Solution properties of 7S globulins (7S), 11S globulins (11S) and soy protein isolates (SPI) in dimethylsulfoxide (DMSO)/urea solvent system were studied by intrinsic viscosity and particle size distributions. The res...Solution properties of 7S globulins (7S), 11S globulins (11S) and soy protein isolates (SPI) in dimethylsulfoxide (DMSO)/urea solvent system were studied by intrinsic viscosity and particle size distributions. The results showed that the existence of urea was the main reason for the denaturation and solubility of soy protein in the system, and the effects were more obvious with increasing of urea concentration in solutions. Suitably dissolution temperature and time contributed to the solubility of soy proteins.展开更多
Cyclic voltammetry and chronoamperometry were used to investigate theelectrochemical behavior of Pr^(3+) ions in a system of 0.01 mol centre dot dm^(-3) Pr(CH_3SO_3)_3 +0.01 mol centre dot dm^(-3) FeCl_2 + 3.0 mol cen...Cyclic voltammetry and chronoamperometry were used to investigate theelectrochemical behavior of Pr^(3+) ions in a system of 0.01 mol centre dot dm^(-3) Pr(CH_3SO_3)_3 +0.01 mol centre dot dm^(-3) FeCl_2 + 3.0 mol centre dot dm^(-3) urea + DMSO on a R electrode. Someelectrochemical parameters were measured. Potentiostatic depositions between -1.6 and -2.4 V wereapplied to deposit Pr-Fe films in urea-DMSO mixed solution. The Pr content in the alloy films was inthe range of 34.89 wt. percent to 37.15 wt. percent. The Pr-Fe alloy films are proven to beamorphous by XRD (X-ray diffraction).展开更多
The enthalpies of solution of glycine in aqueous solutions of urea,formamide,acetamide,DMSOand acetone were measured at298.15 K by a RD496-Ⅲ microcalorimeter.The transfer enthalpies(ΔtrH) ofglycine from water to aqu...The enthalpies of solution of glycine in aqueous solutions of urea,formamide,acetamide,DMSOand acetone were measured at298.15 K by a RD496-Ⅲ microcalorimeter.The transfer enthalpies(ΔtrH) ofglycine from water to aqueous organic mixtures were derived and interpreted qualitatively with structural hydra-tion interaction model.The results suggest that hydrophilic-hydrophilic interaction between glycine and cosol-vent molecule gives a negative contribution to the transfer enthalpies of glycine,while the hydrophilic hydro-phobic interaction makes a positive contribution.The relative position ofΔtrH-composition profiles viz.urea <formamide <0 <acetamide <DMSO<acetone,characterizes the hydrophobicity or hydrophilicity of the cosol-vent molecule and correctly reflectes the solute-solvent interaction in the transfer process.展开更多
基金National Natural Science Foundation of China (No.50303003)
文摘Solution properties of 7S globulins (7S), 11S globulins (11S) and soy protein isolates (SPI) in dimethylsulfoxide (DMSO)/urea solvent system were studied by intrinsic viscosity and particle size distributions. The results showed that the existence of urea was the main reason for the denaturation and solubility of soy protein in the system, and the effects were more obvious with increasing of urea concentration in solutions. Suitably dissolution temperature and time contributed to the solubility of soy proteins.
文摘Cyclic voltammetry and chronoamperometry were used to investigate theelectrochemical behavior of Pr^(3+) ions in a system of 0.01 mol centre dot dm^(-3) Pr(CH_3SO_3)_3 +0.01 mol centre dot dm^(-3) FeCl_2 + 3.0 mol centre dot dm^(-3) urea + DMSO on a R electrode. Someelectrochemical parameters were measured. Potentiostatic depositions between -1.6 and -2.4 V wereapplied to deposit Pr-Fe films in urea-DMSO mixed solution. The Pr content in the alloy films was inthe range of 34.89 wt. percent to 37.15 wt. percent. The Pr-Fe alloy films are proven to beamorphous by XRD (X-ray diffraction).
文摘The enthalpies of solution of glycine in aqueous solutions of urea,formamide,acetamide,DMSOand acetone were measured at298.15 K by a RD496-Ⅲ microcalorimeter.The transfer enthalpies(ΔtrH) ofglycine from water to aqueous organic mixtures were derived and interpreted qualitatively with structural hydra-tion interaction model.The results suggest that hydrophilic-hydrophilic interaction between glycine and cosol-vent molecule gives a negative contribution to the transfer enthalpies of glycine,while the hydrophilic hydro-phobic interaction makes a positive contribution.The relative position ofΔtrH-composition profiles viz.urea <formamide <0 <acetamide <DMSO<acetone,characterizes the hydrophobicity or hydrophilicity of the cosol-vent molecule and correctly reflectes the solute-solvent interaction in the transfer process.
