scholarly journals Polymeric Assembly of Gluten Proteins in an Aqueous Ethanol Solvent

2014 ◽  
Vol 118 (38) ◽  
pp. 11065-11076 ◽  
Author(s):  
Mohsen Dahesh ◽  
Amélie Banc ◽  
Agnès Duri ◽  
Marie-Hélène Morel ◽  
Laurence Ramos
Keyword(s):  
Aqueous Ethanol ◽  
Gluten Proteins ◽  
Aqueous Ethanol Solvent

Effects of polyethylene glycol on stability of α-chymotrypsin in aqueous ethanol solvent

2004 ◽  
Vol 317 (2) ◽  
pp. 610-613 ◽  
Author(s):  
L.M Simon ◽  
M Kotormán ◽  
A Szabó ◽  
G Garab ◽  
I Laczkó
Keyword(s):  
Polyethylene Glycol ◽  
Aqueous Ethanol ◽  
Aqueous Ethanol Solvent

Thermodynamic insights on the liquid-liquid fractionation of gluten proteins in aqueous ethanol

2021 ◽  
pp. 107142
Author(s):  
Marie-Hélène Morel ◽  
Justine Pincemaille ◽  
Laure Lecacheux ◽  
Paul Menut ◽  
Laurence Ramos ◽  
...  
Keyword(s):  
Aqueous Ethanol ◽  
Gluten Proteins ◽  
Liquid Fractionation

SECONDARY KINETIC ISOTOPE EFFECTS IN BIMOLECULAR NUCLEOPHILIC SUBSTITUTIONS: I. DEUTERIUM EFFECTS IN THE BUNTE SALT REACTION

1964 ◽  
Vol 42 (4) ◽  
pp. 851-855 ◽  
Author(s):  
K. T. Leffek
Keyword(s):  
Aqueous Ethanol ◽  
Isotope Effects ◽  
Kinetic Isotope Effects ◽  
Sodium Thiosulphate ◽  
Deuterium Isotope Effect ◽  
Nucleophilic Substitutions ◽  
Kinetic Isotope ◽  
Deuterium Isotope Effects ◽  
Rate Ratios ◽  
Aqueous Ethanol Solvent

The secondary deuterium isotope effects have been measured for the reaction between sodium thiosulphate and α-deuterated methyl, ethyl, and n-propyl bromide, and also for β- and γ-deuterated n-propyl bromide, in aqueous ethanol solvent. The α-deuterium isotopic rate ratios (kH/kD) are all greater than unity. These unexpected results are discussed with respect to the suggested use of the α-deuterium isotope effect as a test of mechanism in nucleophilic substitutions.

scholarly journals Amphoteric behavior of di-2-pyridyl ketone benzoylhydrazone in ethanol-water mixtures

2000 ◽  
Vol 25 (0) ◽  
pp. 63-76 ◽  
Author(s):  
Ivanise GAUBEUR ◽  
Maura Vincenza ROSSI ◽  
Koshun IHA ◽  
Maria Encarnación Vázquez SUÁREZ-IHA
Keyword(s):  
Aqueous Ethanol ◽  
Transition Metal Ions ◽  
Medium Composition ◽  
Ionization Constants ◽  
Solvent Mixtures ◽  
Solubility In Water ◽  
Low Solubility ◽  
Higher Sensitivity ◽  
Aqueous Ethanol Solvent

The ligand di-2-pyridyl ketone benzoylhydrazone (DPKBH) is widely used for the determination of transition metal ions in environmental samples. Due to its low solubility in water it is used in aqueous-ethanol (1:1) solvent and for higher sensitivity the pH must be properly adjusted. The properties of DPKBH solutions must be known at different ethanol-water percentages in order to achieve higher sensitivity and/or selectivity for metal analysis. The acid-base behavior of this reagent in aqueous-ethanol solvent and the dissociation/ionization constants (pK1 and pK2) of DPKBH have been determined in different aqueous-ethanol solvent mixtures (10, 20, 30 and 50 % V/V of ethanol) from potentiometric titrations at 25.0 ± 0.1° C. As the amount of ethanol increases from 10 to 30% the pK1 and pK2 values increased, but they decreased in 50% of the organic solvent. The results are correlated with the medium composition and its effects.

The Inhibitory Effect of Panax Ginseng Extract on Amyloid-like Fibril Formation of Trypsin in Aqueous Ethanol

2018 ◽  
Vol 25 (3) ◽  
pp. 253-259 ◽  
Author(s):  
Phanindra B. Kasi ◽  
Marta Kotorman ◽  
Attila Borics ◽  
Beata G. Hervay ◽  
Kinga Molnar ◽  
...  
Keyword(s):  
Panax Ginseng ◽  
Aqueous Ethanol ◽  
Inhibitory Effect ◽  
Fibril Formation ◽  
Ginseng Extract

Substituent Effects on the Basicity of ortho-, meta- and para-substituted N1,N1-Dimethyl-N2-phenylformamidines in Ethanol and in Water

1992 ◽  
Vol 57 (1) ◽  
pp. 113-118
Author(s):  
Ewa Daniela Raczyńska
Keyword(s):  
Quantitative Analysis ◽  
Aqueous Ethanol ◽  
Substituent Effects ◽  
Amino Group

The relative δpKa values of ortho-, meta-, and para-substituted N1,N1-dimethyl-N2-phenylformamidines obtained in 95.6% aqueous ethanol have been compared with those in water. The comparison shows only some differences in the ortho substituent effects. The meta and para substituent effects in ethanol are not very different from those in water. Quantitative analysis of the experimental δpKa values based on the Taft equation has led to separation of the total electromeric effects into the inductive and mesomeric effects. As compared to the amino group in anilines, the formamidine group is more sensitive to the transmission of the inductive than the mesomeric effects.

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