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Membrane strain

Figure 10. RH cycling results in steady degradation of membrane strain-to-break, but little effect on the limiting current due to hydrogen crossover.36... Figure 10. RH cycling results in steady degradation of membrane strain-to-break, but little effect on the limiting current due to hydrogen crossover.36...
Figure 18. Stress-strain curves showing the effect of RH cycling and chemical degradation on the stress-strain behavior of the MEA (left) and drastic reduction of membrane strain-to-break as a result of chemical [reprinted with permission from reference 34].34... Figure 18. Stress-strain curves showing the effect of RH cycling and chemical degradation on the stress-strain behavior of the MEA (left) and drastic reduction of membrane strain-to-break as a result of chemical [reprinted with permission from reference 34].34...
The asymmetry potential is a small potential across the membrane that is present even when the solutions on both sides of the membrane are identical. It is associated with factors such as nonuniform composition of the membrane, strains within the membrane, mechanical and chemical attack of the external surface, and the degree of hydration of the membrane. It slowly changes with time, especially if the membrane is allowed to dry out, and is unknown. For this reason, a glass pH electrode should be calibrated from day to day. The asymmetry potential will vary from one electrode to another, owing to differences in construction of the membrane. [Pg.385]

High performance textiles for geotechnical engineering 277 The membrane strain along the x-axis of indentation is ... [Pg.277]

Recent advances in the mechanics of complex buckling [5] come from a recognition that the formation of spherical surfaces of double curvature, which is the converse of drawing a map of the world on a planar surface, demands inplane (membrane) strain as well as bending. It has also been recognised that the simplest problem in this class is the buckling of a circular specimen pushed inwards at three equally spaced points. The material deforms into a dome of... [Pg.210]

Bilayer and trilayer actuators Characterizations of Electrochemical cell Experimental procedure Materials Conducting polymers (CPs) Liquid electrolyte Open air Cyclic voltammetry Dibutyltin dilaurate Electronic conducting polymers (ECPs) Interpenetrating polymer network (IPN) Poly (3,4-ethylenedioxythiophene) (PEDOT) Polypyrrole (PPY) Actuation mechanism of Electrogeneration of Electropolymerization of pyrrole monomer Oxidation and reduction reaction of Polyvinylidene fluoride (PVDF) Solid polymer electrolyte (SPE) membrane Force characterizations IPNs Load curves and metrics PVDF membrane Strain characterizations... [Pg.414]

Gilbert, J. A., A. J. Banes, G. W. Link, and G. L. Jones. 1990. Video analysis of membrane strain An apphca-tion in cell stretching. Exp Tech 14 43-5. [Pg.300]

We found that superficial cells are more susceptible to the changing loading rates than cells in the middle and deep zones. It is interesting to note, as an aside, that the maximum compressive cell strain reached values of up to 20% and tangential membrane strain values of up to 25% in superficial zone chondrocytes, while the applied nominal strain was merely 5%. [Pg.184]

The simulation results obtained in this study suggest that cell death following impact loading might be caused by apoptosis, which is linked to the disruption of transmembrane protein receptors (eg. integrins) that are disrupted by excessive cell membrane strain rates, and so become disrupted. This may lead to failure of transmembrane signaling and lead to ultimate chondrocyte death. [Pg.185]

Compaction of polymeric membranes also occurs during gas separation. Reinsch et al. (2000) described the use of UTDR to measure compaction of 175-p.m-thick (with backing) asymmetric cellulose-acetate gas separation membranes provided by Grace Davison (Littleton, CO). Figure 33.8 shows a schematic of the membrane cell used in these characterization smdies of membrane compaction during gas separation and the primary reflections of acoustic waves A and B, which correspond to the cell top-plate-gas interface and the gas-membrane interface, respectively. Compaction was studied as a function of feed gas pressure and composition. Figure 33.9 shows a plot of the membrane strain as a function of time for compaction at a transmembrane nitrogen gas pressure difference 2.8 MPa followed by a recovery cycle at atmospheric pressure for a commercial asymmetric cellulose-acetate membrane. An instantaneous strain of approximately 13% is observed followed by a small time-dependent strain. [Pg.888]

Figure 33.9 Membrane strain and transmembrane pressure difference during a compaction (at a transmembrane pressure difference of 2.8 MPa) and recovery cycle for a commercial asymmetric cellulose-acetate membrane with nitrogen as the feed gas. Figure 33.9 Membrane strain and transmembrane pressure difference during a compaction (at a transmembrane pressure difference of 2.8 MPa) and recovery cycle for a commercial asymmetric cellulose-acetate membrane with nitrogen as the feed gas.

See other pages where Membrane strain is mentioned: [Pg.262]    [Pg.10]    [Pg.39]    [Pg.34]    [Pg.80]    [Pg.223]    [Pg.80]    [Pg.129]    [Pg.248]    [Pg.135]    [Pg.404]    [Pg.182]    [Pg.185]    [Pg.185]    [Pg.152]    [Pg.1065]    [Pg.210]   
See also in sourсe #XX -- [ Pg.889 ]




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