化合物

Acidic ion-acidic resin can also be used as a catalyst for organic synthesis, it's used instead of concentrated sulfuric acid can be catalyzed synthesis of dihydro-coumarin compounds [1], High purity isopropenyl acetate [2] and other organic compounds.

酸性离子酸性树脂也可作为一种有机合成催化剂，用它替代浓硫酸可催化合成二氢香豆素类化合物[1]，乙酸异丙烯酯[2]等有机化合物。

The results showed that the flavonoid chemicals of resistance to pests mainly including rutin, isoquercitrin and quercetin could be detected and quantitatively analyzed by HPLC.

结果表明，棉花组织中主要抗虫黄酮类化合物(包括异槲皮苷、芸香苷和槲皮素等)能够用HPLC方法检测并进行定量；异槲皮苷、芸香苷和槲皮素的含量均以花瓣中最高，花萼、苞叶和棉铃中较少；棉花生长中后期顶端嫩叶中抗虫黄酮类化合物的含量明显高于苗期。

Two isoxazole intermediates containing 1,2,3triazolyl and carbonyl ,which can also be used as intermediates for synthesis of new heterocyclic compounds,have been synthesized.

以2-苯基-1，2，3-三唑-4-甲醛为原料，合成2种在异噁唑环上同时含有1，2，3-三唑基和羰基的新型化合物，它们可作为合成其他杂环化合物的中间体，其分子结构经IR，1HMR，MS谱确证

Three series of donor-acceptorπ-conjugated molecules 1, 2, and 3 have been designed and synthesized with a N, N-dimethylamino, Julolidine group (2,3,6,7-tetrahydro-1H, 5H-pyrido[3, 2, 1-ij]quinolinyl), or N, N-diphenylamino group as the donor moiety, a phenylvinyl or thienylvinyl unit as the bridge, and a bromide or aldehyde group as the acceptor moiety.

本文设计并合成了1、2、3三个系列的D-π-A型化合物(Donor-Acceptorπ-conjugated compounds)，在化合物分子中引入久洛尼啶基团(2，3，6，7-tetrahydro-1H，5H-pyrido-[3，2，1-ij]quinolinyl)，N，N-二甲基氨基，或N，N-二苯基氨基为供电子基团，以苯乙烯基或噻吩乙烯基为桥链，以溴原子或醛基为吸电子基团。

For flavonoides, which consist of more than forty glycosides, quercetin, kaempferol and isohamnetin are the main elements.

银杏叶中主要活性物质有两类：黄酮类化合物及萜内酯化合物。

The condensation reaction of levulinates with ethylene glycol brings about corresponding ketal , with respective productivity of 74%, 75% and 75%, and respective structure being verified by IRS.

由乙酰丙酸酯类化合物与乙二醇进行缩合反应，得到相应的环状缩酮化合物，产率分别为 74 %，75 %和 75 ，其结构为红外光谱所证

When you start up on a very low carbohydrate diet such as Atkins or a Ketogenic diet you enter into what is referred to as ketosis where your body switches from running on carbohydrates as fuel to using a source called ketones.

当你开始每天食用低碳水化合物的食品例如减肥专家或者生酮膳食，也就和糖尿病酮症患者的饮食差不多了，即本来以碳水化合物为身体主要能量变成依赖酮体作为身体能量。

When you start up on a very low carbohydrate diet such as Atkins or a Ketogenic diet, you enter into what is referred to as ketosis, where your body switches from running on carbohydrates as fuel to using a source called ketones.

当你开始每天食用低碳水化合物的食品例如减肥专家或者生酮膳食，也就和糖尿病酮症患者的饮食差不多了，即本来以碳水化合物为身体主要能量变成依靠酮体作为身体能量。

It is shown that the of the porous carbon towards (I_2) depends on the pore volume of the porous carbon; the adsorption of the porous carbon towards phenolic compounds depends on the density of carboxylic and lactonic groups on the surface of the porous carbon; the adsorption of the porous carbon towards Cr d...

发现多孔炭对酚类化合物及Cr的吸附以化学吸附为主，其中对酚类化合物的吸附由羧基与内酯基的表面密度合量决定，对Cr的吸附由表面官能团中羧基和内脂基含量的合量决定；多孔炭对I2的吸附以物理吸附为主，由孔容决定。

On the basis of molecular design and assembly, the polyoxometalate compounds supported by Keggin, Dawson, lacunary Keggin, and Silverton-type etc. polyanions on the basis of well-known and novel polyanions as building blocks were successfully synthesized by the hydrothermal technique, which are"decorated"or"bridged"by organic N-donor and/or O-donor ligands. The study on synthetic conditions and rules for these hybrid compounds and characterization by X-ray crystallography, spectroscopic, thermal, electrochemical and magnetic properties are carried out.

本文主要利用水热合成方法，从分子设计及组装的思想出发，借助不同N和含O的有机配体对多金属氧酸盐阴离子结构进行&修饰&或&桥连&，合成了一些以饱和Keggin结构、饱和Dawson结构、缺位Keggin结构和Silverton结构等阴离子为构筑模块的多金属氧酸盐化合物，研究了这些化合物的合成条件及规律并对它们的晶体结构、谱学性质、热性质以及磁性质进行了研究。

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。