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  • 1
    Electronic Resource
    Electronic Resource
    Experimental technique simulating oxalocalcic renal stone generation (1993)
    Springer
    Urological research 21 (1993), S. 95-99 
    Details
    ISSN: 1434-0879
    Keywords: Calcalogenecis ; Oxalocalcic renal stone ; Calcium oxalate monohydrate ; Calcium oxalate dihydrate ; Stone development
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary A new technique simulating some of the conditions experienced by papillar and caliceal oxalocalcic stones during the early stages of their generation was developed. This technique enables the study of how conditions prevailing at calculogenesis, such as pH, composition of urine and presence of admixtures, influence the rate of formation and development, the crystalline texture and the composition of the concretion formed. Results achieved with this technique demonstrate that: (1) an appropriate substrate always gives rise to a crystalline concretion if it is in contact with supersaturated urine; (2) primary agglomeration plays a significant role in concretion development whereas secondary agglomeration is of minor importance; and (3) citrate and pyrophosphate exert a considerable influence on the shape and composition of particles constituting the concretion.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01788826
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Renal Stone Formation and Development (1999)
    Springer
    International urology and nephrology 31 (1999), S. 591-600 
    Details
    ISSN: 1573-2584
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract A concise account of formation mechanisms of attached (papillary) and unattached renal stones is presented. Urinary conditions prevailing at least during the stone forming period are indicated. Ten main categories of renal stones, covering over 95% of all conceivable calculi, are distinguished based on their composition and structure. Aetiologic factors leading to stone formation of every category are specified and general outlines of recommended treatment procedures indicated.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1007196102469
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Concentration gradients in supersaturated solutions: A thermodynamic analysis (1991)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 37 (1991), S. 490-498 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: The development of a concentration gradient along the vertical axis of a column of quiescent solution is explained within the framework of nonequilibrium thermodynamics. The formulae derived enabled us to determine explicitly the concentration difference between two vertical levels in a liquid column and specific conditions under which the concentration profile is at equilibrium. The concept of solute cluster formation in a supersaturated solution is consistent with the presented theory although the theory itself does not provide any direct or indirect proof of the occurrence of clustering.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690370403
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    Paper (German National Licenses)
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