为探讨磷酸盐(三聚磷酸钠、六偏磷酸钠、焦磷酸钠(tetrasodium pyrophosphate,TSPP))和大豆分离蛋白(soy protein isolate,SPI)对草鱼肌原纤维蛋白凝胶化的影响,采用热处理方法,将不同质量浓度的磷酸盐、SPI与草鱼肌原纤维蛋白混合制成...为探讨磷酸盐(三聚磷酸钠、六偏磷酸钠、焦磷酸钠(tetrasodium pyrophosphate,TSPP))和大豆分离蛋白(soy protein isolate,SPI)对草鱼肌原纤维蛋白凝胶化的影响,采用热处理方法,将不同质量浓度的磷酸盐、SPI与草鱼肌原纤维蛋白混合制成凝胶。用黏度、嫩度、持水性、显微结构和粗糙度表征凝胶特性。结果表明:磷酸盐可促进蛋白与水的相互作用,有利于蛋白形成稳定、有序的交联网络并保存水分;SPI增大了蛋白间的交联程度,促进凝胶保水能力,提高蛋白凝胶体系的稳定性;磷酸盐、SPI的加入显著提高了凝胶品质,TSPP-SPI联合处理组较其他处理组具有更好的持水性(P<0.05)、嫩度(P<0.05)及适中的黏度(P<0.05),其中,当采用1.2 g/100 mL TSPP、5 g/100 mL SPI体积比1∶3处理时,凝胶具有嫩度大(P<0.05)、持水性好(P<0.05)、黏性适中(P<0.05)、粗糙度小(P<0.05)等特点,该处理方式能够显著提高草鱼肌原纤维蛋白凝胶特性。展开更多
The effect of sodium hexametaphosphate（SHMP） on the separation of serpentine from pyrite and its mechanism were studied systematically through flotation tests,sedimentation tests,surface dissolution,ζ potential tes...The effect of sodium hexametaphosphate（SHMP） on the separation of serpentine from pyrite and its mechanism were studied systematically through flotation tests,sedimentation tests,surface dissolution,ζ potential tests,adsorption measurements,and infrared spectroscopic analyses.The results show that the SHMP could significantly reduce the adverse effect of serpentine on the flotation of pyrite and make the mixed sample of pyrite and serpentine more disperse in the alkaline condition,thus improve the adsorption of xanthate on pyrite.The action mechanism of the SHMP is that it lowers the pH value at the isoelectric point of serpentine and enhances the negative charge through the dissolution of magnesium from the surface of serpentine and adsorbing on the surface of serpentine.It changes the total interaction energy between serpentine and pyrite from gravitational potential energy to repulse potential energy,according to the calculation of the EDLVO theory.展开更多
文摘为探讨磷酸盐(三聚磷酸钠、六偏磷酸钠、焦磷酸钠(tetrasodium pyrophosphate,TSPP))和大豆分离蛋白(soy protein isolate,SPI)对草鱼肌原纤维蛋白凝胶化的影响,采用热处理方法,将不同质量浓度的磷酸盐、SPI与草鱼肌原纤维蛋白混合制成凝胶。用黏度、嫩度、持水性、显微结构和粗糙度表征凝胶特性。结果表明:磷酸盐可促进蛋白与水的相互作用,有利于蛋白形成稳定、有序的交联网络并保存水分;SPI增大了蛋白间的交联程度,促进凝胶保水能力,提高蛋白凝胶体系的稳定性;磷酸盐、SPI的加入显著提高了凝胶品质,TSPP-SPI联合处理组较其他处理组具有更好的持水性(P<0.05)、嫩度(P<0.05)及适中的黏度(P<0.05),其中,当采用1.2 g/100 mL TSPP、5 g/100 mL SPI体积比1∶3处理时,凝胶具有嫩度大(P<0.05)、持水性好(P<0.05)、黏性适中(P<0.05)、粗糙度小(P<0.05)等特点,该处理方式能够显著提高草鱼肌原纤维蛋白凝胶特性。
基金Project(2007CB613602)supported by the National Basic Research Program of China
文摘The effect of sodium hexametaphosphate（SHMP） on the separation of serpentine from pyrite and its mechanism were studied systematically through flotation tests,sedimentation tests,surface dissolution,ζ potential tests,adsorption measurements,and infrared spectroscopic analyses.The results show that the SHMP could significantly reduce the adverse effect of serpentine on the flotation of pyrite and make the mixed sample of pyrite and serpentine more disperse in the alkaline condition,thus improve the adsorption of xanthate on pyrite.The action mechanism of the SHMP is that it lowers the pH value at the isoelectric point of serpentine and enhances the negative charge through the dissolution of magnesium from the surface of serpentine and adsorbing on the surface of serpentine.It changes the total interaction energy between serpentine and pyrite from gravitational potential energy to repulse potential energy,according to the calculation of the EDLVO theory.
