Use of oxygen for the cleaning, passivation, and preservation of power-generating equipment at the Kharanorskaya SAPP

Studies conducted on two power-generating units at the Kharanorskaya SAPP relative to the steam-water-oxygen passivation, preservation, and partial cleaning of all boiler-heating surfaces, including the surfaces of the reheater, and passivation of the surfaces of the high-pressure heaters on the steam and water sides by the steam-oxygen method, as well as partial passivation, preservation, and cleaning of turbine blading are presented. __________ Translated from élektricheskie Stantsii, No. 6, pp. 56–64, May, 2006.     

大豆蛋白-多糖干热制备复合物及其反应机理研究(Ⅱ)功能性质的改善

对SAPP与葡聚糖(DEX)复合物的乳化活性以及乳化稳定性等功能性质进行系统研究。结果表明,干热反应产物在pH3.0以及pH10.0时保持好的乳化活性;并且在高温、高盐条件下乳化活性变化很小。对反应产物进行差示扫描(DSC)分析,进一步证实蛋白已经与多糖结合反应生成新的化合物,该产物热稳定性很高,比原有蛋白的变性温度提高了几乎两倍。     

MTGase聚合大豆蛋白及其改性机理(III) MTGase聚合改性大豆蛋白机理

采用紫外光谱 (UV -spectrum)、荧光光谱 (fluorescencespectrum)以及红外光谱 (FT -IRspectrum)分析了SAPP以及其MTGase -聚合物的结构特征。紫外光谱结果显示MTGase催化SAPP导致它的多肽链的侧链结构发生了变化 ,Tyr和Trp残基的吸收峰红移说明其Cα原子的构型从非平面型转变为平面型 ,而荧光光谱显示MTGase催化导致SAPP的疏水区域暴露出来 ,而且还经历一个空间结构重排的过程 ,而红外光谱显示这种聚合作用还导致多肽链的二级结构发生较大的变化 ,即一部分的 β -折叠二级结构转变为以α -螺旋或无规卷曲。从蛋白质分子结构的角度 ,探讨了MTGase聚合SAPP的改性机理 ,指出其机理在于MTGase聚合导致了SAPP的空间结构发生了变化的缘故。     

利用Maillard反应制备大豆蛋白-葡聚糖共价复合物

研究了大豆酸沉蛋白和葡聚糖共价键合制备反应及其产物乳化性能的变化.在干热条件下,两种大分子通过Maillard反应进行共价键合并通过聚丙烯酰胺凝胶电泳验证了大分子复合物的存在. 结果表明产物具有比大豆酸沉蛋白更高的对油/水乳状液的乳化能力,复合物在pH 3.0和pH 10.0时均能保持较好的乳化活性,并且在高温、高盐条件下乳化活性变化很小.     

液相体系制备大豆酸沉蛋白-葡聚糖共价复合物及其反应机制（Ⅲ）功能性质的改善

对SAPP与葡聚糖（DEX）复合物的乳化活性以及乳化稳定性等功能性质进行系统研究。结果表明,液相体系反应产物在酸性条件下和100℃处理3min时乳化活性指数（EAI）降低,中性和强碱性条件下表现为优越的乳化活性和乳化稳定性。无论是干热5d或者液相体系反应,SAPP-葡聚糖共价复合物在所有pH范围内都能达到很好的溶解性能,并对80％乙醇体系反应前后的Maillard反应产物进行差示扫描（DSC）分析,进一步证实蛋白已经与多糖结合反应生成新的化合物,该产物热稳定性很高。     

SAPP提铀螯合树脂的耐氯性能测试

研究了苯乙烯-二乙烯苯骨架氨基磷酸酯功能基树脂(SAPP)对铀吸附性能、耐氯性能、对钙和铁离子的耐受性能以及淋洗性能,并对树脂功能基与铀的作用机制进行了分析。研究表明:当铀溶液中ρ(Cl~-)为25.0g/L时,每克干树脂对铀的吸附容量140mg;树脂对钙离子也表现出了较好的耐受性;在ρ(Fe~(3+))为1.0g/L时,每克干树脂对铀的吸附容量50 mg。此外,动态吸附试验证实该树脂对铀的吸附速率较快;可采用60g/L NaHCO_3+20g/L Na_2CO_3组成的混合淋洗剂对吸附饱和的SAPP树脂进行淋洗。     

无毒防锈颜料在水性马来酸酐共聚物涂层中的防腐蚀性能

研究了添加第二代无毒活性磷酸盐SAPP和SRPP的水性马来酸酐共聚物涂层的防腐蚀性能.通过盐雾试验、电化学阻抗谱(EIS)和浸泡试验研究这两种防锈颜料分散在水性马来酸酐共聚物涂层后对基材的防腐性能.结果表明两种防锈颜料加入涂层后都能明显提高涂层的防腐蚀性能,且SRPP颜料的防腐蚀效果优于SAPP颜料.     

Effect of after-cooking darkening inhibitors on stability of frying oil and quality of french fries

The effect of two after-cooking darkening inhibitors, sodium acid pyrophosphate (SAPP) and calcium acetate (CaAc), and their combined effect on frying oil stability and quality of french fries produced were evaluated over a period of 72 h. Samples of frying oil and par-fried french fries were taken at 3-h intervals through each experiment and analyzed for selected chemical and physical parameters. As the frying time increased, all the oil samples contained increased amounts of deterioration products. The color index and free fatty acid (FFA) values were highly correlated with frying time. There were no significant effects on oil properties in terms of FFA until 9 h of frying among the 4 pretreatments. However, from 12 to 72 h of frying, oil used to fry potatoes treated with SAPP contained less FFA than oils exposed to CaAc alone or in combination with SAPP. The fat content of par-fried french fries was approximately 0.11 g/g dry matter and remained relatively constant during extended frying. After-cooking darkening of par-fried french fries and final color of the fries were affected by the pretreatment, but not by the frying time.     

大豆蛋白与多糖的干热反应研究

对十热反应制备大豆蛋白（SAPP）-多糖兆价复合物的各种影响因素进行分析，得出在60℃、79％相对湿度（RH）条件下干热反应5d所得产物的功能特性改善最明显；并结合紫外光谱分析了反应前后蛋白及其复合物分了结构特征。     

液相体系制备大豆酸沉蛋白-葡聚糖共价复合物及其反应机制(Ⅱ)反应机制的理论分析

采用凝胶过滤色谱和红外光谱(FT-IR)分析了反应前后蛋白与多糖Maillard反应产物分子结构特征,证实反应后SAPP与葡聚糖产生了共价结合;并通过凝胶渗透色谱(GPC)技术对干热反应后所得共价复合物的分子量分布进行分析,结果表明液相体系所得蛋白-多糖共价复合物与干热法所得产物的数均分子量和重均分子量非常相近.