Hypertension and pregnancy

in Acta Cardiologica (1977), 32

Différences socio-culturelles et éducation optimisée en milieu scolaire (2 à 7-8 ans) : de la stimulation compensatoire à une pédagogie rénovée

Book published by Fondation B. Van Leer (1977)

Accurate photodensitometric measurement of the lecithin: sphingomyelin ration after elimination of the acidic phospholipids from extracts of amniotic fluid specimens.

in Clinica Chimica Acta (1977), 81(2), 209-14

Treatment of human amniotic fluid lipids dissolved in a chloroform/methanol (9:1, v/v) mixture by batchwise addition of diethylaminoethyl cellulose in a dry state proved to be an easy and rapid procedure ... [more ▼]

Treatment of human amniotic fluid lipids dissolved in a chloroform/methanol (9:1, v/v) mixture by batchwise addition of diethylaminoethyl cellulose in a dry state proved to be an easy and rapid procedure for the removal of the acidic phospholipids which may interfere in the photodensitometric evaluation of the lecithin: spingomyelin ratio on a thin-layer chromatogram. This method was used for the measurement of the lecithin: sphingomyelin ratio in a series of normal and abnormal pregnancies. Ratios higher than expected from gestational age were observed in stressed pregnancies. A significant elevation of the ratio was also observed under treatment by dexamethasone [less ▲]

The mechanics of the gravid uterus. II. Global myometrial activity and its pharmacology

in Revue Médicale de Liège (1977), 32(12), 369-77

Quelques réflexions face aux grands centres commerciaux belges

in Sporck J.A. (Ed.) Urbanisme commercial et rénovation urbaine (1977)

Five questions relating to shopping centers in Belgium

Sentiment du phonème et omission des voyelles nasales chez Port-Royal

in Stéfanini, J.; Joly, A. (Eds.) La grammaire générale des Modistes aux Idéologues (1977)

Evaluation des effets d'un vetement refroidissant sur l'adaptation aux efforts prolonges realises a haute temperature par des ouvriers mineurs.

in Revue de l'Institut d'Hygiène des Mines (1977), 32(3), 99-122

In order to improve the working conditions of coalminers exposed to high ambient temperature, the authors have studied the effects of wearing an under-vest and a cowl covering the head and shoulders made ... [more ▼]

In order to improve the working conditions of coalminers exposed to high ambient temperature, the authors have studied the effects of wearing an under-vest and a cowl covering the head and shoulders made in sponge-cloth and soaked with cold water (cooling clothes). Eight coalminers volunteered for this study which included three sessions of prolonged intermittent exercise performed in a climatic room with the following ambient temperatures:--experiment A (comfortable environment): td = 28 degrees C; twb = 20 degrees C; bare head and bare torso;--experiment B (hot environment) :td = 38 degrees C; twb = 30 degrees C; bare head and bare torso;--experiment C (hot environment and cooling clothes) : td = 38 degrees C; twb = 30 degrees C; wet undervest and cowl soaked with cold water (16 degrees C) every 15 minutes. Each experiment included 5 periods of exercise each lasting 15 minutes separated by periods of rest lasting 15 minutes; the exercises were performed on a bicycle ergometer or on a treadmill and their intensity corresponded to 50% of the maximal oxygen intake. In the comfortable environment (experiment A), all subjects completed the experiment without undue fatigue; the final heart rate was 81/min and the final rectal temperature was 37.6 degrees C; the weight loss never exceeded 1 Kg. In the hot environment (experiment B), all subjects were exhausted at the end of the study which had to be shortened in 2 cases. The final heart rate was 125/min and the final rectal temperature 38.8 degrees C; the weight loss was above 2 Kg. The use of the "cooling clothes" in the hot environment (experiment C) resulted in significantly (p less than 0.001) lower heart rate (104/min), rectal temperature (38.3 degrees C) and weight loss (1.5 Kg); all subjects completed the experiment, none was exhausted and the "cooling clothes" were appreciated by all subjects. We conclude that the "cooling clothes" tested in the present study significantly reduce the physiological and subjective strain due to intermittent work in a hot environment; this cooling system is simple, of low cost and our results indicate that it is will be very useful in climatic conditions similar to those adopted in the present experimental protocol. Its usefulness in less severe climates has to be established but it might be limited by the subjective reactions of the subjects to the transient but sudden sensation of cold given by the "cooling clothes". [less ▲]

Contribution to spectral line formation in moving stellar envelopes - Radiation field and statistical equilibrium equations

in Astronomy and Astrophysics (1977), 60

The escape probability method introduced by Sobolev (1947) is used to derive the mean intensity of the radiation field at any point of an envelope which expands spherically with a positive or negative ... [more ▼]

The escape probability method introduced by Sobolev (1947) is used to derive the mean intensity of the radiation field at any point of an envelope which expands spherically with a positive or negative radial-velocity gradient. When considering outward-decelerating envelopes, an additional contribution to the mean intensity of the radiation field must be taken into account when compared with the results obtained by Castor (1970) in the case of outward-accelerating envelopes. A general discussion of the net radiative rates which populate the levels of an atom relates the problem of spectral-line formation in a moving medium to the one in a transparent atmosphere at rest. Namely, it is shown that dilution effects are expected to play an important role in envelopes where very large velocity gradients occur. [less ▲]

Recherche et Etude de mutants thermosensibles chez Saccharomyces cerevisiae, affectés dans la biosynthèse des Acides Ribonucléiques

in Revue des Fermentations et des Industries Alimentaires (1977), (32), 3-15

Recherche et Etude de mutants thermosensibles chez Saccharomyces cerevisiae, affectés dans la biosynthèse des Acides Ribonucléiques

in Revue des Fermentations et des Industries Alimentaires (1977), (32), 31-40