Enhancement of the Proton Exchange Rate in Aqueous Solution by Small Amounts of Hydrophobic Substances, as Determined from Ultrasonic Relaxation

1979 ◽  
Vol 83 (1) ◽  
pp. 43-47 ◽  
Author(s):  
C. U. Nicola ◽  
A. Labhardt ◽  
G. Schwarz
Keyword(s):  
Aqueous Solution ◽  
Exchange Rate ◽  
Proton Exchange ◽  
Hydrophobic Substances ◽  
Ultrasonic Relaxation

Enhanced adsorption removal of methyl orange from aqueous solution by nanostructured proton-containing δ-MnO2

2015 ◽  
Vol 3 (10) ◽  
pp. 5674-5682 ◽  
Author(s):  
Yan Liu ◽  
Chao Luo ◽  
Jian Sun ◽  
Haizhen Li ◽  
Zebin Sun ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Methyl Orange ◽  
Solid State ◽  
Solid State Reaction ◽  
Proton Exchange ◽  
Precipitation Method ◽  
Homogeneous Precipitation ◽  
Adsorption Removal ◽  
Homogeneous Precipitation Method ◽  
Enhanced Adsorption

Two nanostructured proton-containing δ-MnO2 (H-δ-MnO2) materials were synthesized through proton exchange for K-containing δ-MnO2 (K-δ-MnO2) nanosheets and nanoparticles prepared by the hydrothermal homogeneous precipitation method and solid-state reaction.

In Vivo Proton Exchange Rate ( k ex ) MRI for the Characterization of Multiple Sclerosis Lesions in Patients

2020 ◽  
Author(s):  
Haiqi Ye ◽  
Mehran Shaghaghi ◽  
Qianlan Chen ◽  
Yan Zhang ◽  
Sarah E. Lutz ◽  
...  
Keyword(s):  
Multiple Sclerosis ◽  
Exchange Rate ◽  
Proton Exchange

Temperaturabhängigkeit des kernmagnetischen Relaxationsverhaltens von Wasserprotonen in nativer Stärke / The Temperatur Behaviour of the Transverse Relaxation of the Protons of Water Molecules in Native Starch

1976 ◽  
Vol 31 (3-4) ◽  
pp. 306-309
Author(s):  
H.-J. Hennig ◽  
H. Lechert
Keyword(s):  
Exchange Rate ◽  
Water Content ◽  
Bound Water ◽  
Proton Exchange ◽  
Energy Of Activation ◽  
Water Molecules ◽  
Temperature Behaviour ◽  
Transverse Relaxation ◽  
Model Calculations ◽  
Exchange Processes

Measurements of the temperature behaviour of the transverse relaxation of the protons of water molecules in native potatoe starch show two sorption states and an exchange of protons between these states. From model calculations of Woessner and Zimmermann the occupation of the states and the exchange rate can be evaluated. The portion of more tightly bound water molecules comes out to be about 17%. The energy of activation of the exchange decreases with increasing water content and lies with values in the range of 26 to 31 kJ/mol distinctly below the values observed usually for proton-exchange processes in similar systems.

Proton exchange of triethylammonium ion in aqueous solution

1967 ◽  
Vol 89 (12) ◽  
pp. 2963-2967 ◽  
Author(s):  
Earle K. Ralph ◽  
Ernest. Grunwald
Keyword(s):  
Aqueous Solution ◽  
Proton Exchange
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