[Increase of rising activity of commercial yeasts by application of stress conditions during their propagation].
Rising activity determined as CO2 production of two commercial strains of Saccharomyces cerevisiae could be increased mainly in sweet bread doughs by introducing a "starvation/pulse feeding" schedule of sugar cane molasses during a fed-batch propagation. Such increase was strain dependent. Except for the trehalose intracellular level, other traits related to the yeast industrial performance were unaffected. Applicability of method for baker's yeast industrial production is discussed.
Galvagno
M A
MA
Depto. de Ingeniería Química, Facultad de Ingeniería, UBA, Ciudad Universitaria, Pabellón de Industrias, 1428 Buenos Aires, Argentina. mag@di.fcen.uba.ar
Cerrutti
P
P
D001939:Bread; D050260:Carbohydrate Metabolism; D002245:Carbon Dioxide / Q000032:analysis / Q000378:metabolism*; D005285:Fermentation; D007218:Industrial Microbiology / Q000379:methods*; D008965:Molasses; D009172:Mycology / Q000379:methods*; D012441:Saccharomyces cerevisiae / Q000254:growth & development* / Q000378:metabolism; D014199:Trehalose / Q000378:metabolism
D002245:Carbon Dioxide; D014199:Trehalose