Max Henry [boxeur] : [photographie de presse] / [Agence Rol]

Référence bibliographique : Rol, 55120

Max Henry [boxeur] : [photographie de presse] / [Agence Rol]

Référence bibliographique : Rol, 55119

Physiologie du théâtre / par un journaliste [Louis Couailhac]... ; vignettes de MM. Henry Émy et Birouste

Collection : [Physiologie Laisné-Aubert]

Molecular markers allow sibling species identification in red wood ants (Formica rufa group)

Red wood ants (Formica rufa group) constitute a group of species that are considered to be among the most promising bioindicators in forest ecosystems. However, because of their morphological similarity and intraspecific variability, morphological species identification can be difficult. Considerable expertise is necessary to discriminate between the sibling species F. lugubris and F. paralugubris, two species that often live in sympatry in the same Alpine forests. New taxonomic tools providing rapid and reliable species identification are needed. We present a simple and reliable molecular technique based on mtDNA (COI gene) and a restriction enzyme for discriminating between F. lugubris and F. paralugubris. We confirm the validity of this method with a Bayesian analysis based on microsatellites. This new molecular tool represents a clear breakthrough for discriminating between F. lugubris and F. paralugubris and is likely to be helpful in large-scale biomonitoring.

Aubry le boucher : drame en quatre actes / par MM. Henry Marcaille et Paul Fauquemont

Collection : Magasin théâtral

[Henry] Ferrette, député de la Meuse : [photographie de presse] / [Agence Rol]

Référence bibliographique : Rol, 56971

Stone-ground wood pulp-reinforced polypropylene composites: water uptake and thermal properties

Two of the drawbacks of using natural-based composites in industrial applications are thermal instability and water uptake capacity. In this work, mechanical wood pulp was used to reinforce polypropylene at a level of 20 to 50 wt. %. Composites were mixed by means of a Brabender internal mixer for both non-coupled and coupled formulations. Differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA) were used to determine the thermal properties of the composites. The water uptake behavior was evaluated by immersion of the composites in water until an equilibrium state was reached. Results of water absorption tests revealed that the amount of water absorption was clearly dependent upon the fiber content. The coupled composites showed lower water absorption compared to the uncoupled composites. The incorporation of mechanical wood pulp into the polypropylene matrix produced a clear nucleating effect by increasing the crystallinity degree of the polymer and also increasing the temperature of polymer degradation. The maximum degradation temperature for stone ground wood pulp–reinforced composites was in the range of 330 to 345 ºC

[Le] général [Léonard] Wood, candidat à la présidence des USA, avec ses deux fils, [le] sous-lieutenant [Osborne] Wood à gauche et le capitaine Léonard Wood [Jr] : [photographie de presse] / [Agence Rol]

Référence bibliographique : Rol, 57543

C. P. Wood, H. O. Wood, W.H. Guy sur Scott [750 cmc, concurrent de la course motocycliste Paris-Nice] : [photographie de presse] / [Agence Rol]

Référence bibliographique : Rol, 57955