Results 231 to 240 of about 199,024 (258)
Some of the next articles are maybe not open access.
Amoeba proteus : Studying the Contractile Vacuole by Micropuncture
Science, 1963Direct measurements of the freezing point depression of the protoplasm and of the fluid from the contractile vacuole of fresh-water amoebae showed that the fluid in the vacuole is distinctly hypoosmotic to the protoplasm. Fourteen samples of protoplasm from amoebae, placed in a medium with a milliosmolality of 7, had an average osmolality of 101 ...
Bodil Schmidt-Nielsen +1 more
openaire +3 more sources
Fine Structure of the Contractile Vacuole Pore in Paramecium*
The Journal of Protozoology, 1973SYNOPSISThe pore through which a Paramecium contractile vacuole communicates with the external environment is a 1.2 μm long and 1 μm diameter cylindrical orifice in the pellicle. During diastole, the vacuole:pore junction is closed by a substantial diaphragm which parts to the side at systole.
openaire +3 more sources
Activity of contractile vacuole in the parasitic ciliate,Balantidium coli
Experientia, 1970Chez leBalantidium coli, la vacuole contractile se remplit graduellement et s'agrandit. Apres une phase stationnaire, pendant laquelle elle reste irreguliere en apparence, elle se gonfle entierement, devient spherique, et puis s'affaisse subitement et expulse son contenu. L'affaissement est tres rapide et ne prend qu'une fraction de seconde.
openaire +4 more sources
The Role of the Contractile Vacuole in the Osmoregulation of Tetrahymena pyriformis*
The Journal of Protozoology, 1973SYNOPSISThe relationship of cell size and contractile vacuole efflux to osmotic stress was studied in Tetrahymena pyriformis strain W, after transfer into fresh solutions iso‐ or hypoosmotic to the growth medium. Microscopic measurements of the cell and contractile vacuole dimensions, made with an image‐sharing ocular at 27 C, allowed the calculation ...
openaire +3 more sources
Effects of Hypertonic Media on the Contractile Vacuoles of Protozoa
Nature, 1936IT has long been suspected that the contractile vacuoles of Protozoa maintain the internal osmotic pressure of the organism above that of the external medium, and it has been argued that, if this is correct, the rate of vacuolar output should be reduced when the external osmotic pressure is raised.
openaire +2 more sources
The Contractile Vacuole of Parazoa and Protozoa, and the Golgi Apparatus
Nature, 1955Felix, Gatenby Jb, Albert J. Dalton
openaire +3 more sources
Contractile Vacuole of Euplotes
Transactions of the American Microscopical Society, 1933openaire +2 more sources