ChemInform Abstract: Recent Development of Enzymatic Reaction Systems Using Ionic Liquids

ChemInform ◽  
2009 ◽  
Vol 40 (28) ◽  
Author(s):  
Toshiyuki Itoh
Keyword(s):  
Ionic Liquids ◽  
Enzymatic Reaction ◽  
Reaction Systems

Ultrasound promotes enzymatic reactions by acting on different targets: Enzymes, substrates and enzymatic reaction systems

2018 ◽  
Vol 119 ◽  
pp. 453-461 ◽  
Author(s):  
Danli Wang ◽  
Lufeng Yan ◽  
Xiaobin Ma ◽  
Wenjun Wang ◽  
Mingming Zou ◽  
...  
Keyword(s):  
Enzymatic Reaction ◽  
Enzymatic Reactions ◽  
Reaction Systems

scholarly journals Ionic Liquids as Bifunctional Cosolvents Enhanced CO2 Conversion Catalysed by NADH-Dependent Formate Dehydrogenase

Catalysts ◽  
2018 ◽  
Vol 8 (8) ◽  
pp. 304 ◽  
Author(s):  
Zhibo Zhang ◽  
Bao-hua Xu ◽  
Jianquan Luo ◽  
Nicolas Solms ◽  
Hongyan He ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Dft Calculations ◽  
Formic Acid ◽  
Formate Dehydrogenase ◽  
Enzymatic Reaction ◽  
Reaction System ◽  
Co2 Concentration ◽  
Co2 Conversion ◽  
Low Co2

Efficient CO2 conversion by formate dehydrogenase is limited by the low CO2 concentrations that can be reached in traditional buffers. The use of ionic liquids was proposed as a manner to increase CO2 concentration in the reaction system. It has been found, however, that the required cofactor (NADH) heavily degraded during the enzymatic reaction and that acidity was the main reason. Acidity, indeed, resulted in reduction of the conversion of CO2 into formic acid and contributed to overestimate the amount of formic acid produced when the progression of the reaction was followed by a decrease in NADH absorbance (method N). Stability of NADH and the mechanism of NADH degradation was investigated by UV, NMR and by DFT calculations. It was found that by selecting neutral–basic ionic liquids and by adjusting the concentration of the ionic liquid in the buffer, the concentration of NADH can be maintained in the reaction system with little loss. Conversion of CO2 to methanol in BmimBF4 (67.1%) was more than twice as compared with the conversion attained by the enzymatic reaction in phosphate buffer (24.3%).

Steady state multiplicity and stability of enzymatic reaction systems

1973 ◽  
Vol 15 (6) ◽  
pp. 1131-1145 ◽  
Author(s):  
D. D. Bruns ◽  
J. E. Bailey ◽  
D. Luss
Keyword(s):  
Steady State ◽  
Enzymatic Reaction ◽  
Reaction Systems ◽  
State Multiplicity
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