1
|
Nafady A, Albaqami MD, Alotaibi AM. CuO nanoparticles embedded in conductive PANI framework for periodic detection of alcohol from sweat. Colloid Polym Sci 2023. [DOI: 10.1007/s00396-023-05086-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/29/2023]
|
2
|
Varga V, Štefuca V, Mihálová L, Levarski Z, Struhárňanská E, Blaško J, Kubinec R, Farkaš P, Sitkey V, Turňa J, Rosenberg M, Stuchlík S. Recombinant Enzymatic Redox Systems for Preparation of Aroma Compounds by Biotransformation. Front Microbiol 2021; 12:684640. [PMID: 34248905 PMCID: PMC8264508 DOI: 10.3389/fmicb.2021.684640] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2021] [Accepted: 05/03/2021] [Indexed: 11/13/2022] Open
Abstract
The aim of this study was to develop immobilized enzyme systems that reduce carbonyl compounds to their corresponding alcohols. The demand for natural aromas and food additives has been constantly growing in recent years. However, it can no longer be met by extraction and isolation from natural materials. One way to increase the availability of natural aromas is to prepare them by the enzymatic transformation of suitable precursors. Recombinant enzymes are currently being used for this purpose. We investigated trans-2-hexenal bioreduction by recombinant Saccharomyces cerevisiae alcohol dehydrogenase (ScADH1) with simultaneous NADH regeneration by recombinant Candida boidinii formate dehydrogenase (FDH). In a laboratory bioreactor with two immobilized enzymes, 88% of the trans-2-hexenal was transformed to trans-2-hexenol. The initial substrate concentration was 3.7 mM. The aldehyde destabilized ScADH1 by eluting Zn2+ ions from the enzyme. A fed-batch operation was used and the trans-2-hexenal concentration was maintained at a low level to limit the negative effect of Zn2+ ion elution from the immobilized ScADH1. Another immobilized two-enzyme system was used to reduce acetophenone to (S)-1-phenylethanol. To this end, the recombinant alcohol dehydrogenase (RrADH) from Rhodococcus ruber was used. This biocatalytic system converted 61% of the acetophenone to (S)-1-phenylethanol. The initial substrate concentration was 8.3 mM. All enzymes were immobilized by poly-His tag to Ni2+, which formed strong but reversible bonds that enabled carrier reuse after the loss of enzyme activity.
Collapse
Affiliation(s)
- Viktor Varga
- Department of Molecular Biology, Faculty of Natural Sciences, Comenius University, Bratislava, Slovakia
| | - Vladimír Štefuca
- Institute of Biotechnology, Faculty of Food and Chemical Technology, Slovak University of Technology, Bratislava, Slovakia
| | - Lenka Mihálová
- Institute of Biotechnology, Faculty of Food and Chemical Technology, Slovak University of Technology, Bratislava, Slovakia
| | - Zdenko Levarski
- Department of Molecular Biology, Faculty of Natural Sciences, Comenius University, Bratislava, Slovakia.,Science Park of Comenius University, Bratislava, Slovakia
| | - Eva Struhárňanská
- Department of Molecular Biology, Faculty of Natural Sciences, Comenius University, Bratislava, Slovakia
| | - Jaroslav Blaško
- Department of Analytical Chemistry, Faculty of Natural Sciences, Comenius University, Bratislava, Slovakia
| | - Robert Kubinec
- Department of Analytical Chemistry, Faculty of Natural Sciences, Comenius University, Bratislava, Slovakia
| | | | | | - Ján Turňa
- Department of Molecular Biology, Faculty of Natural Sciences, Comenius University, Bratislava, Slovakia.,Science Park of Comenius University, Bratislava, Slovakia
| | - Michal Rosenberg
- Institute of Biotechnology, Faculty of Food and Chemical Technology, Slovak University of Technology, Bratislava, Slovakia
| | - Stanislav Stuchlík
- Department of Molecular Biology, Faculty of Natural Sciences, Comenius University, Bratislava, Slovakia.,Science Park of Comenius University, Bratislava, Slovakia
| |
Collapse
|
3
|
Thungon PD, Kakoti A, Ngashangva L, Goswami P. Advances in developing rapid, reliable and portable detection systems for alcohol. Biosens Bioelectron 2017; 97:83-99. [PMID: 28577501 DOI: 10.1016/j.bios.2017.05.041] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2017] [Revised: 05/16/2017] [Accepted: 05/22/2017] [Indexed: 02/08/2023]
Abstract
Development of portable, reliable, sensitive, simple, and inexpensive detection system for alcohol has been an instinctive demand not only in traditional brewing, pharmaceutical, food and clinical industries but also in rapidly growing alcohol based fuel industries. Highly sensitive, selective, and reliable alcohol detections are currently amenable typically through the sophisticated instrument based analyses confined mostly to the state-of-art analytical laboratory facilities. With the growing demand of rapid and reliable alcohol detection systems, an all-round attempt has been made over the past decade encompassing various disciplines from basic and engineering sciences. Of late, the research for developing small-scale portable alcohol detection system has been accelerated with the advent of emerging miniaturization techniques, advanced materials and sensing platforms such as lab-on-chip, lab-on-CD, lab-on-paper etc. With these new inter-disciplinary approaches along with the support from the parallel knowledge growth on rapid detection systems being pursued for various targets, the progress on translating the proof-of-concepts to commercially viable and environment friendly portable alcohol detection systems is gaining pace. Here, we summarize the progress made over the years on the alcohol detection systems, with a focus on recent advancement towards developing portable, simple and efficient alcohol sensors.
Collapse
Affiliation(s)
- Phurpa Dema Thungon
- Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India
| | - Ankana Kakoti
- Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India
| | - Lightson Ngashangva
- Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India
| | - Pranab Goswami
- Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India.
| |
Collapse
|