scholarly journals Detailed study of the direct numerical observation of the Kramers turnover in the LiNC⇌LiCN isomerization rate

2012 ◽  
Vol 137 (20) ◽  
pp. 204301 ◽  
Author(s):  
P. L. García Müller ◽  
Rigoberto Hernandez ◽  
R. M. Benito ◽  
F. Borondo
Keyword(s):  
Isomerization Rate

Peptidyl-prolyl cis-trans isomerase does not affect the Pro-43 cis-trans isomerization rate in folded calbindin D9k

FEBS Letters ◽  
1990 ◽  
Vol 263 (1) ◽  
pp. 27-30 ◽  
Author(s):  
Johan Kördel ◽  
Torbjörn Drakenberg ◽  
Sture Forsén ◽  
Eva Thulin
Keyword(s):  
Isomerization Rate ◽  
Calbindin D9k ◽  
Trans Isomerization

Study on Thermal Isomerization of Isopimaric Acid

2013 ◽  
Vol 634-638 ◽  
pp. 440-444 ◽  
Author(s):  
Yu Xiang Chen ◽  
Zhen Dong Zhao ◽  
Yan Gu ◽  
Yan Ju Lu
Keyword(s):  
Thermal Treatment ◽  
Treatment Time ◽  
Decomposition Reaction ◽  
Thermal Isomerization ◽  
Treatment Temperature ◽  
Isomerization Reaction ◽  
Isopimaric Acid ◽  
Isomerization Rate ◽  
Isomerization Mechanism ◽  
Sandaracopimaric Acid

The thermal isomerization reaction of isopimaric acid was studied by a treatment at different temperature of 250 °C, 260 °C and 270 °C for 1-5 h under the protection of nitrogen. The isomerization mechanism of isopimaric acid was illuminated. Isopimaric acid was remarkably isomerized to 8, 15-isopimaric acid and sandaracopimaric acid, the higher thermal treatment temperature combined with longer thermal treatment time, the faster isomerization rate of isopimaric acid was observed. It was found that the isomerization rate of isopimaric acid towards 8, 15-isopimaric acid was faster than to sandaracopimaric acid. The decomposition reaction of pimaric-type acids occurred slightly in conditions of 250 ~ 270 °C.

Isomerization of butene over a chromia–alumina catalyst

1969 ◽  
Vol 47 (2) ◽  
pp. 323-329 ◽  
Author(s):  
H. C. Chen ◽  
R. R. Hudgins ◽  
P. L. Silveston
Keyword(s):  
Partial Pressure ◽  
Total Pressure ◽  
Active Sites ◽  
Catalyst Deactivation ◽  
Surface Reactions ◽  
Alumina Catalyst ◽  
Isomerization Rate ◽  
Partial Pressures ◽  
Cis And Trans ◽  
Micro Reactor

Isomerization runs were performed in a micro-reactor at 325 °C over a range of butene partial pressure of 84 to 763 mm Hg and at a total pressure of approximately 1 atm. The isomerization rate of 1-butene passed through a maximum with increasing 1-butene partial pressure; the isomerization rate of cis- and trans-2-butene increased asymptotically with increasing cis- and trans-2-butene partial pressures respectively. Stereoselectivity was observed in the isomerization of each butene, and was found to be independent of pressure. Catalyst deactivation resulted in loss in stereoselectivity. Results suggest that surface reactions control isomerization and proceed simultaneously on different active sites.

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