Zobrazeno 1 - 10
of 123
pro vyhledávání: '"Masaaki Takehisa"'
Autor:
Tsuneo Sasuga, Yoshishige Sato, Noriyuki Haneda, Yasuyuki Haruyama, Hiromi Sunaga, Masaaki Takehisa
Publikováno v:
Radiation Physics and Chemistry. 76:1619-1623
Radix W, a clear poly(methyl-methacrylate) (PMMA) dosimeter was developed with improved properties compared to the conventional clear PMMA dosimeter, Radix RN15. PMMA with a glass transition temperature ( T g ) higher than 120 °C was selected making
Autor:
Mitsuo Chino, Tamikazu Kume, Masaaki Takehisa, Tomio Inoue, Seiichi Tagawa, Masahiko Shimizu, Keizo Makuuchi, Miyuki Hagiwara, Kazuaki Yanagisawa
Publikováno v:
Journal of Nuclear Science and Technology. 39:1120-1124
In modern times, the use of nuclear energy and radiation are inseparable. The size of two wheels can be measured and compared by the term economic scale, which in this case refers to the revenue of electricity at terminal and production costs associa
Autor:
Yoshishige Sato, Hiroshi Watanabe, Hajime Seitou, Masaaki Takehisa, Takuji Kojima, Tatsuya Ichikawa
Publikováno v:
FOOD IRRADIATION, JAPAN. 45:1-3
International standard (ISO) of radiation sterilization and issues in the sterilization dose setting
Autor:
Masaaki Takehisa
Publikováno v:
Radiation Physics and Chemistry. 46:1349-1352
The ISO dose setting method 1 uses bioburden and verification by sublethal sterility test. Current devices produced in clean environment have low bioburden, however, sensitivity of verification test declines at low bioburden. Validation of verificati
Publikováno v:
Radiation Physics and Chemistry. 42:621-624
Radiation sensitivities of B . pumilus and B. subtilis spores were examined to bremsstrahlung of 5 MeV EB and Cobalt -60 γ rays in order to confirm the effects of radiation and dose rate. Biological indicators (SPORTROL, NAmSA, USA) were irradiated
Publikováno v:
Radiation Physics and Chemistry. 42:789-792
Graphite and water calorimeters, which were developed for use a 10 MeV electron beams (EB) at Riso National Laboratory, were used for process validation and routine dosimeter calibration at a 5 MeV EB. Water calorimeters were used for reference measu
Publikováno v:
Radiation Physics and Chemistry. 42:495-498
A contract electron beam(EB) and bremsstrahlung(X-ray) facility with use of NHV 5 MeV, 30 mA Cock-Croft Walton machine is operational for EB since April 1991, and X-ray commercial irradiation was started in 1992 summer. The facility is consisted of t
Autor:
Masaaki Takehisa
Publikováno v:
Radiation Physics and Chemistry. 46:293-295
The international standard (ISO) of radiation sterilization recommends dose setting methods using sublethal verification sterility test at SAL (Sterility Assurance Level) of inverse sample size (n). An acceptance probability of the verification is lo
Publikováno v:
Journal of Polymer Science: Polymer Chemistry Edition. 14:2575-2585
Irradiation of sodium allylsulfonate in aqueous solution at high pressure (up to 9000 kg/cm/sup 2/) gave a deliquescent white powder which is insoluble in organic solvent. The product was addition polymer of allylsulfonate from the high-resolution NM
Publikováno v:
The Journal of Physical Chemistry. 83:3290-3293
Pressure-volume (P-V) measurement and radiation-induced polymerization of styrene were studied up to 6000 kg/cm/sup 2/ at 40/sup 0/C. The specific volume changed abruptly at 2000 kg/cm/sup 2/ in the P-V isotherm of the monomer. A Van't Hoff plot of t