Rhone-poulenc Fibres Et Polymeres S.a.

Rhodia Chimie

Aventis Animal Nutrition S.a.

Catherine Jourdat

Olivier Favre-Bulle

Dominique Petre

Dominique Dupuis

Denis Thibaut

Jo&euml;l Crouzet

Jerome Pierrard

Didier Faucher

Carole Guitton

Joel Crouzet

Jérôme Pierrard

Anne-Marie Le Coq

The invention concerns a modified nitrilase with modulated selectivity, characterized in that it comprises in position 162 an amino acid residue different from the original amino acid residue.

Method for modulating nitrilase selectivity, nitrilases obtained by said method and use thereof

The invention concerns a method for preparing mineral capsules consisting of aqueous liquid core enclosed in mineral coating, said method consisting in: 1) emulsifying an aqueous fluid in a phase non-miscible with said aqueous fluid so as to disperse it therein in the form of droplets; 2) contacting, in the resulting emulsion, at least a zirconium, silicon, aluminium and/or a transition metal capable of being hydrolysed or subjected to condensation polymerisation in temperature and pH conditions suitable for forming a precipitate consisting of the corresponding oxide or hydroxide; 3) recuperating the resulting mineral capsules and, if required, purifying them. Said method is characterised in that the formation of the mineral precipitate in the second step is carried out in the presence of an amphiphilic surfactant system present in the emulsion and capable of concentrating the deposit of mineral particles of said precipitate formed in the interface of the aqueous droplets and the hydrophobic phase and of effectively blocking their diffusion inside the droplets.

Method for preparing capsules consisting of a liquid active material core enclosed in a mineral coating

The present invention relates to an enzyme with amidase activity, particularly towards substrates of the oligomer type derived from PA 6.6 (formula I) and/or PA 6 (formula II), said enzyme being characterized by a ratio

Enzymes and microorganisms having amidase activity for hydrolysing polyamides

The present invention relates to a process for the enzymatic hydrolysis of polyamides 6.6 to give adipic acid monomers and hexamethylenediamine monomers. The present invention further relates to an enzyme with amidase activity particularly towards substrates of the oligomer type derived from PA 6.6 and/or PA 6, said enzyme being characterized in that it consists of a peptide sequence corresponding to SEQ ID NO: 1 in the attached sequence listing and/or at least one polypeptide homologous to this sequence. The invention further relates to the DNA coding for said enzyme and to the biological precursors thereof The invention further relates to the microorganisms capable of producing this enzyme and to the hydrolysis process in which this enzyme and/or these microorganisms are applied.

Enzymes and micro organisms with amidase activity which hydrolyze polyamides

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Sainte-Foy-lès-Lyon, France

Catherine Jourdat