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Portrait of the cyanophyte, Aphanizomenon flosaquae. Collected from freshwater pond near Boise, Idaho. Brightfield optics.
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Cylindrospermopsis (sill-in-dro-sperm-op-sis) raciborskii, a blue green alga (cyanobacterium) in which the terminal cells of the trichomes or filaments appear a bit like candle flames. With no membrane bound organelles but sometimes with refractile deposits. Differential interference microscopy.
data on this strain.
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Anacystis (a-na-cyst-is) is a cyanobacterium in which globular cells are located within a gelatinous matrix. Some of the cyanobacteria with this form can be toxic. Differential interference contrast.
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Trichodesmium (try-koe-des-me-um) is a filamentous cyanobacterium (blue-green alga). It may form blooms or rafts. A significant contributor to nitrogen fixation in the oceans. Differential interference microscopy.
data on this strain.
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Cylindrospermopsis (sill-in-dro-sperm-op-sis) raciborskii, a blue green alga (cyanobacterium) in which the terminal cells of the trichomes or filaments appear a bit like candle flames. With no membrane bound organelles but sometimes with refractile deposits. Phase contrast microscopy.
data on this strain.
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Anacystis (a-na-cyst-is), a cyanobacterium or blue green algae, in which the cells are clumped together within a mucus material. The clusters have to be compressed so that the individual cells can be observed. This genus adopts a variety of forms. Some Anacystis species are known to produce toxins. Phase contrast.
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Trichodesmium (trike-owe-des-me-um) bundle. This is a filamentous blue green alga, which can occur in abundances which discolour the water. Not known to produce toxins, but abundances may be high enough to disturb the supply of oxygen to other organisms. This is a dense cluster of filaments. Dark ground image by Dave Caron.
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Cylindrospermopsis (sill-in-dro-sperm-op-sis) raciborskii, a blue green alga (cyanobacterium) in which the terminal cell of the trichome (filament) appears a bit like a candle flame. Phase contrast microscopy. "
data on this strain.
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Anabaena (a-na-bean-a) is a filamentous cyanobacterium, the slightly larger cells are heterocysts, and are associated with nitrogen fixation. Nitrogen fixing cyanobacteria are important for nitrogen generation in rice paddy fields. Differential interference contrast.
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Spirulina (spirr-you-line-a) a spiral bacterium, motile, moves by cork-screw motion. A blue-green alga. If the cells are irradiated with ultraviolet light, the pigment absorbs some radiant energy and re-emits at with lower energy - with the colour shifted to the red end of the spectrum. Fluorescence microscopy removes the irradiating ultraviolet light, leaving the red colour of the fluorescing pigments. Fluorescence microscopy.
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Anabaena (ann-a-bean-ah) (tentative identification) filaments with heterocysts and cells of variable size. Differential interference contrast.
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Spirulina (spirr-you-line-a) a spiral bacterium, motile, moves by cork-screw motion. Very light pigmentation. Phase contrast.
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Anabaena (ann-a-bean-a) one of the filamentous blue green alga which can form heterocysts. Single filaments are attached to the substrate and occur within an irregular mucus sheath which acquires metal salts to become brown in colour. Heterocysts are spherical, more hyaline, slightly larger than other cells and are a site for enhanced nitrogen fixation. Phase contrast.
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Spirulina, a spiral-shaped cyanobacterium, is one of the members of the brown mat communities found on Mammoth Terraces.
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Anabaena (ann-a-bean-a) one of the filamentous blue green alga which can form heterocysts. Single filaments are attached to the substrate and occur within an irregular mucus sheath which acquires metal salts to become brown in colour. Heterocysts are spherical, more hyaline, slightly larger than other cells and are a site for enhanced nitrogen fixation. Differential interference contrast.
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Spirulina has a very distinctive corkscrew form.
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Anabaena (ann-a-bean-a) one of the filamentous blue green alga which can form heterocysts. Single filaments are attached to the substrate and occur within an irregular mucus sheath which acquires metal salts to become brown in colour. The sheath is emphasized in this image. Heterocysts are spherical, more hyaline, slightly larger than other cells and are a site for enhanced nitrogen fixation. Phase contrast.
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Spirulina. Cell observed in sandy and muddy marine sediments in the vicinity of Broome, Western Australia in September 2003. This image was taken using phase contrast optics. This work was supported by the Australian Biological Resources Study.
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Anabaena (ann-a-bean-a) a filamentous blue green algae, with differentiated cells within the filament or trichome. Differential interference microscopy.
data on this strain.
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Single spiral cell.
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Anabaena (ann-a-bean-a) a filamentous blue green algae, with differentiated cells within the filament. The central cell is a heterocyst, the site of nitrogen fixation. Differential interference microscopy.
data on this strain.
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Aphanothece (a-fan-owe-theek-ee) blue green alga in which many coccoid or cylindrical cells share a common mucus sheath. Phase contrast.
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Anabaena (ann-a-bean-a) filamentous blue-green alga (cyanobacterium), some cells are different to others. They are referred to as heterocysts, and seem to be specialised to carry out nitrogen fixation. Differential interference contrast.
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Aphanothece (a-fan-owe-theek-ee) blue green alga in which many coccoid or cylindrical cells share a common mucus sheath. Differential interference contrast.