Most cited article - PubMed ID 12744079
Ultrastructure of the cyanobacterium Nostoc muscorum and exploitation of the culture for hydrogen production
Frequency of heterocytes and nitrogenase activity (NA) under light and dark cultivation conditions was determined in 12 cyanobacterial strains isolated from various soil habitats. In spite of a high variability, significant differences in NA among the strains were found in response of light and dark cultivation. Relatively high NA (9.9-15.3 micromol/h C2H4 per g fresh mass) under light conditions and basal NA after 12 h of dark cultivation were detected in Anabaena, Nodularia, Tolypothrix, and 1 of Cylindrospermum strains. On the other hand, significantly lower NA (0.76-5.4 micromol/h C2H4 per g fresh mass) was found under light conditions in Trichormus, Nostoc and another Cylindrospermum strain; the activity completely disappeared after 12 h of dark cultivation. NA values were not directly related to the frequency of the heterocytes. The total NA of cyanobacterial colony was found to be probably independent of the number and/or position of heterocytes. Remarkable differences in NA between strains isolated from cultivated fields and strains originating from natural or non-cultivated soils were found.
- MeSH
- Nitrogenase metabolism MeSH
- Soil Microbiology * MeSH
- Cyanobacteria enzymology MeSH
- Light MeSH
- Darkness MeSH
- Publication type
- Journal Article MeSH
- Research Support, Non-U.S. Gov't MeSH
- Comparative Study MeSH
- Names of Substances
- Nitrogenase MeSH
The effect of cyanobacterial polysaccharides (from Cyanothece spp. and Cyanospira capsulata) on the binding of Helicobacter pylori to gastric epithelial cells was evaluated. The antiadhesive action on Kato III and HeLa S3 human gastric cell lines was established.
- MeSH
- Bacterial Adhesion drug effects MeSH
- Polysaccharides, Bacterial biosynthesis chemistry pharmacology MeSH
- Epithelial Cells microbiology MeSH
- HeLa Cells MeSH
- Helicobacter pylori physiology MeSH
- Humans MeSH
- Cell Line, Tumor MeSH
- Cyanobacteria metabolism MeSH
- Gastric Mucosa microbiology MeSH
- Check Tag
- Humans MeSH
- Publication type
- Journal Article MeSH
- Research Support, Non-U.S. Gov't MeSH
- Names of Substances
- Polysaccharides, Bacterial MeSH
