@article{oai:niigata-u.repo.nii.ac.jp:00006898,
 author = {Iida, Akihiko and Akai, Junji},
 journal = {Science reports of Niigata University. (Geology), Science reports of Niigata University. (Geology)},
 month = {Mar},
 note = {Sediments and water samples were collected mainly from Hokuriku-Niigata region, Japan, stored in the laboratory for several weeks and naturally enriched magnetotactic bacteria and the magnetite grains contained in the bacterial cells were examined. Various shapes of the magnetotactic bacteria were found in many localities. From some localities where coarse sediments are dominant, non-eutrophic environments are characteristic and/or pH of the water is comparatively acidic, magnetotactic bacteria were not found in this method. Changes of the bacterial diversities in Lake Sagata were found: the diversity of bacteria apparently enhanced in spring (March to May) and especially in autumn (October to December), and coccoid bacteria were found in all seasons. Mineralogical characteristics, such as shape, size, twinning, elongation direction, development of crystal faces and so on were also examined and described. TEM images of the cell division were taken. It was clarified that cell division proceeded by dividing vertically to the long axis and the same number of magnetosome chains belonged to the daughter cells , although the number of magnetite crystals is reduced in half. Swimming direction tests of the bacteria were carried out and it was found from the preliminary results that magnetotactic bacteria relatively easily adopt themselves to the magnetic field change after a few months. The specimens from the other localities containing Australia were also described.},
 pages = {43--66},
 title = {TEM study on magnetotactic bacteria and contained magnetite grains as biogenic minerals, mainly from Hokuriku-Niigata region, Japan},
 volume = {11},
 year = {1996}
}