共查询到20条相似文献,搜索用时 15 毫秒
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Bile acid composition of bile from germ-free rabbits 总被引:1,自引:0,他引:1
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1. The study of the effect of bile salts on enhancing calcium absorption in the rachitic chick has been extended to bile salts not present in chick bile, e.g. glycine conjugates and bile alcohol sulphates. 2. Bile and bile salts cause an increase in calcium absorption from sparingly soluble calcium hydrogen phosphate when compared with a suspension of calcium hydrogen phosphate in saline. 3. If the bile ducts of normal rats are tied the absorption of calcium from calcium hydrogen phosphate decreases but can be restored by giving bile salts with the calcium salt. 4. Bile salts increase solubility in water of the sparingly soluble calcium salts, phytate and phosphate at pH values between 6 and 8. 5. Bile salts increase the solubility in lipid solvents of calcium in approximately the same proportion as they increase the absorption of calcium from the gut. 6. The physiological role of bile in calcium absorption and its mode of action are discussed. 相似文献
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Epileptiform seizures in domestic fowl 总被引:6,自引:0,他引:6
R D Crawford 《The Journal of heredity》1970,61(5):185-188
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F. Treilhou-Lahille F. Lasmoles J. Taboulet J. P. Barlet G. Milhaud M. S. Moukhtar 《Cell and tissue research》1984,235(2):439-448
Summary The ultimobranchial gland (UBG) of birds is particularly rich in calcitonin, the hypocalcaemic hypophosphataemic hormone, that is secreted by the C-cells of the mammalian thyroid. The principal cells of the UBG have a striking resemblance with the mammalian C-cells, i.e., they possess small intracytoplasmic dense-core secretory granules, 150–300 nm in diameter. The gland also contains a second, morphologically distinct, endocrine cell type with larger granules, 500–800 nm in diameter. A sensitive immunocytochemical reaction was developed with the use of antibodies against salmon calcitonin. By means of this technique the presence of calcitonin-immunoreactive molecules was demonstrated in both secretory cell types of the UB gland of the chicken. This gland can thus be considered as a homogeneous calcitonin-producing tissue. Whether the secretory products are identical is discussed and differences in the secretory pathways are suggested. 相似文献
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Frustration and aggression in the domestic fowl 总被引:2,自引:0,他引:2
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S Sell 《Journal of immunology (Baltimore, Md. : 1950)》1965,95(2):300-305
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