羟基

The gas chromatography has extremely high sensibility to identify H_2, so it is a method to detect siderite which contains micro clays and impurity minerals with OH groups, vice versa.

由于气相色谱对H_2的检出灵敏度特高，可作为对菱铁矿中含有羟基结构的微量粘土及其矿物杂质的检测方法，反之亦然。

The mineralization of gold and silver is zoned and closely related to silicification of carbonate and clastic rocks, so siliceous ore dominates in the deposit.

矿化温度主要在300～170 C之间，成矿流体的主要成分为K~-、Na~-、Ca~(2+)、Mg~(2+)、Cl~。金属配合物的分配计算显示，金在成矿热液中主要以疏氢配合物迁移，而银、铁、铅、锌则以氯配合物为主，铁、铅、锌在成矿后期的中性-弱碱性环境下可转变为羟基和硫氢配合物。

In addition, the in vitro bioactivity of the glasses was tested by immersion in simul...

浸泡三天后所有样品表面都被羟基磷灰石覆盖，表明了样品具有良好的生物活性。

Objective:The present study investigated the inhibitory effects of Chinese herb component sinapine on activity of acetylcholinesterasein cerebral homogenate and blood serum of rats.

中文摘要：目的：考察中药单体芥子碱(3，5-二甲基，4-羟基苯丙烯酰胆碱，sinapine)对大鼠血清和大鼠大脑匀浆乙酰胆碱酯酶(acetylcholinesterase，AChE)的体外抑制作用。

Connecting with the character of ESR spectra at 77K andcalculated LUMOs, HOMOs the linear relationship between spin transfer efficiencyand molar ratios of nucleotide in DNA to sinapic acid or sinapine provides quantitativeevidence of long range electron transfer within mixed aggregates.

将低温获取的电子自旋共振波谱与DNA组分及羟基肉桂酸衍生物的前线轨道能量相关联，依据自旋自DNA向芥子酸及其衍生物的转移效率与核苷酸和后者摩尔比的线性关系揭示混合堆集物中电荷长程传递的证据。

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)。

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)。

RESULTS: Four constituents were elucidated as β-sitosterol, eriantic acid B, 2α, 3α, 24-trihydroxyurs-12-en-28-oic acid and daucosterol.

结果：分得4个化合物，分别鉴定为β-谷甾醇，毛花猕猴桃酸B，2α，3α，24-三羟基-12-烯-28-乌苏酸和胡萝卜苷。

The mechanisms of ethylenediamine and 8-hydroxyquinoline activating smithsonite are researched by measuring adsorption amount ,concentration of Zn2+ ion and infrared spectrum.

通过吸附量的测定、Zn2+离子浓度测定和红外光谱测定分别对乙二胺和8-羟基喹啉活化菱锌矿的机理进行了研究。

Various chrome complex dyes(1:1 ratio) of mordant black 1,mordant black 7,mordant black 9 and mordant black 11 have been synthesized and sodium dichromate is been used as mordant agents instead of Cr3+ to oxidate dyes sufficiently.

还设计合成了媒介黑1、媒介黑7、媒介黑9和媒介黑11的高水溶性1∶1络合染料，重铬酸钠作为铬化试剂，染料得到了充分的氧化，无色配体多羟基羧基酸的引入使染料有很好的水溶性，该实验路线未见报道。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。