نتایج جستجو برای: sodium concentration

تعداد نتایج: 542652  

Journal: :The New England journal of medicine 2008
W Ray Kim Scott W Biggins Walter K Kremers Russell H Wiesner Patrick S Kamath Joanne T Benson Erick Edwards Terry M Therneau

BACKGROUND Under the current liver-transplantation policy, donor organs are offered to patients with the highest risk of death. METHODS Using data derived from all adult candidates for primary liver transplantation who were registered with the Organ Procurement and Transplantation Network in 2005 and 2006, we developed and validated a multivariable survival model to predict mortality at 90 da...

F Towhidkhah M Rezaei-Tavirani S Mahdavi SH Gharibzadeh SH Moghaddam nia

It was thought previously that cardiac muscle gap junctions provide low-resistance connections between cells and permit the local-circuit current to flow. Some evidences show that myocardial cells may not require low-resistance connections for successful propagation of the action potential (AP). It seems that some other types of mechanisms must be involved in AP propagation. In this article, we...

2001
Douglas E. Wingrove Thomas E. Gunter

Sodium-dependent calcium efflux from rat liver mitochondria has been studied as a function of mitochondrial calcium loads (2 to 40 nmol/mg) and extramitochondrial sodium concentrations (5 to 40 mM). The resulting data can be fit to a terreactant model which exhibits simultaneous kinetics (Le. both sodium and calcium must be bound simultaneously for transport to occur). The Hill coefficients for...

Journal: :AJNR. American journal of neuroradiology 1983
S K Hilal A A Maudsley H E Simon W H Perman J Bonn M E Mawad A J Silver S R Ganti P Sane I C Chien

The first in vivo nuclear magnetic resonance (NMR) images of tissue sodium in the intact animal are presented. The distribution of sodium in the normal cat's head is described. An experimental stroke was surgically induced. Sodium NMR imaging showed a pronounced focal increase in cerebral sodium concentration 9 hr after ligation of the middle cerebral artery. The method appears to be very sensi...

Journal: :Biophysical journal 2006
Chien-Jung Lo Mark C Leake Richard M Berry

The energy-transducing cytoplasmic membrane of bacteria contains pumps and antiports maintaining the membrane potential and ion gradients. We have developed a method for rapid, single-cell measurement of the internal sodium concentration ([Na(+)](in)) in Escherichia coli using the sodium ion fluorescence indicator, Sodium Green. The bacterial flagellar motor is a molecular machine that couples ...

Journal: :Clinical science 1972
M L Levin F C Rector D W Seldin

1. Erythrocyte sodium concentration and fluxes were measured in patients with acid-base disturbances, hypokalaemia and hyponatraemia. Results were similar to those obtained with normal erythrocytes exposed to artificial in vitro alterations. 2. Erythrocyte sodium content and influx varied directly with extracellular bicarbonate which appeared to influence membrane permeability. 3. Hypokalaemia ...

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