Journal of the Korean Society of Food Science and Nutrition (한국식품영양과학회지)

The Korean Society of Food Science and Nutrition (한국식품영양과학회)
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Characteristics of Culture and Isolating Lactic Acid Bacteria and Yeast from Sourdough

Sourdough로부터 젖산균과 효모의 분리 및 배양 특성

  • Published : 2004.08.01
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Abstract

This study was conducted to investigate the optimum conditions for the medium composition after isolating and identifying yeast and lactic acid bacteria from sourdough. It was found that the best quality lactic acid bacterium with acid product and flavor was identified as Leuconostoc species among isolated 115 lactic acid bacteria, the best Quality yeast with good fermentation and flavor was identified as Saccharomyces species among isolated 8 yeast. While the microbial growth with glucose or sucrose as sugar source was good, it was, selected that sucrose which is using commercially is better than glucose. The growth of lactic acid bacterium ; was good with 1％ added sucrose whereas yeast needed more growth. Additionally, the medium for the optimum 1 growth of the yeast was composed of 0.5％ wheat flour, 0.5％ peptone and 3％ sucrose, whereas lactic acid bacterium was composed of 0.5％ wheat flour and 1％ sucrose without peptone.

본 연구는 sourdough 제빵에 관여하는 우수한 효모와 젖산균을 분리, 선별하고 이들의 최적 배지 조성을 연구하였다. 1차 분리된 젖산균 115균주 중 항균성이 우수하고, 산 생성 및 향이 우수한 균주를 선별하여 동정한 결과 Leuconostoc sp.로 나타났다. 효모는 8개 균주를 1차 선별하였으며, 발효와 향이 우수한 균주를 선별하여 동정한 결과 Saccharomyces sp.로 동정되었다. 당 발효성을 실험한 결과, glucose와 sucrose에서 생육이 우수하였으나, 상업적으로 많이 사용하고 있는 sucrose가 좋을 것으로 판단되었다. 젖산균은 밀가루배지에 1% sucrose첨가만으로 생육이 우수하였으나, 효모인 경우는 증식이 더 필요하였다. 추가적으로 분리된 효모의 생육 실험을 하여 나타난 최적배지조성은 wheat flour 0.5%, peptone 0.5%, sucrose 3%로 나타났으며, 젖산균인 경우는 peptone의 첨가없이 wheat flour 0.5%, sucrose 1%로 나타났다.

Keywords

References

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