Radiation sterilization.

E M DARMADY; K E HUGHES; M M BURT; B M FREEMAN; D B POWELL

doi:10.1136/jcp.14.1.55

Home/Archive/PubMed

PubMed · 13719781

Radiation sterilization.

E M DARMADY·K E HUGHES·M M BURT·B M FREEMAN·D B POWELL

View original source ↗Export metadata ↓

Abstract

The sterilization by radiation of disposable medical items has been investigated. Various vegetative and spore-bearing bacteria have been irradiated and results indicate that 2.5 Mrad can be recommended to give a high degree of sterility. Spores of B. pumilus (E.601) showed such resistance that it might be a suitable test organism for determining the efficiency of a radiation treatment. A high standard of packaging must be demanded for pre-sterilized products.

Explore related subjects

Radiation Spores, Bacterial Sterilization RADIATION STERILIZATION Journal Article

Keep this discovery

Explore connections, maps & timelines

BibTeX RIS

E M DARMADY, K E HUGHES, M M BURT, B M FREEMAN, D B POWELL. 1961. Radiation sterilization.. https://doi.org/10.1136/jcp.14.1.55

Cite the original work for its findings. Save a collection to share your selection of sources.

KEEP EXPLORING

Related citations

PubMed1992

[Solar radiation--physicochemical aspects].

The solar radiation spectrum and the properties of its components are studied in the present paper. The history of the sun rays before reaching earth surface is analysed. A simplified analysis of the interaction mechanisms of these components with molecules, the energy absorption capabilities of the latter and the expected biological consequences are considered. Special emphasis are given to the properties of ultra-violet and infra-red radiations and their production considered.

Radiation↗

PubMed1991

Self-irradiation effect on yeast cells.

The effect of self irradiation on yeast cells has been investigated by counting the young gemmae formation in 104 self irradiated samples, as compared with an equal set of control samples. The results show that the rate of gemmae formation is higher in self irradiated samples; the statistical significance of the results is discussed.

Radiation↗

PubMed1989

Compton spectroscopy in the diagnostic x-ray energy range. II. Effects of scattering material and energy resolution.

The overall performance of a Compton spectrometer and, in particular, its energy resolution are investigated both experimentally and theoretically for different scattering materials. Using low-Z (less than or equal to 8) scatterers of moderate sizes (scatterer diameter d less than or equal to 5 mm), there are negligible disturbances due to coherent and/or multiple scattering at 90 degrees scattering angle and photon energies above 20 keV. Two factors contribute to decreasing the energy resolution compared with that in direct measurements: (i) the velocity distribution of the electrons in the scatterer and (ii) the scattering geometry. Of these, (i) is dominant for photon energies less than or equal to 100 keV. The optimal scattering material is a metal of as low Z as possible, i.e. beryllium. However, polyethylene and lucite are normally sufficiently good scatterers. The scattering geometry may become the dominating factor decreasing energy resolution at high photon energies hv greater than or equal to 150 keV.

Radiation↗