白桦醇

And the variation in each population was quite high, which could provide the possibility for selection among and within populations for pulpwood of this species.

白桦天然种群间灰分与苯醇抽出物含量呈显著正相关，综纤维素与聚戊糖含量呈显著正相关。

Results Ten known constituents were isolated and their structures were identified as 23-hydroxyursoIic acid (1), alphitolic acid (2), ursolic acid (3), dihydro-β-cyclopyrethrosin (4), sesamin (5),β-sitosterol (6), clauslactone-K (7), betulinic acid (8), lingueresinol (9), ent-isolariciresinol (10), respectively.

结果：从上述三种植物中共分离鉴定了10个化合物，其分别是：23-羟基熊果酸(1)、alphitolic acid(2)、熊果酸(3)、二氢-B-环除虫菊精(4)、芝麻素(5)、β-谷甾醇(6)、clauslactone-K(7)、白桦脂酸(8)、lingueresinol(9)和ent-isolariciresinol(10)。

In the white part of birch bark there are other medical substances: betulinic acid, b - sitosterol, flavonoids, lupeleol and other.

在白桦树皮还有部分医疗药物：桦木酸、乙-谷甾醇、黄酮类、lupeleol等。

Objective To investigate the effects and mechanism of betulin on rats with alcoholic liver disease.

目的：观察白桦脂醇对大鼠酒精性肝损伤的保护作用及其机制。

Objective To study the antioxidant effects of betulin on alcoholic liver disease in rats.

目的 观察白桦脂醇对大鼠酒精性肝损伤的抗氧化作用。

Betulin has obviously protective effects on alcoholic liver injury in rats.The mechanism may be the induced decrease of lipid peroxide.

白桦脂醇能抑制酒精诱导脂质过氧化反应对肝组织的损伤，对酒精性肝损伤有明显的保护作用。

To harmful microflora white part of birch bark is obliged precisely to betulin.

稳定有害菌群白桦树皮部分恰恰有义务为桦木醇。

Methods Rats were randomly divided into six groups: normal group,alcoholic liver disease model group,betulin low-dose group,betulin middle-dose group,betulin high-dose group and positive control group.

将SD大鼠随机分为6组，正常组和酒精性肝病模型组、白桦脂醇低、中、高剂量组和阳性药物对照组。

The hepatic injuries of rats in the highdose betulin group were recovered obviously.

高剂量白桦脂醇还能明显改善由酒精引起的肝组织脂肪样变和坏死。

These compounds were identified as follows:chrysophanol (FP-1),physcion(FP-2),eriosematin(FP-3),scoparone(FP-4),lupeol(FP-5),betulinic acid(FP-6),3\',4\'-Dihydroxy-trans-cinamic acid octacosyl ester(FP-7),β-sitosterol (FP-8),flemiphilippinone A(FP-9),monopalmitin(FP-10),emodin(FP-11),islandicin (FP-12),salicylic acid(FP-13),p-methoxyphenylpropionic acid(FP-14),trideca-1, 3-diene(FP-15),lupinifolin(FP-16),flemichin D(FP-17),flemiphilippinin A(FP-18), auriculasin(FP-19),erythrinin B(FP-20),6-C-prenylluteolin(FP-21), 8-(1,1-dimethylallyl) genistein(FP-22),flemiphilippinin E(FP-23),flemiphilippinin F (FP-24),5,7,3\',4\'-tetrahydroxy-6,8-diprenylisoflavone(FP-25),flemiphilippinin D (FP-26),dorsmaninsⅠ(FP-27),osajin(FP-28),6,8-diprenyleriodictyol(FP-29), lupinalbin A(FP-30),genistein(FP-31),3\'-O-methylorobol(FP-32),orobol(FP-33), 5,7,2\',3\',4\'-pentahrdroxyflavone(FP-34),the mixture of biochanin A and prunetin (FP-35 and 36),genistin(FP-37),sophororicoside(FP-38),3\'-O-methylorobol-7-glucoside(FP-39),the mixture of sissotrin and prunetin 4\'-O-β-D-glucoside(FP-40 and 41),adenosine(FP-42) and luteoloside(FP-43,mixture).

这些化合物分别为大黄酚(FP-1)、大黄素甲醚(FP-2)、eriosematin(FP-3)、滨蒿内酯(FP-4)、羽扇豆醇(FP-5)、白桦酸(FP-6)、咖啡酸二十八烷酯(FP-7)、β-谷甾醇(FP-8)、蔓性千斤拔酮A(FP-9)、单棕榈酸甘油酯(FP-10)、大黄素(FP-11)、islandicin(FP-12)、水杨酸(FP-13)、对甲氧基苯丙酸(FP-14)、十三烷-1，4-二烯烃(FP-15)、lupinifolin(FP-16)、千斤拔素D(FP-17)、蔓性千斤拔素A(FP-18)、auriculasin(FP-19)、erythrinin B(FP-20)、6-C-异戊烯基木犀草素(FP-21)、8-(1，1-二甲烯丙基)-染料木黄酮(FP-22)、蔓性千斤拔素E(FP-23)、蔓性千斤拔素F(FP-24)、5，7，3′，4′-四羟基-6，8-双异戊烯基异黄酮(FP-25)、蔓性千斤拔素D(FP-26)、dorsmaninsⅠ(FP-27)、osajin(FP-28)、6，8-双异戊烯基圣草素(FP-29)、lupinalbin A(FP-30)、染料木黄酮(FP-31)、3\'-O-甲基香豌豆苷元(FP-32)、奥洛醇(FP-33)、5，7，2′，3′，4′-五羟基黄酮(FP-34)、鹰嘴豆素甲和樱黄素的混合物(FP-35和FP-36)、染料木苷(FP-37)、槐属苷(FP-38)、7-葡萄糖基-3\'-O-甲基香豌豆苷(FP-39)、印度黄檀苷和樱黄素4′-O-β-D-葡萄糖苷的混合物(FP-40和FP-41)、腺嘌呤核苷(FP-42)和木犀草苷(FP-43，混合物)。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。