Atomic Energy of Canada Limited

About: Atomic Energy of Canada Limited is a company organization based out in Ottawa, Ontario, Canada. It is known for research contribution in the topics: Zirconium alloy & Neutron. The organization has 4845 authors who have published 4826 publications receiving 102951 citations.

The effect of chronic and acute heat conditioning on the development of thermal tolerance

Abstract: Survival studies with Chinese hamster ovary cells showed that thermal tolerance, which developed during chronic heating (treatment times greater than or equal to 1 hr) or after acute heating (treatment times less than 1 hr) involves similar mechanisms. For example, cells that expressed thermal tolerance during a 6–14 hr chronic heat treatment at 41.5°C or 42°C also expressed thermal tolerance to a subsequent acute treatment at 45.5°C. Also, cells heated acutely for 10 min at 45.5°C and incubated at 37°C for 12 hr showed tolerance to both 45.5°C acute and 42°C chronic hyperthermia. Finally, thermal tolerance developed between fractionated acute heat treatments at 45.5°C and fractionated chronic heat treatments at 42.5°C. These data indicate that when cells are tolerant to chronic hyperthermia they are also tolerant to acute hyperthermia and that the reverse is also true.

Mode Responses of Dynamically Loaded Structures

Abstract: Instantaneous mode response of dynamically loaded elastic, viscous, ideally plastic and rigid, viscoplastic structures are defined and characterized by variational criteria with isometric constraints. Under some loading conditions, the instantaneous mode responses coincide with the natural mode solutions of those problems. For the case of a rigid, perfectly plastic problem, it is believed that the criterion for an instantaneous mode response would yield simultaneously the true limit load and the true collapse mechanism of the limit analysis. Examples of beams and plates of various materials subjected to uniformly distributed, rectangular pulse load or impulsive loading are given to illustrate the instantaneous mode responses which are then compared with exact solutions.