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Improvements in Efficiency of Yeasts for Ethanol Production

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DISSERTATIONSubmitted to the Punjab Agricultural University, Ludhiana, in partial fulfillment of the requirements for the degree of>ABSTRACTEight strains of yeasts, namely S. cerevisiae-220, S. cerevisiae-360, S. cerevisiae-181/3c, Trichosporon beigelli, Candida haemulonii, C. parapsilosis, Candida sp.-3(1) and Candida sp.-5(2) have been evaluated for their potential to ferment cane sugars to ethanol at three temperatures. S. cerevisiae-220 utilized 84.0% substrate in 60 h at 30 ± 1 °C. S. cerevisiae-360 fermented substrate more efficiently (69.3%) at 38 ± 1 °C. S. cerevisiae-220 multiply faster at 30 ± 1 as well as at 38 ± 1 °C. S. cerevisiae-220 could withstand 13.0% ethanol whereas S. cerevisiae-360 tolerated only 8.0% of ethanol supplemented in the growth medium. The protoplasts of S. cerevisiae-220 and S. cerevisiae-360 fused together could not generate ethanol more efficiently than their parents at 38 ± 1 °C. S. cerevisiae-220 adapted at 38 ± 1 °C utilized 64.4% of substrate during 60 h. Wine with commercially outstanding quality has been prepared from Zingiber officianale with S. cerevisiae-220-A at 38 ± 1 °C.

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  • Sprog:
  • Engelsk
  • ISBN:
  • 9789395766487
  • Indbinding:
  • Paperback
  • Sideantal:
  • 110
  • Udgivet:
  • 24. marts 2023
  • Størrelse:
  • 189x6x246 mm.
  • Vægt:
  • 213 g.
  • 2-3 uger.
  • 2. december 2024
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DISSERTATIONSubmitted to the Punjab Agricultural University, Ludhiana, in partial fulfillment of the requirements for the degree of>ABSTRACTEight strains of yeasts, namely S. cerevisiae-220, S. cerevisiae-360, S. cerevisiae-181/3c, Trichosporon beigelli, Candida haemulonii, C. parapsilosis, Candida sp.-3(1) and Candida sp.-5(2) have been evaluated for their potential to ferment cane sugars to ethanol at three temperatures. S. cerevisiae-220 utilized 84.0% substrate in 60 h at 30 ± 1 °C. S. cerevisiae-360 fermented substrate more efficiently (69.3%) at 38 ± 1 °C. S. cerevisiae-220 multiply faster at 30 ± 1 as well as at 38 ± 1 °C. S. cerevisiae-220 could withstand 13.0% ethanol whereas S. cerevisiae-360 tolerated only 8.0% of ethanol supplemented in the growth medium. The protoplasts of S. cerevisiae-220 and S. cerevisiae-360 fused together could not generate ethanol more efficiently than their parents at 38 ± 1 °C. S. cerevisiae-220 adapted at 38 ± 1 °C utilized 64.4% of substrate during 60 h. Wine with commercially outstanding quality has been prepared from Zingiber officianale with S. cerevisiae-220-A at 38 ± 1 °C.

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