Abstract: The present invention relates to a recombinant microorganism, preferably a recombinant yeast, capable of producing caffeic acid comprising a heterologous gene coding for an enzyme of the hydrolase family capable of breaking, preferably of hydrolyzing, the caffeoyl-shikimate bond to produce caffeic acid from caffeoyl-shikimate. Said microorganism, preferably said recombinant yeast, may also be capable of producing ferulic acid from the caffeic acid obtained. The present invention also relates to a method for producing caffeic acid and a method for producing caffeic acid and/or ferulic acid, using microorganisms, preferably yeasts, according to the invention. Finally, the invention also relates to the use of microorganisms, preferably yeasts, according to the invention to produce caffeic acid and/or ferulic acid.

Abstract: The present invention relates to a recombinant microorganism which is modified to be capable of producing diosmin and hesperidin and to the use thereof for producing diosmin and/or hesperidin.

Abstract: The present invention relates to a recombinant microorganism which is modified to be capable of producing diosmetin and/or hesperetin and to the use thereof for producing diosmetin and/or hesperetin.

Abstract: A separator for use in installations for conveying objects over distances by means of a flow of air, the separator including a generally cylindrical separator grid within a casing, and a spiral grid portion extending outside the cylindrical grid. The spiral grid portion is tangential to said cylindrical grid and to the outside wall of an inlet pipe for admitting a mixture of air and objects. The cylindrical grid and the spiral grid portions permit the passage of air, but not the objects. An adjustable flap is pivoted on the line of intersection between the inside wall of the inlet pipe and said cylindrical grid for controlling the flow of air and objects entering the separator. The spiral grid portion has a rough surface exposed to the gas flow.

Abstract: The present invention relates to an asymmetric gaseous permeation membrane, also applicable to fractionation of a gaseous mixture and in particular dehydration and deacidification of gases, in particular gaseous hydrocarbons, and obtained from polymers of the polyquinoxaline family presenting the unit: ##STR1## and R=H or phenyl radicalG=carbon-carbon bond, or --O--, --S--, --SO.sub.2 --, --CO-- ##STR2## presenting a dense "skin" of low thickness of 0.05 to a few microns substantially without defects to permit gas molecules to pass through by a dissolution-diffusion mechanism.