scholarly journals Origin of the low thermal isomerization rate of rhodopsin chromophore

2015 ◽  
Vol 5 (1) ◽  
Author(s):  
Masataka Yanagawa ◽  
Keiichi Kojima ◽  
Takahiro Yamashita ◽  
Yasushi Imamoto ◽  
Take Matsuyama ◽  
...  
Keyword(s):  
Thermal Isomerization ◽  
Isomerization Rate

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.

A Kinetic Study of the Thermal Isomerization of and Related Complexes

1975 ◽  
Vol 53 (12) ◽  
pp. 1735-1738 ◽  
Author(s):  
William R. Cullen ◽  
Frank L. Hou
Keyword(s):  
Kinetic Study ◽  
Thermal Isomerization ◽  
Isomerization Reaction ◽  
Kinetics Of

The kinetics of the unimolecular isomerization reaction[Formula: see text]have been studied. The ΔH≠ values in kcal mol−1 are 36.8 ± 2.0 (M = M′ = Mn ), 46.8 ± 0.5 (M = M′ = Re ), 39.2 ± 2.8 (M = Mn, M′ = Re ). The mechanism of the rearrangement is discussed.

The Thermal Isomerization of Tropilidene

1963 ◽  
Vol 85 (2) ◽  
pp. 130-132 ◽  
Author(s):  
Kirby N. Klump ◽  
John P. Chesick
Keyword(s):  
Thermal Isomerization

Kinetics of the Thermal Isomerization of Methylcyclopropane†

1999 ◽  
Vol 103 (3) ◽  
pp. 362-364 ◽  
Author(s):  
Bansi L. Kalra ◽  
Janet Y. Cho ◽  
David K. Lewis
Keyword(s):  
Thermal Isomerization ◽  
Kinetics Of
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