Momofuku koji preparation
Raw sushi rice was polished thoroughly with intentional
kernel fracture and then soaked in cold water 10–20 min until
30 % of total weight was absorbed.Rice was weighed at each
stage:raw,soaked and cooked.It was then wrapped in
muslin, and steamed at 100 C for 2 h,flipping packet at
30 min intervals.Next it was removed from steamer and left
to sit until temperature reached 40–45 C, then inoculated
with varying percentages of A. orzyae spores, or with isolates
from butabushi fungi. 1 g of Aspergillus spores can inoculate
up to 45 kg of cooked rice(Shurtleff and Aoyagi,2001).A
small amount of All Purpose flour was sterilized,and mixed
with inoculum to aid in even dispersal.Inoculated rice was
swaddled in towels and placed in chamber with constant
temperature between 35 and 40 C and optimum humidity
range of 80–90 %.Rice was stirred at 24 h mark,clumps
broken up,and when even colonization was apparent,rice
was split into furrows to maintain temperature as mold
generates heat during later colonization phase.At 50 h mark,
rice was removed from chamber;and is ready for immediate
use,dehydration or refrigeration for storage.
Momofuku koji preparationRaw sushi rice was polished thoroughly with intentionalkernel fracture and then soaked in cold water 10–20 min until30 % of total weight was absorbed.Rice was weighed at eachstage:raw,soaked and cooked.It was then wrapped inmuslin, and steamed at 100 C for 2 h,flipping packet at30 min intervals.Next it was removed from steamer and leftto sit until temperature reached 40–45 C, then inoculatedwith varying percentages of A. orzyae spores, or with isolatesfrom butabushi fungi. 1 g of Aspergillus spores can inoculateup to 45 kg of cooked rice(Shurtleff and Aoyagi,2001).Asmall amount of All Purpose flour was sterilized,and mixedwith inoculum to aid in even dispersal.Inoculated rice wasswaddled in towels and placed in chamber with constanttemperature between 35 and 40 C and optimum humidityrange of 80–90 %.Rice was stirred at 24 h mark,clumpsbroken up,and when even colonization was apparent,ricewas split into furrows to maintain temperature as moldgenerates heat during later colonization phase.At 50 h mark,rice was removed from chamber;and is ready for immediateuse,dehydration or refrigeration for storage.
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