thermodynamic concentration
1.On the basis of Surface Complexation Model(SCM), a thermodynamic model for the interface of metal oxide/water dispersion (1:1 electrolyte system), which combined the Electrical Double Layer (EDL) model with. thermodynamic equilibrium principles, was set up. Methods for complete evaluation of parameters in the model and calculation of the concentration distribution were proposed and a corresponding versatile computer program was compiled.
2.The modeling on calculation of R407C thermodynamic properties is established upon the basis of CSD equation of state, and the effect of the difference of the concentration of R407C which is caused by the technique of the refrigerant production on the performance test of the compressor is analyzed.
3.Changes of nickel ion and butynediols (BOZ) concentration in electroless plating Ni-P-C-O solution were determined by UVVis spectrophotometry with high performance liquid chromatography. Thermodynamic functions, such as ΔGTφ, ΔH and ΔS, and kinetic parameters of the Ni-P-C-O alloy chemical plating process were obtained. The reaction mechanism between nickel ion and butynediols in the electroless plating process was analyzed.
4.A method to calculate quantitatively the adsorption volume or adsorption space of per mass of adsorbent derived from both the adsorbed molecule volume and the maximum adsorbance of a solute in an adsorption isotherm under a given experimential condition is presented firstly for a solid/liquid adsorption system of the solute in a dilute aqueous solution.This method is suitable for not only mono-layer adsorption,but also mani-layer adsorption and micelle adsorpion of surfactant constructed by hydrophile and lipophile groups.Therefore,the surface concentration of the adsorbate,CS, deduced from the adsorption volume is possessed of the meaning of true concentration,and the value of the patition coefficient of the adsorbate between solid and liquid phass,Pα, attained by the CS and the C,solution concentration of the adsorbate,can be accurate.The foregoing a set of calculations are presented for the solid-liquid adsorption systems consisted of the wool fiber and separately dodecyltrimethyl-ammonium bromide (DTAB) and hexadecyltrimethyl-ammonium bromide (CTAB) in this paper.This provides a strong basis for adsorption thermodynamic investigation of adsorbate.
5.The results showed that its yield was inversely proportional to the concentration of α-amylase and reaction time when the maize starch was hydrolyzed by α-amylase; the granular maize starch was converted into hollow-porous starch by ct-amylase, furthermore it was cracked to the fragments, it was discovered that there were laminated growth ring structure inside starch granular shown on such cracked granular fragments; The crystallinity of maize starch granule can not he increased by the enzyme hydrolysis; the thermodynamic stability of the product was reduced when the hydrolysis time was long.
