Détermination des acides aminés limitants chez le taurillon BBBc recevant une ration à base d'ensilage de maïs

peer reviewe

Numerical discretization of rotated diffusion operators in ocean models

A method to improve the behavior of the numerical discretization of a rotated diffusion operator such as, for example, the isopycnal diffusion parameterization used in large-scale ocean models based on the so-called z-coordinate system is presented. The authors then focus exclusively on the dynamically passive tracers and analyze some different approaches to the numerical discretization. Monotonic schemes are designed but are found to be rather complex, while simpler, linear schemes are shown to produce unphysical undershooting and overshooting. It is suggested that the choice of an appropriate discretization method depends on the importance of the rotated diffusion in a given simulation, whether the field to be diffused is dynamically active or not

Influence of chestnut tannins on in vitro crude protein rumen degradability kinetics of red clover silage

Chestnut tannins in red clover silage reduce rumen dry matter and crude protein degradation. Adding tannins to silage could lead to better nitrogen use efficiency in ruminants

Physiologie de la reproduction et endocrinologie chez les cervidés : une revue

peer reviewedKnowledge about cervids are rapidly growing. This work aims to present the more recent scientific information on reproductive physiology and endocrinology of the cervids: anatomy of the genital tract, length of breeding season, parameters and endocrinology of the reproductive cycle, endocrinology of pregnancy. It also aims to highlight differences between cervids and domestic ruminants such as embryonic diapause observed in Capreolus capreolus.Les connaissances relatives aux cervidés sont de plus en plus étendues. La présente synthèse vise à rapporter à partir des données récentes de la littérature les caractéristiques essentielles de la reproduction des principales espèces : anatomie de l’appareil reproducteur, durée de la saison de reproduction, différents paramètres du cycle sexuel, endocrinologie du cycle sexuel et de la gestation. Il vise également à mettre en évidence les particularités différenciant les cervidés des ruminants domestiques, telle par exemple la diapause embryonnaire rencontrée chez le chevreuil

The First Extrasolar Planet Discovered with a New Generation High Throughput Doppler Instrument

We report the detection of the first extrasolar planet, ET-1 (HD 102195b), using the Exoplanet Tracker (ET), a new generation Doppler instrument. The planet orbits HD 102195, a young star with solar metallicity that may be part of the local association. The planet imparts radial velocity variability to the star with a semiamplitude of $63.4\pm2.0$ m s$^{-1}$ and a period of 4.11 days. The planetary minimum mass ($m \sin i$) is $0.488\pm0.015$ $M_J$.Comment: 42 pages, 11 figures and 5 tables, Accepted for publication in Ap