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  • 1
    Electronic Resource
    Electronic Resource
    Spiroergometric performance of children and adolescents with chronic renal failure (1991)
    Springer
    Pediatric nephrology 5 (1991), S. 22-28 
    Details
    ISSN: 1432-198X
    Keywords: Spiroergometric testing ; Physical performance ; aerobic capacity ; Lactate metabolism ; Chronic renal failure ; Dialysis ; Transplantation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Maximal physical performance (Wmax), maximal oxygen consumption ( $$\dot V$$ O2max), maximal carbon dioxide production ( $$\dot V$$ CO2max) and blood lactate (L) levels were measured in 34 paediatric patients with chronic renal failure (CRF) and 25 controls by spiroergometric testing on a bicycle ergometer. No patient was treated with erythropoietin. The workload was increased step-wise by 0.5 W/3 min up to a Wmax determined from the attainment of $$\dot V$$ O2max. In patients on conservative treatment (CT), on haemodialysis (HD) and after transplantation (TP) median Wmax per kilogram body weight was reduced to 76%, 73% and 73% of controls (C), respectively. In CT and HD patients $$\dot V$$ O2max and $$\dot V$$ CO2max were decreased to an even higher extent. The ventilatory anaerobic threshold, calculated from the levelling off of the respiratory equivalent $$\dot V$$ E/ $$\dot V$$ O2) during increasing workload, was only slightly higher in patients than in C when related to Wmax (NS). The physiological rise in L during exercise was blunted in CRF; 72% of patients on CT or HD did not exceed the expected threshold L level of 4 mmol/l; after TP the L changes normalized. The findings indicate that most children and adolescents with CRF are able to attain maximal physical performance but both the aerobic and the anaerobic capacity are often reduced. Preliminary findings indicate that treatment of renal anaemia with erythropoietin is able to considerably improve Wmax and $$\dot V$$ O2max in paediatric HD patients.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00852834
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Evidence of an aggregation pheromone in the flea beetle,Phyllotreta Cruciferae (Goeze) (Coleoptera: Chrysomelidae) (1992)
    Springer
    Journal of chemical ecology 18 (1992), S. 875-884 
    Details
    ISSN: 1573-1561
    Keywords: Aggregation pheromone ; olfactometer ; field trapping ; Coleoptera ; Chrysomelidae ; Phyllotreta cruciferae ; Brassica napus ; crucifer
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Laboratory olfactometer bioassays and field trapping experiments showed that the flea beetle,Phyllotreta cruciferae (Goeze), was highly attracted by oilseed rape(Brassica napus L.) when flea beetles were on the plant. This attraction was mediated by a flea beetle-produced aggregation pheromone based upon: (1) Oilseed rape damaged mechanically, or byP. cruciferae, or by diamondback moth,Plutella xylostella (L.), did not attractP. cruciferae. (2) Contact with the plants or feeding was required for the production of aggregation pheromone because oilseed rape alone was not attractive when separated from flea beetles by a screen. (3) Equal numbers of males and females were attracted.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00988328
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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