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碱性

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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。

UV-Vis spectra were measured in weak acidity, neutrality and weak base, the absorption spectra were changed with a large red shift in weak base because of intramolecular charge transfer and azophenol-quinone tautomerism.

并且测量了它们在弱酸性,中性和弱碱性条件下的紫外吸收光谱,讨论了吸收光谱与分子结构之间的关系,认为分子内的电荷转移和醌式互变是碱性条件下吸收光谱发生明显变化的根本原因。

This alkalinity may be derived from strong alkalis such as sodium hydroxide or from hydrolysis of the salts of weak acids, trisodium phosphate.

碱性通常以氢氧化钠或磷酸钠水解而来。大多数碱性清洁剂都含有界面活性剂或少量有机溶剂

The EDTA inhibition dynamics of Ulva pertusa Kjellm alkaline phosphatase and calf intestine alkaline phosphatase were the complexing irreversible inhibition, but these two were different in the inhibition process.

EDTA对孔石莼碱性磷酸酶和小牛肠碱性磷酸酶的抑制动力学均为络合型不可逆抑制,但是二者在抑制过程中具体情况稍有不同。

This may be because that the metal ions in calf intestine AKP is more close to the surface of enzyme molecule than in Ulva pertusa kjellm , EDTA can exerted inhibitory effect on the AKP from calf intestine more easily and quickly.

这可能是由于小牛肠碱性磷酸酶活性位点的金属离子相对于孔石菇碱性磷酸酶的活性伍点来说突出在酶大分子的表面,EDTA容易与之发生络合作用,从而快速对小牛肠AKP产生抑制作用。

The research on bound rubber and reinforcing effect of mineral filler showed that there are four kind of interactions between filler and rubber matrix in uncured mix The unbounded rubber on the surface of filler will solve in organic solvent The rubber bounded by stronger physical or chemical interaction with filler will dissolve in organic solvent The bound rubber on the surface of filler by different extent acid-base interactions will solve in basic organic solvent The bound rubber on the surface of filler by chemical action (no acid-base type) will dissolve in basic organic solvent

结合橡胶和增强作用的研究表明,在混炼胶中,硅橡胶与矿物填料的作用形式有四种。没有联结在矿物表面的非结合橡胶和仅靠物理吸附联结在填料表面的硅橡胶将溶解于有机溶剂;与填料有较强相互作用的硅橡胶不溶于有机溶剂;通过不同层次的酸碱作用联接在矿物表面的硅橡胶将溶解于碱性有机溶剂;与填料有牢固化学结合的硅橡胶不溶于碱性有机溶剂。

The alloy catalyst was found to be unstable in the acidic solution because of the electrochemical and chemical dissolution of the catalyst.

发现在酸性溶液中,钯铁合金催化剂对氧还原反应的催化活性不稳定,原因是钯铁合金催化剂在酸性溶液中发生电化学/化学溶解;在碱性溶液中,覆盖在电极表面的钯铁合金催化剂的质量及电化学活性面积在电化学扫描过程中不发生明显变化,保持对氧还原反应的催化活性,证明钯铁合金催化剂在碱性介质中非常稳定。

After that the territor ial extensional stress field caused by the plates movement and the mantle upheave etc. makes the Yishu fault system keep on cutting downward tend to form rift valley. The tectonism causes the fairly large-scale invasion of the small neutral -partial alkaline rock-bodies and the gold mineralization in the Linyi area.

燕山中期板块俯冲运动和地幔上涌等因素引起的区域性拉张作用使沂沭断裂继续向下深切张裂,向裂谷性质演化,造成沂南、临沂等地区较大规模中性偏碱性次火山岩型小岩体的侵入和火山喷发,在火山机构内或围绕次火山岩小岩体形成与中性偏碱性次火山岩有关的次火山岩型金矿化。

The solubility of uranium oxide also became faster along with the increase of acidity of HAc-NaAc buffer and increase of alkalinity of NH4OH-NH4Cl buffer systems.

铀氧化物在HAc-NaAc体系中的溶解速率随酸度增加而加快,在碱性NH4OH-NH4Cl体系中溶解速率随碱性增加而加快。

The Zn(superscript 2+)of the coating material showed a powerful washability in alkaline synthetic perspiration, which proved that the prepared coating material was stable in alkaline synthetic perspiration.

纳米功能织物在碱性人工汗液中Zn2+的溶出性较小,证明制备的纳米氧化锌整理剂对碱性人工汗液稳定性较好。

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