The hydroxyl ion has a negative charge.
氢氧根离子有一个负电荷。
The hydroxyl ion has a negative charge .
氢氧根离子有一个负电荷。
The hydroxyl radicals could be trapped by PBN in aqueous solution.
在水溶剂中用PBN自旋捕捉到了羟基自由基。
Astronomers have found the hydroxyl radical in the Venusian atmosphere.
天文学家已经发现在金星大气中存在羟基。
Another end for the hydroxyl and the carboxyl group, has the water affinity.
另一端为羟基和羧基，具有亲水性。
The hydroxyl groups can be changed into esters, ethers, acetals and ketals, etc.
最常用的羟基保护基可归纳为三类：酯类、醚类和缩醛或缩酮类。
The foam was prepared through a reaction of the hydroxyl groups with diisocyanate.
聚胺酯泡沫通过多羟基化合物上的羟基和二异氰酸酯反应形成。
Any acid that has hydroxyl groups in addition to the hydroxyl group in the acid itself.
任何含有除自身的羟基外其他羟基的酸。
Methylol groups react with the hydroxyl groups of the cellulose to form stable ether linkage.
甲氧基基团可以和纤维素上的羟基反应形成稳定的醚键。
Straight chain alcohols range from 10 to 33 with the hydroxyl group at every theoretically possible positions.
此外还检出了一整套直链一元仲醇同系物，其碳数从10至33，而羟基可在任何理论上可能的碳位上。
An anhydride formed by the removal of a water molecule from the hydroxyl and carboxyl radicals of hydroxy acids.
一类弱酸性有机合成物，分子中含有一个或更多羟基。
The hydroxyl groups of epoxy acrylate (AAEP) in VER were sealed with different methods in order to obtain modified VER.
采用不同的方法对乙烯基酯树脂(ver)中环氧丙烯酸酯(AAEP)进行羟基封闭，制备改性ver。
There are close connection between the hydroxyl radical scavenging activity and flavonoids content or polyphenols content.
提取物中总黄酮和多酚类物质的含量与清除羟自由基能力有密切关系。
In order to make the wool fabric obtain better smooth feel, the hydroxyl silicone oil was carried out to finish wool fabric.
为了使羊毛织物获得较好的平滑手感，采用羟基硅油平滑剂对羊毛织物进行平滑整理并对整理工艺进行了探讨。
The hydroxyl and other reductive groups present in wood powder and cane sugar lower remarkably the thermostability of the system;
木粉和蔗糖中存在的羟基等还原性基团显著降低了体系的热稳定性；
The effect of selenonic protein were studied on the hydroxyl radical scavenging with ESR, compared with SOD and polyhends of tea.
用ESR技术研究含硒蛋白抗羟基自由基作用的活性。
It may be that there is not the hydroxyl group and can not form intermolecular hydrogen bond with MB-Hb system in the cyclohexane.
这也许是因为其不含有而不能与体系形成分子间氢键所导致的。
The hydroxyl radical was the main active species that promote the organic degradation by studying the mechanism of 4-CP degradation.
对有机物的降解机理分析表明，羟基自由基是促使有机物降解的主要活性物质。
Experimental results show that oxygen in the water comes from the adsorbed oxygen and hydrogen from the methyl and the hydroxyl in methanol.
水中的氧来源于吸附态氧，氢来源于甲醇中的甲基氢和羟基氢且以甲基氢居多。
The hydroxyl amino acid has been replaced, the resulting compounds can also be regarded as ammonia hydrogen has been replaced by acyl derivatives.
羧酸中的羟基被氨基取代后，生成的化合物，也可看作是氨的氢被酰基取代的衍生物。
The results showed that hydroxyl groups of H3BO3 reacted with the hydroxyl groups of fir powder, and thus the crystalline phase of cellulose was destroyed.
研究表明，H3BO3与杉木粉中的羟基发生了缩合反应，纤维素的结晶被破坏；
The FTIR spectrum indicated that hydrogen bonds were formed between the carbonyl group in tartaric acid and the hydroxyl group in inner surface of kaolinite.
红外光谱表明：酒石酸分子的羰基与高岭石的内表面羟基形成了氢键，而羟基与高岭石的硅氧面的氧形成了氢键。
NMR techniques were used to investigate the stereo configuration and conformation of the hydroxyl mesocyclic diamines and their derivatives in aqueous solution.
利用二维核磁共振技术对一类新的含羟基中环二胺及其衍生物在水溶液中的构型和构象进行了较为详尽的研究。
On a molecular level, D-tagatose is structurally identical to D-fructose, except for an inversion of the hydroxyl and hydrogen groups at the fourth carbon atom.
塔格糖是果糖的“差向异构体”，在分子水平上，除了第四个碳原子上的羟基和氢基团倒置外，D -塔格糖与D -果糖的结构是一样的。
At last, using the hydroxyl radical system, superoxide radical system, the antioxidation activities of crocetin and crocetin dimethyl ester were studied and compared with BHT.
采用羟基自由基体系和超氧阴离子自由基体系对藏红花酸及藏红花酸二甲酯的体外抗氧化活性进行研究，并与BHT进行比较。
There could be a coordination bond between the silver atom and the hydroxyl group of tannic acid, which stabilize the Ag nanoparticles in the spatial reticulate structure of tannic acid.
纳米银颗粒与羟基发生电荷吸附作用，固定在鞣酸的空间网状结构中，稳定存在。
It was found that the composite films on the hydroxyl-terminated silicon substrate showed better tribological properties as compared to potassium stearate films under relative lower load.
结果表明，在相对较低的载荷下，复合薄膜比硬脂酸钾薄膜具有更好的摩擦学性能。
The amino groups or the hydroxyl groups on the chitosan-supported metal tetraphenylporphyrins may play a key role in improving the stability and the catalytic activity of metalloporphyrins.
在壳聚糖四苯基金属卟啉中，氨基或羟基可能对金属卟啉的稳定性和催化活性起重要作用。
The FTIR result verified that the hydroxyl groups on the surface of the resulting nano-SiO2 form hydrogen bondings with adipic acid generated by hydrolysis of dimethyl adipate during reaction.
红外光谱表明二氧化硅表面硅羟基与己二酸二甲酯酯化产物己二酸的羧基形成氢键。
The liquefied water production rate of the vitrain and fusain would be approximately equal and due to the partial reason, the hydroxyl strength of the vitrain and fusain would be approximately same.
镜煤和丝炭的液化水产率非常接近，其部分原因归因于二者所含的羟基强度近似相等。
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