Inactivation rate of Bacillus subtilis spores irradiated by ultraviolet rays.
スポンサーリンク
概要
- 論文の詳細を見る
The UV inactivation of Bacillus subtilis spores, widely used for examining sterility, was kinetically studied to obtain fundamental information on the design and performance evaluation of practical sterilizers irradiated by ultraviolet rays. The inactivation rate at low extent of sterilization (survival fraction of more than 10-2) was determined under monochromatic irradiation and analyzed by the single-hit-killing model based on the target theory. The inactivation cross-section, φa, was strongly dependent on wavelength; the target number, m, was rather constant from 240 through 300 nm. The inactivation characteristics at high extent of conversion (survival fraction of less than 10-3) under polychromatic irradiation were simulated by considering the presence of a small portion of UV-resistant spores. An improved kinetic model was derived on the assumption of coexistence of two types of spores with different inactivation cross-sections and with the same target number. The observed wavelength-averaged inactivation cross-section for the major portion of spores was evaluated from both the inactivation cross-section obtained with monochromatic irradiation and the spectral distribution of light emitted from a polychromatic lamp.
著者
-
SUGAWARA TAKUO
Department of Chemical Engineering for Resources, Akita University
-
Ohashi Hiroyasu
Department of Fuel Chemistry, Mining College, Akita University
-
YONEYA MICHIO
Department of Chemical Engineering for Resources, Akita University
-
TAMAGAWA SHIGENORI
School of Medicine, Akita University
関連論文
- Synthesis of Zeolite-A Using Silica from Rice Husk Ash
- SORPTION OF AMINO ACIDS BY ION EXCHANGE MEMBRANES
- MASS TRANSFER BETWEEN PARTICLES AND LIQUID IN DILUTE FLUIDIZED BEDS CONTAINING SMALL SIZE PARTICLES
- Significance of coal desulfurization from resource economics viewpoint
- Inactivation rate of Bacillus subtilis spores irradiated by ultraviolet rays.
- Kinetics of the gas-phase photochlorination of dichloromethane in a tubular photoreactor.
- Mass transfer between particles and liquid in solid-liquid two-phase upflow in vertical tubes.
- Direct determination of absolute light intensity in UV-transmitting and UV-dispersive fluoro polymer tubes.
- Average particle velocity in solid-liquid two-phase flow through vertical and horizontal tubes.
- Performance of annular flow sterilizer irradiated by a germicidal lamp.
- Correlation of mass transfer coefficient between particles and liquid in liquid fluidized beds.
- Mass transfer between particles and liquid in dilute fluidized beds in the low Reynolds number region.
- Correlation of liquid-side mass transfer coefficient for single particles and fixed beds.
- Axial dispersion of liquid in liquid fluidized beds in the low Reynolds number region.
- Mass transfer between particles and liquid in solid-liquid two-phase upflow in the low-velocity region through vertical tubes.
- Mass transfer between particles and liquid in solid-liquid two-phase flow through horizontal tubes.