Desaturations microsomales hepatiques chez la ratte allaitante ingerant un regime hypoproteique supplemente ou non en methionine

International audienc

Effects of protein level, methionine supplementation and carbohydrate type of the diet on liver lipid and plasma free threonine contents in the lactating rat

International audienc

Desalcolisation des boissons (mélanges eau-éthanol) par distillation membranaire

International audienc

Supplementation en methionine du regime alimentaire de la ratte allaitante : effet sur les teneurs en threonine du plasma et en lipides du foie

International audienc

Effects of protein level, methionine supplementation and carbohydrate type of the diet on liver lipid and plasma free threonine contents in the lactating rat

International audienc

Sweep gas membrane distillation in a membrane contactor with metallic hollow fibers

This work revolves around the use of porous metal hollow fibers in membrane distillation. Various stages are covered, starting from membrane synthesis up to the testing of a pilot scale membrane module. Mechanically stable metal hollow fibers have been synthesized by phase inversion of a stainless steel particle loaded polymer solution, followed by thermal treatment to remove the polymer and sinter the particles together. The pore surface of the metal fibers has been made hydrophobic by functionalization with polydimethylsiloxane or stearic acid. A water evaporation flux of 0.2 kg h−1 m−2 was obtained at a feed water temperature of 333 K and a sweep gas flow rate of 135 L h−1 (Reair=2458) with pure water as feed. Under similar operating conditions, an evaporation flux of 0.14 kg h−1 m−2 was achieved when a 600 g L−1 sucrose solution was used as feed

Process intensification by coupling the Joule effect with pervaporation and sweeping gas membrane distillation

This work concerns the intensification of membrane processes by coupling the Joule effect with two membrane processes: pervaporation and sweeping gas membrane distillation. For this purpose, conducting metallic hollow fibers impregnated or coated with polydimethyl siloxane were simultaneously used as membrane and heating electric resistance. The application of an electrical potential resulted in an enhancement of 40% of the water vapor permeate flux in sweep gas membrane distillation. However, the flux enhancement is the result not only of the heating on the membrane vicinity but also on the enhancement of the feed temperature. In the case of pervaporation of aqueous ethanol solutions (20%), the direct heating of fibers allowed improving by 100% the ethanol permeate flux while increasing the process selectivity

Sweep gas membrane distillation using stainless-steel hollow-fibers: from material to process

International audienc