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  • Amino-acids  (1)
  • ESWL  (1)
  • Firm size  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Damaging effects of high energy shock waves on cultured Madin Darby Canine Kidney (MDCK) cells (1990)
    Springer
    Urological research 18 (1990), S. 255-258 
    Details
    ISSN: 1434-0879
    Keywords: ESWL ; Shock waves ; MDCK cells ; LDH ; GOT
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Shock wave lithotripsy (ESWL) has become an almost non-invasive standard treatment modality for urolithiasis. Several investigations, however, demonstrated that ESWL is not completely free of side effects. Among others alteration of renal tubular function has been reported. To study the effect of shock waves on tubular cells directly an in-vitro model with cultured Madin Darby Canine Kidney (MDCK) cells was established. Suspensions of MDCK cells (7 groups of 6 containers each) were exposed to 0, 16, 32, 64, 128, 256 shock waves (Dornier HM4, 18 kV). Before and 0, 1, 3, 6, 9, 12, 24 h after ESWL the following parameters were measured in the nutrient medium: lactate dehydroxygenase (LDH), glutamate oxalacetate transaminase (GOT), electrolytes. LDH and GOT increased depending on the number of shock waves indicating a membrane damage of MDCK cells. The MDCK model seems suitable for further studies on the effect of shock waves on renal tubular cells.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00294768
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Growth, free plasma and muscle amino-acids in uraemic rats fed various low-protein diets (1991)
    Springer
    Pediatric nephrology 5 (1991), S. 318-322 
    Details
    ISSN: 1432-198X
    Keywords: Diet ; Protein ; Uraemia ; Rat ; Growth ; Amino-acids ; Keto-acids
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The nutritional effects of low-protein diets are difficult to assess in humans. Normal and uraemic growing rats were therefore fed: a moderately low-protein (12%) reference diet (diet R), two 5% casein diets, one supplemented with essential amino acids (AA) (diet A) and the other with their keto acids (diet K), and a 7% casein diet isonitrogenous with diet K (diet L). Appetite and growth of both uraemic and control rats were identical on diets R and A and were reduced on diets K and L. Stunting was prominent in rats fed diet L and more severe than in those on diet K. Diet K induced marked anorexia in controls. This effect was smaller in uraemic rats, which were all anorectic, regardless of the diet. Plasma essential AA were similar in rats on diets R and A but low in control rats fed diets L and K. In particular, diet K did not improve the branchedchain AA levels although it produced better growth than diet L. Plasma and muscle threonine were surprisingly elevated in rats on the semi-synthetic diets A and K, despite identical or lower consumptions. Regardless of the diet, uraemia resulted in unchanged or increased plasma essential AA, despite reduced appetite and stunting. Uraemia caused a marked rise in some non-essential AA. Muscle essential AA, except for threonine, were essentially unaltered and did not correlate with growth or uraemia.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00867491
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Employment growth and innovation at the firm level (1993)
    Springer
    Journal of evolutionary economics 3 (1993), S. 153-159 
    Details
    ISSN: 1432-1386
    Keywords: Innovation ; Product-related R&D ; Employment growth ; Firm size ; Information technology ; O33 ; J23 ; C23
    Source: Springer Online Journal Archives 1860-2000
    Topics: Economics
    Notes: Abstract We analyze the influence of innovation on growth rates of employment in 859 Dutch manufacturing firms over the period 1983–1988. Whereas the (growth of the) R&D intensity of firms has a slightly negative impact on employment, we find that firms with a high share of product-related R&D (as a proxi of R&D related to industrial activities in an early stage of the life cycle) experienced an above average growth of employment. The same holds for firms which directed their R&D towards information technology. Smaller firms have, ceteris paribus, substantially higher growth rates of employment than their larger counterparts. Against our expectations, R&D cooperation has no significant impact on employment growth. The same holds for activities in the fields of biotechnology and new materials.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01213832
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    Paper (German National Licenses)
    Fulltext
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