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2709 Alkalic protease was used to hydrolyse dechromed chrome shavings , and the factors that may affect the collagen hydrolysis ratio, including the amount of 2709 alkalic protease, temperature, pH and time of hydrolyzing reaction, were studied.

研究了采用2709碱性蛋白酶水解脱铬革屑制备胶原水解产物时,影响胶原水解率的各种因素。

Research on the solution chemistry of Al-V-Mo system in aquous solutionAccording to the calculation of solution chemistry,the solubility and existing status of Al,V and Mo in acidic and alkalic solution had been analysed in theory.The concentration logarithmic diagram of Al-V-Mo in aquous solution with different concentration and pH had been plotted,the concentration and pH on the distribution of three elements had been analysed.

铝、钒、钼水溶液化学性质的研究:采用溶液化学计算方法对铝、钒、钼体系进行了计算,从理论上分析了铝钒钼在酸性和碱性溶液中的存在状态和溶解性能,绘制了不同浓度及pH条件下铝、钒、钼水体系的优势组分图,分析了离子浓度和pH值对体系中各离子分布的影响,为水溶液中铝、钒、钼的分离技术的选择提供了基础。

Aminobenzene sulfonate high performancing water-reducing ; acid and alkali of environment ; reacting mechanism

氨基苯磺酸高效减水剂;环境中酸碱性;反应机理

An aminobenzene sulfonate-formaldehyde based polymer dispersant with good grinding efficiency was synthesized under alkaline condition using aminobenzene sulfonate, phenol and formaldehyde as main raw materials.

以对氨基苯磺酸、苯酚、甲醛为主要原料,采用碱性合成线路制备了具有助磨效果的氨基磺酸系高效减水剂,系统地研究了单体比例、单体浓度、交联剂用量、反应体系初始pH值、反应时间和反应温度等因素对助剂助磨效果的影响。

The results showed that the red pigment belonged to anthocyanidin, it was soluble in water, stable against heat treatment, light, acid and sugar concentration, tolerant to reduction, but sensitive to alkaline, oxidation and Fe(superscript 3+). The research also showed that acid medium is favorable for extraction. The pigments have more general stability in acid medium and have high ufility value.

结果表明:该色素为水溶性多酚类花色素,在不同的pH环境下显示不同的颜色;其耐热性、耐光性、耐酸、耐糖、耐还原性较好,但耐氧化性、耐碱性较差;Fe(上标 3+)对色素有破坏性;该色素的提取宜在酸性介质中进行,酸性条件下其综合稳定性较优,有较高的利用价值。

The results showed that the red pigment belonged to anthocyanidin,it was soluble in water,stable against heat treatment,light,acid and sugar concentration,tolerant to reduction,but sensitive to alkaline,oxidation and Fe~(3+). The research also showed that acid medium is favorable for extraction.The pigments have more general stability in acid medium and have high ufility value.

结果表明:该色素为水溶性多酚类花色素,在不同的pH环境下显示不同的颜色;其耐热性、耐光性、耐酸、耐糖、耐还原性较好,但耐氧化性、耐碱性较差;Fe3+对色素有破坏性;该色素的提取宜在酸性介质中进行,酸性条件下其综合稳定性较优,有较高的利用价值。

And short of sulfides,which has been proven characteristic for all other gold deposits in the Shuiquangousyenite batholith on the northem margin of North China craton.

&东坪式&金矿系指产于华北克拉通北缘水泉沟碱性杂岩体中的一系列少硫化物、富Te金矿床,是我国发现的特大型金矿的新类型。

Mol〓 by examining the acid number of the system during polymerization. The monomer emulsion of St and CTUP was formed by adjusting pH to 8, and the self-emulsified emulsion polymerization was initiated by using KPS and sodium bisulphite.

以CTUP和St为单体,通过调节体系至弱碱性(pH=8)制成单体/水的乳化液,并在过硫酸钾-亚硫酸氢钠氧化还原体系的引发作用下进行自乳化乳液聚合。

The wood-cellulose grafted polyacrylamide was synthesized with the cerous ammonium nitrate as the initiator. The absorbent resin was produced through hydrolyzing the Cell-g-PAM.

以木纤维为基质,硝酸铈铵为引发剂,成功的制备了纤维素接枝聚丙烯酰胺共聚物,进一步经过碱性水解,获得了具有一定吸水性能的吸水树脂。

After derivatization with 9-fluolenylmeghyl chloroformate at 40℃ in alkalescent environment (pH=8.0), taurine in samples was separated and quantified by HPLC.

在硼酸盐缓冲溶液存在的弱碱性(pH=8.0)环境中样品中的牛磺酸与9-氯甲酸芴甲酯在40℃水浴中反应生成衍生化产物,用反相高效液相色谱法检测定量。

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