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The Korean Society for Biotechnology and Bioengineering (한국생물공학회)
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Effect of Alginate on the Growth of Nannochloropsis oculata NIES-2145

알긴산이 Nannochloropsis oculata NIES-2145의 생장에 미치는 영향

  • Park, Hyun-Jin (Department of Bioscience and Biotechnology, College of Medical and Life Science, Silla University) ;
  • Kim, Young-Hwa (Department of Pharmaceutical Engineering, College of Medical and Life Science, Silla University) ;
  • Lee, Jae-Hwa (Department of Bioscience and Biotechnology, College of Medical and Life Science, Silla University)
  • 박현진 (신라대학교 의생명과학대학 생명공학과) ;
  • 김영화 (신라대학교 의생명과학대학 제약공학과) ;
  • 이재화 (신라대학교 의생명과학대학 생명공학과)
  • Received : 2011.04.20
  • Accepted : 2011.05.30
  • Published : 2011.06.30
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Abstract

The growth effect of Nannochloropsis oculata (N.oculata), unicellular microalgae, by alginate was investigated. Alginate was depolymerized with sulfuric acid ($H_2SO_4$) and heat ($121^{\circ}C$), simultaneously. Addition of 0.75% alginate oligomer depolymerized with 0.2 N $H_2SO_4$ showed the maximum yield and the growth rate of N. oculata. Chlorophyll content and reducing sugar was increased by alginate oligomer in a dose-dependent manner. Alginate oligomer promoted the growth of N. oculata, whereas the original alginate polysaccharides had no significant effect. Laminaria japonica (L. japonica) extract containing high level of alginate was also increased growth rate and chlorophyll content. $CO_2$ supply addition to L. japonica extract showed no change the growth rate, although addition to alginate oligomer showed prominently increased. N. oculata could use more saccharides in presence of $CO_2$ according to reducing sugar determination. From these results, it is useful to establish optimal condition for high cell density cultivation of N. oculata.

Keywords

References

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