scholarly journals Immobilization of Phenylalanine Ammonia-Lyase on Single-Walled Carbon Nanotubes for Stereoselective Biotransformations in Batch and Continuous-Flow Modes

ChemCatChem ◽  
2015 ◽  
Vol 7 (7) ◽  
pp. 1122-1128 ◽  
Author(s):  
Judith H. Bartha-Vári ◽  
Monica I. Toşa ◽  
Florin-Dan Irimie ◽  
Diána Weiser ◽  
Zoltán Boros ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Continuous Flow ◽  
Phenylalanine Ammonia Lyase ◽  
Single Walled Carbon Nanotubes ◽  
Single Walled Carbon ◽  
Walled Carbon Nanotubes

scholarly journals Aminated Single-walled Carbon Nanotubes as Carrier for Covalent Immobilization of Phenylalanine Ammonia-lyase

2017 ◽  
Vol 61 (1) ◽  
pp. 59 ◽  
Author(s):  
Judith Hajnal Bartha-Vári ◽  
László Csaba Bencze ◽  
Evelin Bell ◽  
László Poppe ◽  
Gabriel Katona ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Continuous Flow ◽  
Phenylalanine Ammonia Lyase ◽  
Kinetic Resolution ◽  
Single Walled Carbon Nanotubes ◽  
Packed Bed Reactor ◽  
Original Activity ◽  
Single Walled Carbon ◽  
Ammonia Addition ◽  
Walled Carbon Nanotubes

A new and efficient immobilized form of phenylalanine ammonia-lyase (PAL) was obtained by covalent linkage onto amino functionalized single-walled carbon nanotubes (SwCNTNH2) as carrier. The catalytic properties of the resulted nanostructured biocatalyst (SwCNTNH2-PAL) were tested in the kinetic resolution of racemic 2-amino-3-(thiophen-2-yl)propanoic acid 1 by ammonia elimination and in the enantiotope selective addition of ammonia onto (E)-3-(thiophen-2-yl)acrylic acid 2. SwCNTNH2-PAL was a durable biocatalyst in batch mode for ammonia elimination from 1 (>85% of original activity after 7 cycles) and in ammonia addition to 2 (>70% of original activity after 3 cycles in 6 M NH3 , pH 10.0). The ammonia addition onto 2 was also studied in a continuous-flow microreactor packed with SwCNTNH2-PAL (2 M NH3, pH 10.0, 15 bar) in the 30-80 °C temperature range. No significant loss of PAL activity was observed over 72 h in the microreactor up to 60 °C. Productivity of SwCNTNH2-PAL at 30 °C was significantly higher in the enantiotope selective ammonia addition performed in a packed-bed reactor operated in continuous-flow mode (rflow =2.41 mmol min-1 g-1) than in the reaction performed in batch system (rbatch = 1.38 mmol min-1 g-1).

scholarly journals Controlled slicing of single walled carbon nanotubes under continuous flow

Carbon ◽  
2018 ◽  
Vol 140 ◽  
pp. 428-432 ◽  
Author(s):  
Thaar M.D. Alharbi ◽  
Kasturi Vimalanathan ◽  
Warren D. Lawrance ◽  
Colin L. Raston
Keyword(s):  
Carbon Nanotubes ◽  
Continuous Flow ◽  
Single Walled Carbon Nanotubes ◽  
Single Walled Carbon ◽  
Walled Carbon Nanotubes

scholarly journals Catalytic nanoreactors in continuous flow: hydrogenation inside single-walled carbon nanotubes using supercritical CO2

2014 ◽  
Vol 50 (40) ◽  
pp. 5200-5202 ◽  
Author(s):  
Thomas W. Chamberlain ◽  
James H. Earley ◽  
Daniel P. Anderson ◽  
Andrei N. Khlobystov ◽  
Richard A. Bourne
Keyword(s):  
Carbon Nanotubes ◽  
Chemical Reactions ◽  
Continuous Flow ◽  
Supercritical Co2 ◽  
Single Walled Carbon Nanotubes ◽  
Reaction Vessel ◽  
Preparative Scale ◽  
Single Walled Carbon ◽  
Walled Carbon Nanotubes

One nanometre wide carbon nanoreactors are utilised as the reaction vessel for catalytic chemical reactions on a preparative scale.

Purity Evaluation of Single-Walled Carbon Nanotubes Using Thermogravimetric Analysis

2013 ◽  
Vol 51 (2) ◽  
pp. 137-144
Author(s):  
Naesung Lee ◽  
Jeung Choon Goak ◽  
Tae Yang Kim ◽  
Jongwan Jung ◽  
Young-Soo Seo ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Thermogravimetric Analysis ◽  
Single Walled Carbon Nanotubes ◽  
Single Walled Carbon ◽  
Purity Evaluation ◽  
Walled Carbon Nanotubes

Hybrid Bioactive Hydrogels Containing Single-Walled Carbon Nanotubes Covalently Integrated via Strain-Promoted Azide-Alkyne Cycloaddition

2012 ◽  
Vol 2 (2) ◽  
pp. 200-209 ◽  
Author(s):  
Jurgen Bachl ◽  
Thimo Huber ◽  
Dennis Kuhbeck ◽  
Eva-Maria Schon ◽  
Gabriele Brunner ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Single Walled Carbon Nanotubes ◽  
Single Walled Carbon ◽  
Walled Carbon Nanotubes
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