Survey of British Top Fermentation Yeasts: I. Introduction

Methods employed in the isolation and storage of yeast clones are discussed. 10% wort-gelatin is preferred as medium for development of giant colonies; at 18° C. good colony growth requires ca. 3 weeks. Owing to wort variations, initial comparisons should be made using the same wort. The incorporation in the medium of 0·1% of diphenyl as fungistatic has no adverse effect on the yeast. Growth records are made photographically and by verbal description.