scholarly journals Finite Temperature Effects on Supernova Explosion Energy and Hyperon Composition

2004 ◽  
Vol 156 ◽  
pp. 152-153
Author(s):  
Chikako Ishizuka ◽  
Akira Ohnishi ◽  
Kousuke Sumiyoshi ◽  
Shoichi Yamada
Keyword(s):  
Finite Temperature ◽  
Temperature Effects ◽  
Supernova Explosion ◽  
Explosion Energy

scholarly journals Finite-temperature effects on interacting bosonic one-dimensional systems in disordered lattices

2016 ◽  
Vol 93 (3) ◽  
Author(s):  
Lorenzo Gori ◽  
Thomas Barthel ◽  
Avinash Kumar ◽  
Eleonora Lucioni ◽  
Luca Tanzi ◽  
...  
Keyword(s):  
Finite Temperature ◽  
Temperature Effects ◽  
One Dimensional

scholarly journals Dependence of the acceleration of the outer edge of a stellar envelope on supernova explosion energy

2009 ◽  
Vol 35 (6) ◽  
pp. 388-395
Author(s):  
D. K. Nadyozhin ◽  
A. V. Karamyan ◽  
E. K. Grasberg
Keyword(s):  
Supernova Explosion ◽  
Outer Edge ◽  
Explosion Energy ◽  
Stellar Envelope

scholarly journals Complete positivity, finite-temperature effects, and additivity of noise for time-local qubit dynamics

2016 ◽  
Vol 93 (5) ◽  
Author(s):  
Juho Lankinen ◽  
Henri Lyyra ◽  
Boris Sokolov ◽  
Jose Teittinen ◽  
Babak Ziaei ◽  
...  
Keyword(s):  
Finite Temperature ◽  
Temperature Effects ◽  
Complete Positivity

Finite-temperature effects in enzymatic reactions — Insights from QM/MM free-energy simulations

2009 ◽  
Vol 87 (10) ◽  
pp. 1322-1337 ◽  
Author(s):  
Hans Martin Senn ◽  
Johannes Kästner ◽  
Jürgen Breidung ◽  
Walter Thiel
Keyword(s):  
Free Energy ◽  
Finite Temperature ◽  
Temperature Effects ◽  
Density Functional ◽  
Umbrella Sampling ◽  
Chorismate Mutase ◽  
Enzymatic Reactions ◽  
Energy Data ◽  
Energy Simulations ◽  
Entropic Contribution

We report potential-energy and free-energy data for three enzymatic reactions: carbon–halogen bond formation in fluorinase, hydrogen abstraction from camphor in cytochrome P450cam, and chorismate-to-prephenate Claisen rearrangement in chorismate mutase. The results were obtained by combined quantum mechanics/molecular mechanics (QM/MM) optimizations and two types of QM/MM free-energy simulations (free-energy perturbation and umbrella sampling) using semi-empirical or density-functional QM methods. Based on these results and our previously published free-energy data on electrophilic substitution in para-hydroxybenzoate hydroxylase, we discuss the importance of finite-temperature effects in the chemical step of enzyme reactions. We find that the entropic contribution to the activation barrier is generally rather small, usually of the order of 5 kJ mol–1 or less, consistent with the notion that enzymes bind and pre-organize the reactants in the active site. A somewhat larger entropic contribution is encountered in the case of chorismate mutase where the pericyclic transition state is intrinsically more rigid than the chorismate reactant (also in the enzyme). The present results suggest that barriers from QM/MM geometry optimization may often be close to free-energy barriers for the chemical step in enzymatic reactions.

scholarly journals Magnetorotational supernovae with different equations of state

2011 ◽  
Vol 7 (S279) ◽  
pp. 357-358
Author(s):  
Sergey G. Moiseenko ◽  
Gennady S. Bisnovatyi-Kogan
Keyword(s):  
Magnetic Field ◽  
Shock Wave ◽  
Angular Momentum ◽  
Differential Rotation ◽  
Equations Of State ◽  
Supernova Explosion ◽  
Explosion Energy ◽  
Iron Core ◽  
Wave Forms ◽  
The Magnetic Field

AbstractWe present results of the simulation of a magneto-rotational supernova explosion. We show that, due to the differential rotation of the collapsing iron core, the magnetic field increases with time. The magnetic field transfers angular momentum and a MHD shock wave forms. This shock wave produces the supernova explosion. The explosion energy computed in our simulations is 0.5-2.5 ċ 1051erg. We used two different equations of state for the simulations. The results are rather similar.

Sign in / Sign up

Export Citation Format

Share Document