β香树脂醇棕榈酸酯，蒲公英醇乙酸酯，木樨草素 7 O α L 鼠李糖基(1→ 2 )β D 葡萄糖苷，木樨草素 7 O β D 葡萄糖苷，三十碳酸；1个混合物，β谷甾醇、豆甾醇、豆甾 7 烯 3β醇。

RESULTS: Sixteen compounds, ursolic acid (1), indole-3-carboxaldehyde (2), indole-3-carboxylic acid (3), p-coumaric acid (4), azelaic acid (5), N-trans-feruloyl tyramine (6), blumenol A (7), 2-hydroxy-3-methylanthraquinone (8), rubiadin l-methyl ether (9), rubiadin (10), quercetin (11), luteolin (12), chrysoeriol 6-C-β-boivinopyranosyl-7-O-β-glucopyranoside (13), alternanthin (14), stigmasta-5, 22-dien-3β-ol (15), and α-spinasterol (16) were obtained from the EtOAc extract of Alternanthera philoxeroides.

结果：得到并鉴定了16个化合物，分别为乌苏酸(1)、吲哚-3-甲醛(2)、吲哚-3-甲酸(3)、对-香豆酸(4)、壬二酸(5)、N-反式阿魏酰基酪胺(6)、布卢姆醇A(7)、2-羟基-3-甲基蒽醌(8)、甲基异茜草素-1-甲醚(9)、甲基异茜草素(10)、槲皮素(11)、木犀草素(12)、柯伊利素-6-C-β-波伊文糖基-7-O-β-吡喃葡萄糖苷(13)、莲子草素(14)、豆甾醇(15)和α-菠甾醇(16)。

acetyl chloride, a novel fluorescence derivatization reagent, has been developed for the determination of sterols and stanol .

采用荧光衍生化试剂2-(9-咔唑)乙酰氯，对天然产物谷甾醇、豆甾醇、菜油甾醇及谷甾烷醇的柱前衍生化条件，包括催化剂的种类、反应温度、衍生化时间等进行了考察，结果表明：催化剂选用三乙胺，反应温度80℃，时间20min，衍生产物具有恒定的最大检测响应值。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。