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THE EFFECT OF TEMPERATURE, FOOD, AND THE AGE OF THE CULTURE ON THE ENCYSTMENT OF DIDINIUM NASUTUM
1. Didinia encyst most readily at a temperature of 25°-30°, which is also the optimum temperature for growth and fission.2. They do not encyst in temperature so low or so high that it is injurious.Expand
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THE REACTIONS OF DIDINIUM NASUTUM (STEIN) WITH SPECIAL REFERENCE TO THE FEEDING HABITS AND THE FUNCTION OF TRICHOCYSTS
1. When Didinium comes in contact with an object, it usually responds with the avoiding reaction. In this response it always turns toward the same side, in spite of the fact that it is practicallyExpand
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Feeding, Digestion, and Starvation in Amoeba proteus (Leidy)
N UMEROUS observations on the process of feeding have been made by various investigators. Schaeffer (g916, 1917) made an intensive study of the subject and reviewed the literature to date. HeExpand
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THE FOOD-VACUOLE IN THE PERITRICHA, WITH SPECIAL REFERENCE TO THE HYDROGEN-ION CONCENTRATION OF ITS CONTENT AND OF THE CYTOPLASM
1. The feeding apparatus in the Peritricha consists of a ciliated tube (the outer portion of which is called the vestibulum and the inner the pharynx) and about ten fibers (oesophageal fibers) whichExpand
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