Kinetic Study of Coniferyl Alcohol Radical Binding to the (+)-Pinoresinol Forming Dirigent Protein†

Biochemistry ◽  
2004 ◽  
Vol 43 (9) ◽  
pp. 2587-2595 ◽  
Author(s):  
Steven C. Halls ◽  
Laurence B. Davin ◽  
David M. Kramer ◽  
Norman G. Lewis
Keyword(s):  
Kinetic Study ◽  
Coniferyl Alcohol ◽  
Dirigent Protein ◽  
Alcohol Radical

scholarly journals Coniferyl Alcohol Radical Detection by the Dirigent Protein At DIR6 Monitored by EPR

ChemBioChem ◽  
2020 ◽  
Author(s):  
Camille Modolo ◽  
Lu Ren ◽  
Eric Besson ◽  
Viviane Robert ◽  
Stéphane Gastaldi ◽  
...  
Keyword(s):  
Coniferyl Alcohol ◽  
Dirigent Protein ◽  
Radical Detection ◽  
Alcohol Radical

Formation of β-O-4 Lignin Models -A Theoretical Study

Holzforschung ◽  
2003 ◽  
Vol 57 (5) ◽  
pp. 466-478 ◽  
Author(s):  
B. Durbeej ◽  
L. A. Eriksson
Keyword(s):  
Reaction Mechanisms ◽  
Density Functional Calculations ◽  
Energy Barrier ◽  
Density Functional ◽  
Theoretical Study ◽  
Coniferyl Alcohol ◽  
Quinone Methide ◽  
Reaction Energy ◽  
Alcohol Radical

Summary The formation of two different β-O-4 lignin models is investigated by means of density functional calculations. It is found that the coupling of two coniferyl alcohol radicals forming a quinone methide proceeds by an energy barrier of ~2–5 kcal/mol, and that the associated reaction energy is negative by more than 20 kcal/mol. On the basis of the corresponding results obtained for the coupling of a coniferyl alcohol radical to a coniferyl alcohol, it is argued that the resulting radical, albeit being formed in an energetically less favourable process, might play an important role in lignin polymerisation. Finally, two different reaction mechanisms for the conversion of a quinone methide into a guaiacylglycerol-β-coniferyl ether dilignol through the addition of water are explored.

Kinetic study on the heterogeneous degradation of coniferyl alcohol by OH radicals

Chemosphere ◽  
2020 ◽  
Vol 241 ◽  
pp. 125088 ◽  
Author(s):  
Changgeng Liu ◽  
Yucan He ◽  
Xiao’e Chen
Keyword(s):  
Kinetic Study ◽  
Coniferyl Alcohol ◽  
Oh Radicals

A kinetic study of osmium tetroxide catalysed oxidation of methyl digol and ethyl digol by hexacyanoferrate (III) in aqueous alkaline medium

1976 ◽  
Vol 73 ◽  
pp. 283-286 ◽  
Author(s):  
H. S. Singh ◽  
A. K. Sisodia ◽  
S. M. Singh ◽  
R. K. Singh ◽  
R. N. Singh
Keyword(s):  
Kinetic Study ◽  
Alkaline Medium ◽  
Osmium Tetroxide ◽  
Aqueous Alkaline Medium ◽  
Catalysed Oxidation

A kinetic study of controlling nitrogen in process for boron steel by using30N2isotope gas

2008 ◽  
Vol 105 (12) ◽  
pp. 601-608
Author(s):  
Seung Min Han ◽  
Dong Joon Min ◽  
Joo Hyun Park ◽  
Jung Ho Park ◽  
Jong Min Park
Keyword(s):  
Kinetic Study ◽  
Boron Steel

Kinetic Study of the Effect of Heparin on the Amidase Activity of Trypsin, Plasmin and Urokinase

1983 ◽  
Vol 49 (03) ◽  
pp. 199-203 ◽  
Author(s):  
V M Yomtova ◽  
N A Stambolieva ◽  
B M Blagoev
Keyword(s):  
Kinetic Study ◽  
Active Center ◽  
Simultaneous Presence ◽  
Amidase Activity ◽  
Competitive Inhibitors ◽  
Uncompetitive Inhibitor

SummaryIt was found that the effect of heparin on the amidase activity of urokinase (E C 3.4.21.31), plasmin (E C 3.4.21.7) and trypsin (E C 3.4.21.4) depended on the substrate used. No effect of heparin on the amidase activity of urokinase and trypsin was observed when Pyro Glu-Gly-Arg-p-nitroanilide (S-2444) and α-N-acetyl-L-lysine-p-nitroanilide (ALNA) were used as substrates. Heparin acted as a uncompetitive inhibitor of trypsin (Ki = 1.2×10-6 M), plasmin (Ki = 4.9×10-6 M) and urokinase (Ki = l.0×10-7 M) when Bz-Phe-Val-Arg-p-nitroanilide (S-2160), H-D-Val-Leu-Lys-p-nitroanilide (S-2251) and plasminogen, respectively, were used as substrates. These results, as well as the data obtained by studying the effect of the simultaneous presence of heparin and competitive inhibitors suggest that although heparin is not bound at the active center of these enzymes, it may influence the effectivity of catalysis.

A kinetic study of the metathesis of propene on a rhenium-aluminium catalyst

1981 ◽  
Vol 31 (1) ◽  
pp. 388-394 ◽  
Author(s):  
Mahmoud El-Sawi ◽  
Antonio Iannibello ◽  
Fernando Morelli ◽  
Ganfranco Gatalano ◽  
Francesco Intrieri ◽  
...  
Keyword(s):  
Kinetic Study
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