Journal ArticleDOI
Hofmeister series: the hydrolytic activity of Aspergillus niger lipase depends on specific anion effects.
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TLDR
The specific activity of lipase A (Aspergillus niger) toward the hydrolysis of p-nitrophenyl acetate (p-NPA) is shown to increase as a result of sodium salt addition according to specific ion effects of the Hofmeister series, showing explicitly that the HofMeister effect is due to the different specific interactions between anions and the enzymatic surface.Abstract:
The specific activity of lipase A (Aspergillus niger) toward the hydrolysis of p-nitrophenyl acetate (p-NPA) is shown to increase as a result of sodium salt addition according to specific ion effects of the Hofmeister series. This shows explicitly that the Hofmeister effect is due to the different specific interactions between anions and the enzymatic surface.read more
Citations
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Water as an Active Constituent in Cell Biology
TL;DR: The recent confirmation that there is at least one world rich in organic molecules on which rivers and perhaps shallow seas or bogs are filled with nonaqueous fluidsthe liquid hydrocarbons of Titan now bring some focus, even urgency, to the question of whether water is indeed a matrix of life.
Journal ArticleDOI
Interactions between macromolecules and ions: The Hofmeister series.
Yanjie Zhang,Paul S. Cremer +1 more
TL;DR: It is demonstrated that bulk water structure is not central to the Hofmeister effect, and models are being developed that depend upon direct ion-macromolecule interactions as well as interactions with water molecules in the first hydration shell of the macromolecules.
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Effect of ions on the structure of water: structure making and breaking.
TL;DR: Results from Diffraction Experiments 1351 and results from Spectroscopic Measurements 1354 4.3.1.
Journal ArticleDOI
Hofmeister phenomena: an update on ion specificity in biology.
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Chemistry of Hofmeister anions and osmolytes.
Yanjie Zhang,Paul S. Cremer +1 more
TL;DR: A mechanism for specific ion effects is elucidated for aqueous systems containing charged and uncharged polymers, polypeptides, and proteins and a hydrogen-bonding mechanism is tested for the urea denaturation of proteins with some of these same systems.
References
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Journal ArticleDOI
Zur Lehre von der Wirkung der Salze
Journal ArticleDOI
The Hofmeister effect and the behaviour of water at interfaces.
TL;DR: The first general, detailed qualitative molecular mechanism for the origins of ion-specific (Hofmeister) effects on the surface potential difference at an air-water interface is proposed; this mechanism suggests a simple model for the behaviour of water at all interfaces, regardless of whether the non-aqueous component is neutral or charged, polar or non-polar.
Journal ArticleDOI
Charge density-dependent strength of hydration and biological structure
TL;DR: The standard heat of solution of a crystalline alkali halide is shown here to be negative (exothermic) only when one ion is a kosmotrope and the ion of opposite charge is a chaotrope, which suggests that inner sphere ion pairs are preferentially formed between oppositely charged ions with matching absolute enthalpies of hydration.
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‘Zur Lehre von der Wirkung der Salze’ (about the science of the effect of salts): Franz Hofmeister's historical papers
TL;DR: In a seminal series of papers, Franz Hofmeister, Professor of Pharmacology at the University of Prague, was the first to study specific ion effects systematically as discussed by the authors, which stands in the scheme of things in importance much as did the work of Mendel to genetics.
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The present state of affairs with Hofmeister effects
TL;DR: The present state of affairs, theory and experiment with Hofmeister effects is reviewed in this article, where the authors present a review of the literature and experiment results of their work.
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Interactions between macromolecules and ions: The Hofmeister series.
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