Abstract:The addition of a solid carrier before drying seems a promising way to improve the processability and the drying kinetics of yeast pellets. However, its influence on the quality of the yeasts during and at the end of the drying is not yet well understood and is investigated in this communication. A yeast paste was mixed with different amounts of wheat flour, a solid carrier, to obtain pellets with 69, 55, and 40 wt% moisture content. The fermentation activity of the yeasts was measured in samples taken through… Show more
“…Van Engeland et al. (2021) determined that the yeast activity could reduce by 40–85% during convective drying of fresh BY even at low drying temperatures (40°C).…”
The study aimed to produce instant dried baker's yeast (BY) by conventional or infrared-assisted refractance window drying (RWD or InfraRWD, respectively) and compare their bakery performance with commercial BY. According to the findings of the study, the total yeast count was higher than 9.60 log cfu/g in all dried BY samples, and the lowest viability was obtained in BY dried by InfraRWD at 50 • C. In general, BY produced by RWD increased the physical quality parameters of bread such as specific volume, total cell count, and the number of cell areas of bread crumbs. Moreover, bread leavened by BY dried by RWD slowed down the staling rate of bread, while infrared assistance accelerated the staling. Sensorial analysis showed that bread produced by refractance window dried BY was more acceptable than commercial BY. In a conclusion, RWD can be an effective alternative to the production of instant baker's yeast, but the most quality features of BY has negatively affected by infrared assistance.
“…Van Engeland et al. (2021) determined that the yeast activity could reduce by 40–85% during convective drying of fresh BY even at low drying temperatures (40°C).…”
The study aimed to produce instant dried baker's yeast (BY) by conventional or infrared-assisted refractance window drying (RWD or InfraRWD, respectively) and compare their bakery performance with commercial BY. According to the findings of the study, the total yeast count was higher than 9.60 log cfu/g in all dried BY samples, and the lowest viability was obtained in BY dried by InfraRWD at 50 • C. In general, BY produced by RWD increased the physical quality parameters of bread such as specific volume, total cell count, and the number of cell areas of bread crumbs. Moreover, bread leavened by BY dried by RWD slowed down the staling rate of bread, while infrared assistance accelerated the staling. Sensorial analysis showed that bread produced by refractance window dried BY was more acceptable than commercial BY. In a conclusion, RWD can be an effective alternative to the production of instant baker's yeast, but the most quality features of BY has negatively affected by infrared assistance.
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