Bone Mineral Content and Physical Activity

in International Journal of Sports Medicine (1987), 8(5), 331-5

The purpose of this study was to estimate the effects of intense and regular physical activity on locomotor system modifications. Tennis, with its unilateral solicitations, allows a more precise ... [more ▼]

The purpose of this study was to estimate the effects of intense and regular physical activity on locomotor system modifications. Tennis, with its unilateral solicitations, allows a more precise examination of specific localized development. Ten professional tennis players were compared with sedentary age-matched students. Muscular modifications were observed, mainly in the forearm circumference. The dominant side forearm circumference was 13% larger than the opposite side. Asymmetry was less in the upper arm and insignificant in the thorax and vertebra. Deep modifications in bone mineral content (BMC) were investigated by isotopic techniques, based on differential photon attenuation in bone and soft tissue of the forearm. Bone density was markedly increased in professional tennis players. Even in the nondominant side, radius BMC was 1.18 g HA/cm, 15% higher than in sedentary control students. The difference was yet larger in the dominant mid-radius, reaching 1.47 g HA/cm. The same differences were observed for the ulna and involved both cortical and trabecular bone. In the control group of sedentary students, no significant difference was noted between the two upper limbs. This study clearly demonstrates the positive correlation between exercise and bone mineralization. The precise mechanical constraints optimizing the favorable effect in the most efficient way should be studied. [less ▲]

Moment rotation curves for bolted connections

in Journal of Structural Engineering (1987), 113(N°10), 2324-2329

Grandes déformations élastoplastiques et problèmes de contact lors du magnétoformage de bielles de transmission

in Revue Générale de l'Electricité (1987), 9

Architectural and Behavioural Modelling in Computer Communication

in Barton, M.; Dagless, E.; Reijns, G. (Eds.) Distributed Processing (1987, October)

Effets circulatoires et respiratoires de la ketamine chez le cheval anesthésie à l'halothane

in Canadian Journal of Veterinary Research = Revue Canadienne de Recherche Vétérinaire (1987), 51(4), 513-6

Ketamine (0.3 mg/kg) administered intravenously to 12 halothane anesthetized horses caused a significant respiratory depression during ten minutes when respiration was spontaneous. Significant hemodynamic ... [more ▼]

Ketamine (0.3 mg/kg) administered intravenously to 12 halothane anesthetized horses caused a significant respiratory depression during ten minutes when respiration was spontaneous. Significant hemodynamic effects were not observed except for cardiac index. Clinical application was also discussed. [less ▲]

Neuroanatomical Distribution of Testosterone-Metabolizing Enzymes in the Japanese Quail

in Brain Research (1987), 422(1), 137-48

We describe a very sensitive and precise assay which allows one to study the metabolism of testosterone (T) in small brain nuclei dissected out according to the method of Palkovits and Brownstein. With ... [more ▼]

We describe a very sensitive and precise assay which allows one to study the metabolism of testosterone (T) in small brain nuclei dissected out according to the method of Palkovits and Brownstein. With this method, the neuroanatomical distributions of aromatase, and 5 alpha- and 5 beta-reductase activities were studied in adult male quail (Coturnix coturnix japonica). The different enzymes show different neuroanatomical distributions. Production of estradiol-17 beta (E2) was highest in the sexually dimorphic nucleus preopticus medialis (POM). We showed previously that the preoptic aromatase activity is higher in male than in female quail. As the POM is a central and very large structure within the preoptic area, the present results suggest a relationship between the neuroanatomical and the biochemical sex differences. By contrast, the production of 5 alpha-DHT was highest in the lateral hypothalamic area (LHY), the bed nucleus of the pallial commissure (BPC) and the lateral septum (SL). The 5 beta-reductase activity was highest in the lateral septum and in the ventral part of the archistriatum (AV). Moreover, there was a rostral to caudal decrease in 5 beta-reductase activity in the hypothalamus. [less ▲]

Early prognostic index and late exercise test comapred in survivors from acute myocardial infarction

Poster (1987, September 05)

Serum creatine kinase isoenzymes and isoforms as indictors of coronary reperfusion in acute myocardial infarction

Conference (1987, September 05)

Narrow-band photometry of Comet P/Giacobini-Zinner at the time of ICE encounter

in Diversity and Similarity of Comets (1987, September 01)

Narrowband multidiaphragm photometry of comet Giacobini-Zinner, obtained shortly after ICE passed behind the comet's nucleus is summarized. Derived fluxes are presented, and Haser model production rates ... [more ▼]

Narrowband multidiaphragm photometry of comet Giacobini-Zinner, obtained shortly after ICE passed behind the comet's nucleus is summarized. Derived fluxes are presented, and Haser model production rates are given for each night data. The comet appears to be an exception to the production rate-heliocentric distance relation. [less ▲]

High Resolution Spectroscopy and Analysis of the C[SUB]2[/SUB](0,0) Band in Comet P/Halley

in Bulletin of the American Astronomical Society (1987, September 01)

Not Available