pure seed
5.The result showed that the calibration curve generated when ATT as 22 db and the weight of pure oil as 0.600 0~0.720 0 g may be used to determine the oil contents of soybean seed, accordingly, when ATT as 31 db and the weight of pure oil as 1.300 0~2.200 0 g may be used to determine the oil contents of rapeseed seed.
6.The luminescence uniformity of large-size PbWO_4:(Mo,Y) and pure PbWO_4 crystals grown by modified Bridgman method was investigated through characterization on the optical transmittance, X-ray excited luminescence, light yield and irradiation damage at different distance from seed end face of large crystals.

