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In this paper, the case for the conservation of plants that have arisen in cultivation is provided and the mechanisms for extinction discussed, with examples. The approach to cultivated plant conservation over the past 30 years is reviewed and a basis for revising that approach explained. A new, far more comprehensive and rigorous method for priori...
A prospective study was conducted with the aims of 1) determining the normal trans-oxygenator pressure gradient characteristics for a range of oxygenators and 2) determining the characteristics, incidence and outcome of abnormally raised gradients. The trans-oxygenator pressure gradient was monitored in 3684 patients undergoing open-heart surgery i...
This paper presents the results of carburizing and carbonitriding studies carried out under laboratory conditions and also validated industrially. It is known that during heat treating processes, CO species are the source for carbon enrichment observed in treated parts and that H2 species tie up the nascent oxygen atoms that form at the surface. Th...