Research of formula optimization and storage stability of nutrient set-yogurt containing Oviductus ranae

A nutrient set-yogurt containing Oviductus ranae, using drying Oviductus ranae and fresh milk as main matieral and Lactobacillus bulgaricus and Streptococcus thermophilus as starter culture, was produced and researched the storage stability. The optimum prescription of Nutrient set-yogurt containing Oviductus ranae amount was that drying Oviductus ranae, skim milk powder and sucrose were 0.5%, 5.5% and 6%. And during the storage, the yogurt kept nice physicochemical and microbiological points. Total number of Lactobacillus were more than 106cfu/g, the lowest pH was 4.25, titration acid went up to 97.78°T, holding water capability kept higher than 69%, the viscosity had been increasing until two weeks later and hardness had a certain enhanced.