title: [Irradiation effect of 60Co gamma ray on Aspergillus flavus spores in normal saline and maize].
abstract: OBJECTIVE
  To observe irradiation effect of gamma ray on Aspergilllus flavus spores.
  
  
  METHODS
  Aspergillus flavus spores of different concentration were prepared on two media and were exposed to gamma ray. D10 values and theoretical minimal sterilizing doses were calculated by colony counting results. Actual minimal sterilizing doses were verified according to theoretical dose.
  
  
  RESULTS
  D10 value and minimal sterilizing dose of high concentration spore in normal saline were 0.39 kGy and 2.5 kGy. Those of low concentration spore in normal saline were 0.47 kGy and 1.5 kGy. Dl0 value and minimal sterilizing dose of high concentration spore in maize were 0.67 kGy and 3.0 kGy. Those of low concentration spore in maize were 0.72 kGy and 2.0 kGy.
  
  
  CONCLUSIONS
  3.0 Gy may be suitable for grain processing to sterilize Aspergillus flavus.
authors.affiliation: Institute for Nutrition and Food Safety, Chinese CDC, Beijing, China. billyzhongkai@163.com
authors.forename: Kai
authors.initials: K
authors.lastname: Zhong
authors.forename: Xiang
authors.initials: X
authors.lastname: Gao
authors.forename: Rong
authors.initials: R
authors.lastname: Ji
mesh_terms: D001231:Aspergillus flavus / Q000254:growth & development / Q000378:metabolism / Q000528:radiation effects*; D003037:Cobalt Radioisotopes; D015169:Colony Count, Microbial; D004307:Dose-Response Relationship, Radiation; D005514:Food Irradiation; D005516:Food Microbiology; D005720:Gamma Rays; D013172:Spores, Fungal / Q000528:radiation effects*; D003313:Zea mays / Q000737:chemistry / Q000382:microbiology*
chemical_list: D003037:Cobalt Radioisotopes