Search results for "PRESSION OSMOTIQUE"

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Involvement of osmotic cell shrinkage on the proton extrusion rate in Saccharomyces cerevisiae

2001

Saccharomyces cerevisiae has been subjected to hyperosmotic shocks by using permeating (sorbitol, xylitol, glycerol, NaCl) and nonpermeating (PEG 600) solutes. The proton extrusion rate decreased as the osmotic pressure increased, whichever solute was used. However, the total inhibition of the cellular H+ extrusion depended on the solute used. A total inhibition was observed at about 20 MPa with glycerol, xylitol and sorbitol. With PEG 600, a total inhibition of extracellular acidification was obtained at 8.5 MPa. NaCl, with an extracellular pressure of 37.8 MPa (near saturation), did not completely inhibit the extracellular acidification. These results showed that the total inhibition of p…

0106 biological sciencesOsmotic shockPRESSION OSMOTIQUESaccharomyces cerevisiaeXylitol01 natural sciencesMicrobiologyPermeability03 medical and health scienceschemistry.chemical_compoundOsmotic Pressure010608 biotechnologyGlycerolExtracellularOsmotic pressure[SDV.MP] Life Sciences [q-bio]/Microbiology and ParasitologyComputingMilieux_MISCELLANEOUS030304 developmental biology0303 health sciencesChromatographyOsmotic concentrationCell MembraneOsmolar ConcentrationGeneral MedicineCulture Media[SDV.MP]Life Sciences [q-bio]/Microbiology and ParasitologychemistryOsmoregulationSorbitolProtonsFood Science
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Water entry into detached root systems saturates with increasing externally applied pressure ; a result inconsistent with models of simple passive di…

2002

International audience

PRESSION OSMOTIQUE[SDV.BV]Life Sciences [q-bio]/Vegetal Biology[SDV.BV] Life Sciences [q-bio]/Vegetal BiologyComputingMilieux_MISCELLANEOUS
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