scholarly journals Front Cover Picture: Continuous Flow Bioamination of Ketones in Organic Solvents at Controlled Water Activity using Immobilized ω‐Transaminases (Adv. Synth. Catal. 9/2020)

2020 ◽  
Vol 362 (9) ◽  
pp. 1723-1723
Author(s):  
Wesley Böhmer ◽  
Alexey Volkov ◽  
Karim Engelmark Cassimjee ◽  
Francesco G. Mutti
Keyword(s):  
Organic Solvents ◽  
Water Activity ◽  
Continuous Flow ◽  
Front Cover

scholarly journals Continuous Flow Bioamination of Ketones in Organic Solvents at Controlled Water Activity using Immobilized ω‐Transaminases

2020 ◽  
Vol 362 (9) ◽  
pp. 1858-1867 ◽  
Author(s):  
Wesley Böhmer ◽  
Alexey Volkov ◽  
Karim Engelmark Cassimjee ◽  
Francesco G. Mutti
Keyword(s):  
Organic Solvents ◽  
Water Activity ◽  
Continuous Flow

scholarly journals Influence of Water Activity on Protease Adsorbed on Biochar in Organic Solvents

2017 ◽  
Vol 6 (4) ◽  
pp. 96 ◽  
Author(s):  
Hidetaka Noritomi ◽  
Jumpei Nishigami ◽  
Nobuyuki Endo ◽  
Satoru Kato ◽  
Katsumi Uchiyama
Keyword(s):  
Thermal Stability ◽  
Catalytic Activity ◽  
Organic Solvents ◽  
Water Activity ◽  
Initial Rate ◽  
Butyl Ester ◽  
Nitrogen Atmosphere ◽  
Bamboo Charcoal ◽  
Influence Of Water ◽  
Hydrolysis Of

We have found that the organic solvent-resistance of Alpha-chymotrypsin (Alpha-CT) is enhanced by adsorbing Alpha-CT onto bamboo charcoal powder (BCP), which is obtained by pyrolyzing bamboo waste under nitrogen atmosphere, and is markedly dependent on the thermodynamic water activity (aw) in organic solvents. When BCP-adsorbed　Alpha-CT was immersed in acetonitrile at an appropriate water activity, it effectively enhanced the transesterification of N-acetyl-L-tyrosine ethyl ester (N-Ac-Tyr-OEt) with n-butanol (BuOH) to produce N-acetyl-L-tyrosine butyl ester (N-Ac-Tyr-OBu), compared to the hydrolysis of N-Ac-Tyr-OEt with water to give N-acetyl-L-tyrosine (N-Ac-Tyr-OH). When the water activity was 0.28, the initial rate of transesterification catalyzed by BCP-adsorbed Alpha-CT was about sixty times greater than that catalyzed by free Alpha-CT. Regarding the reaction selectivity which is defined as a ratio of the initial rate of transesterification to that of hydrolysis, BCP-adsorbed α-CT was much superior to free Alpha-CT. The catalytic activity of BCP-adsorbed Alpha-CT was markedly dependent on the reaction temperature. Furthermore, concerning the thermal stability at 50 oC, the half-life of BCP-adsorbed Alpha-CT exhibited 3.8-fold, compared to that of free Alpha-CT.

Continuous Flow Synthesis of Chiral Amines in Organic Solvents: Immobilization of E. coli Cells Containing Both ω-Transaminase and PLP

2014 ◽  
Vol 16 (23) ◽  
pp. 6092-6095 ◽  
Author(s):  
Leandro H. Andrade ◽  
Wolfgang Kroutil ◽  
Timothy F. Jamison
Keyword(s):  
Organic Solvents ◽  
Continuous Flow ◽  
Chiral Amines ◽  
Flow Synthesis ◽  
E Coli

Front Cover: Photooxidation of Fulvenes in a Continuous Flow Photoreactor using Carbon Dioxide as a Solvent (ChemPhotoChem 7/2018)

ChemPhotoChem ◽  
2018 ◽  
Vol 2 (7) ◽  
pp. 507-507
Author(s):  
Lingqiao Wu ◽  
Darren S. Lee ◽  
Hamza Boufroura ◽  
Martyn Poliakoff ◽  
Michael W. George
Keyword(s):  
Carbon Dioxide ◽  
Continuous Flow ◽  
Front Cover

scholarly journals Front Cover: Design of a Mesoscale Continuous-Flow Route toward Lithiated Methoxyallene (ChemSusChem 13/2018)

ChemSusChem ◽  
2018 ◽  
Vol 11 (13) ◽  
pp. 1990-1990
Author(s):  
Sofie Seghers ◽  
Thomas S. A. Heugebaert ◽  
Matthias Moens ◽  
Jolien Sonck ◽  
Joris W. Thybaut ◽  
...  
Keyword(s):  
Continuous Flow ◽  
Front Cover ◽  
Cover Design

scholarly journals Front Cover: Solvophobically Driven Complexation of Adamantyl Mannoside with β‐Cyclodextrin in Water and Structured Organic Solvents (Chem. Eur. J. 23/2020)

2020 ◽  
Vol 26 (23) ◽  
pp. 5100-5100
Author(s):  
Katarina Leko ◽  
Marko Hanževački ◽  
Zlatko Brkljača ◽  
Katarina Pičuljan ◽  
Rosana Ribić ◽  
...  
Keyword(s):  
Organic Solvents ◽  
Front Cover
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