Residual conductivity

In general, pores swell nonuniformly. As a simplification, fhe random network was assumed to consist of fwo types of pores. In fhis fwo-stafe model, nonswollen or "dry" pores (referred to later as "red" pores) permit only a small residual conductance due to tightly bound surface water, which solvates the charged surface groups. Swollen or "wet" pores (referred to later as "blue" pores) contain extra water in the bulk, allowing them to promote the high bulk-like conductance. Water uptake by the membrane corresponds to the swelling of wef pores and to the increase of their relative fraction. 

Fig. 17. Single-channel conductance of neonatal rat heart cells. Note the residual conductance [Valiunas et al., 1997]. The Vj applied was 50 mV. 

An essential residue. Conduction of protons by the Fg unit of ATP synthase is blocked by modification of a single side chain by dicyclohexylcarbodiimide. What are the most likely targets of action of this reagent How might you use site-specific mutagenesis to determine whether this residue is essential for proton conduction ... 

For jp > jpC the membrane potential drop increases strongly, being inversely proportional to the residual conductivity crr, which is usually small compared to... 

Nonlinear corrections Nonlinear corrections in current-voltage relations are only relevant in the proximity of y pC. Well below jpc the resistance 9ts = L/cre s of the saturated state determines the membrane performance. Above ypc the residual conductivity of dehydrated domains determines the performance. 

Substantial residual conductivities as T + O have also been observed in... 

These compounds have a residual conductivity Oi 35k> 10000 Q cm [98]. According to the treatment reported in refs [117], [3], the superconductivity in organic systems requires a minimum residual conductivity of 6000 Q an, a value consistent with the theoretical estimation based on the Anderson localization. Con unds (13) and (14) could be candidates for superconductivity as they fulfill... 

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