Precipitation of iron in windowpane oyster shells by marine shell‐boring Cyanobacteria
作者:
Chandralata Raghukumar,
V.P.C. Rao,
S.D. Iyer,
期刊:
Geomicrobiology Journal
(Taylor Available online 1989)
卷期:
Volume 7,
issue 4
页码: 235-244
ISSN:0149-0451
年代: 1989
DOI:10.1080/01490458909377869
出版商: Taylor & Francis Group
关键词: Iron;windowpane oyster shell;shell‐boring cyanobacteria;marine
数据来源: Taylor
摘要:
Shells of windowpane oyster[Placuna placenta(L)]in the intertidal zone of the Zuari estuary, Goa, were often found to be black in color. Microscopical observation of partially decalcified shells showed the presence of cyanobacterial filaments encrusted with black precipitate. Microchemical test (Prussian blue reaction) and wavelength dispersive x‐ray analysis confirmed this precipitate to be of iron. Mineralogical studies of this black precipitate, using x‐ray diffraction and scanning electron microscopy, suggested the presence of iron as iron oxides. The cyanobacteria from such black shells were cultured in enriched seawater medium. In this medium also they precipitated iron as confirmed by Prussian blue reaction. They were identified asPlectonema terebransBorn et Flah andPhormidiumsp.
点击下载:
PDF (589KB)
返 回