title: Decontamination effect of milling by a jet mill on bacteria in rice flour.
abstract: The decontamination effect of milling by a jet mill was investigated by counting the number of bacteria in brown and white rice flour with mean particle diameters of 3, 20, and 40µm prepared by the jet mill. In the jet mill, the particles are crushed and reduced in size by the mechanical impact caused by their collision. Although the brown and white rice grains were contaminated with approximately 10(6) and 10(5) CFU/g bacteria, the microbial load of the rice flour decreased as the mean particle diameter decreased, ultimately decreasing to approximately 104 and 103 CFU/g in the brown and white rice flour. The temperature and pressure changes of the sample were not considered to have an effect on reducing the bacterial count during the milling. Hence, it was thought that the rice flour was decontaminated by other effects.
authors: National Food research Institute, National Agrisulture and Food Research Organization, Kannondai, Tsukuba, Japan. itarus@affrc.go.jp
authors: Itaru
authors: I
authors: Sotome
authors: Daisuke
authors: D
authors: Nei
authors: Masuko
authors: M
authors: Tsuda
authors: Sharif Hossen
authors: SH
authors: Mohammed
authors: Makiko
authors: M
authors: Takenaka
authors: Hiroshi
authors: H
authors: Okadome
authors: Seiichiro
authors: S
authors: Isobe
mesh_terms: D058491:Bacterial Load; D003666:Decontamination / Q000295:instrumentation / Q000379:methods*; D004867:Equipment Design; D005433:Flour / Q000382:microbiology*; D005511:Food Handling / Q000295:instrumentation / Q000379:methods*; D005516:Food Microbiology / Q000295:instrumentation / Q000379:methods*; D012275:Oryza / Q000737:chemistry / Q000382:microbiology*; D010316:Particle Size; D012639:Seeds / Q000737:chemistry / Q000382:microbiology