Abstract:
PURPOSE: A natural food preservative is provided to minimize the generation of problems caused by the toxicity and irritation effect of a chlorine based chemical preservative. CONSTITUTION: A natural food preservative contains 1-2 parts of paeonia lactiflora extract by weight, 1-2 parts of cinnamomum loureirii extract by weight, and 3-8 parts of rhus japonica extract by weight. The extracts are obtained by the following steps: heat-extracting paeonia lactiflora, cinnamomum loureirii, and rhus japonica extract at 50-90 deg C for 30-200 minutes after mixing with solvents, separately; decompress-concentrating each extract at 20-80 deg C for 60-200 minutes; and freeze-drying the obtained concentrate.
Abstract:
PURPOSE: A manufacturing method of lactic acid bacteria powder is provided to manufacture the lactic acid bacteria which can maintain constant viable cell count. CONSTITUTION: A manufacturing method of lactic acid bacteria powder comprises the following steps: pre-cooling a container(S3); providing nitrogen gas inside the pre-cooled container; spraying a lactic acid bacteria culturing liquid inside the container(S4); and freeze-drying the sprayed lactic acid bacteria(S5). The lactic acid bacteria culturing comprises the following steps: controlling pH and adding nutrient component to a culture medium(S1); substituting the cultured medium(S2). The lactic acid bacteria are the Lactobacillus bulgaricus. The incubation time of the lactic acid bacteria is 21-39 hours. The nutrient component addition adds 1±0.2% of mannose, and the pH control of the culture medium adds 0.1±0.02% of calcium carbonate. The manufacturing method substitutes the cultivated culture medium with BPW(buffered peptone water). [Reference numerals] (S1) Nutrition element and pH controlling step; (S2) Medium substitution step; (S3) Pre-cooling step; (S4) Spraying step; (S5) Freeze drying step