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Title: Characteristics of Hot Water Extracts from the Bark of Cultivated Willow ( Salix sp.)

Abstract

Willow bark is a rich source of heterogeneous polyphenolic compounds and a potential feedstock for biorefinery processes aiming at chemicals and fiber production. Here, mild hot water treatment of willow hybrid Karin was studied to find a practical means of isolating its non-cell-wall components for their utilization in a willow biorefinery proposed to aid valorization of the willow biomass. A short aqueous treatment of the bark at 80 °C liberated the extract in >20% yield under unpressurized conditions. The extract was characterized using mainly gas chromatography-mass spectrometry and one- and two-dimensional NMR techniques. Authentic analytes were applied to confirm the identification and quantification of the main components that were picein, (+)-catechin, triandrin, glucose, and fructose. Fructose was converted into 5-hydroxymethylfurfural in an acidic treatment which led to its condensation with the phenolic components and formation of a recalcitrant precipitate that should be avoided.

Authors:
 [1]; ORCiD logo [2];  [1];  [3];  [3];  [4];  [2];  [2]; ORCiD logo [3]; ORCiD logo [1]
  1. Aalto Univ. (Finland)
  2. Åbo Akademi Univ., Turku (Finland)
  3. Univ. of Wisconsin, Madison, WI (United States)
  4. Univ. of Helsinki (Finland); Technische Univ. Berlin (Germany)
Publication Date:
Research Org.:
Great Lakes Bioenergy Research Center, Madison, WI (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Biological and Environmental Research (BER) (SC-23)
OSTI Identifier:
1505796
Grant/Contract Number:  
SC0018409
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
ACS Sustainable Chemistry & Engineering
Additional Journal Information:
Journal Volume: 6; Journal Issue: 4; Journal ID: ISSN 2168-0485
Publisher:
American Chemical Society (ACS)
Country of Publication:
United States
Language:
English
Subject:
59 BASIC BIOLOGICAL SCIENCES; 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; (+)-Catechin; 5-Hydroxymethylfurfural; Fructose; Picein; Triandrin; Willow bark

Citation Formats

Dou, Jinze, Xu, Wenyang, Koivisto, Jari J., Mobley, Justin K., Padmakshan, Dharshana, Kögler, Martin, Xu, Chunlin, Willför, Stefan, Ralph, John, and Vuorinen, Tapani. Characteristics of Hot Water Extracts from the Bark of Cultivated Willow (Salix sp.). United States: N. p., 2018. Web. doi:10.1021/acssuschemeng.8b00498.
Dou, Jinze, Xu, Wenyang, Koivisto, Jari J., Mobley, Justin K., Padmakshan, Dharshana, Kögler, Martin, Xu, Chunlin, Willför, Stefan, Ralph, John, & Vuorinen, Tapani. Characteristics of Hot Water Extracts from the Bark of Cultivated Willow (Salix sp.). United States. doi:10.1021/acssuschemeng.8b00498.
Dou, Jinze, Xu, Wenyang, Koivisto, Jari J., Mobley, Justin K., Padmakshan, Dharshana, Kögler, Martin, Xu, Chunlin, Willför, Stefan, Ralph, John, and Vuorinen, Tapani. Wed . "Characteristics of Hot Water Extracts from the Bark of Cultivated Willow (Salix sp.)". United States. doi:10.1021/acssuschemeng.8b00498. https://www.osti.gov/servlets/purl/1505796.
@article{osti_1505796,
title = {Characteristics of Hot Water Extracts from the Bark of Cultivated Willow (Salix sp.)},
author = {Dou, Jinze and Xu, Wenyang and Koivisto, Jari J. and Mobley, Justin K. and Padmakshan, Dharshana and Kögler, Martin and Xu, Chunlin and Willför, Stefan and Ralph, John and Vuorinen, Tapani},
abstractNote = {Willow bark is a rich source of heterogeneous polyphenolic compounds and a potential feedstock for biorefinery processes aiming at chemicals and fiber production. Here, mild hot water treatment of willow hybrid Karin was studied to find a practical means of isolating its non-cell-wall components for their utilization in a willow biorefinery proposed to aid valorization of the willow biomass. A short aqueous treatment of the bark at 80 °C liberated the extract in >20% yield under unpressurized conditions. The extract was characterized using mainly gas chromatography-mass spectrometry and one- and two-dimensional NMR techniques. Authentic analytes were applied to confirm the identification and quantification of the main components that were picein, (+)-catechin, triandrin, glucose, and fructose. Fructose was converted into 5-hydroxymethylfurfural in an acidic treatment which led to its condensation with the phenolic components and formation of a recalcitrant precipitate that should be avoided.},
doi = {10.1021/acssuschemeng.8b00498},
journal = {ACS Sustainable Chemistry & Engineering},
issn = {2168-0485},
number = 4,
volume = 6,
place = {United States},
year = {2018},
month = {2}
}

Journal Article:
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