Zobrazeno 1 - 10
of 28
pro vyhledávání: '"Robert D. Prusch"'
Autor:
Victor L. Thompson, Robert D. Prusch
Publikováno v:
Cell & Tissue Research. 279:359-364
In an attempt to define the transmembrane-signal pathway used to couple external phagocytotic signals with effectors in the cell interior, the effects of diacylglycerol (DG) and related substances were examined in Amoeba proteus. DGs are highly chemo
Autor:
Robert D. Prusch, Sandra M. Wells
Publikováno v:
Cell and Tissue Research. 261:445-450
Binding of the tripeptide n-formylmethionyl-leucylphenylalanine (NFMLP) to phagocytic receptors on the surface of Amoeba proteus was examined. Peptide-binding is reversible and demonstrates saturation kinetics. The receptors for phagocytosis are inte
Autor:
J.Clayton Roscoe, Robert D. Prusch
Publikováno v:
Tissuecell. 25(1)
Cytoplasmic levels of cAMP in Amoeba proteus were measured utilizing radioimmunoassays under control conditions and when stimulated by inducers of either pinocytosis or phagocytosis. In control cells, cytoplasmic cAMP levels were approximately 0.39 p
Autor:
Robert D. Prusch, Carol Hall
Publikováno v:
The Biological Bulletin. 154:292-301
1. The diffusional water permeability of the isolated mantle tissue from a series of marine, and one freshwater, species of lamellibranch molluscs was determined.2. The water permeability of the mantle tissue was generally correlated with the habitat
Autor:
Robert D. Prusch
Publikováno v:
Comparative Biochemistry and Physiology Part A: Physiology. 54:287-290
o 1. Tissue osmolality, Na+, K+, and Cl− concentrations, diffusional water permeability and undirectional ion fluxes were measured in the freshwater flatworm Dugesia dorotocephala. 2. Tissue levels of Na+, K+, and Cl− are all higher than the corr
Autor:
Robert D. Prusch
Publikováno v:
Journal of Experimental Biology. 68:35-43
The K+ and Cl− levels and osmotic concentration of the tube feet fluid in intact starfish (Asterias forbesi) are higher than that in the external sea water or perivisceral (coelomic) fluid. The increase in K+ in the fluid in the tube feet lumen is
Autor:
Robert D. Prusch, Philip A. Vedovatti
Publikováno v:
Journal of Comparative Physiology B. 159:287-292
Calcium controls the level of phagocytosis inAmoeba proteus which is inhibited by substances such as verapamil and flunarazine which interfere with Ca++ movements in a variety of cell systems. Calcium ion movements in amoebae under control conditions
Autor:
Robert D. Prusch, T Otter
Publikováno v:
Comparative Biochemistry and Physiology Part A: Physiology. 57:87-92
1. 1. The body wall of the earthworm (Lumbricus terrestris) and the freshwater leech (Haemopsisgrandis) can be isolated and mounted in a chamber with pondwater outside and Ringers inside. 2. 2. Under these condition, a transepithelial potential (TEP)
Autor:
Jo A. Hannafin, Robert D. Prusch
Publikováno v:
The Journal of General Physiology
A preliminary investigation of the distribution of cellular calcium in Amoeba proteus was undertaken. Total cellular calcium under control conditions was found to be 4.59 mmol/kg of cells. When the external Ca++ concentration is increased from the co
Autor:
Jo A. Hannafin, Robert D. Prusch
Publikováno v:
The Journal of General Physiology
The relationship between Ca++ and pinocytosis was investigated in Amoeba proteus. Pinocytosis was induced with 0.01% alcian blue, a large molecular weight dye which binds irreversibly to the cell surface. The time-course and intensity of pinocytosis