Public health impact of a snow disaster.
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The amount of injured snowboarders is increasing each year. The reason is due to the success of snowboarding for teenagers. Accidents occur more during the first hours of practice. Upper limb is the first location: fore-arm breaks and wrist fractures are very common. Elbow and shoulder dislocations also occur often for snowboarders. The location of most injuries for lower leg is the ankle; we found many ankle sprains and astragalus's breaks. The knee sprain is rare unlike alpine ski. Prevention has to be developed to give a better image of this sport, in fact the attitude of the participants is the main reason for the accidents.
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Localizations of collagen types I, III, and V in monkey liver, as determined by the indirect immunofluorescence method, were photographically superimposed on the fibers revealed by silver-staining in the same tissue sections. Immunofluorescence for type I collagen was found to correspond with the brown collagen fibers and with some of the coarse reticular fibers, while that for type III collagen was found to correspond with most, but not all, reticular fibers of the liver as well as with the brown collagen fibers. The distribution of type V collagen coincides not only with the collagen fibers in the stroma of portal triads and around the central veins, but also with the coarse and fine reticular fibers in the liver lobules. By immuno-electron microscopy, reaction products with anti-type III and V collagens antibodies were demonstrated on cross-striated collagen fibrils, about 45 nm in diameter, in the space of Disse. From these observations, it is concluded that: (1) the fine reticular fibers are mainly composed of type III and type V collagens, and (2) the collagen fibers and coarse reticular fibers in the periphery of liver lobules are composed of type I, type III and type V collagens.
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