Kinetics and thermodynamic transitions of N-acetyl-?-D-glucosaminidase A and B in free and bound forms: Role of cellulose ion-exchangers

1989 ◽  
Vol 86 (1) ◽  
Author(s):  
G.S. Gupta ◽  
Ritu Raina
Keyword(s):  
Ion Exchangers ◽  
Kinetics And Thermodynamic

The role of organic diluents in the aspects of equilibrium, kinetics and thermodynamic model for silver ion extraction using an extractant D2EHPA

2015 ◽  
Vol 388 ◽  
pp. 22-30 ◽  
Author(s):  
Thidarat Wongsawa ◽  
Niti Sunsandee ◽  
Anchaleeporn Waritswat Lothongkum ◽  
Ura Pancharoen ◽  
Suphot Phatanasri
Keyword(s):  
Thermodynamic Model ◽  
Silver Ion ◽  
Ion Extraction ◽  
Kinetics And Thermodynamic

scholarly journals Role of PDZK1 in membrane expression of renal brush border ion exchangers

2005 ◽  
Vol 102 (37) ◽  
pp. 13331-13336 ◽  
Author(s):  
R. B. Thomson ◽  
T. Wang ◽  
B. R. Thomson ◽  
L. Tarrats ◽  
A. Girardi ◽  
...  
Keyword(s):  
Brush Border ◽  
Ion Exchangers ◽  
Membrane Expression ◽  
Renal Brush Border

scholarly journals Zeolites application in terrestrial and space industry – a review

2020 ◽  
Vol 32 ◽  
pp. 209-223
Author(s):  
Adelina Miteva ◽  
Valeria Stoyanova
Keyword(s):  
Chemical Properties ◽  
Waste Materials ◽  
Ion Exchangers ◽  
Science And Engineering ◽  
Space Industry ◽  
Synthetic Zeolites ◽  
The Impact ◽  
And Chemical Properties

This brief overview presents an attempt to systematize some of the available historical and recent data on the impact of zeolite science and engineering on the progress of various areas of Earth and Space development. The basic structural and chemical properties of natural and synthetic zeolites are presented. Valuable applications of the zeolites, such as catalysts, gas adsorbers and ion exchangers are also included. The most commonly used methods for the synthesis of zeolites from different materials are presented, as well as some Bulgarian developments for the reuse of waste materials to zeolites. The important role of zeolites as an indispensable material for improving the quality of soil, fuels, water, air, etc., required for the needs of orbiting space stations and spacecrafts has been confirmed by typical examples.

Role of Ion Exchange in Release of Biogenic Amines

Physiology ◽  
1989 ◽  
Vol 4 (2) ◽  
pp. 68-71 ◽  
Author(s):  
B Uvnas ◽  
C-H Aborg
Keyword(s):  
Mast Cells ◽  
Ion Exchange ◽  
Biogenic Amines ◽  
Chromaffin Cells ◽  
Ion Exchangers ◽  
Kinetics Of ◽  
Kinetics Of Ion Exchange

Mast cells, chromaffin cells, and nerves contain granule materials that have the characteristics of weak ion exchangers. Biogenic amines are stored in and released from these granules according to kinetics of ion exchange. Studies on isolated mast cells and on adrenals in vivo suggest that amines are released by ion exchange: cytoplasmic K+ being the releasing ion in the preexocytotic phase and Na+ in the exocytotic phase.

The Ion Exchange Behavior of Oxides

2016 ◽  
Author(s):  
Bruce C. Bunker ◽  
William H. Casey
Keyword(s):  
Ion Exchange ◽  
Total Mass ◽  
Exchange Capacity ◽  
Nuclear Wastes ◽  
Ion Exchangers ◽  
Ion Exchange Capacity ◽  
Inorganic Ion ◽  
Exchange Selectivity ◽  
Oxide Ion

Oxides comprise the most common ion-exchange materials on our planet, with the clay minerals alone, formed by the weathering of rock, having a total mass of around 1025 g. This mass represents almost one-third of the total mass of Earth’s crust and is more than six times the mass of Earth’s oceans. These fine-grained ion exchange materials play a major role in mediating the concentrations of ionic species found in freshwater, groundwater, and our oceans (see Chapter 18). Oxide ion exchangers are also of critical importance in removing contaminants from the environment. Nowhere is this role more apparent than in the removal and sequestration of radioactive elements such as 137Cs, 90Sr, and 99Tc, which are serious hazards present in nuclear wastes. Oxide ion exchangers exhibit several properties that make them materials of choice for treating nuclear wastes, including high selectivity, enhanced stability to radiation damage relative to organic exchangers, and the potential as materials to be condensed further into solid waste after they are loaded with radioactive species. Oxide exchangers are extremely useful for extracting valuable cations from complex fluids, such as the lithium used in our highest energy density batteries. Ion exchange also represents a pathway for creating unique nanomaterials, with applications including battery separators, catalysts, optical materials, magnets, and materials for drug delivery. Oxides materials can exhibit exceptional properties as both cation and anion exchangers for a wide range of separation and water treatment technologies. Although the total ion-exchange capacity of an oxide is important for some applications, such as the deionization of water, separations require the use of oxides and hydroxides having the highest degree of ion-exchange selectivity. For selectivity, oxides must be designed with specific sites that exhibit a much higher affinity for one ion than any other, which requires much more sophistication than just generating a net charge. Here, we describe the key factors that control both the capacity and selectivity of inorganic ion exchangers, including (1) the role of acid–base reactions in controlling surface charge and ion-exchange capacity, (2) the role of local charge distributions in determining ion-exchange selectivity, and (3) the effect of shape and selective solvation on enhancing that selectivity.

Role of dactinomycin in the improved survival of children with Wilms' tumor

JAMA ◽  
1966 ◽  
Vol 195 (12) ◽  
pp. 1005-1009 ◽  
Author(s):  
D. J. Fernbach
Keyword(s):  
Wilms Tumor
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