Abstract
Husked rice fumigated by a mixed gas of ethylene oxide and methyl bromide was examined on these residual gas amounts change with time, and the fomation of hydrins. Due to the penetration of the gaseous fumigant into the husked rice some of the residual gas were found immediately after the fumigation working was finished but transpired completely in about 48hr the concentration of 10.5g/m3 which was the base specially designated for the present agent. The hydrins were slightly formed in the grains kept for 72hr at the concentration of 21g/m3, which was unable to detect below the dosage, and too, they could not be detected at the dosage of 10.5g/m3 as to the husked grains in warehouses designated by the goverment ordinance.
