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  • 1
    Electronic Resource
    Electronic Resource
    Intestinal Calcium Binding Protein in the Diabetic Rat (1973)
    [s.l.] : Nature Publishing Group
    Nature 245 (1973), S. 327-328 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Table 1 Duodenal Calcium Binding Protein in Control and Diabetic Rats Groups, n=5 C D Mucosa, total wet weight (g) 3.6 4.2 Homogenate, total protein (mg) CaBP specific activity* 293 340 Homogenate 1.2 0.6 'Bio-Gel' P-100t 18.1 1.2 'Bio-Gel' P-10, first 40.8 2.9 ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/245327a0
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Effects of dietary protein on body weight, mucosal growth, and calcium absorption in the rat (1978)
    Springer
    Digestive diseases and sciences 23 (1978), S. 545-549 
    Details
    ISSN: 1573-2568
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Previous studies of dietary protein intake and calcium balance demonstrate decreased fecal calcium excretion with high-protein diets. To determine whether a duodenal or ileal calcium transport response could account for these findings, we examined calcium transport by these two segments directly byin situ perfusion. Weight-matched growing rats were pair-fed isocaloric diets for 6–8 days containing 89% protein (casein), 39% protein, or 0% protein. Sucrose was substituted for the decreased casein in the 39% and 0% protein diets. Each diet also contained 5% fat, a mineral mix, and vitamins. Calcium content of all diets was 0.5%. Body weight was maintained by the 39% protein group; weight loss was 5% for the 89% protein group and 18% for the 0% protein group. Smallintestinal weight as a percentage of body weight was the same for the three groups. For both the duodenum and the ileum, mucosal dry weight per centimeter was greater in the 39% protein group than either the 89% protein or 0% protein group. Calcium absorption per gram dry weight of mucosa (absorptive specific activity) was the same for all diet groups, but because of the greater mucosal weight per unit length in the 39% protein group, absorption per centimeter was increased in this group. In conclusion, although we found no direct relation between dietary protein and mucosal absorptive specific activity for calcium, calcium absorption was determined by the amount of mucosa which was dependent on protein intake and reflected the nutritional status of the body.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01072699
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  • 3
    Electronic Resource
    Electronic Resource
    Effects of casein and fibrin on calcium absorption and calcium homeostasis in the rat (1981)
    Springer
    Digestive diseases and sciences 26 (1981), S. 237-241 
    Details
    ISSN: 1573-2568
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract To test the hypothesis that individual proteins have specific effects on calcium absorption, two proteins, casein and fibrin, were pair-fed in diets to rats for 3 weeks. Each protein was fed at normal (1.2%) and low (0.02%) calcium intakes. Diets were matched in other nutrients. Calcium absorption, measuredin vitro as serosal-to-mucosal concentration ratio of45Ca developed by duodenal sacs, was the same for both protein groups when calcium intake was normal and was increased by both low-calcium diets. Comparing low-calcium diets, absorption was greater in fibrin-fed than casein-fed groups. Balance studies showed that casein-and fibrin-fed rats taking normal calcium diets excreted the same amounts of calcium and phosphorus in urine and feces. Fibrin-fed rats taking low calcium excreted twice as much calcium as casein-fed rats and had decreased serum calcium. The balance data suggest that, compared to casein, fibrin prevents absorption or promotes excretion of calcium when calcium intake is low, and the response to calcium depletion is enhanced calcium absorption. It is concluded that individual proteins can alter calcium transport through effects on overall calcium homeostasis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01391636
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    Paper (German National Licenses)
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