FIELD: process for preparing of fresh onion for further usage in space feeding.
SUBSTANCE: method involves sequentially extracting Mortierella lignicola micromycet biomass using non-polar extractant in above-critical state, water, alkali, water, acid, water, alkali, and water; joining first extract with solid residue for producing of preparation from biomass; sterilizing distilled water, gauze wads and smoking paper; preparing 70%-ethyl alcohol solution and 0.005%-suspension of biomass preparation using sterilized distilled water; inspecting bulb onion; wiping each onion bulb with sterilized gauze wad soaked in ethyl alcohol solution; removing loosely adhering covering layer scale; holding in suspension of biomass preparation during 5 min; cutting off neck part; cleaning stem; washing using ethyl alcohol solution with neck being oriented downward, and drying at temperature of 35±5 C until residual moisture content of upper layer scale is 18-20%; wiping each onion bulb using sterilized gauze wad soaked in ethyl alcohol solution; providing ultraviolet radiation of onion bulb during 30 min at each opposite side at radiation power of 1.5-2.5 W/m3; individually packaging each onion bulb in smoking paper under aseptic conditions and placing in single layers into sterile polymeric trays.
EFFECT: prolonged storage life of bulb onion fit for further usage in space feeding.
1 ex
