查询词典 precursor

In addition, as a reservoir for histidine, which is a precursor of histamine, there is an association between carnosine and histamine.

因此，肌肽能否作为神经系统疾病的治疗药物及其具体作用机制的研究成为现近研究的热点。

The precursor object was made from the cobalt nitrate,cerous nitrate,carbamide by the methods of hydro-thermal synthesis.It was calcined at the high temperature and the cobalt-cerous oxide powder was obtained.

以硝酸铈和硝酸钴、尿素等为基本原料，采用水热合成法制备出前驱体，经高温锻烧获得铈钴复合氧化物粉体，经TG-DTA，XRD，SEM等检测手段进行表征。

It was found that these as-prepared MgO materials replicated the biomorph of pinewood, and their frameworks were constructed by plenty of claviform nanoparticles with a similar sectional area, which were different from those of MgO prepared by directly thermal decomposition of MgO precursor.

结果表明，用该方法制备出来的MgO样品具有松木的生物形态，由横截面积比较均一的棒状纳米颗粒构成，不同于乙酸镁直接焙烧得到的MgO样品。

M 8.7 earthquake in Indonesia ; precursor observation ; coseismal anomaly

印尼8.7级强烈地震；前兆观测；同震异常

Tyrosine is a precursor of certain alkaloids, and of various phenolic inhibitors such as coumaric acid.

酪氨酸是特殊生物碱和许多酚类抑制剂的前体物质，如：香豆酸。

Its particle size and distribution were decided by precursor cuprous oxide powder.

铜粉粒径大小和粒径分布取决于前驱体Cu2O粒子的大小和粒径分布。

To enable the fabrication of thermally stable ultralow dielectric constant film, specific precursor materials are used, such as, cyclic siloxanes and organic molecules containing ring structures, for instance, tetramethylcycloterasiloxane and cyclopentene oxide.

为了能够制造热稳定超低介电常数材料，使用特定的前驱物材料，例如环硅氧烷和例如四甲基环四硅氧烷和环戊烯氧化物这样包含环状结构的有机分子。

To enable the fabrication of a thermally stable ultralow dielectric constant film, specific precursor materials are used, such as, silane derivatives, for instance, diethoxymethylsilane and organic molecules, for instance, bicycloheptadiene and cyclopentene oxide.

为了制造热稳定的超低介电常数膜，使用特殊的前体材料，如硅烷衍生物例如二乙氧基甲基硅烷和有机分子例如双环庚二烯和环戊烯氧化物。

The CPF/ZnO nanomaterial, obtained by treating the precursor PF/ZnO at 460 ℃ for 40 min, could fully decolorize and degrade dye MB in 10 min under the natural light compared with 10% degradation of MB on ZnO only under the same reaction condition. The decolorizing efficiency will be still above 80% after 3 cycles.

如在460 ℃下处理40 min所得的纳米复合材料，在自然光条件下，10 min即可使MB溶液完全脱色，而在相同条件下，纯纳米ZnO仅能使MB的脱色率为10%左右；该催化材料重复使用3次仍可使MB溶液的脱色率保持在80%以上。

The method comprises: utilizing arctiin as the precursor compound, and converting arctiin into 4, 4'-dihydroxy enterolactone by intestinal bacteria in an anaerobic condition. 4, 4'-dihydroxy enterolactone is lignin compound, and can be converted into phytoestrogen in human intestinal canals.

本发明是以牛蒡苷为先导化合物，在厌氧条件下，以肠道细菌将牛蒡苷转化为4，4′-二羟基肠内酯。4，4′-二羟基肠内酯为木脂素类化合物，在人的肠道中能被转化为植物雌激素―肠内酯而发挥药理作用。

Molecular Distillation is a kind of high vacuum distillation method, which is suitable for the separation of high boiling, heat sensitivity and viscidity products.

分子蒸馏技术是一种在高真空条件下进行的连续蒸馏过程，适合于分离高沸点、热敏性及具有生物活性的混合物。

They are to the Noughties what yuppies were to the Eighties .

那在六十年代是时髦的，但在八十年代肯定是过时了