Showing papers by "University of Antananarivo published in 1995"
TL;DR: Subfossil bird bones collected at two sites on Madagascar include specimens of two species of Aquila eagles, agenus previously unknown on Madagascar, not possible to determine if these specimens represent extinct or extirpated species.
13 citations
TL;DR: In this paper, sixteen compounds were characterized by GC and GC/MS in Vepris elliotii oil obtained by steam distillation of fresh leaves collected from Madagascar, including α-pinene (4.3%), limonene (6.2%), terpinolene (49.7%), and (E)-anethol (23.5%) were the main components.
Abstract: Twenty-six compounds have been characterized by GC and GC/MS in Vepris elliotii oil obtained by steam distillation of fresh leaves collected from Madagascar. Among the constituents, α-pinene (4.3%), limonene (6.2%), terpinolene (49.7%) and (E)-anethol (23.5%) were the main components.
12 citations
TL;DR: In this paper, the equations of steady-state laminar boundary layer around a body of revolution (sphere, extended and flattened ellipsoids) were solved using an finite difference method.
Abstract: Les auteurs resolvent a l'aide d'une methode aux differences finies les equations de la couche limite laminaire et permanente qui entoure des corps a symetrie de revolution (sphere, ellipsoides allonge et aplati), au nez oriente vers le haut, portes, a 500°C, en rotation uniforme autour d'un axe vertical dans un ecoulement axial descendant de gaz d'hydrogene a 25°C La variabilite des proprietes physiques; du fluide en fonction de la temperature est prise en compte ainsi que la convection naturelle qui en resulte Les auteurs montrent que l'ecoulement et les transferts dependent de facon significative de cette variabilite et qu'il est possible de contrǒler la croissance des couches limites thermique et massique en agissant sur les conditions operatoires, notamment sur le profil des corps Une application directe de ce travail est le contrǒle des depǒts en phase vapeur
The authors solve using an finite difference method the equations of steady-state laminar boundary layer around a body of revolution (sphere, extended and flattened ellipsoids) Hydrogen gas at 25°C flows upward around the body Its nose faces downward, the temperature of its surface is 500°C and it rotates about its vertical axe at a constant velocity The variability of the physical properties of the fluid as a function of temperature is considered as well as the resulting natural convection It is revealed that flow, heat and mass transfers depend of the physical properties of the gas It is possible to control the development of thermal and diffusional boundary layers through the operational conditions, specially the contour of the body
3 citations