This study examines the effect of routine gamma radiation based on cobalt 60 on the viability, mosquito larvicidal activity, and density of bacillus spores in the soil. Although 1 g of unirradiated powder of Bacillus thuringiensis israelensis (Bti) contains on average 6.2 x 10(9) spores, no spores survived radiation doses of 20.6 kGy and higher. Radiation at a dose of 20-25 kGy caused a 20-30% ...

The application of agarose in hemoperfusion is hampered by the lack of a suitable sterilization method. A technique has been developed for the crosslinking of agarose encapsulated sorbents by the reaction with 1,3-dichloro-2-propanol (DCP) under strong alkaline conditions. A twofold molar excess of DCP with respect to agarose and an equimolar amount of sodium hydroxide at a concentration of 0.3...

This paper aimed at the conception and implementation of a platform videogame designed to make known some benefits use Gamma Radiation produced in Cobalt-60 Multipurpose Irradiator, built with Brazilian technology IPEN’s facilities. Unity 3D game engine other free softwares for image edition were used. Four missions await player, illustrating following gamma radiation irradiation: on foods beve...

The globulin content of the standard solution in the vials is standardized either by a Kjeldahl or a biuret determination. When available Lederle (gamma) globulin diluted 1:200 can be used for this purpose as well. The diluted Lederle standard globulin coagulates on heating and so cannot be used as a sterilized standard. An interesting phenomenon was observed while preparing the sterilized wate...

Catalase present in the suspending medium during irradiation significantly reduced the lethal action of gamma radiation from cobalt6O for anaerobic bacterial spores. This finding supports the theory that the lethal action of ionizing radiations is at least partially due to secondary effects of the irradiation. Furthermore, such protection of anaerobic bacterial spores is important when steriliz...

Bioprosthetic valves created from chemically treated natural tissues such as bovine pericardial biomaterial are used as heart valve scaffolds. Methods currently available for sterilization of biomaterial for transplantation include the application of gamma radiation and chemical sterilants. These techniques, however, can be problematic because they can be expensive and lead to a reduction in ti...

Although polyethylene wear particles have been implicated in osteolysis and implant loosening, this study is the first to test whether chemical eluates extracted from ultra-high molecular weight polyethylene (UHMWPE) could also be involved in this process. Eluates were prepared from UHMWPE bar stock and examined for their effects on (3)H-thymidine incorporation by human foreskin fibroblasts gro...