During neurite elongation, migrating growth cones encounter both permissive and inhibitory substrates, such as laminin and MAG (myelin-associated glycoprotein), respectively. Here, we demonstrated on two neuronal cell lines (PC12 and N1E-115), that laminin and collagen hampered, in a dose-dependent manner, MAG inhibitory activity on several integrin… (More)
Total follicular populations and peripheral plasma concentrations of LH, FSH, prolactin, oestradiol-17 beta and progesterone during the preceding cycle were studied in two breeds of sheep (Romanov and Ile-de-France) which differed widely in their ovulation rates (3.2 and 1.5 respectively). No LH parameters could be correlated with the follicular details… (More)
The replication origins (ORIs) of Schizosaccharomyces pombe, like those in most eukaryotes, are long chromosomal regions localized within A+T-rich domains. Although there is no consensus sequence, the interacting proteins are strongly conserved, suggesting that DNA structure is important for ORI function. We used atomic force microscopy in solution and DNA… (More)
The object of this study was to estimate the relationships between levels of plasma L.H of male I?omanov lambs at ¢,6 and 8 weeks, their testicular growth and the ovulation rate of their paternal half-sisters. Sixty-eight lambs were involved in 197 6 and !¢ in 1977 from a total of 14 sires. At eacli age, 3 samples of blood were taken and the… (More)
A French research institute raises the bar for public outreach with an educational laboratory that engages 1,000 high school students per year in mini research projects.
Two groups of 12 adult Ile-de-France rams were exposed to artificial 6-month light cycles in which daily illumination was provided in one or two photofractions. In Group I, daylength increased linearly from 8 to 16 h in 3 months and decreased similarly from 16 to 8 h. The daily increment or decrement (5.33 min/day) was constant. In Group II, 8 h of light… (More)
The average score for health given by 15 places was 2. 50. In about half of the places there were problems with pneumonia, while other health problems were specific for different places.