THE BEHAVIOUR OF SILVER-AND HALIDE-ION RESPONSIVE ELECTRODES IN MIXED SOLVENT-WATER MEDIA, AND THE INFLUENCE OF RESTORING CURRENTS ON ELECTRODE RESPONSE

Liquidus temperatures were measured for concentrated solutions of LiCl, CaCl2, ZnCl2, Zn(NO3)2, NaNO3 and Mg(NO3)2 in dimethyl sulphoxide. Crystalline solvates of salts with dimethyl sulphoxide which separated from these solutions were isolated and subjected to chemical and infrared spectroscopic analyses. It has been proved that in concentrated solutions in the mixed solvent water-dimethyl sulphoxide, the salts are preferentially solvated by dimethyl sulphoxide.

Download Full-text

Determination of The Ionization Constant of Local Anaesthetics in Organic Solvent-Water Media by The Spectrofluorimetric Method

Current Drug Therapy ◽

10.2174/1574885510999150505162857 ◽

2015 ◽

Vol 9 (4) ◽

pp. 232-238

Author(s):

S. Gunduz ◽

Eda Ediz ◽

Zeynep Altınordu

Keyword(s):

Organic Solvent ◽

Ionization Constant ◽

Local Anaesthetics ◽

Solvent Water ◽

Spectrofluorimetric Method ◽

Water Media

Download Full-text

The solubility of hydrophobic aromatic chemicals in organic solvent/water mixtures: Evaluation of four mixed solvent solubility estimation methods

Environmental Toxicology and Chemistry ◽

10.1002/etc.5620100704 ◽

1991 ◽

Vol 10 (7) ◽

pp. 881-889 ◽

Cited By ~ 13

Author(s):

Rebecca M. Dickhut ◽

David E. Armstrong ◽

Anders W. Andren

Keyword(s):

Organic Solvent ◽

Mixed Solvent ◽

Estimation Methods ◽

Solvent Water ◽

Solubility Estimation

Download Full-text

Chemoenzymatic Conversion of Biomass-Derived D-Xylose to Furfuryl Alcohol with Corn Stalk-Based Solid Acid Catalyst and Reductase Biocatalyst in a Deep Eutectic Solvent–Water System

Processes ◽

10.3390/pr10010113 ◽

2022 ◽

Vol 10 (1) ◽

pp. 113

Author(s):

Jianguang Liang ◽

Li Ji ◽

Jiarui He ◽

Shuxin Tang ◽

Yucai He

Keyword(s):

Furfuryl Alcohol ◽

Solid Acid ◽

Solid Acid Catalyst ◽

Deep Eutectic Solvent ◽

Water System ◽

Value Added ◽

Acid Catalyst ◽

Corn Stalk ◽

Solvent Water ◽

Water Media

In this work, the feasibility of chemoenzymatically transforming biomass-derived D-xylose to furfuryl alcohol was demonstrated in a tandem reaction with SO42−/SnO2-CS chemocatalyst and reductase biocatalyst in the deep eutectic solvent (DES)–water media. The high furfural yield (44.6%) was obtained by catalyzing biomass-derived D-xylose (75.0 g/L) in 20 min at 185 °C with SO42−/SnO2-CS (1.2 wt%) in DES ChCl:EG–water (5:95, v/v). Subsequently, recombinant E.coli CF cells harboring reductases transformed D-xylose-derived furfural (200.0 mM) to furfuryl alcohol in the yield of 35.7% (based on D-xylose) at 35 °C and pH 7.5 using HCOONa as cosubstrate in ChCl:EG–water. This chemoenzymatic cascade catalysis strategy could be employed for the sustainable production of value-added furan-based chemical from renewable bioresource.

Download Full-text

Dielectric Spectroscopy of Some Multihydroxy Compound Solutions in Water/Tetrahydrofuran Mixtures

Zeitschrift für Naturforschung A ◽

10.1515/zna-1998-3-408 ◽

1998 ◽

Vol 53 (3-4) ◽

pp. 145-149

Author(s):

F. F. Hanna ◽

A. L. G. Saad ◽

A. H. Shafik ◽

R. Biedenkap ◽

M. Stockhausen

Keyword(s):

Mixed Solvent ◽

Volume Fraction ◽

Ternary Systems ◽

Water Systems ◽

Aqueous Environment ◽

Minor Components ◽

Hydroxy Compound ◽

Solvent Water ◽

Structure And Dynamics ◽

Significant Difference

Abstract The dielectric spectra up to 72 GHz have been measured at 20 °C for solutions of glucose and sorbitol (max. 1 mol/1) in the mixed solvent water/tetrahydrofuran (THF) as a function of the THF content (max. volume fraction 0.4). There is no significant difference in the relaxation behaviour of corresponding glucose and sorbitol systems. The spectra of binary water/THF as well as hydroxy compound/water systems show that the respective minor components influence the structure and dynamics of water. The ternary systems hydroxy compound/water/THF, however, exhibit merely a superposition of those effects, thus there is no evidence for an interaction between the hydroxy compound and THF in aqueous environment.

Download Full-text