Éditeur(s) : HAL CCSD Elsevier
Résumé : International audience
Thermogravimetric results on the thermal degradation of isolated components extracted from shells of tropical fruit stones and seeds allowed us to establish the dependence of the yield of char obtained by high-temperature pyrolysis (600-900 °C) of lignocellulosic raw materials on the content of components in precursors...
ISSN: 1387-1811

hal-00809743
https://hal.univ-antilles.fr/hal-00809743
DOI : 10.1016/S1387-1811(03)00288-9

Éditeur(s) : HAL CCSD Editions Paralia CFL
Résumé : The wave-dominated beach barrier of Villeneuve-Lès-Maguelone extends between Palavas and Frontignan (Gul f of Lions, northernmost Me diterranean Sea), along a slightly natural sandy protected area char acterized by typical and well-expressed morphologies. In the nearshore, the sea bottom shows one or two approximately rectilinear sand bars. In 2010-2011, we pe rformed a 6 month-long monitoring (autumn 2010/late spring 2011) of a 500 meter-long se gment along this sand barrier. We used RTK D-GPS offering centimeter resolution to acquire sets of elevation data on the beach and the upper shoreface. The study is innovative because a full morphologic monitoring was performed each time the wave/ wind conditions changed significantly. These changes were tracked in real-time thanks to a set of hydrodynamic equipments deployed at sea, including well-known DREAL buoys. We identify from well- documented data: (1) a beach reconstruction cycle at the shorelin e after a moderate storm event (wave height at 3-4 m) and (2) how a sand bar in the nearshore migrates to the shoreline and drives the shoreline shift.
ISSN: 1760-8716

hal-00854402
https://hal.archives-ouvertes.fr/hal-00854402
DOI : 10.5150/jngcgc.2012.023-C

Éditeur(s) : HAL CCSD Magnolia Press
Résumé : International audience
A new species of the genus Cocconeis is described. Cocconeis sawensis sp. nov. was observed as epiphyte on the macrophyte Chara Linn. sp., collected from a saline lake in Iraq (Sawa Lake). Description of the new species is based on details observed with light and scanning electron microscopy. Cocconeis sawensis belongs to a group of taxa similar to Cocconeis euglypta Ehrenberg, but differs in a number of fine ultrastructural features including stria density and hymenes, raphe, valve shape and rim, valvocopula, hymen perforations and fimbriae shape as well as a presence of a pore-like structure reminiscent of a vestigial raphe in the sternum valve. A comparison with closely related taxa is given.
ISSN: 1179-3155

hal-01296895
https://hal-univ-perp.archives-ouvertes.fr/hal-01296895
DOI : 10.11646/phytotaxa.181.4.2