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  • 1990-1994  (2)
  • 1
    Electronic Resource
    Electronic Resource
    In Vitro digestibility of selected polymers (1994)
    Springer
    Journal of polymers and the environment 2 (1994), S. 245-251 
    Details
    ISSN: 1572-8900
    Keywords: In vitro digestibility ; biopolymers ; biodegradable polymers
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract In vitro digestibility of 10 polymers was studied. Only starch, starch blend, gelatin, and silk were more than 10% digested by the enzyme cocktail. Cellophane, polyhydroxy-β-valerate, pullulan, levan, shellac, ethylene vinyl alcohol, and polyethylene were less than 10% digestible. The implications from these data are that these materials would act physiologically as dietary fiber or residue.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02071972
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  • 2
    Electronic Resource
    Electronic Resource
    The effects of protein deficiency and fluoride on bone mineral content of rat tibia (1992)
    Springer
    Calcified tissue international 50 (1992), S. 157-164 
    Details
    ISSN: 1432-0827
    Keywords: Toxicity ; Fluorosis ; Acid-base status ; Magnesium ; Metabolism ; Photon absorptiometry
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine , Physics
    Notes: Summary This study examined the effects of chronic protein deficiency and fluoride administration (10 mg/kg/day), separately or in combination, on rat tibia properties. Protein deficiency increased the bone fluoride concentration and reduced the bone mineral content (BMC) especially at the proximal or growing end which contains mainly cancellous bone. Fluoride administration also reduced BMC, but to a lesser extent, and it resulted in proximal tibia fluoride concentrations that were nearly twice those of the distal tibia. The interaction between fluoride administration and the protein content of the diet on BMC was nonsignificant, suggesting that the effects were additive, not multiplicative or synergistic. Fluoride administration, but not protein deficiency, increased bone magnesium levels. It is hypothesized that the reduction in BMC in the areas where the fluoride concentrations were the highest was due to a localized toxic effect of fluoride.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00298794
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