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Anthraquinone is prepared by the liquid phase oxidation of anthracene with oxygen in the presence of cobaltous salt,manganous salt and bromide.

在液相中,钴盐、锰盐、溴化物催化氧气氧化蒽制取蒽醌,当压力为0.5~0.8 MPa,溶剂是芳香性卤代烃和丁酸的混合物(其中丁酸质量分数为15%~20%)时,蒽醌的产率可达90%,纯度99.2%。

The essential oil was obtained from the fresh aerial parts of coriander Coriandrum sativum L .

采用气相色谱/质谱联机对水蒸汽蒸馏得到的黑龙江产芫荽茎叶精油的芳香成分进行了分析。

The main compnents were cuminal and safranal (accounting for 32.26% and 24.46% respectively inthe components identified).

另有9种含量在1%以上的物质,主要是萜类中的单萜、倍半萜和芳香族醛、酮醚类物质。

The major anthocyanin s in purple sweet potato are cyanidin and peonidin acylated with aromatic acid.

其花色苷的主要类型为芳香酸酰化的矢车菊素和芍药素。

Polybutylene terephthalate is a new type of polyester textile chemical fiber industry, it is a kind of aromatic polyester fiber after condensation reactions by 1,3 propylene glycol and benzane dicarbonic acid.

聚对苯二甲酸丙二醇酯是纺织工业中的一种新型聚酯化学纤维,是由1,3-丙二醇和对苯二甲酸经过缩聚反应形成的芳香族聚酯纤维。

It's found that the aromatic dinitro compounds can be monoreduced to nitroanilines in high selectivity, aromatic nitro compound s and muti.

本文旨在探索一种具有先进性和创造性的催化方法,利用一氧化碳在温和的条件下高选择性地还原芳香硝基化合物制备芳胺。

It's found that the aromatic dinitro compounds can be monoreduced to nitroanilines in high selectivity, aromatic nitro compounds and muti-cycle aromatic nitro compounds can be quantitively reduced to the corresponding amine by selenium catalyst with CO/H2O in polar aprotic solvents under atmospheric pressure using medical inorganic bases as co-catalysts.

在实验的基础上提出了对硒催化CO/H_2O还原芳香硝基化合物机理的一些粗浅认识。

Based on the study of the adsorption mechnism between the macroporous weak base anion-exchange resins and the aromatic sulfonic acid, a pretreatment method for the wastewater from 4, 4'-diaminostilibene-2, 2'-disulfonic acid manufacturing process, a refractory dye intermediate wastewater, was developed.

在对芳香磺酸化合物吸附机理研究的基础上,开发了大孔弱碱性阴离子交换树脂吸附法处理4,4'-二氨基二苯乙烯-2,2'-二磺酸氧化工序生产废水的新技术,并得到了工业化应用。

The adsorption properties of 2-naphthalenesulfonic acid, p-tuluenesulfonic acid, p-chlorobenesulfonic acid and 4, 4'-dinitrostilibene-2, 2'-disulfonic acid onto the macroporous weak base anion-exchange resins were investigated. The influence of pH, salt and temperature on the adsorption equilibrium was also studied.

本论文以芳香磺酸化合物为研究对象,系统地研究了大孔弱碱性阴离子交换树脂对其的吸附行为,考察了温度、pH值、盐含量等因素对树脂吸附性能的影响。

These session bitters are not as strong and hoppy as an India Pale Ale would be in the USA although IPAs with modest gravities (below 1040o) have been brewed in Britain since at least the 1920s.

这些普通苦啤酒不像美国的印第安淡色啤酒有浓郁的酒花芳香,尽管在适度比重(1040o以下)便自20世纪20年代在英国酿造。

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On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面,更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值,分为几个相等的区间作为横轴,并将各区间内所测定值依所出现的次数累积而成的面积,用柱子排起来的图形,也叫做柱状图。

You rap, you know we are not so good at rapping, huh?

你唱吧,你也知道我们并不那么擅长说唱,对吧?