查询词典 redox titration

Thus this method could be applied to monitor the process of producing dinitrogen pentoxide by electrochemical oxidation of dinitrogen tetroxide in nitric acid. The results from the two-step titration method of redox titration combined with acidity titration were well consistent with that from the method of redox titration combined with NMR.

氧化还原和酸度两步滴定与氧化还原滴定结合核磁共振光谱法的分析结果表明，两种方法的分析结果吻合良好，精确度良好，两种方法都可用于N_2O_4-N_2O_5-HNO_3体系各组分的全浓度分析。

The results showed that: 1 reinders' redox buffers were used to study the redox properties not only for latent image centers but also for sensitivity centers; 2 The redox potential of Ag2S sensitivity centers was less negative than －220 mV with respect to the saturated calomel electrode in our experiment and the redox potential of latent image centers was between －220 mV and －190 mV; 3 The redox activities of latent image centers were much higher than that of sensitivity centers.

实验结果表明：1Reinders的氧化还原缓冲液的方法，不仅可用于研究潜影中心，也可用于研究敏化中心；2本实验条件下的硫化银敏化中心的氧化还原电位约略负于－220 mV，潜影中心的氧化还原电位值是介于－220 mV与－190 mV之间；3潜影中心的氧化还原活性较敏化中心大得多。

Reactive oxygen species causing DNA oxidative damage comes from two kinds of ways:one is from cellular normal physiological metabolism;the other is from outer environment.Redox-sensitive green fluorescent protein was expressed in Saccharomyces cerevisiae.Recombinant cells were evaluated in monitoring the changes in the redox state of living cells when challenged with toxicologically relevant metal ions NaAsO_2 or Pb(NO_3)_2 by measuring emission intensity at 510 nm with a Hitachi F6500 fluorescence spectrophotometer,roGFP expressed in yeast responded not only to typical membrane-permeant oxidants H_2O_2 and reductants DTT,but also to toxicological metal ion-induced intracellular redox changes in a dose-dependent manner.Moreover,exposure of yeast cells to NaAsO_2 or Pb(NO_3)_2 at concentrations that induced redox changes reported by roGFP caused up to 2～3 fold increases in DNA mutation frequency.This mutagenic effect was largely caused by oxidative stress since blocking the production of hydryl radicals with thiourea significantly reduced the mutation rate as well as delayed the cell death.

本文将对氧化还原状态变化敏感的绿色荧光蛋白roGFP1-R12，在酵母细胞中实现了多拷贝强表达；荧光扫描经强氧化剂H_2O_2和还原剂DTT以及环境中重金属NaAsO_2或Pb(NO_3)_2处理后的酵母细胞悬液，测定510 nm处的荧光发射强度结果显示，表达的绿色荧光蛋白对氧化还原水平敏感，且在510 nm处的荧光强度与一定的重金属浓度呈正相关，即roGFP1-R12在510nm处的荧光发射值随重金属浓度的增高而增强，从而说明重金属对细胞的毒性在一定程度上很可能是通过破坏细胞内的氧化还原平衡发生作用；同时通过该绿色荧光蛋白对胞内氧化还原状态变化的响应情况可以来实时检测环境中的重金属；遗传学的点突变频率及致死率实验数据表明，重金属能导致菌体的点突变频率和致死率升高，且活性氧的清除剂巯基脲能明显降低这种点突变和致死率，说明由重金属引发的这种点突变和致死效应在很大程度上是依赖于重金属对细胞诱导产生的氧化胁迫。

Take for the amount of test materials, precision that set, place beaker, unless otherwise specified, may be added 40ml of water and hydrochloric acid solution (1-2) 15ml, and then set on a magnetic stirrer, stirring allows the dissolved, together with potassium bromide 2g insert platinum - platinum electrode, it will insert the solution of the following buret tip is about 2 / 3, using sodium nitrite titration solution (0.1mol / L, or 0.05mol / L) rapid titration, side drops while stirring, to near point, Burette tip surface will be presented with a small amount of water leaching cutting-edge, lotion, and solution and continue titration slowly until the sudden deflection of galvanometer pointer, namely, titration end point.

取供试品适量，精密称定，放置烧杯中，除另有规定外，可加水40ml与盐酸溶液（1-2）15ml，而后置电磁搅拌器上，搅拌使溶解，再加溴化钾2g，插入铂-铂电极后，将滴定管的尖端插入溶液下面约2/3处，用亚硝酸钠滴定液（0.1mol/L或0.05mol/L）迅速滴定，边滴边搅拌，至近点时，将滴定管的尖端提出液面，用少量水淋洗尖端，洗液并溶液中，继续缓缓滴定，至电流计指针突然偏转，即为滴定终点。

The titrant is a mixture of EDTA and sodium fluoride, both mercury film electrode and fluorinion selective electrode are inserted in the titration solution. In a process of titration, both the added volume of titrant and the concentration of mercury ion at each titration point can be obtained simultaneously from the potentials of two electrodes, and then the concentration of each component in the alloy can be obtained from the titration curves by multivariate calibration.

用ED-TA与氟化钠的混合溶液作为滴定剂，被滴定液中同时插入了汞膜电极和氟离子选择电极，在滴定过程中的任一滴定点，溶液中汞离子的浓度和滴定剂的加入体积可由两个电极的电位测定值同时获得，从而可应用多元校正法由相应的滴定曲线求得混合金属中每一种组分的含量。

Sodium polysulfide/bromide redox flow battery and vanadium ion redox flow battery were the leading ones in redox flow batteries.

氧化还原液流电池是近年来研究的一个热点。

Use AgNO3 titration testing,acid and alkali titration, automatic electrical potential titration respectively to detect the dialdehyde content.

通过四种醛基检测方法的比较，AgNO3滴定法是测定醛基含量最适宜的，从分析手段来讲，也是简便易行成本较低的。

The point of zero net charge for the meadow brown soil in northeast of China with structural negative charges was measured by three methods: potentiometric titration, mass titration and inert electrolyte titration, showing that for the meadow brown soil which possesses structural negative charges, a PZNC independent of electrolyte concentration exists, and the values of pHPZNC obtained by the above three methods are 2.9, 5.0 and 3.3, respectively.

分别采用电势滴定法，质量滴定法和惰性电解质滴定法测定了荷结构负电荷的东北草甸棕壤的零净电荷点，研究表明荷结构负电荷的土壤依然存在与电解质浓度无关的零净电荷点，三种方法的实验结果分别为2.9， 5.0和3.3。

The either titrate in titration process is nodded, the affiliation of the chroma of the Ag+ in solution and titration agent bulk can determine by the potential of two electrode the value is obtained at the same time, thereby applicable is multivariate and corrective the content that the law gets ion of the avery kind of in mixing haloid ion by corresponding titration curve.

在滴定过程中的任一滴定点，溶液中Ag+的浓度和滴定剂的加入体积可由两个电极的电位测定值同时获得，从而可应用多元校正法由相应的滴定曲线求得混合卤素离子中每一种离子的含量。

Among the analysis methods, back-titration with Ca 〓 was adopted other than direct-titration or back-titration with NaOH. Because Ca 〓 method is carried out in acidic condition, in which the hydrolysis of ester-linkages could be neglected.

该法的分析测定是在酸性条件下进行的，多羧酸纤维素酯在酸性条件下基本不水解，可以忽略酯键存在对测定结果的影响。

It is like a mustard seed, which a man took and planted in his garden.

好像一粒芥菜种，有人拿去种在园子里，长大成树，天上的飞鸟宿在他的枝上。

The increase in narcissism was stronger for women than for men in both datasets.

在自我陶醉的增加是更有力的比这两个数据集男性。