Henkel Kommanditgesellschaft Auf Aktien

Henkel Kommanditgesellschaft Auf Aktien (henkel Kgaa)

Henkel Kgaa

Frank F Hill

Joachim Schindler

Alfred Struve

Rolf Schmid

Wolfgang Preuss

This invention relates to a process for the preparation of a concentrate containing sterol compounds of natural origin, which concentrate is suitable as a starting material for the transformation of sterol compounds by fermentation, which comprises the steps of:

Transformation of sterols by fermentation

Sterol concentrates, the preparation thereof, and their use in the

For the production of 17-C-steroid-.alpha.-propionic acid compounds by microbial side chain degradation on 17-C-side chain steroid substrates wild strain microorganisms selected in predetermined manner are subjected to a multi-stage mutation and selection. The resultant mutant strains are capable of supplying the desired compounds, e.g. .DELTA.-4 BNC and/or .DELTA.-1,4 BNC in high yields even in the absence of inhibitors arresting the growth and/or degradation of the steroid ring. Wild strains and mutants particularly suitable, and their choice, production and use, are described.

Process for the preparation of defective mutants of microorganisms

A process for the production of useful steroids obtained by side chain degradation of sterol source materials through the use of microorganisms is described.

Steroid production

A process for the production of baker's yeast with improved activity or leavening power under acid leavening conditions is carried out by cultivating fresh yeast conventionally to the last propagation stage, propagating the fresh yeast in the last propagation stage in the presence of from 0.1 gm to 10 gm per liter of culture broth containing a source of carbon and nitrogen, of an aliphatic carboxylic acid having from 2 to 4 carbon atoms, and recovering baker's yeast with improved activity or leavening power.

Baker's yeast with improved leavening power in acid dough

A process for the production of a yeast autolysate consisting essentially of heating an aqueous suspension of live yeast cells to a temperature of from 20.degree. C. to 60.degree. C. for from 6 to 36 hours in the presence of from 0.03% to 15% by weight, based on the weight of the dry yeast mass, of a material selected from the group consisting of fatty acids having from 4 to 14 carbon atoms and their mono-, di- and tri-glyceride esters, separating the shells of the yeast cells from the liquid, evaporating said liquid and recovering a yeast autolysate.

Growing community of inventors

Mettmann-Obschwarzbach, Germany

Frank F Hill