质子化

DNA纤维质子化及脱嘧啶的拉曼光谱研究

Raman Spectral Study of Protonation and Depyrimidination in the Herring Sperm DNA Fiber

磷酸三甲（丁）酯质子化的~（31）P和~1HNMR研究

~ ( 31 ) P and 1H NMR Study of the Protonation of Trimethyl and Tributyl Phosphates

我们推测脓青素通过质子化作用，影响了细胞色素b－559的光氧化还原反应。

We assumed that pyocyanine affected the light-induced redoxreaction of cytochrome b-559 by affecting the protonation of the cytochrome .

甲苯羰基化的~（13）CNMR研究Ⅰ甲苯的质子化

~ ( 13 ) C - NMR STUDIES OF THE CARBONATION OF TOLUENE ⅰ . Protonation of Toluene

并用激光Raman和UV/Vis光谱观测质子化作用。

The action of protonation are studied by the Raman and UV / Vis spectra .

在碱性环境中pH升高到10之后，蛋白构象的改变引起色基构象发生一定程度的变化，在此过程中可能还涉及色基的去质子化过程。

In basic solution with pH higher than 10 , there were conformational changes as well as deprotonation process of the chromophore .

H＋转化为表面正电荷是由于土壤表面FeOH、AlOH的质子化造成的。

The transformation into positive charges arises mainly from protonation of Fe OH and Al OH functional groups on the surface of soils .

本文对FAB质子化机理进行了探讨。

A proposal mechanism of protonation under FAB was discussed .

当进水pH值小于7时，复合膜表面的氨基和亚氨基会被质子化，膜表面带正电荷。

When feed pH was less than 7 , the amines and imines of PANI were protonated and PANI / PS membrane surface had positive charge .

XPS检测和表面能的测试结果都证明了质子化的交替薄膜使极性增强。

The result of XPS and surface energy test showed that the protonated bipolar films had more polar .

酸性过强的土壤容易使EDTA发生质子化，从而降低其萃取能力；

The strong acidic soils would cause the protonation of EDTA and weaken its extracting ability .

这种现象主要是由于在低pH值下，纳米粒中药物阿霉素的氨基质子化，与羧基的结合能力减弱，从而促进了阿霉素的释放。

This phenomenon is mainly due to the amino group protona-tion at low pH , causing the carboxyl binding capacity decreased , thus promoting the release of doxorubicin .

结果表明，FAB质子化机理与CI是不同的。

It was shown that the mechanism of protonation under FAB was quite different from that under CI .

但过低的pH值易引起海藻酸钙的质子化现象，而且可造成被包埋的BSA酸解。

However , when pH value was too low , it would easily cause the protonation of calcium alginate and acid hydrolysis of BSA .

Ce（Ⅳ）Y吸附剂的强B酸中心均引起噻吩和环己烯吸附方式的变化，生成相应的质子化产物，对甲苯的吸附方式无影响。

The strong Bronsted acid sites of Ce ( IV ) Y lead to the protonation of thiophene and CHE , but have no effect on the adsorption mode of toluene .

FT-IR光谱和Raman光谱证实经过质子化处理后，PPDMAB分子链上芳香吡咯环明显减少，而氧化结构吡咯环明显增加。

We can draw the conclusion that the aromatic pyrrole rings turn into oxided pyrrole rings after protonated from FT IR spectra and Raman spectra .

质子化NH基团和溶剂及阴离子之间存在多重氢键相互作用，这进一步稳定了此结构。

Multiple hydrogen bonds were observed between the protonated NH groups and the solvates / anions , which further stabilize this structure .

化合物1是由多金属氧酸盐[PMoVI12O40（VIVO）]-组成，含有1个质子化的H3O+和13个晶格H2O分子。

The structure of 1 consists of polyoxometalate [ PMoVI12O40 ( VIVO ) ] - , a proton hydrate H3O + and thirteen lattice water molecular .

P0和P1在碱性滴定中，可能经历了去质子化并由胶束内层至表面的转移；

The porphyrins undergo the deprotonation of the pyrrole in the basic titration process , and transfer from the inner part to the surface layer .

发现2-（2-吡啶基）咪唑化合物存在分子内光诱导电子转移反应（PET），并且这一过程强烈地依赖于溶液的pH值，但是氮原子的质子化会影响PET过程。

It was found that the intramolecular photoinduced electron transfer ( PET ) took place in the solution and the process strongly depended on the acidity of the solution and was affected by the protonation of nitrogen atoms .

发现了在不同pH介质中喹诺酮类药物的荧光波长和荧光强度的变化规律，并对喹诺酮类药物质子化作用及互变异构现象与荧光性质的相关性进行了考察。

Rules of wavelength and intensity of the fluorescence in different pH medium were discovered . The correlation between the protonation , tautomerism and luminescence characteristics of quinolone are studied . It is found that in pH 6-8 or 2-4 there are two luminescence species .

研究了环丙沙星（ciprofloxacin，CIP）在不同pH条件下的荧光光谱、紫外吸收光谱和质子化作用，测量了CIP在中性条件下的荧光量子产率。

Fluorescence spectra , ultraviolet absorption spectra , and protonation of Ciprofloxacin ( CIP ) at different pH values have been studied . Fluorescence quantum yield of CIP under neutral condition has been measured .

因酸性定影液中存在大量NH4~+，要与甲醛反应生成质子及质子化的六次甲基四胺，使试液酸度增大，S2O3~（2-）将部分分解。

Because of the reaction of HCHO and NH_4 ~ + , the hydrogen ions will be liberated to increase the acidity of the solution and partially decompose the S_2O_3 ~ ( 2 - ) ion .

pH3.5时流入液比流出液的pH高，是由于土壤的缓冲作用、土壤表面质子化和硫酸根专性吸附释放羟基；

There was the consumption process of H + ion by using influent of pH 3.5 , which was attributed to soil buffer mechanism and specific adsorption of SO 4 2 - .

结果表明，配体Hpb（1）在配合物中存在两种状态：中性和去质子化。

The result shows , that ligand Hpb ( 1 ) presents two states in complexes : neutral and deprotonation .

结果表明，以PEG为内标的ESI/TOF质谱法可对不稳定碱性化合物的质子化分子离子（MH~+）进行准确质量测定，而且简便、快速。

Using polyethylene glycol ( PEG ) as internal reference , ESI / TOF mass spectrometry can determine the accurate mass of the protonated molecular ions of the unsteady basic compounds . This method is simple and expeditious .

从N-乙酰化率15.3%的市售壳聚糖（FNC）出发，乙酰化制备的HNC在细胞生理pH条件下具有良好的溶解特性和质子化率。

Prepared from 15.3 % N-acetylated chitosans ( FNC ), HNC maintained good solubility and supplied enough protonated amino groups to coacervate with terpolymer to form microcapsules under physiological conditions .

实验结果表明：SERS的强度会随着pH值的下降而上升，我们认为此现象反映了DPA在SERS基底上存在着吸附模式的质子化&脱质子化间的平衡。

The results have revealed a clear increase of SERS intensity with the decrease of pH , which is believed to reflect the protonation-deprotonation equilibrium of DPA on its adsorption modes on the SERS substrate .

在酸性溶液中，PPy发生质子酸掺杂，膜的导电性增强；在碱性溶液中发生去质子化脱掺杂，甚至发生过氧化，膜导电性变差。

In acidic solution , proton-acid doping occurs and film conductivity increases . While in alkaline solution , PPy films are de-protonated and confronted over-oxidization thereby becoming less conductivity .

NBO电荷布居分析进一步表明气相中静电效应对质子化影响为主。

The NBO population analysis indicated that the protonation ability was mainly affected by the changes of electron density on the selected atoms .