Power-Law Behavior in the Frequency dependence of the Electrical Conductivity of Poly(L-Glutamic Acid) Aqueous Solutions

1992 ◽  
Vol 96 (1) ◽  
pp. 101-103 ◽  
Author(s):  
F. Bordi ◽  
C. Cametti ◽  
G. Paradossi
Keyword(s):  
Electrical Conductivity ◽  
Aqueous Solutions ◽  
Glutamic Acid ◽  
Frequency Dependence ◽  
Power Law

Viscosity, electrical conductivity and density of the system ammonium nitrate-dimethyl sulphoxide

1984 ◽  
Vol 49 (5) ◽  
pp. 1109-1115
Author(s):  
Jindřich Novák ◽  
Zdeněk Kodejš ◽  
Ivo Sláma
Keyword(s):  
Electrical Conductivity ◽  
Aqueous Solutions ◽  
Ammonium Nitrate ◽  
Transport Properties ◽  
Calcium Nitrate ◽  
Dimethyl Sulphoxide ◽  
Present System ◽  
Empirical Equations ◽  
Concentrated Solutions ◽  
Nitrate Solutions

The density, viscosity, and electrical conductivity of highly concentrated solutions of ammonium nitrate in dimethyl sulphoxide have been determined over the temperature range 10-60 °C and the concentration range 7-50 mol% of the salt. The variations in the quantities as a function of temperature and concentration have been correlated by empirical equations. A comparison is made between the transport properties for the present system, aqueous solutions of ammonium nitrate, and calcium nitrate solutions in dimethyl sulphoxide.

scholarly journals Impact of external physical effects on water and aqueous solutions: the problem of “memory”

2019 ◽  
Vol 59 (7) ◽  
pp. 1-16
Author(s):  
Ksenia A. Nurislamova ◽  
◽  
Alena S. Franz ◽  
Vyacheslav F. Markov ◽  
Larisa N. Maskaeva ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Electrical Conductivity ◽  
Aqueous Solutions ◽  
Solid Phase ◽  
Cluster Structure ◽  
Lead Salt ◽  
Physical Factors ◽  
Scientific Publications ◽  
Physical Effects ◽  
The Impact

A brief analysis of scientific publications on the changes in the physicochemical properties of water and aqueous solutions under the influence of temperature, magnetic and electric fields, laser and microwave radiation, ultrasound, and mechanical mixing was performed. A number of researchers have shown the influence of such effects on changes in pH and redox potential, electrical conductivity, surface tension and viscosity of an aqueous solution. The question of influence of external physical effects on water and aqueous solutions remains controversial. Some scientists suggest that water has a cluster structure, which is influenced by physical effects. An important aspect of the problem is the impact on the subsequent behavior and the final result of a chemical process involving previously treated aqueous solutions. Using water solutions of lead and thiourea as an example, the effect of their temperature prehistory in the range of 275-369 K on the kinetics of precipitation of the solid phase of lead sulfide and their microstructure is demonstrated. A threefold change in the composition of supersaturated CdxPb1–xS solid solutions precipitated from solutions containing a lead salt with different temperature prehistory was established. It is shown that the “memory” on the preliminary temperature effect is maintained for at least a day. The influence of electromagnetic treatment of water and aqueous solutions on the content of dissolved oxygen, pH and electrical conductivity is analyzed. Some scientists explain these results by the influence of the field on the structure of hydrogen bonds, others by a change in the cluster structure of water, as well as by the presence of ferromagnetic particles in water. The review presents the current state of the problem of the “memory” effect and the related influence of the prehistory of the impact of physical factors. The review suggested that the “memory” of an aqueous solution is the preservation for a certain time of the changes in its structure and properties that have arisen as a result of the effect. The basic ideas about the mechanisms of influence of the prehistory of physical effects on aqueous solutions are given.

scholarly journals HYDROLYSIS AND ELECTRICAL CONDUCTIVITY OF METHYLAMONIUM SULFAMATE AQUEOUS SOLUTIONS

2020 ◽  
Vol 25 (1(73)) ◽  
pp. 76-86
Author(s):  
R. E. Khoma ◽  
A. A.-A. Ennan ◽  
S. V. Vodzinskii ◽  
A. N. Chebotaryov ◽  
L. T. Osadchiy
Keyword(s):  
Electrical Conductivity ◽  
Aqueous Solutions

The physical properties of anomalous water

1971 ◽  
Vol 24 (4) ◽  
pp. 675 ◽  
Author(s):  
WW Mansfield
Keyword(s):  
Electrical Conductivity ◽  
Surface Tension ◽  
Melting Point ◽  
Aqueous Solutions ◽  
Physical Properties ◽  
Vapour Pressure ◽  
Column Length ◽  
Anomalous Water

The properties of anomalous aqueous condensates, prepared in the manner described by Deryagin,1 vary with aqueous vapour pressure. The changes of column length and of melting point are similar to those of ordinary aqueous solutions. There is no sound evidence that the condensate exhibits abnormal viscosity, density, electrical conductivity, or surface tension.

scholarly journals Technical note: A two-sided affine power scaling relationship to represent the concentration–discharge relationship

2020 ◽  
Vol 24 (4) ◽  
pp. 1823-1830 ◽  
Author(s):  
José Manuel Tunqui Neira ◽  
Vazken Andréassian ◽  
Gaëlle Tallec ◽  
Jean-Marie Mouchel
Keyword(s):  
Electrical Conductivity ◽  
Time Series ◽  
Power Law ◽  
High Frequency ◽  
Technical Note ◽  
Mathematical Representation ◽  
Power Scaling ◽  
Calibration And Validation ◽  
Numerical Criterion ◽  
Scaling Relationship

Abstract. This technical note deals with the mathematical representation of concentration–discharge relationships. We propose a two-sided affine power scaling relationship (2S-APS) as an alternative to the classic one-sided power scaling relationship (commonly known as “power law”). We also discuss the identification of the parameters of the proposed relationship, using an appropriate numerical criterion. The application of 2S-APS to the high-frequency chemical time series of the Orgeval-ORACLE observatory is presented here (in calibration and validation mode): it yields better results for several solutes and for electrical conductivity in comparison with the power law relationship.

Evaluation of thermodynamic properties and correlation of L-glutamic acid solubility in some aqueous chloride solutions from 298.15 to 323.15 K

2019 ◽  
Vol 97 (8) ◽  
pp. 615-620
Author(s):  
Mustafa Jaipallah Abualreish ◽  
Adel Noubigh
Keyword(s):  
Thermodynamic Properties ◽  
Aqueous Solutions ◽  
Glutamic Acid ◽  
Pure Water ◽  
Gravimetric Method ◽  
Chloride Salt ◽  
Salting Out ◽  
Chloride Solutions ◽  
Aqueous Chloride ◽  
The Impact

This paper investigates the solubility–temperature dependence data for L-glutamic acid (Glu) in water and in some chloride salt (NaCl and KCl) aqueous solutions. Solubility data were determined from 293.15 to 318.15 K under atmospheric pressure by using a thermostatted reactor and the gravimetric method. After the investigation of the impact of inorganic salts on the solvency of Glu, it was found that the salting-out effect decreases in the following order: sodium chloride > potassium chloride. Results demonstrated that the solubility, in unadulterated water and in aqueous chloride solutions, increased with a rising temperature. The experimental data were well correlated by the semi-empirical equation. Using the measured solubilities, the standard molar thermodynamic properties of transfer of Glu (ΔtrG°, ΔtrH°, and ΔtrS°) from pure water to aqueous solutions of the chloride salts were estimated.

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