摘要:
Expression plasmids comprising a nucleic acid sequence of interest controlled by a T7 bacteriophage promoter and a stabilizing region comprising all or part of the par region of the RP4 plasmid or a derivative thereof. The invention also concerns the use of said plasmids in the production of recombinant products.
摘要:
Compositions containing one or more nucleic acids and cationic polymers, and their use in gene therapy, particularly for in vivo nucleic acid transfer.
摘要:
The present invention relates to compositions comprising nucleic acids and oligopeptides, and their use in therapy and in gene therapy, in particular for the transfer of nucleic acids.
摘要:
Cells with an alteration at least in the gene involved in betaine catabolism, their preparation and their use, in particular for producing metabolites and/or enzymes, are disclosed.
摘要:
Biocompatible microspheres containing one or more active principals, a biodegradable and biocompatible polymer and a surface-active agent which is also biodegradable and biocompatible, contain less than 10 ppm of heavy metals. These microspheres are prepared by providing a solution of the polymer and of the active principal in a water-immiscible solvent which is more volatile than water and mixing with an aqueous solution of the surface-active agent, followed by evaporation of the solvent.
摘要:
Novel recombinant yeasts are disclosed which are highly stable in a complex medium. Said yeasts are of the Kluyveromyces genus in which an essential gene is non-functional, containing a vector bearing a functional copy of said gene.
摘要:
THE INVENTION IS DIRECTED TO A PROCESS OF FORMING A CATALYTIC ELECTRODE. TO ACCOMPLISH THIS A MOLDING COMPOSITION IS FORMED OF A CATALYTIC POWDER HAVING AN AVERAGE PARTICLE SIZE LESS THAN 250 ANGSTROMS AND FROM 0.5 TO 50 PERCENT BY WEIGHT OF A THERMOPLASTIC BINDER HAVING AN AVERAGE MAXIMUM PARTICLE DIMENSION OF LESS THAN 50 MICRONS AND A CRITICAL SURFACE TNESION LESS THAN THE SURFACE TENSION OF WATER. THE MOLDING COMPOSITION IS SHAPED AT ELEVATED TEMPERATURES AND PRESSURES TO FORM A BILLET. THE BILLET IS SLICED INTO THIN SHEETS OF UNIFORM THICKNESS AND UNITED TO ONE OR MORE CURRENT COLLECTORS.