scholarly journals Temperature and concentration dependence of viscosity of Mg(NO3)2–H2O systems

1982 ◽  
Vol 60 (23) ◽  
pp. 2883-2888 ◽  
Author(s):  
S. Mahiuddin ◽  
K. Ismail
Keyword(s):  
Temperature Dependence ◽  
Concentration Dependence ◽  
Magnesium Nitrate ◽  
Concentration Dependences ◽  
Isothermal Equation ◽  
Nitrate Solutions

Densities and viscosities of aqueous magnesium nitrate solutions are measured as functions of temperature and composition. The temperature dependence of viscosity is described by the Vogel–Tammann–Fulcher (VTF) equation. By accounting quantitatively for the concentration dependences of all three parameters involved in the VTF equation an improved isothermal equation is obtained, it describes satisfactorily the concentration dependence of viscosity.

TEMPERATURE DEPENDENCE BEHAVIOR OF ELECTRICAL RESISTIVITY IN NOBLE METALS AT LOW TEMPERATURES

2014 ◽  
Vol 5 (3) ◽  
pp. 982-992 ◽  
Author(s):  
M AL-Jalali
Keyword(s):  
Experimental Data ◽  
Electrical Resistivity ◽  
Temperature Dependence ◽  
Concentration Dependence ◽  
Low Temperatures ◽  
Noble Metals ◽  
Phonon Scattering ◽  
Theoretical Models ◽  
Residual Resistivity ◽  
Electron Phonon Scattering

Resistivity temperature – dependence and residual resistivity concentration-dependence in pure noble metals(Cu, Ag, Au) have been studied at low temperatures. Dominations of electron – dislocation and impurity, electron-electron, and electron-phonon scattering were analyzed, contribution of these mechanisms to resistivity were discussed, taking into consideration existing theoretical models and available experimental data, where some new results and ideas were investigated.

A discussion on equations of phase equilibrium between two regular binary phases

1981 ◽  
Vol 46 (6) ◽  
pp. 1433-1438
Author(s):  
Jan Vřešťál
Keyword(s):  
Phase Equilibrium ◽  
Linear Function ◽  
Concentration Dependence ◽  
Absolute Temperature ◽  
Enthalpy Change ◽  
Independent Parameter ◽  
Free Enthalpy ◽  
Regular Solutions ◽  
Regular Model ◽  
Concentration Dependences

The conditions of the existence of extreme on the concentration dependences of absolute temperature (x are mole fractions) T = Tα(xkα) and T = Tβ(xkβ) denoting equilibrium between two binary regular solutions are generally developed under two assumptions: 1) Free enthalpy change of pure components k = i, j at transition from phase α to β is a linear function of temperature. 2) Concentration dependence of excess free enthalpy (identical with enthalpy) of solutions α and β, respectively, is described in regular model by one concentration and temperature independent parameter for each individual phase.

Triplet Energy Migration in Poly(4-methacryloylbenzophenone-co-methyl methacrylate) Films:  Temperature Dependence and Chromophore Concentration Dependence

1996 ◽  
Vol 29 (5) ◽  
pp. 1589-1594 ◽  
Author(s):  
Akira Tsuchida ◽  
Masahide Yamamoto ◽  
William R. Liebe ◽  
Richard D. Burkhart ◽  
Kyoji Tsubakiyama
Keyword(s):  
Methyl Methacrylate ◽  
Temperature Dependence ◽  
Concentration Dependence ◽  
Energy Migration ◽  
Triplet Energy ◽  
Chromophore Concentration

Structural and Magnetic Characteristics of (Eu1-xGax) Ba2Cu3O7-δ High-Tc Superconductors

1997 ◽  
Vol 11 (13) ◽  
pp. 593-597 ◽  
Author(s):  
Iuliu Pop ◽  
Radu Redac ◽  
Gheorghe Borodi ◽  
Virgil Ioncu
Keyword(s):  
Magnetic Susceptibility ◽  
Temperature Dependence ◽  
Concentration Dependence ◽  
Tetragonal Structure ◽  
Magnetic Characteristics ◽  
High Tc Superconductors ◽  
High Tc ◽  
Gallium Concentration ◽  
Paramagnetic Region ◽  
Diamagnetic Transition

The high-T c ( Eu 1-x Ga x) Ba 2 Cu 3 O 7-δ superconductors with x=0, 0.01, 0.02, 0.03, 0.06 and 0.09 were synthesized by a ceramic technique. The gallium concentration dependence of the lattice parameters was determined. A transition from orthorhombic toward tetragonal structure was relevated for the most gallium concentrated sample. The temperature dependence of the magnetic susceptibility pointed out the diamagnetic transition at 78 and 80 K. In the paramagnetic region the magnetic susceptibility exhibits anomal temperature dependence.

Study of magnesium nitrate behavior in sodium nitrate solutions at 25°C

2011 ◽  
Vol 84 (7) ◽  
pp. 1148-1151 ◽  
Author(s):  
O. M. Polishchuk ◽  
A. A. Fakeev ◽  
N. V. Potapova ◽  
A. G. Vendilo
Keyword(s):  
Sodium Nitrate ◽  
Magnesium Nitrate ◽  
Nitrate Solutions

Konzentrations-und Temperaturabhängigkeit der Sensibilisierten Verzögerten Fluoreszenz in Naphthalin/Anthracen-Mischkristallen / Sensitized Delayed Fluorescence in Naphthalene/Anthracene Mixed Crystals: Concentration and Temperature Dependence

1975 ◽  
Vol 30 (3) ◽  
pp. 277-286 ◽  
Author(s):  
H. Port ◽  
M. Bader ◽  
G. Weber ◽  
H. C. Wolf
Keyword(s):  
Energy Transfer ◽  
Temperature Dependence ◽  
Concentration Dependence ◽  
Energy Transport ◽  
Delayed Fluorescence ◽  
Mixed Crystals ◽  
Temperature Range ◽  
Host Molecules ◽  
Hopping Model ◽  
Triplet Excitons

The delayed fluorescence of naphthalene crystals doped with anthracene has been investigated for concentrations between 7 × 10-9 and 10-5mol/mol in the temperature range 4.2 -300 °K. The concentration dependence of both the quantum ratio of host and guest emission and of the lifetime shows the effectivity of energy transfer by triplet excitons. It can be described quantitatively within the statistical hopping model, which includes the probability for an exciton to visit the same host molecules repetitively before becoming trapped. This incoherent energy transport becomes faster as the temperature is lowered. The exciton hopping time decreases monotonically from tʜ = 2 × 10-10 sec at 300 °K to tʜ = 8 × 10-11 sec at 130 °K. Below 100 °K the delayed fluorescence is governed by competing trapping effects.

Concentration dependence and temperature dependence of hydrogen tunneling in Nb(OH)x

1986 ◽  
Vol 56 (2) ◽  
pp. 159-162 ◽  
Author(s):  
A. Magerl ◽  
A. J. Dianoux ◽  
H. Wipf ◽  
K. Neumaier ◽  
I. S. Anderson
Keyword(s):  
Temperature Dependence ◽  
Concentration Dependence ◽  
Hydrogen Tunneling

Water vapor concentration dependence and temperature dependence of Li mass loss from Li2TiO3 with excess Li and Li4SiO4

2015 ◽  
Vol 98-99 ◽  
pp. 1808-1811 ◽  
Author(s):  
Motoki Shimozori ◽  
Kazunari Katayama ◽  
Tsuyoshi Hoshino ◽  
Hiroki Ushida ◽  
Ryotaro Yamamoto ◽  
...  
Keyword(s):  
Water Vapor ◽  
Mass Loss ◽  
Temperature Dependence ◽  
Concentration Dependence ◽  
Vapor Concentration ◽  
Water Vapor Concentration
Sign in / Sign up

Export Citation Format

Share Document