Parabolic Model of Bimolecular Homolytic Reaction

2005 ◽  
pp. 421-478
Keyword(s):  
Parabolic Model ◽  
Homolytic Reaction

Relationship between plasma osmolality and plasma vasopressin in human subjects

1980 ◽  
Vol 238 (4) ◽  
pp. E313-E317 ◽  
Author(s):  
M. Hammer ◽  
J. Ladefoged ◽  
K. Olgaard
Keyword(s):  
Linear Models ◽  
Human Subjects ◽  
Plasma Osmolality ◽  
Metabolic Clearance ◽  
Parabolic Model ◽  
Pronounced Increase ◽  
Plasma Vasopressin ◽  
Log Linear ◽  
The Relationship ◽  
Best Fit

The relationship between plasma osmolality (pOsm) and plasma vasopressin (pAVP) was studied in 13 human subjects during dehydration. The fit of linear, log-linear, parabolic, and exponential models was tested. For all of the data, the nonlinear models had the best fit. However, when individual differences in either gain or threshold were allowed for, the linear models were better than log-linear models. Finally, analyses were made with individual data points. Linear models had the best fit in half of the subjects, whereas for the others the parabolic model gave the best fit. For those subjects investigated in the low range of the osmoregulatory curve, a linear relationship was found, whereas, for those having the most pronounced increase in pOsm, the most significant improvement was found with the parabolic model. This finding indicates that the relationship is not stable during dehydration in the whole range and that hypovolemia probably can influence the secretion rate and/or metabolic clearance rate and thereby the relationship.

Additional Engine Testing of an Advanced Alloy for Microturbine Primary Surface Recuperators

2006 ◽  
Author(s):  
Wendy J. Matthews
Keyword(s):  
Operating Temperature ◽  
Engine Test ◽  
Test Results ◽  
Preliminary Estimate ◽  
Parabolic Model ◽  
Scale Growth ◽  
Temperature Oxide ◽  
Model Engine ◽  
Engine Testing ◽  
Elemental Depletion

HAYNES ® alloy HR-120 ® is being evaluated as a replacement for type 347 stainless steel for use in Microturbine Primary Surface Recuperators. The material has been characterized after being subjected to both steady-state and cyclic engine exposure in a Capstone C60 MicroTurbine™ operating at 100°F above the normal operating temperature. Oxide scale growth and elemental depletion has been analyzed and documented after 1,800 and 2,500 hours of exposure. A preliminary estimate of the remaining usable oxidation life has been made using a simplified parabolic model. Engine test results indicate that HR-120 has improved oxidation resistance and elemental stability.

Anderson Parabolic Model for a Quasi-Stationary Medium

2007 ◽  
Vol 129 (1) ◽  
pp. 151-169
Author(s):  
C. Boldrighini ◽  
S. Molchanov ◽  
A. Pellegrinotti
Keyword(s):  
Parabolic Model ◽  
Stationary Medium

scholarly journals X-ray Spectral Evolution of High Energy Peaked Blazars

Galaxies ◽  
2020 ◽  
Vol 8 (3) ◽  
pp. 62
Author(s):  
Haritma Gaur
Keyword(s):  
High Energy ◽  
Energy Interval ◽  
Spectral Studies ◽  
Parabolic Model ◽  
Spectral Evolution ◽  
Spectral Variability ◽  
Spectral Parameters ◽  
X Ray ◽  
Wide Energy ◽  
Energy Dependent

The synchrotron hump of the high energy peaked blazars generally lies in the 0.1–10 keV range and such sources show extreme flux and spectral variability in X-ray bands. Various spectral studies showed that the X-ray spectra of high energy peaked blazars are curved and better described by the log-parabolic model. The curvature is attributed to the energy dependent statistical acceleration mechanism. In this work, we review the X-ray spectral studies of high energy peaked blazars. It is found that the log-parabolic model well describes the spectra in a wide energy interval around the peak. The log-parabolic model provides the possibility of investigating the correlation between the spectral parameters derived from it. Therefore, we compiled the studies of correlations between the various parameters derived from the log-parabolic model and their implications to describe the variability mechanism of blazars.

Déplacements homolytiques intramoléculaires. 4. Thermolyse du perpentène-4 oate de tert-butyle dans les acides et leurs derivés: préparation de γ-butyrolactones substituées en 4 par un groupe comportant une fonction ester, acide ou nitrile

1985 ◽  
Vol 63 (9) ◽  
pp. 2522-2528 ◽  
Author(s):  
A. Kharrat ◽  
C. Gardrat ◽  
B. Maillard
Keyword(s):  
Carboxylic Acids ◽  
Methyl Esters ◽  
Homolytic Reaction ◽  
Alkanoic Acids

The thermolysis of tert-butylperpent-4-enoate in various solvents ZH (carboxylic acids, anhydrides, methyl esters, nitriles) led to γ-butyrolactones 4-substituted by the group ZCH2 with good yields. The acidic treatment of the lactones 4 and 6 derived from non-functionalized alkanoic acids and methyl esters gave respectively the isomerized lactones 5 and 7, increasing the synthetic interest of the studied homolytic reaction.

Sign in / Sign up

Export Citation Format

Share Document