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Tapping the Bioactivity Potential of Residual Stream from Its Pretreatments May Be a Green Strategy for Low-Cost Bioconversion of Rice Straw

In this study, it was found that the residual stream from pretreatments of rice straw exhibited high antioxidant activity. Assays based on the Folin–Ciocalteu colorimetric method confirmed that the residual stream contained large amounts of phenolic compounds. Three antioxidant assays were employed...

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Autores principales: Chen, Xingxuan, Wang, Xiahui, Xue, Yiyun, Zhang, Tian-Ao, Hu, Jiajun, Tsang, Yiu Fai, Gao, Min-Tian
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Springer US 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6209036/
https://www.ncbi.nlm.nih.gov/pubmed/29658061
http://dx.doi.org/10.1007/s12010-018-2751-1
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author Chen, Xingxuan
Wang, Xiahui
Xue, Yiyun
Zhang, Tian-Ao
Hu, Jiajun
Tsang, Yiu Fai
Gao, Min-Tian
author_facet Chen, Xingxuan
Wang, Xiahui
Xue, Yiyun
Zhang, Tian-Ao
Hu, Jiajun
Tsang, Yiu Fai
Gao, Min-Tian
author_sort Chen, Xingxuan
collection PubMed
description In this study, it was found that the residual stream from pretreatments of rice straw exhibited high antioxidant activity. Assays based on the Folin–Ciocalteu colorimetric method confirmed that the residual stream contained large amounts of phenolic compounds. Three antioxidant assays were employed to evaluate the bioactivity of the residual stream. Strong linear correlations existed among the release of phenolic compounds, saccharification efficiency, and antioxidant activity. The alkaline pretreatment provided a much greater release of phenolic compounds, especially phenolic acids, compared to the acid pretreatment, and consequently, it had stronger linear correlations than the acid pretreatment. Antibacterial experiments demonstrated the ability of the phenolic compounds in the residual stream to inhibit the growth of microorganisms, indicating the potential of these compounds as antimicrobial agents. To discuss the possibility of the co-production of antimicrobial agents and biofuels/biochemicals, both acid and alkaline pretreatments were optimized using response surface methodology. Under the optimal conditions, 285.7 g glucose could be produced from 1 kg rice straw with the co-production of 3.84 g FA and 6.98 g p-CA after alkaline pretreatment. These results show that the recovery of phenolic compounds from the residual stream could be a green strategy for the low-cost bioconversion of rice straw. ELECTRONIC SUPPLEMENTARY MATERIAL: The online version of this article (10.1007/s12010-018-2751-1) contains supplementary material, which is available to authorized users.
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spelling pubmed-62090362018-11-13 Tapping the Bioactivity Potential of Residual Stream from Its Pretreatments May Be a Green Strategy for Low-Cost Bioconversion of Rice Straw Chen, Xingxuan Wang, Xiahui Xue, Yiyun Zhang, Tian-Ao Hu, Jiajun Tsang, Yiu Fai Gao, Min-Tian Appl Biochem Biotechnol Article In this study, it was found that the residual stream from pretreatments of rice straw exhibited high antioxidant activity. Assays based on the Folin–Ciocalteu colorimetric method confirmed that the residual stream contained large amounts of phenolic compounds. Three antioxidant assays were employed to evaluate the bioactivity of the residual stream. Strong linear correlations existed among the release of phenolic compounds, saccharification efficiency, and antioxidant activity. The alkaline pretreatment provided a much greater release of phenolic compounds, especially phenolic acids, compared to the acid pretreatment, and consequently, it had stronger linear correlations than the acid pretreatment. Antibacterial experiments demonstrated the ability of the phenolic compounds in the residual stream to inhibit the growth of microorganisms, indicating the potential of these compounds as antimicrobial agents. To discuss the possibility of the co-production of antimicrobial agents and biofuels/biochemicals, both acid and alkaline pretreatments were optimized using response surface methodology. Under the optimal conditions, 285.7 g glucose could be produced from 1 kg rice straw with the co-production of 3.84 g FA and 6.98 g p-CA after alkaline pretreatment. These results show that the recovery of phenolic compounds from the residual stream could be a green strategy for the low-cost bioconversion of rice straw. ELECTRONIC SUPPLEMENTARY MATERIAL: The online version of this article (10.1007/s12010-018-2751-1) contains supplementary material, which is available to authorized users. Springer US 2018-04-16 2018 /pmc/articles/PMC6209036/ /pubmed/29658061 http://dx.doi.org/10.1007/s12010-018-2751-1 Text en © The Author(s) 2018 Open Access This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
spellingShingle Article
Chen, Xingxuan
Wang, Xiahui
Xue, Yiyun
Zhang, Tian-Ao
Hu, Jiajun
Tsang, Yiu Fai
Gao, Min-Tian
Tapping the Bioactivity Potential of Residual Stream from Its Pretreatments May Be a Green Strategy for Low-Cost Bioconversion of Rice Straw
title Tapping the Bioactivity Potential of Residual Stream from Its Pretreatments May Be a Green Strategy for Low-Cost Bioconversion of Rice Straw
title_full Tapping the Bioactivity Potential of Residual Stream from Its Pretreatments May Be a Green Strategy for Low-Cost Bioconversion of Rice Straw
title_fullStr Tapping the Bioactivity Potential of Residual Stream from Its Pretreatments May Be a Green Strategy for Low-Cost Bioconversion of Rice Straw
title_full_unstemmed Tapping the Bioactivity Potential of Residual Stream from Its Pretreatments May Be a Green Strategy for Low-Cost Bioconversion of Rice Straw
title_short Tapping the Bioactivity Potential of Residual Stream from Its Pretreatments May Be a Green Strategy for Low-Cost Bioconversion of Rice Straw
title_sort tapping the bioactivity potential of residual stream from its pretreatments may be a green strategy for low-cost bioconversion of rice straw
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6209036/
https://www.ncbi.nlm.nih.gov/pubmed/29658061
http://dx.doi.org/10.1007/s12010-018-2751-1
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