Temperature dependence of the rates of conformational changes reported by fluorescein 5'-isothiocyanate modification of the hydrogen ion-potassium- and sodium-potassium-ATPases

Biochemistry ◽  
1991 ◽  
Vol 30 (14) ◽  
pp. 3503-3510 ◽  
Author(s):  
Larry D. Faller ◽  
Ruben A. Diaz ◽  
Georgios Scheiner-Bobis ◽  
Robert A. Farley
Keyword(s):  
Temperature Dependence ◽  
Conformational Changes ◽  
Hydrogen Ion ◽  
Sodium Potassium

The interaction of atomic particles with solid surfaces at intermediate energies IV. The energy and angular distributions of particles scattered with electric charge from polycrystalline platinum at bombarding energies of 500-5000 eV

1974 ◽  
Vol 341 (1625) ◽  
pp. 213-231 ◽  
Keyword(s):  
Charged Particles ◽  
Solid Surfaces ◽  
Hydrogen Ion ◽  
Angular Distributions ◽  
Sodium Potassium ◽  
Intermediate Energies ◽  
Polycrystalline Platinum ◽  
Composite Spectra ◽  
Energy And Angular Distributions ◽  
Bombarding Energy

The distributions in angle and energy for charged particles emitted from polycrystalline platinum bombarded with ions of hydrogen, sodium, potassium and some hydrocarbons, have been measured, in continuation of previous work (Cawthron, Cotterell & Oliphant 1969 a , b , parts I and II; 1970, part III) to lower energies. Composite spectra are presented, including ions of both signs. The flux of emitted charged particles, under hydrogen ion bombardment, is shown to contain approximately equal numbers of protons and H¯ ions, except at the lowest bombarding energies, where the latter apparently predominate. Scattering in all cases is shown to increase with bombarding energy over the range covered, the increase being near linear for hydrogen and very rapid for alkalimetal ions. In all cases the total emission of charged particles is very small at the lowest bombarding energies employed.

scholarly journals ACTION OF TRITON X-100 ON CHLOROPLAST MEMBRANES

1967 ◽  
Vol 33 (2) ◽  
pp. 395-410 ◽  
Author(s):  
David W. Deamer ◽  
Antony Crofts
Keyword(s):  
Ion Transport ◽  
Conformational Changes ◽  
Active Material ◽  
Active Species ◽  
Hydrogen Ion ◽  
Electron Microscopic ◽  
Chloroplast Membranes ◽  
Ionic Equilibrium ◽  
Hydrogen Ion Transport ◽  
Triton X

Addition of Triton X-100 to chloroplast suspensions to a final concentration of 100–200 µM causes an approximate tripling of chloroplast volume and complete inhibition of light-induced conformational changes, light-dependent hydrogen ion transport, and photophosphorylation. Electron microscopic studies show that chloroplasts treated in this manner manifest extensive swelling in the form of vesicles within their inner membrane structure. Triton was adsorbed to chloroplast membranes in a manner suggesting a partition between the membrane phase and the suspending medium, rather than a strong, irreversible binding. This adsorption results in the production of pores through which ions may freely pass, and it is suggested that the inhibition of conformational changes, hydrogen ion transport, and photophosphorylation by Triton is due to an inability of treated chloroplast membranes to maintain a light-dependent pH gradient. The observed swelling is due to water influx in response to a fixed, osmotically active species within the chloroplasts, after ionic equilibrium has occurred. This is supported by the fact that chloroplasts will shrink upon Triton addition if a nonpenetrating, osmotically active material such as dextran or polyvinylpyrrolidone is present externally in sufficient concentration (>0.1 mM) to offset the osmotic activity of the internal species.

scholarly journals Sodium-potassium interdiffusion in potassium-rich alkali feldspar II: Composition- and temperature-dependence obtained from cation exchange experiments

2014 ◽  
Vol 314 (9) ◽  
pp. 1300-1318 ◽  
Author(s):  
A.-K. Schaffer ◽  
E. Petrishcheva ◽  
G. Habler ◽  
R. Abart ◽  
D. Rhede ◽  
...  
Keyword(s):  
Temperature Dependence ◽  
Cation Exchange ◽  
Alkali Feldspar ◽  
Sodium Potassium

scholarly journals Особенности нелинейного СВЧ-отклика многозонных сверхпроводников на основе ферроселенида натрия-калия (Na-=SUB=-0.3-=/SUB=-K-=SUB=-0.7-=/SUB=-)-=SUB=-x-=/SUB=-Fe-=SUB=-2-y-=/SUB=-Se-=SUB=-2-=/SUB=-

2018 ◽  
Vol 60 (11) ◽  
pp. 2116
Author(s):  
Е.Е. Пестов ◽  
Ю.Н. Ноздрин ◽  
А.И. Елькина ◽  
Ю.C. Ерин ◽  
М. Лю ◽  
...  
Keyword(s):  
Magnetic Susceptibility ◽  
Temperature Dependence ◽  
Single Crystals ◽  
Near Field ◽  
Sodium Potassium ◽  
Third Harmonic ◽  
The Third ◽  
Microwave Microscopy ◽  
Temperature Dependences ◽  
Harmonic Power

Abstract —Temperature dependences of the third-harmonic power for the (Na_0.3K_0.7)_ x Fe_2 – _ y Se_2 sodium–potassium ferroselenide single crystals have been investigated by nonlinear near-field microwave microscopy. The temperature dependence of magnetic susceptibility at a frequency of 100 kHz for this compound has been measured. The experimental results suggest a double-gap structure of the (Na_0.3K_0.7)_ x Fe_2 – _ y Se_2 superconductor.

Fluorescence Spectroscopic Studies of (Acetamide + Sodium/Potassium Thiocyanates) Molten Mixtures: Composition and Temperature Dependence

2010 ◽  
Vol 114 (15) ◽  
pp. 5066-5081 ◽  
Author(s):  
Biswajit Guchhait ◽  
Harun Al Rasid Gazi ◽  
Hemant K. Kashyap ◽  
Ranjit Biswas
Keyword(s):  
Temperature Dependence ◽  
Spectroscopic Studies ◽  
Sodium Potassium
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