Results 71 to 80 of about 686,862 (199)

Electrochemically Modulated Permeability of Poly(aniline) and Composite Poly(aniline)−Poly(styrenesulfonate) Membranes [PDF]

, 2006
The influence of oxidation state on the permeability of several probe molecules through conducting polymer membranes comprising composites of poly(aniline) and poly(styrenesulfonate) was examined in aqueous solution.
Hillier, Andrew, Hillier, Andrew, Pile, D., Zhang, Y.   +3 more
core   +3 more sources

Structure and permeability of ion-channels by integrated AFM and waveguide TIRF microscopy. [PDF]

, 2014
Membrane ion channels regulate key cellular functions and their activity is dependent on their 3D structure. Atomic force microscopy (AFM) images 3D structure of membrane channels placed on a solid substrate.
Arce, Fernando Teran, Cohen, Daniel A, Lal, Ratnesh, Patel, Nirav R, Quist, Arjan P, Ramachandran, Srinivasan   +5 more
core   +2 more sources

Observations on the physiological development of trout eggs [Translation from: Roux. Arch. f. Entwicklungsmechanik der Organismen, 114. 771, 1929] [PDF]

, 1929
The osmotic pressure of the perivitelline fluid and the yolk of trout (Salmo trutta) eggs were measured separately by the Drucker-Schrein method. The permeability of the egg membrane and the variations in the osmotic pressure of the eggs when placed in ...
Svetlov, P.
core  

Ion-channel-like behavior in lipid bilayer membranes at the melting transition

, 2010
It is well known that at the gel-liquid phase transition temperature a lipid bilayer membrane exhibits an increased ion permeability. We analyze the quantized currents in which the increased permeability presents itself. The open time histogram shows a "-
B. Hille, D. Colquhoun, J. B. Bassingthwaighte, J. C. Weaver, Jill Gallaher, Katarzyna Wodzińska, Martin Bier, T. Heimburg, Thomas Heimburg   +8 more
core   +1 more source

Differential Behavior of Salt and Organic Matter Passage in 2-Pass RO Systems for Ultrapure Water Production

Separations
This study investigates how membrane transport characteristics affect permeate quality in a 2-pass reverse osmosis (RO) system for ultrapure water (UPW) production. Unlike conventional RO, UPW-RO operates in an ultra-low concentration range.
Changryeol Oh, Dongkeon Kim, Suhan Kim
doaj   +1 more source

Statistical Mechanics of Membrane Protein Conformation: A Homopolymer Model

, 1998
The conformation and the phase diagram of a membrane protein are investigated via grand canonical ensemble approach using a homopolymer model. We discuss the nature and pathway of $\alpha$-helix integration into the membrane that results depending upon ...
A. Baumgärtner, A. M. Gutin, B. H. Zimm, C. Branden, D. F. H. Wallach, D. K. Klimov, D. Poland, E. A. DiMarzio, E. Eisenriegler, F. W. Wiegel, I. M. Lifshitz, J. K. Myers, J. Lenard, J. Wang, J.-L. Popot, K. S. J. Nordholm, M. A. Lemmon, M. A. Lemmon, M. Ueda, P. D. Ross, P. G. Wolynes, P. J. Park, Pyeong Jun Park, R. E. Jacobs, R. Henderson, R. Lipowsky, T. Garel, V. S. Pande, W. Sung, W. Sung   +29 more
core   +2 more sources

MultiCycPermea: accurate and interpretable prediction of cyclic peptide permeability using a multimodal image-sequence model

BMC Biology
Background Cyclic peptides, known for their high binding affinity and low toxicity, show potential as innovative drugs for targeting “undruggable” proteins. However, their therapeutic efficacy is often hindered by poor membrane permeability.
Zixu Wang, Yangyang Chen, Yifan Shang, Xiulong Yang, Wenqiong Pan, Xiucai Ye, Tetsuya Sakurai, Xiangxiang Zeng   +7 more
doaj   +1 more source

CO2 Permeability of Biological Membranes and Role of CO2 Channels

Membranes, 2017
We summarize here, mainly for mammalian systems, the present knowledge of (a) the membrane CO2 permeabilities in various tissues; (b) the physiological significance of the value of the CO2 permeability; (c) the mechanisms by which membrane CO2 ...
Volker Endeward, Mariela Arias-Hidalgo, Samer Al-Samir, Gerolf Gros   +3 more
doaj   +1 more source

Optimization of experimental conditions for skin-PAMPA measurements

ADMET and DMPK, 2020
In recent years, the parallel artificial membrane permeability assay (PAMPA) has been extended for prediction of skin permeation by developing an artificial membrane which mimics the stratum corneum structure, skin-PAMPA.
Sara Soriano-Meseguer, Elisabet Fuguet, Adriana Port, Martí Rosés   +3 more
doaj   +1 more source

Single-channel recordings from cultured human retinal pigment epithelial cells. [PDF]

, 1988
We have applied patch-clamp techniques to on-cell and excised-membrane patches from human retinal pigment epithelial cells in tissue culture. Single-channel currents from at least four ion channel types were observed: three or more potassium-selective ...
Fain, GL, Fox, JA, Pfeffer, BA
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