Titlebook: Hydra: Research Methods; Howard M. Lenhoff Book 1983 Springer Science+Business Media New York 1983 cell.controlling.cytology.development.e

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Culturing Hydra of the Same Species but of Different Sizes fields it is useful to be able to modify them. Controlling hydra size by varying the amounts of food given to them provides an experimental method for manipulating the sizes and properties of patterning fields, and also for obtaining hydra of particular sizes for experiments.

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menopause

Preparing Hydra for Freeze-Fracture and Freeze-Etchingid freezing of tissues, either with or without partial sublimation of ice (etching). By evaporating a film of pure carbon on the exposed surface, a replica of the cell surface is obtained which reveals its intimate contours. Contrast is obtained by shadowing the exposed surface with evaporated plati

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resilience

Howard M. Lenhoff advantage of a metal-on-metal implant is the improved wear characteristics seen both in vitro on wear simulators and in vivo with retrieved implants. All bearings have disadvantages, and a metal-on-metal bearing is no exception. Concerns exist regarding the generation of metal ions seens in both th

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