| 摘要 |
PROBLEM TO BE SOLVED: To obtain the subject powder extremely reduced in various germs without loosing vitamin D1 and ergosterol by subjecting mushroom powder to a heating treatment with superheated steam under pressure. SOLUTION: Mushroom powder is subjected to a heat treatment under pressure with superheated steam at 1.0 to 3.0 kg/cm<2> (gauge) pressure and at 130-160 deg.C, preferably 135-155 deg.C for 1-66 sec., preferably 2-20 sec to provide the objective powder. Granules having <=10 mesh particle size or powder obtained by subjecting mushroom such as Lentinus edodes, Flammulina velutipes, Pleurotus ostreatus, edible fungus Pholiota nameko, Suillus bovinus, Polyozellus multiplex, Ramaria botrytis, Morchella esculenta Fr. or Auricularia auricula- judae to drying with hot air in fresh state or after carrying out natural drying so as to reduce water content in the mushroom to <=15 wt.%, preferably 5-10 wt.% and grinding the mushroom with a grinder or granules or powder obtained by subjecting the above granules or powder to irradiation with ultraviolet rays is preferably used as the mushroom powder which is a raw material. Airflow method or the like is preferably adopted as the heating method. |
