منابع مشابه
The Mechanism of Isotonic Water Transport
The mechanism by which active solute transport causes water transport in isotonic proportions across epithelial membranes has been investigated. The principle of the experiments was to measure the osmolarity of the transported fluid when the osmolarity of the bathing solution was varied over an eightfold range by varying the NaCl concentration or by adding impermeant non-electrolytes. An in vit...
متن کاملIsotonic Water Transport in Secretory Epithelia , 12
The model proposed by Diamond and Bossert [1] for isotonic water transport has received wide acceptance in recent years. It assumes that the local driving force for water transport is a standing osmotic gradient produced in the lateral intercellular spaces of the epithelial cell layer by active solute transport. While this model is based on work done in absorptive epithelia where the closed to ...
متن کاملIsotonic Conditional Random Fields and Local Sentiment Flow
We examine the problem of predicting local sentiment flow in documents, and its application to several areas of text analysis. Formally, the problem is stated as predicting an ordinal sequence based on a sequence of word sets. In the spirit of isotonic regression, we develop a variant of conditional random fields that is wellsuited to handle this problem. Using the Möbius transform, we express ...
متن کاملFluid transport and ion fluxes in mammalian kidney proximal tubule: a model analysis of isotonic transport.
AIM By mathematical modelling, we analyse conditions for near-isotonic and isotonic transport by mammalian kidney proximal tubule. METHODS The model comprises compliant lateral intercellular space (lis) and cells, and infinitely large luminal and peritubular compartments with diffusible species: Na+, K+, Cl- and an intracellular non-diffusible anion. Unknown model variables are solute concent...
متن کاملThe Role of Paracellular Pathways in Isotonic Fluid Transport *
Paracellular pathways across "leaky" epithelia are the major route for transepithelial ionic diffusion. The permselective properties of these pathways suggest that they offer a watery environment through which ions diffuse in their hydrated forms. There is also suggestive evidence that, at least in some tissues, paracellular pathways provide a significant route for transepithelial water flow in...
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ژورنال
عنوان ژورنال: Journal of Membrane Biology
سال: 2005
ISSN: 0022-2631,1432-1424
DOI: 10.1007/s00232-005-0817-9