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Protists - Living Material
Live specimens are used for a wide variety of studies including studying the physiological effects of drugs on a specimen’s heartbeat and temperature on metabolism, the locomotion of microscopic organisms, and studying plant respiration, photosynthesis, plosmolysis, and more. Algal cultures form colonies of cells that are extremely easy to visualize for better understanding of cell walls and plastids, and many live specimens reproduce rapidly for quick turnover between successive tests.
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Ward's® Live Stentor coeruleus Culture
This organism is easily recognized by its trumpet-shape and blue coloration. It is quite large (approx. 2 mm) and is a good option for students that are just starting to look at the microscopic world.
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Ward's® Live Euglena sp. (gracilis)
Characterized by a lack of rigid cellulosic walls, instead these organisms have pellicles made of protein. They store paramylon instead of starch.
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Ward's® Live Chaos (Pelomyxa sp.) Culture
Members of the Pelomyxa genus look very much like Amoeba. Pelomyxa, however, have many nuclei, whereas Amoeba have only one.
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Live Physarum polycephalum Culture
This "many-headed" organism is a plasmodial slime mold commonly found in forests on decaying deciduous trees. Available in both plasmodial and sclerotial stages.
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Colpidium
Hay medium. Characterized by cilia; nearly all possess two types of nuclei.
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Cladophora
Marine. Filamentous; freely branched. Erdschreiber’s medium.
Characterized by green plastids and cell walls composed of cellulose.
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Didinium
Predatory. Feeds on Paramecium caudatum. Hay medium.
Characterized by cilia; nearly all possess two types of nuclei.
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Porphyridium
Marine. Unicellular. Erdschreiber’s medium.
Characterized by reddish plastids (rhodoplasts).
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Closterium littorale
Freshwater. Unicellular; homothallic strain. Basic culture solution. Characterized by green plastids and cell walls composed of cellulose.
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Synedra
Freshwater, Unicellular; pennate, with bilateral symmetry. Diatom or basic medium.
Characterized by shells (tests) made of silica, in two parts.