谷

Keywords β-sitosterol;β-sitosterol derivative;synthesis;structure characterization

谷甾醇；β-谷甾醇衍生物；合成；结构表征

Results Seven known compounds: ocotillol (1), ursolic acid (2), betulin (3), lupeol (4), 1β-hydroxy-lupeol (5),β-sitosterol (6) and sitosterol-4-en-3-one (7) were isolated.

结果 分离得到7个化合物，分别鉴定为：20S，24R-环氧达玛烷－3β，25-二醇(ocotillol， 1)、熊果酸(2)、白桦脂醇(3)、羽扇豆醇(4)、1β-羟基羽扇豆醇(5)、β-谷甾醇(6)、谷甾－4-烯－3-酮(7)。

Objective To compare the expression and its significance of glutathione peroxidase and glutathione-S-transferase in hepatic tissue in oral drinking arsenic exposed mice.Methods 60 mice were divided into control group,sodium arsenite group and sodium arsenate group at random.

目的 比较不同价态的砷对小鼠脐组织中谷胱甘肽过氧化物酶和胎盘型谷胱甘肽-S-转移酶表达的影响，探讨氧化应激在慢性砷暴露致肝损伤中的作用。

Immobilized metal-chelated affinity chromatography column sorbents matched with Zn2+ were prepared for purifying glutathione using chitosan spherule as substrate.

以谷胱甘肽的酵母抽提液为原料，用自制的以壳聚糖小球为载体、Zn2+为配基的金属螯合亲和层析柱分离纯化谷胱甘肽。

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。

Furthermore, there existed one cold event within 5a substage and two cold events in the substage 5e, remarkably indicating that the climatic variations in the interglacial period were rather unstable.

另外，5a亚段由双峰-谷组成，而5e由三峰两谷构成，显示了气候的不稳定性。末次冰期内气候也至少存在有7次明显的暖波动及5次冷事件。

By 2014, though, the Chinese market could well have grown to $15bn-$20bn a year, and Google could have expected – before this week's announcement – to earn $5bn-$6bn of that, according to Marianne Wolk, an analyst at Susquehanna Financial Group.

但是，Susquehanna金融集团的分析师玛丽安·沃尔克表示，到2014年，中国市场规模很可能增长到150亿至200亿美元，人们原本可以预计——在谷歌本周宣布决定之前——谷歌将可获得其中的 50亿至60亿美元。

Even if China does not take any more swingeing action against the company, Google's previous experience of running a search service from outside the country's "Great Firewall" is not encouraging.

即使中国不再对谷歌采取任何激烈举措，谷歌以往在中国"防火长城"之外运营搜索服务的经历也无法令人感到振奋。

Google's headquarters, in Mountain View, California-the Googleplex-is the Internet's high church, and the religion practiced inside its walls is Taylorism.

谷歌的总部在加州山景城，谷歌村是英特尔的高教堂，教堂内的宗教实行的就是泰勒主义。

Following a path that would become a key tenet of the Google way, they bought a terabyte of disks at bargain prices and built their own computer housings in Larry's dorm room, which became Google's first data center.

下面的路径，将成为一个关键的宗旨的谷歌的方式，他们买了1TB的磁盘上的议价产品，建立自己的计算机外壳在拉里的宿舍里，成为谷歌的第一个数据中心。

She gently rebuff ed him, but agreed that they could be friends

她婉言拒绝了，但同意作为朋友相处。

If in the penal farm, you were sure to be criticized.

要是在劳改农场，你等着挨绳子吧！