METHOD FOR PREPARING OF SPECIAL FRESH ONION FOR STORAGE Russian patent published in 2008 - IPC A01F25/00 

FIELD: space feeding.

SUBSTANCE: method involves providing onion preparing operations; extracting Saprolegnia parasitica micromycet biomass using non-polar extractant in super-critical state, water, alkali, water, acid, water, alkali, and water; joining first extract with solid residue for producing of biomass preparation; sterilizing distilled water, gauze wads and smoking paper; preparing 70%-ethyl alcohol solution and 0.01%-suspension of biomass preparation based on sterilized distilled water; inspecting bulb onion; washing in sweet running water; holding in biomass preparation suspension at room temperature during 5 min; drying at temperature of 35±5 C until residual moisture content of upper scale layers is 18-20%; removing non-tightly adhering covering scale; cutting-off neck and cleaning stem; wiping each bulb with sterilized gauze wad moistened in ethyl alcohol solution; exposing each opposite side of bulb to ultraviolet radiation during 30 min at radiation intensity of 1.5-2.5 W/m³; packaging each bulb in aseptic conditions in smoking paper and placing in single layers within sterile polymeric trays.

EFFECT: increased onion storage time.