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  • 1
    Electronic Resource
    Electronic Resource
    Changes in isometric function following rhythmic exercise (1985)
    Springer
    European journal of applied physiology 54 (1985), S. 177-183 
    Details
    ISSN: 1439-6327
    Keywords: Cycle ergometry ; Isometric exercise ; Muscle strength ; Muscle endurance
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Seven male subjects exercised for 1, 3, 10 and 20 min on a cycle ergometer at 20, 60 and 80% $$\dot V_{O_{2\max } } $$ , and then held to fatigue a sustained contraction of the quadriceps at 40% maximal voluntary contraction in order to determine what influence various levels of dynamic exercise would have on isometric function of the same group of muscles. Muscle temperature was measured before and within 15 s of the completion of the cycling to determine whether changes in muscle temperature might influence the subsequent isometric perormance. Isometric endurance was shorter as the severity of the cycling increased beyond 20% $$\dot V_{O_{2\max } } $$ , and as the duration of cycling increased up to 10 min. There were discrete linear relationships between muscle temperature and isometric endurance associated with cycling at 60% and 80% $$\dot V_{O_{2\max } } $$ . There was a direct inverse relationship between quadriceps strength after cycling and muscle temperature, yet a significant reduction in strength occurred only after cycling at 80% $$\dot V_{O_{2\max } } $$ . These results suggest that the encroachment on endurance and strength are controlled by different mechanisms. The heart rates during the isometric contractions were dependent on the preceding rhythmic exercise and decreased after exercise at 60 or 80% $$\dot V_{O_{2\max } } $$ . In contrast, the blood pressure always increased during the isometric contractions, reaching similar values at the point of fatigue, regardless of the severity of the previous rhythmic exercise. These data provide additional evidence that separate mechanisms control changes in heart rate and blood pressure.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02335926
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  • 2
    Electronic Resource
    Electronic Resource
    Activity persistence of granulosis viruses [Baculoviridae] in soils in United Kingdom and Denmark (1988)
    Springer
    BioControl 33 (1988), S. 73-80 
    Details
    ISSN: 1573-8248
    Keywords: Baculovirus ; Persistence ; Pieris brassicae ; Agrotis segetum ; Baculovirus ; persistance ; Pieris brassicae ; Agrotis segetum
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Description / Table of Contents: Résumé La persistance d'activité du virus de la granulose dans le sol a été étudiée. Le virus répandu sur le sol a été extrait à différentes époques jusqu'à un an après l'application initiale et la quantité de virus a été déterminée au moyen de tests biologiques. Dans cette optique, le contenu des capsules infectieuses restantes fut déterminé. On a montré que 99% environ de l'activité originale du virus était perdue au cours d'une année. Ce résultat joint à d'autres recherches montre que le lessivage, les mouvements passifs latéraux et la dégradation sont les principaux responsables de cette perte.
    Notes: Abstract The persistence of granulosis virus infectivity in soil has been investigated. Virus applied to soil was extracted at different times up to 1 year after the original application and the amount of virus was determined using bioassays. In this way the content of infective capsules remained was determined. It was shown that about 99% of the original virus infectivity was lost during 1 year. Together with other investigations this result indicates that leaching, passive lateral movements and degradation accounts for the main part of the loss.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02372315
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    Paper (German National Licenses)
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