Membrane parameters at the respective resting potentials in low, normal, and high extracellular potassium solutions were determined in intercostal muscle fibers from 15 patients with no known neuromuscular disease. In synthetic interstitial fluid (normal potassium concentration 3.5 mmol/liter), we found the following mean values: resting membrane potential RP = -83.3 mV, space constant lambda =...

â a model is developed for separation of multicomponent gas mixtures in a countercurrent hollow fiber membrane module. while the model’s solution in countercurrent module usually involves in a time consuming iterative procedure, a proper initial guess is proposed for beginning the calculation and a simple procedure is introduced for correcting the guesses, hereby the cpu time is decreased ess...

The aptitude of a hollow-fiber membrane reactor to determine lipase kinetics was investigated using the hydrolysis of triacetin catalyzed by lipase from Canadida cylindracea as a model system. The binding of the lipase to the membrane appears not to be very specific (surface adsorption), and probably its conformation is hardly altered by immobilization, resulting in an activity comparable to th...

We propose a theory for the force exerted by a fluctuating membrane on a polymer rod tip. Using statistical mechanical methods, the expression for the generated force is written in terms of the distance of the rod tip from the membrane "frame." We apply the theory in calculating the stall force and membrane displacement required to cease the growth of a growing fiber induced by membrane fluctua...

A microporous polypropylene (PP) hollow fiber membrane contactor was used as a reactor to biodegrade phenol in high-salinity solutions by Pseudomonas putida CCRC14365 at 30C. Suspended cells grew only at a NaCl concentration below 2.5 wt%. On the other hand, cells within hollow fibers completely degraded 0.5 g/L of phenol in solution containing NaCl up to 8.6 wt%, likely due to the fact that th...

Cytoskeletal organization in organ cultured embryonic chicken lens was affected by isoproterenol treatment. Immunofluorescent localization of a 49 kD fiber cell-specific cytoskeletal protein showed a cytoplasmic and membrane localization in control lenses. Following isoproterenol treatment, fluorescence was predominantly membrane-associated. Changes in 49 kD distribution as determined by immuno...

background: leachatecontaining high levels of organic pollution with ammonia, halogenatedhydrocarbons, heavy metals and inorganic salts. among the various methods fortreating leachate, has been developed membrane processes so that a morebiological process of membrane processes is used for separation of solid -liquid. the aimof this study was to evaluate the efficiency of membrane bioreactor eff...