McGill University Thèses et mémoires publiés en 1943

The author must apologize for the heterogeneous nature of the investigations to be reported. The original problem of investigating the nature of a charcoal surface by x-ray diffraction studies failed to develop along the anticipated lines and became rather a study of the mechanism and kinetics of the decomposition of nickel carbonyl on charcoal surfaces, which, however, did not seem to be justified under existing conditions of urgency. A study to which highest priority has been conceded, namely kinetics of formation of R.D.X, was undertaken therefore, concurrently with which a study was also made x-ray diffraction pictures of H.M.X. crystals …  Lire la suite

An apparatus of original design based on scattering of light by smoke was constructed to measure the penetration of smoke filters. Methods of obtaining a suitable testing cloud for use tn the e.pparatus were investigated. Various carbon smokes were investigated and the effects of several factors, involved in the production of these smokes, on the penetretion of' the filters were determined. An oleic acid smoke generator was constructed which yielded smokes of homogeneous particle size. The stabilty of various filters to this smoke was investigated. The optimum conditions for the Manufacture of rayon-asbestos filters were determined.  Lire la suite

Recent work on the structure of lignin has tended toconfirm those viewpoints emphasizing its essentially aromaticand phenolic character. This is by no means limited, amongnatural products, to lignin, but is found among the members ofseveral highly important classes of plant constituents such asthe essential oils, tne tannins, the plant pigments, the glycosides,as well as others.A brief outline of the type of natural phenols, theiroccurrence, as well as some details of special interest is givenhere [...]  Lire la suite