Rheological properties of low-concentration Konjac gum and impacts of concentration,shearing rate,pH value and stirring time on its viscosity were studied.The results show that the viscosity of low-concentration Konja...Rheological properties of low-concentration Konjac gum and impacts of concentration,shearing rate,pH value and stirring time on its viscosity were studied.The results show that the viscosity of low-concentration Konjac gum increases with the increase of its concentration.The solution presents pseudo-plasticity fluid,which shows the characters of shear thinning as follows:first,its viscosity decreases gradually as the temperature increases,and then increases with the increase of temperature.The viscosity decreases sharply at both acid and alkaline conditions,indicating that it is influenced apparently by pH value.And the viscosity of low-concentration Konjac gum is also impacted by the stirring time.展开更多
Konjac black tea(sugar-free) and konjac glucomannan(KGM) solution were studied by using rheometer,refractometer etc.The relationship between their rheological properties and temperature or concentration was discussed ...Konjac black tea(sugar-free) and konjac glucomannan(KGM) solution were studied by using rheometer,refractometer etc.The relationship between their rheological properties and temperature or concentration was discussed in detail.The results showed that viscosity was significantly affected by temperature and concentration;and pH stability of Konjac-tea was related to the molecular property of KGM.展开更多
为了开发适合吞咽困难患者食用的植物蛋白3D打印食品,本文将亚麻籽胶和魔芋胶按照质量比2:3进行复配形成复合多糖,并与豌豆分离蛋白(Pea protein isolate,PPI)进行剪切处理,探究了不同浓度的复合多糖(0.5%、0.7%、0.9%、1.1%和1.3%)对...为了开发适合吞咽困难患者食用的植物蛋白3D打印食品,本文将亚麻籽胶和魔芋胶按照质量比2:3进行复配形成复合多糖,并与豌豆分离蛋白(Pea protein isolate,PPI)进行剪切处理,探究了不同浓度的复合多糖(0.5%、0.7%、0.9%、1.1%和1.3%)对乳液凝胶粒径、流变学特性和3D打印性能的影响。并通过国际吞咽障碍标准化倡议(IDDSI)对乳液凝胶进行评估。结果表明:不同浓度的复合多糖改善乳液凝胶的效果不同。粒径测试表明随着复合多糖浓度的增加,PPI乳液凝胶的粒径呈现减小的趋势。流变学特性表明多糖的加入使PPI乳液凝胶具有粘弹性,且所有的乳液凝胶样品均显示出G'>G''。当复合多糖浓度为1.1%时,乳液凝胶的粒径最小,G'和G''值最高,粘弹性最好,打印的产品具有最清晰的纹理、最稳定的结构和较好的印刷适应性。IDDSI测试表明添加1.1%和1.3%浓度复合多糖的乳液凝胶可归类为Ⅳ级过渡性食品。综上所述,1.1%浓度的复合多糖对豌豆分离蛋白乳液凝胶3D打印性能的改善最显著,这为开发植物基3D打印油墨提供理论依据。展开更多
基金Project(08RM05) supported by Institute of Rheological Mechanics and Material Engineering of Central South University of Forestry Technology
文摘Rheological properties of low-concentration Konjac gum and impacts of concentration,shearing rate,pH value and stirring time on its viscosity were studied.The results show that the viscosity of low-concentration Konjac gum increases with the increase of its concentration.The solution presents pseudo-plasticity fluid,which shows the characters of shear thinning as follows:first,its viscosity decreases gradually as the temperature increases,and then increases with the increase of temperature.The viscosity decreases sharply at both acid and alkaline conditions,indicating that it is influenced apparently by pH value.And the viscosity of low-concentration Konjac gum is also impacted by the stirring time.
基金National Natural Science Foundation of China(3 0 3 710 0 9)
文摘Konjac black tea(sugar-free) and konjac glucomannan(KGM) solution were studied by using rheometer,refractometer etc.The relationship between their rheological properties and temperature or concentration was discussed in detail.The results showed that viscosity was significantly affected by temperature and concentration;and pH stability of Konjac-tea was related to the molecular property of KGM.
文摘为了开发适合吞咽困难患者食用的植物蛋白3D打印食品,本文将亚麻籽胶和魔芋胶按照质量比2:3进行复配形成复合多糖,并与豌豆分离蛋白(Pea protein isolate,PPI)进行剪切处理,探究了不同浓度的复合多糖(0.5%、0.7%、0.9%、1.1%和1.3%)对乳液凝胶粒径、流变学特性和3D打印性能的影响。并通过国际吞咽障碍标准化倡议(IDDSI)对乳液凝胶进行评估。结果表明:不同浓度的复合多糖改善乳液凝胶的效果不同。粒径测试表明随着复合多糖浓度的增加,PPI乳液凝胶的粒径呈现减小的趋势。流变学特性表明多糖的加入使PPI乳液凝胶具有粘弹性,且所有的乳液凝胶样品均显示出G'>G''。当复合多糖浓度为1.1%时,乳液凝胶的粒径最小,G'和G''值最高,粘弹性最好,打印的产品具有最清晰的纹理、最稳定的结构和较好的印刷适应性。IDDSI测试表明添加1.1%和1.3%浓度复合多糖的乳液凝胶可归类为Ⅳ级过渡性食品。综上所述,1.1%浓度的复合多糖对豌豆分离蛋白乳液凝胶3D打印性能的改善最显著,这为开发植物基3D打印油墨提供理论依据。
