查询词典 anion

The electrolyte buffer for the anion separation consisted of 40 mmol/L boric acid -1.8 mmol/L potassium dichromate -2 mmol/L sodium tetraborate (pH 8.6), and tetramethyl ammonium hydroxide was used as electro-osmotic flow modifier.

阴离子测定采用的缓冲体系为40mmol/L硼酸-1.8mmol/L重铬酸钾-2mmol/L硼酸钠(pH8.6)，氢氧化四甲铵为电渗流改性剂，5种阴离子在4.6min内达到基线分离，检出限为0.10~1.85mg/L。

Anion can purify air, maintain clean shoes clean integration;The product is intended for women from specially-made boots.

负离子能净化空气，保持鞋内干净清洁于一体；本产品专为女性靴用特制而成。

The ammonium groups on the surface of the stationary phase generate an electroosmatic flow from cathode to anode, and serve as a strong anion-exchange stationary phase at the same time.

由于这种整体柱带有正电荷，避免了碱性化合物与固定相之间的静电吸引作用，从而避免碱性化合物的峰拖尾或不出峰等现象。

The crystal structure analyses of 5-7 reveal that the position of the substitutive second metal in the Keggin anion plays an important role in the structures of the compounds.

其中，5、6和7的单晶结构分析表明Keggin型杂多酸阴离子上单取代的位置对化合物的结构有着较大的影响。

Two special structural features of the sulfonium salt were proved to stabilize its corresponding ylide and depress the 2,3-sigma rearrangement. One is that there is a trimethylsilyl in the end of the allylic double band. This silicon atom can stabilize a α-carbon anion and the corresponding ylide. Another is that there is hydroxy group in the beta-position of sulfonium atom. The oxygen of this hydroxy group may stabilize the sulfonium cation.

为了稳定生成的烯丙基硫叶立德，并抑制它的2， 3-sigma 重排反应，在硫叶立德结构上做了两方面的考虑：一是在烯丙基双键的未端引入硅基，利用硅原子对 a -碳负离子的稳定作用来稳定烯丙基硫叶立德；二是在硫原子的 b -位引入羟基，利用羟基氧对硫正离子的作用来稳定硫叶立德。

Methods:Alkaline dimethyl sulfoxide system was established for producing superoxide anion.

在各种病理因子作用下，机体产生大量自由基依然是造成脑缺血再灌注损伤的重要途径。

Objective: To establish a new method for quantitative detection of inorganic anion in water including fluoride, chlorite, bromate, chloride, nitrite, bromide, sulfuret, chlorate, sulfite, nitrate, phosphate, sulfate. Methods: Ion chromatography was applied.

目的：建立能同时测定生活饮用水中F、ClO2、BrO3、Cl、NO2、Br、S(上标 2-)、ClO3、SO(上标 2-下标 3)、NO3、PO(上标 3-下标 4)、SO(上标 2-下标 4)等12种无机阴离子的方法。

Among the dose studied, the damage of peroxynitrite induced is more serious than that of superoxide anion radicals.

在研究的剂量范围内，过氧亚硝基阴离子的这种毒性作用明显大于超氧阴离子自由基。

Fig. 56. Superoxide anion scavenging effect of compounds…………………….76

图56。化合物的超氧自由基捕捉能力

The mechanism of the reaction was studiedin detail,in which excited state avaliable to carryout the excited state intramolecular proton transferreaction was recognized.The INDO/S-CI semiempiricalMO method was used to calculate transition energiesand oscillator strength,and assign spectra theore-tically,the calculated spectra values were basicallyconsistent with the experimental values.Themolecular orbital properties for the adjacent HOMO-LUMO of various kinds of conformersand anion species,thetransition properties and symmetry for thetransition from ground state to lower excited stateswere analysed,especially,no much study on theanion species all of the world.

位能曲线的求法满足反应坐标是反应过程中能量最小途径的定义，较详细地研究了各类反应的质子转移历程，认定在哪个激发态有利于发生激发态分子内质子转移反应，用INDO/S-CI半经验MO方法进行跃迁能和振子强度计算及光谱的理论指认，计算的光谱值和实验值基本吻合，并分析了各种异构体和阴离子的HOMO-LUMO附近的轨道性质，各跃迁态的跃迁性质和对称性，尤其是对阴离子的研究国内外尚不多见。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷