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  • 1
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 233 (1971), S. 469-471 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The purpose of this letter is to question the proposed association between radio spurs and soft X-ray emission in general and to take issue with the particular identification of soft X-ray emission observed by Bowyer et al. with the North Polar Spur. The main points of our argument are that an ...
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Digestive diseases and sciences 15 (1970), S. 637-646 
    ISSN: 1573-2568
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract A series of recent observations on different aspects of the chemistry and metabolic actions of bile have led us to investigate the possibility that bile may induce pancreatitis through the physicochemical detergent properties of its salts. To determine the relative importance of proteolytic enzymes on the one hand, and the detergent action of bile on the other, in the pathogenesis of bile-induced experimental pancreatitis in the dog, the early morphologic changes (1–30 min) produced by the intraductal injection of the following substances were investigated: (1) autogenous bile; (2) bile salt; (3) an anionic detergent, sodium lauryl sulfate (SLS); (4) trypsin; (5) a cationic detergent, cetrimide; (6) a neutralized mixture of SLS and cetrimide; and (7) saline solution. Autogenous bile, bile salts and SLS produce pancreatitis of similar morphologic appearance, characterized by punched-out areas of coagulation necrosis. Trypsin-induced pancreatitis was distinctly different from that produced by bile, bile salts and SLS. In trypsin pancreatitis, irregular areas of necrosis and hemorrhage were seen. Inactivation of the detergent activity of SLS by mixing it with the cationic detergent, cetrimide, reduced the capacity of SLS to induce pancreatitis similar to that induced by bile and bile salts. These data seem to indicate that the early phases of bile-induced pancreatitis in our experiments are unlikely to result from the liberation of trypsin, but are related instead to the detergent activity of bile salts.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Cell & tissue research 146 (1973), S. 237-242 
    ISSN: 1432-0878
    Keywords: Antral transplantation ; Enterochromaffin cells (dog) ; Gastric hyperacidity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary A previous examination, done by others, of the endocrine cells of the canine pyloric antrum following its transplantation to the colon evidenced an increase in their number; the cell types involved, however, were not individualized. The present study further characterizes the changes occurring in the endocrine cells of the pyloric antrum of dogs following transplantation to the colon. The main change observed consists of hyperplasia of the enterochromaffin cells, with minor qualitative modifications in the antral gastrin-producing cells being noted only by electron microscopy. The response of the enterochromaffin cells cannot be readily explained but might be related to similar enterochromaffin cell hyperplasias found in human stomachs with peptic ulcers. Antrum transplantation to the colon in dogs appears to provide a promising experimental model for the study of the relationship between gastrin and other humoral factors (probably biogenic amines) in the mechanism of gastric secretion under normal as well as abnormal circumstances.
    Type of Medium: Electronic Resource
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