Sulfated extracellular polysaccharide production by the halophilic cyanobacterium Aphanocapsa halophytia immobilized on light-diffusing optical fibers

Tadashi Matsunaga, H. Sudo, H. Takemasa, Y. Wachi, N. Nakamura

Research output: Contribution to journalArticle

27 Citations (Scopus)


The cyanobacterium, Aphanocapsa halophytia MN-11, was immobilized in calcium alginate gel and coated on light-diffusing optical fibers (LDOF) for sulfated extracellular polysaccharide production. Results indicated that sulfated extracellular polysaccharide production depends on the number of immobilized cells and the light intensity. In addition, the production rate reached 116.0 mg (mg dry cells)-1 day-1 when the cells that were immobilized on LDOF were incubated under a light intensity of 1380 cd sr m-2 at a cell concentration of 1.0 x 108 cells/cm3 gel. Cells immobilized on LDOF produced about ten times more sulfated extracellular polysaccharide than those immobilized in calcium alginate beads only (11.7 mg(mg dry cells)-1 day-1).

Original languageEnglish
Pages (from-to)24-27
Number of pages4
JournalApplied Microbiology and Biotechnology
Issue number1-2
Publication statusPublished - 1996
Externally publishedYes


ASJC Scopus subject areas

  • Biotechnology
  • Bioengineering
  • Microbiology

Cite this