The effects of temperature, sodium chloride content, sodium nitrate content and pH value on muscle DPPIV activity were evaluated with Response Surface Method by Design-experts 6.0 software, and muscle actual DPPⅣ activity after each processing stage of Jinhua ham was predicted with response surface regression equation.
The effects of processing temperature,sodium chloride content,sodium nitrate content and pH value on muscle DPPⅠ activity were evaluated with response surface method,and DPPⅠ activity of muscle after each processing stage of Jinhua ham was predicted.
The results of multi-factor-and-multi-level experiments showed that the concentration changing of glucose,sodium nitrate and pH affected the carotenoids yield remarkably and the sample of A3B3C1 containing 3 g/L of glucose and 1.5 g/L of sodium nitrate,pH 6.0 was the best among all samples,and its output of carotenoids reached 2.318 mg/g.
The particle size index of the nine samples of domestic corn determined significantly correlated with their grain vitreousness and the percentage of the kernels sunk in a sodium nitrate solution with a specific gravity of 1.275 g/ml.
The sol coagulation thresholds are determined in the presence of sodium nitrate and sulfate, as well as of mixed magnesium salt at various pH values of the dispersion medium.
New nanocomposites based on zeolites (NaA-NaNO2, NaA-NaNO3) and opals (o-NaNO2, o-NaNO3) that contain sodium nitrite or sodium nitrate nanoparticles in cages of regular porous matrices are prepared.
This essay introduces a way of preparing sodium nitrate from brine by ion ex-change technology. It makes up for the insufficiency that sodinm nitrate is prepared by nitrateend gas, and also develops a new product for the comprehensive utilization of salt field brine.
Based on the principle of Particle Size Index, a new method for corn hardness determination was worked out by means of a JFS micro grain pulverizer (cutter/hammer type). The results indicated that with such working parameters of the pulverizer as cutter clearance 0.75mm, screen perforations 2 mm, grinding duration 60s and sample weight 20 g, and such working parameters of the sifter as 30 meshes/inch, 1 min for clockwise and counterclockwise rotation respectively, the resolution of the new method proved h...
Sixty experimental Jinhua hams were processed according to typically traditional processing technology with fresh hams from hind legs of local hybrid pigs of Lanxi, Zhejiang Province, China. Biceps femoris was sampled from 5 hams randomly taken each time from one of the 6 processing stage, namely, green ham before salting, end of salting, end of sun-drying, mid-aging, end of aging and end of post-aging. Sample potential DPPIVactivity at pH 7.0 and temperature 37℃ as well as some general physical and che...