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Efficiency of Ion Transport in Biological Systems [PDF]

Nature, 1957
THE idea that active ion transport is linked directly to an electron-transferring respiratory system was first expressed clearly by Stiehler and Flexner1 and has since been elaborated by other investigators2,3. On the basis of this hypothesis, the maximum value of the ratio (ion pairs transported/oxygen consumed) = 4 4,5, since four electrons are ...
J. F. Sutcliffe, D. P. Hackett
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Transport Mechanisms of Biological Colloids^a

Annals of the New York Academy of Sciences, 1986
An effort was made to distinguish among various mechanisms by which colloidal particles can be transported through liquid solutions. Figures 1-3 provide a visual (Figure: see text) summary of these differences. The various "phoretic" motions (electrophoresis, diffusiophoresis, osmophoresis) differ from sedimentation in that the driving forces operate ...
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Water Transport in Biological and Artificial Membranes

Archives of Internal Medicine, 1972
The transport of water across biological membranes is a process of considerable theoretical and practical importance. Classical interpretations of the mechanism of this transport have centered around the hypothesis of aqueous membrane pores. However, more recent evidence indicates that the possible presence of unstirred layers adjacent to membranes ...
Thomas E. Andreoli, James A. Schafer
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Iron Transport Across Biologic Membranes

Nutrition Reviews, 2009
Iron is essential for life, but is toxic in excess. Nearly all organisms have therefore developed regulated mechanisms for efficient transport of iron into cells. This paper reviews the current understanding of iron transport, focusing on valuable lessons from studies of yeast iron transport and the discovery of the first mammalian transmembrane iron ...
Mark D. Fleming, Nancy C. Andrews, Hiromi Gunshin   +2 more
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A transport for a biological sciences department

Journal of Biological Education, 1980
The article describes a Bedford high top van converted to a multipurpose laboratory and transport for a college biological sciences department.
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Biological Transport

Biological Transport of Radiotracers, 2020
L. Colombetti
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Passive water transport in biological pores

2002
Three kinds of membrane proteins have been shown to have water channels properties: the aquaporins, the cotransporters, and the uniports. A molecular-kinetic description of water transport in pores is compared to analytical models based on macroscopic parameters such as pore diameter and length. The use and limitations of irreversible thermodynamics is
Zeuthen, Thomas, Macaulay, Nanna
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Biological Transfer and Transport Processes

2018
This chapter explores the biological processes that will be discussed with respect to four major classes of marine contaminants: heavy metals, artificial radionuclides, chlorinated hydrocarbons, and petroleum hydrocarbons. Obviously, much more is known about biological transport for some types of contaminants than others, and this is reflected by their
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Inorganic carbon transport in biological systems

Comparative Biochemistry and Physiology Part B: Comparative Biochemistry, 1988
1. The flux of inorganic carbon (Ci) is an important biological process. 2. CO2 crosses membranes through passive diffusion and, perhaps active transport while HCO3- crosses membranes via facilitated diffusion and active transport mechanisms. 3. Carbonic anhydrase is ubiquitous and enhances the flux of Ci. 4.
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A Model System for Biological Water Transport [PDF]

Nature, 1962
John R. Macintosh, Peter F. Curran
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