Thermodynamics of aqueous mixtures of electrolytes and nonelectrolytes. VII. Enthalpies of transfer of perchloric and hydrochloric acids from pure water to aqueous ethylene glycol and aqueous acetic acid

1969 ◽  
Vol 73 (4) ◽  
pp. 928-930 ◽  
Author(s):  
John H. Stern ◽  
J. M. Nobilione
Keyword(s):  
Acetic Acid ◽  
Ethylene Glycol ◽  
Pure Water ◽  
Aqueous Acetic Acid ◽  
Aqueous Mixtures ◽  
Enthalpies Of Transfer ◽  
Mixtures Of Electrolytes ◽  
Aqueous Ethylene Glycol

Thermodynamics of aqueous mixtures of electrolytes and nonelectrolytes. V. Enthalpies of transfer in the limiting region at 25.deg.

1968 ◽  
Vol 72 (8) ◽  
pp. 3053-3054
Author(s):  
J. H. Stern ◽  
J. Lazartic ◽  
D. Fost
Keyword(s):  
Aqueous Mixtures ◽  
Enthalpies Of Transfer ◽  
Mixtures Of Electrolytes

Electrochemical behaviour of the Zn(II)–Zn(Hg) system in aqueous ethylene glycol solutions

1986 ◽  
Vol 64 (5) ◽  
pp. 891-896 ◽  
Author(s):  
R. M. Rodríguez ◽  
E. Brillas ◽  
J. A. Garrido ◽  
J. Doménech
Keyword(s):  
Cyclic Voltammetry ◽  
Ethylene Glycol ◽  
Electrochemical Behaviour ◽  
Pure Water ◽  
Solvent Composition ◽  
Transfer Coefficients ◽  
Half Wave ◽  
Walden Products ◽  
Standard Rate ◽  
Aqueous Ethylene Glycol

The electrochemical behaviour of the Zn(II)–Zn(Hg) system in aqueous ethylene glycol (EG) solutions containing 5.0 × 10−2 M LiClO4 has been studied by polarography and cyclic voltammetry. The reversible half-wave potentials, the diffusion coefficients and the Walden products for Zn(II) have been polarographically determined. The standard free energies of transfer of 1 mol of Zn(II) ions from water to EG–water mixtures, [Formula: see text], obtained from the reversible half-wave potentials vs. the ferrocene electrode scale, are always negative, indicating a greater stability of Zn(II) in EG–water mixtures than in pure water. The splitting of the [Formula: see text] values into electrostatic and chemical contributions shows that the mixtures are more basic than water. The analysis of the variation of the Walden product with solvent composition indicates an enhancement of the solvent structure in the water-rich region. The diffusion coefficient for Zn in mercury, the transfer coefficients for Zn(II) electroreduction, and the apparent standard rate constants of the Zn(II)–Zn(Hg) system have been determined by cyclic voltammetry. The change in the kinetics with solvent composition is discussed in terms of existing models.

Novel Compound from Flowers of Moringa oleifera Active Against Multi- Drug Resistant Gram-negative Bacilli

2020 ◽  
Vol 20 (1) ◽  
pp. 69-75
Author(s):  
Santi M. Mandal ◽  
Subhanil Chakraborty ◽  
Santanu Sahoo ◽  
Smritikona Pyne ◽  
Samaresh Ghosh ◽  
...  
Keyword(s):  
Acetic Acid ◽  
Moringa Oleifera ◽  
Aqueous Acetic Acid ◽  
Phytochemical Analysis ◽  
Hydroxyl Groups ◽  
Drug Resistant ◽  
Gram Negative ◽  
Isolated Compound ◽  
Conventional Antibiotics

Background: The need for suitable antibacterial agents effective against Multi-drug resistant Gram-negative bacteria is acknowledged globally. The present study was designed to evaluate the possible antibacterial potential of an extracted compound from edible flowers of Moringa oleifera. Methods: Five different solvents were used for preparing dried flower extracts. The most effective extract was subjected to fractionation and further isolation of the active compound with the highest antibacterial effect was obtained using TLC, Column Chromatography and reverse phase- HPLC. Approaches were made for characterization of the isolated compound using FTIR, NMR and Mass spectrometry. Antibacterial activity was evaluated according to the CLSI guidelines. Results: One fraction of aqueous acetic acid extract of M. oleifera flower was found highly effective and more potent than conventional antibiotics of different classes against Multi-drug resistant Gram-negative bacilli (MDR-GNB) when compared. The phytochemical analysis of the isolated compound revealed the presence of hydrogen-bonded amine and hydroxyl groups attributable to unsaturated amides. Conclusion: The present study provided data indicating a potential for use of the flowers extract of M. oleifera in the fight against infections caused by lethal MDR-GNB. Recommendations: Aqueous acetic acid flower extract of M. oleifera is effective, in-vitro, against Gram-negative bacilli. This finding may open a scope in pharmaceutics for the development of new classes of antibiotics.

VOLUMETRIC PROPERTIES AND VISCOSITIES OF ACETIC ACID WITH ETHYLENE GLYCOL AND DIETHYLENE GLYCOL AT TEMPERATURES FROM 303.15 TO 323.15 K

2013 ◽  
Vol 201 (4) ◽  
pp. 528-544 ◽  
Author(s):  
Da-Hai Ren ◽  
Sheng Fang ◽  
Xue-Jiao Xu ◽  
Bing Ding
Keyword(s):  
Acetic Acid ◽  
Ethylene Glycol ◽  
Diethylene Glycol ◽  
Volumetric Properties

Effective enzymatic saccharification of dilute NaOH extraction of chestnut shell pretreated by acidified aqueous ethylene glycol media

2016 ◽  
Vol 81 ◽  
pp. 129-138 ◽  
Author(s):  
Yu-Cai He ◽  
Feng Liu ◽  
Jun-Hua Di ◽  
Yun Ding ◽  
Zheng-Zhong Zhu ◽  
...  
Keyword(s):  
Ethylene Glycol ◽  
Enzymatic Saccharification ◽  
Chestnut Shell ◽  
Aqueous Ethylene Glycol

Measurement of the thermodynamic properties for the reactive system ethylene glycol–acetic acid

2007 ◽  
Vol 258 (2) ◽  
pp. 115-124 ◽  
Author(s):  
Bastian Schmid ◽  
Michael Döker ◽  
Jürgen Gmehling
Keyword(s):  
Acetic Acid ◽  
Thermodynamic Properties ◽  
Ethylene Glycol ◽  
Reactive System
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