Experimental and theoretical study of free radicals of L-(+)-ascorbic acid in PMMA matrix, generated under high pressure

2002 ◽  
Vol 22 (1) ◽  
pp. 1-10
Author(s):  
A. Búcsi ◽  
O. L. Malkina ◽  
V. G. Malkin ◽  
P. Mach
Keyword(s):  
High Pressure ◽  
Ascorbic Acid ◽  
Free Radicals ◽  
Theoretical Study ◽  
Pmma Matrix

57Fe Mössbauer isomer shift of pure iron and iron oxides at high pressure—An experimental and theoretical study

2021 ◽  
Vol 154 (21) ◽  
pp. 214104
Author(s):  
Jacques K. Desmarais ◽  
Wenli Bi ◽  
Jiyong Zhao ◽  
Michael H. Hu ◽  
Esen Alp ◽  
...  
Keyword(s):  
High Pressure ◽  
Isomer Shift ◽  
Iron Oxides ◽  
Pure Iron ◽  
Theoretical Study ◽  
57Fe Mössbauer ◽  
Mössbauer Isomer Shift

Theoretical study of Raman modes in high-pressure phases of Si, Ge, and Sn

1993 ◽  
Vol 48 (6) ◽  
pp. 3646-3653 ◽  
Author(s):  
Steven P. Lewis ◽  
Marvin L. Cohen
Keyword(s):  
High Pressure ◽  
Theoretical Study ◽  
Raman Modes

Theoretical study of ground state and high-pressure phase of platinum carbide

2008 ◽  
Vol 69 (11) ◽  
pp. 2907-2910 ◽  
Author(s):  
M. Rabah ◽  
D. Rached ◽  
M. Ameri ◽  
R. Khenata ◽  
A. Zenati ◽  
...  
Keyword(s):  
High Pressure ◽  
Ground State ◽  
Theoretical Study ◽  
High Pressure Phase ◽  
Pressure Phase

Theoretical Study on the Mechanism of Direct Transformation from Graphite to Diamond at Ultra High-Pressure and High-Temperature

2014 ◽  
Vol 151 (1) ◽  
pp. 99-107 ◽  
Author(s):  
Bin Xu ◽  
Bin Tian ◽  
Mei-zhe Lv ◽  
Xiao-hong Fan ◽  
Xiao-fei Guo ◽  
...  
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Theoretical Study ◽  
Direct Transformation ◽  
Ultra High Pressure

Theoretical study on UH4, UH8 and UH10 at high pressure

2019 ◽  
Vol 383 (8) ◽  
pp. 774-780
Author(s):  
Dong Wang ◽  
Han Zhang ◽  
Hai-Liang Chen ◽  
Jie Wu ◽  
Qing-Jun Zang ◽  
...  
Keyword(s):  
High Pressure ◽  
Theoretical Study

scholarly journals Free Radicals in the Auto-Oxidation of Ascorbic Acid.

1964 ◽  
Vol 18 ◽  
pp. 562-562 ◽  
Author(s):  
Carl Lagercrantz ◽  
Carl Axel Wachtmeister ◽  
J. A. Elvidge ◽  
J. S. Burton ◽  
Roger Stevens
Keyword(s):  
Ascorbic Acid ◽  
Free Radicals

scholarly journals First-Principles Calculations of High-Pressure Physical Properties of Ti0.5Ta0.5 Alloy

Symmetry ◽  
2020 ◽  
Vol 12 (5) ◽  
pp. 796
Author(s):  
Fang Yu ◽  
Yu Liu
Keyword(s):  
High Pressure ◽  
Physical Properties ◽  
First Principles ◽  
Theoretical Study ◽  
Applied Pressure ◽  
Lattice Parameter ◽  
Physical Parameters ◽  
First Principles Calculations ◽  
Analysis Method ◽  
Metallic Bond

In this paper, an in-depth theoretical study on some physical properties of Ti0.5Ta0.5 alloy with systematic symmetry under high pressure is conducted via first-principles calculations, and relevant physical parameters are calculated. The results demonstrate that the calculated parameters, including lattice parameter, elastic constants, and elastic moduli, fit well with available theoretical and experimental data when the Ti0.5Ta0.5 alloy is under T = 0 and P = 0 , indicating that the theoretical analysis method can effectively predict the physical properties of the Ti0.5Ta0.5 alloy. The microstructure and macroscopic physical properties of the alloy cannot be destroyed as the applied pressure ranges from 0 to 50GPa, but the phase transition of crystal structure may occur in the Ti0.5Ta0.5 alloy if the applied pressure continues to increase according to the TDOS curves and charge density diagram. The value of Young’s and shear modulus is maximized at P = 25   GPa . The anisotropy factors A ( 100 ) [ 001 ] and A ( 110 ) [ 001 ] are equal to 1, suggesting the Ti0.5Ta0.5 alloy is an isotropic material at 28 GPa, and the metallic bond is strengthened under high pressure. The present results provide helpful insights into the physical properties of Ti0.5Ta0.5 alloy.

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