Effects of pressure and temperature on the dielectric constant of GaS, GaSe, and InSe:  Role of the electronic contribution

SummaryWe have investigated the role of pH in the destabilization of milk and sodium caseinate solutions by ethanol. Ethanol shifted the pH of minimum stability of both caseinate and milk to higher values. A linear relation between this pH and the reciprocal dielectric constant of the mixture was observed. The addition of calcium to these alcoholic mixtures also increased the pH of minimum stability. The results are discussed in terms of the alcohol-induced shifts in the pK values of important constituent amino acids and of the effect of alcohol on soluble Ca levels.

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Concerning the role of the reaction field in the proton shielding of molecules in solution

Canadian Journal of Chemistry ◽

10.1139/v67-184 ◽

1967 ◽

Vol 45 (10) ◽

pp. 1093-1096 ◽

Cited By ~ 5

Author(s):

G. Kotowycz ◽

T. Schaefer

Keyword(s):

Dielectric Constant ◽

Chemical Shift ◽

Solute Molecule ◽

Proton Chemical Shift ◽

Square Root ◽

Reaction Field ◽

Strong Curvature

It is shown that the strong curvature in some plots of proton chemical shift σ versus the Onsager reaction field E can be removed by plotting the shifts of the solute molecule versus the square root of the dielectric constant of the medium. The resulting values of k in the equation σ = −kE cos θ are fairly consistent and reasonable in magnitude.

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Symmetric and asymmetric cleavage of the lighter boron hydrides and of metal salts – the role of the dielectric constant

Journal of Organometallic Chemistry ◽

10.1016/s0022-328x(00)00591-x ◽

2000 ◽

Vol 614-615 ◽

pp. 5-9 ◽

Cited By ~ 10

Author(s):

Robert W. Parry

Keyword(s):

Dielectric Constant ◽

Metal Salts ◽

Boron Hydrides

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The Role of Niobium in (Ca, Si, Ce, Nb)-Doped TiO2 Varistors

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.280-283.297 ◽

2007 ◽

Vol 280-283 ◽

pp. 297-300 ◽

Cited By ~ 4

Author(s):

Shao Hua Luo ◽

Zi Long Tang ◽

Hong Yun Li ◽

Zhong Tai Zhang ◽

Xi Zhou Xiong

Keyword(s):

Dielectric Constant ◽

Electrical Properties ◽

Room Temperature ◽

Structural Characteristics ◽

Nonlinear Coefficient ◽

The Other ◽

Optimal Composition ◽

Low Loss ◽

Nb Addition

The present work attempted to investigate the effect of Nb addition on the electrical properties of the (Ca,Si,Ce,Nb)-doped TiO2 ceramics. The content of added niobium is in the range 0.1-1.0mol %, while that of the other additives keeps constant. The results showed that an optimal composition doped with 0.8mol% Nb2O5, followed by sintering at 1350°C, was obtained with low V1 mA of 7.22V, high nonlinear coefficient of 5.76, ultrahigh dielectric constant (er = 86000) as well as relatively low loss (tgd = 0.52) in room temperature at 1 kHz. SEM studies show that change of niobium had significant influence on grain growth and micro structural characteristics of the sintered samples.

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