نتایج جستجو برای: ion concentrations

تعداد نتایج: 498727  

2016
Francesca Cugia Silvia Sedda Federica Pitzalis Drew F. Parsons Maura Monduzzi Andrea Salis

Hofmeister (ion specic) effects are phenomena related to the chemical nature of electrolytes. Although they are ubiquitous in all chemical, colloidal, and biological systems, they cannot be quantied in terms of the conventional physico-chemical theories (i.e. Debye–Hückel, DLVO, etc.). These are limit theories, based on electrostatics, and valid at innite dilution only. The gap between theor...

Journal: :Protein engineering 2003
Gabriela Barreiro Cristiano Ruch Werneck Guimarães Ricardo Bicca de Alencastro

To understand the mechanisms of Na(+)/Li(+) permeation at submicromolar Ca(2+) concentrations, Na(+)/Li(+) blocking at higher Ca(2+) concentrations (10(-6)-10(-4) M) and Ca(2+) permeation at millimolar Ca(2+) concentrations, we used our recently described L-type calcium channel model. For this purpose, we obtained potential of mean force (pmf) curves for the position change of one Na(+) and one...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2017
Karl F Herold R Lea Sanford William Lee Olaf S Andersen Hugh C Hemmings

General anesthetics have revolutionized medicine by facilitating invasive procedures, and have thus become essential drugs. However, detailed understanding of their molecular mechanisms remains elusive. A mechanism proposed over a century ago involving unspecified interactions with the lipid bilayer known as the unitary lipid-based hypothesis of anesthetic action, has been challenged by evidenc...

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