[Phot. des membres de la mission envoyée à l'île Saint-Paul pour y observer le passage de Vénus en 1874, don de Charles Vélain. Il s'agit en réalité de la reproduction d'un cliché offert par Ernest Mouchez à Auguste Daubrée]

Donateur : Daubrée, Auguste (1814-1896)

Metabolic effects of a mixed and a high-carbohydrate low-fat diet in man, measured over 24 h in a respiration chamber.

1. The relation between dietary carbohydrate: lipid ratio and the fuel mixture oxidized during 24 h was investigated in eleven healthy volunteers (six females, and five males) in a respiration chamber. Values of the fuel mixture oxidized were estimated by continuous indirect calorimetry and urinary nitrogen measurements. 2. The subjects, were first given a mixed diet for 7 d and spent the last 24 h of the 7 d period in a respiration chamber for continuous gas-exchange measurement. The fuels oxidized during 2.5 h or moderate exercise were also measured in the respiration chamber. After an interval of 2 weeks from the end of the mixed-diet period, the same subjects were given an isoenergetic high-carbohydrate low-fat diet for 7 d, and the same experimental regimen was repeated. 3. Dietary composition markedly influenced the fuel mixture oxidized during 24 h and this effect was still present 12 h after the last meal in the postabsorptive state. However, the diets had no influence on the substrates oxidized above resting levels during exercise. With both diets, the 24 h energy balance was slightly negative and the energy deficit was covered by lipid oxidation. 4. With the high-carbohydrate low-fat diet, the energy expenditure during sleep was found to be higher than that with the mixed diet. 5. It is concluded that: (a) the composition of the diet did not influence the fuel mixture utilized for moderate exercise, (b) the energy deficit calculated for a 24 h period was compensated by lipid oxidation irrespective of the carbohydrate content of the diet, (c) energy expenditure during sleep was found to be higher with the high-carbohydrate low-fat diet than with the mixed diet.

Traité d'anatomie humaine. Tome 1,Fascicule 2 / par MM. A. Charpy,... A. Nicolas,... A Prenant,... [et al.] ; publié sous la direction de Paul Poirier

Comprend : Les lymphatiques... Étude spéciale des lymphatiques des différentes parties du corps ; Système nerveux... Nerfs crâniens ; Les organes des sens. Le tégument externe et ses dérivés ; Oreille interne...

Traité d'anatomie humaine. Tome 3 / par MM. A. Charpy,... A. Nicolas,... A Prenant,... [et al.] ; publié sous la direction de Paul Poirier

Comprend : Les lymphatiques... Étude spéciale des lymphatiques des différentes parties du corps ; Système nerveux... Nerfs crâniens ; Les organes des sens. Le tégument externe et ses dérivés ; Oreille interne...

[Voyage en Italie : 1824-1830]. , [Préparatifs pour la fête des SS. Pierre et Paul ?] St Pierre de Rome, 28 juin : [face et deux profils d'une femme voilée, vue perspective d'une porte intérieure de la basilique ornée de guirlandes] : [dessin] / h. L. [Henri Labrouste]

Référence bibliographique : Weigert, 539

Changes in sleeping and basal energy expenditure and substrate oxidation induced by short term thyroxin administration in man.

The present study was designed to explore the thermogenic effect of thyroid hormone administration and the resulting changes in nitrogen homeostasis. Normal male volunteers (n = 7) received thyroxin during 6 weeks. The first 3-week period served to suppress endogenous thyroid secretion (180 micrograms T4/day). This dose was doubled for the next 3 weeks. Sleeping energy expenditure (respiratory chamber) and BMR (hood) were measured by indirect calorimetry, under standardized conditions. Sleeping heart rate was continuously recorded and urine was collected during this 12-hour period to assess nitrogen excretion. The changes in energy expenditure, heart rate and nitrogen balance were then related to the excess thyroxin administered. After 3 weeks of treatment, serum TSH level fell to 0.15 mU/L, indicating an almost complete inhibition of the pituitary-thyroid axis. During this phase of treatment there was an increase in sleeping EE and sleeping heart rate, which increased further by doubling the T4 dose (delta EE: +8.5 +/- 2.3%, delta heart rate +16.1 +/- 2.2%). The T4 dose, which is currently used as a substitutive dose, lead to a borderline hyperthyroid state, with an increase in EE and heart rate. Exogenous T4 administration provoked a significant increase in urinary nitrogen excretion averaging 40%. It is concluded that T4 provokes an important stimulation of EE, which is mostly mediated by an excess protein oxidation.