为...的前驱

Using cobalt chloride and ferromanganese as precursor of cobalt-based catalyst, the performance of the catalyst for hydroformylation of cyclohexene was studied.

以氯化钴和锰铁合金粉为钴基催化体系的前驱体，研究了该催化剂体系对环己烯氢甲酰化反应制备环己烷基甲醛的催化性能；并考察了溶剂、温度、压力等反应条件的影响。

The nano-β-FeOOH for precursor of γ-Fe2O3 was synthesized by microemulsion method, then the β-FeOOH was calcined by mixing with additive polyoxyethylene nonyl phenyl ether (NP-4) in the molar ratio of β-FeOOH/NP-4 as 4, 5 and 100 respectively.

采用微乳法合成出氧化铁的前驱体－纳米β-FeOOH，分别以β-FeOOH与添加剂壬基酚聚氧乙烯醚(NP-4)以物质量的比为4， 5， 100添加NP-4，混合锻烧。

Traditionally MCI-EF has been associated with white-matter hyperintensities thought to increase the risk for vascular dementia. On the other hand, MCI-A, which is widely considered to be a prodrome of Alzheimer's disease, is characterized by smaller hippocampal volume.

传统上，MCI-EF已经被认为与白质高密度有关，且被认为会增加血管失智的风险；另一方面，MCI-A，广泛地被认为是阿兹海默症的前驱症状，其特征为海马回体积较小。

In Chapter 5,the pyrolysis of substituted six-membered ring model compound 4-methyl pyridine has been investigated.Instead of detail theoretical analysis of the reaction mechanism,the general results have been proposed from the products distribution and the combination of the pyrolysis investigation of its analogous pyridine.The major products are H_2,C_2H_2,C_4H_2,C_3H_3N and HCN,here HCN is not a primary initial product at low extent of decomposition.The mole fraction profiles of products have been obtained from the near threshold ionization.The pyrolysis of 4-methyl pyridine is initiated from the methyl abstraction and hydrogen abstraction procedures which are associated with the understanding of the soot formation and the NOX precursor correspondingly.

主要产物为H_2，C_2H_2，C_4H_2，C_3H_3N和HCN，其中HCN为非低温时的热解产物；通过近阈值电离并导出物种随温度变化的摩尔分数曲线，更详细地定量地描述了产物随温度的变化。4-甲基吡啶热解主要从母体脱甲基和脱氢两个初始反应出发，一种趋势是形成大质量数的苯并或杂环的多环化合物，有助于了解炭黑形成过程中的复杂化学过程；另一趋势是开环生成小的碳氢和腈类物质，实验得出的含氮物质的种类及随温度变化有助于了解NO_x的前驱物质的形成及其变化规律。

In this study, we designed and synthesized four glycan-based paclitaxel prodrugs. Compound 1 and 2 are glucose-based prodrugs; and 3 and 4 are glucuronic acid-based ones.

在这篇论文中，我们设计合成了四种分别以葡萄糖和葡萄糖醛酸做为传输载体的前驱药物。

The nano-meter particle of metatitanic acid was prepared by thermohydrolysis method with industrial titanic solution.

摘 要：以廉价的工业TiOSO4溶液为原料，通过热水解法制备纳米二氧化钛的前驱体偏钛酸(H3TiO3)。

The nano-meter particle of metatitanic acid was prepared by thermohydrolysis method with industrial titanic solution.

以廉价的工业TiOSO4溶液为原料，通过热水解法制备纳米二氧化钛的前驱体偏钛酸(H3TiO3)。

Yellow serofluid, brown yellow in color and colloid turbid state in appearance, contained sugars, ethanol, solids, and especially rich alcohol, aldehyde, acids, esters and beneficial microbes. It could be used as precursory substance for the improvement of liquor quality and liquor taste and the synthesis of flavoring substances.

黄浆水为棕黄色、胶体混浊态，含有糖分、酒精、固形物，特别是含有大量的醇、醛、酸、酯及有益微生物菌体，是可用来提高曲酒质量、改善风味、合成香味物质的前驱物质。

Synthesis of MoO3 nanobelt s with no template via a simple hydrothermal method from peroxomolybdic acid sols was reported.

以过氧钼酸溶胶为反应前驱体采用简单的水热方法，在没有任何模板剂的条件下合成三氧化钼纳米带，通过XRD，SEM，TEM和IR等测试方法对产物进行结构表征和形貌分析。

The humic acid was used as the precursors of trihalomethanes, the overall reaction order is second-order.

以腐殖酸为三卤甲烷形成的前驱物质，确定THM 生成的反应级数为二级。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失