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  • Chemistry  (2)
  • Inhibitors  (2)
  • 1
    Electronic Resource
    Electronic Resource
    The influence of hydroxyapatite and pyrophosphate on the formation product of calcium oxalate at different pHs (1989)
    Springer
    Urological research 17 (1989), S. 153-155 
    Details
    ISSN: 1434-0879
    Keywords: Calcium oxalate ; Heterogeneous nucleation and growth ; Inhibitors ; Pyrophosphate ; Hydroxyapatite
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The nucleating effect of hydroxyapatite (HAP) and the inhibitory effect of pyrophosphate (PPi) on calcium oxalate crystallization have been studied at different pH's in solution metastabely supersaturated with respect to calcium oxalate but saturated with respect to HAP. Crystallization was monitored by a decrease of calcium in the supernatant and formation products were calculated. At a pH above 6.0 already minimal HAP concentrations proved to be a suitable substrate for heterogeneous nucleation and growth of calcium oxalate. PPi showed a pronounced inhibitory effect on spontaneous as well as on HAP induced crystallization of calcium oxalate, this effect being highly pH dependent. HAP was found to neutralize the inhibitory effect of PPi in a molar ratio of 10:1.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00256242
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Rapid method of measuring the inhibition of calcium-oxalate monohydrate growth in urine (1990)
    Springer
    Urological research 18 (1990), S. 219-222 
    Details
    ISSN: 1434-0879
    Keywords: Inhibitors ; Calcium-oxalate monohydrate growth ; Pyrophosphate ; Citrate ; Urine
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary In order to have a rapid method of measuring the inhibition of calcium-oxalate monohydrate growth in freshly voided whole urine, a test system by Meyer and Smith that has originally been developed for diluted urine was modified. The crystallization processes were monitored by an ion-selective calcium electrode, which allowed determination of the half-life value of the decrease in calcium within 25 min. Even given the high inhibitory activity of whole urine, the test gave reliable results when a high seed concentration was used. Inhibition was expressed as the ratio between the half-lives of the calcium decrease obtained in the presence and in the absence of inhibitors. This approach allowed kinetic studies of individual inhibitors in model solutions. Furthermore, the measurements of inhibitors in urine could be, performed before the chemical composition was determined.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00295851
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Über den Mytilit, eine natürlich vorkommende Cyclose (1921)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 54 (1921), S. 1938-1943 
    Details
    ISSN: 0365-9631
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19210540822
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Das Trimethylamin-oxyd als biologischer Wasserstoff-Acceptor (1926)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 59 (1926), S. 2750-2751 
    Details
    ISSN: 0365-9631
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19260591112
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    Paper (German National Licenses)
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