Comparative analysis of lignin chemical structures of sugarcane bagasse pretreated by alkaline, hydrothermal, and dilute sulfuric acid methods

Miyamoto, Takuji; Mihashi, Asako; Yamamura, Masaomi; Tobimatsu, Yuki; Suzuki, Shiro; Takada, Ritsuko; Kobayashi, Yoshinori; Umezawa, Toshiaki

doi:10.1016/j.indcrop.2018.04.077

Cited by 62 publications

(20 citation statements)

References 51 publications

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“…In the spectra of the samples of LTSL NPs black liquor to pH 3.8 and 2.8, the intensities of β‐O‐4 and β‐β signals were reduced compared with those observed in the spectrum of pH 4.8. These results are in accordance with previous acid pretreatment studies that indicated that considerable alterations of these major lignin linkage types, possibly via acid‐catalyzed depolymerization and condensation …”

Section: Resultssupporting

confidence: 93%

A Facile Preparation of Super Long‐Term Stable Lignin Nanoparticles from Black Liquor

Dai

et al. 2019

ChemSusChem

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Section: Resultssupporting

confidence: 93%

A Facile Preparation of Super Long‐Term Stable Lignin Nanoparticles from Black Liquor

Dai

et al. 2019

ChemSusChem

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“…2b and Additional file 1: Table S1). The result suggests that H-and G-lignins are more susceptible to acid-induced condensation reactions than S-lignins, possibly due to the higher reactivities of non-or less methoxylated H-and G-type aromatic rings than S-type aromatic rings in typical acid-catalyzed condensation reactions of lignins [51][52][53].…”

Section: Chemical Treatments Of Transgenic Rice Cell Wallsmentioning

confidence: 96%

Comparative evaluations of lignocellulose reactivity and usability in transgenic rice plants with altered lignin composition

et al. 2019

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The aromatic composition of lignins is considered an important trait that affects the physico-chemical properties of lignocellulosic biomass. However, our knowledge of the relationship between lignin structure and biomass utilization properties remains limited, especially in monocotyledonous grass species, despite their potential as biomass feedstocks. In this study, we used recently produced rice transgenic lines with distinct lignin monomer compositions, i.e., guaiacyl (G)/syringyl (S)/p-hydroxyphenyl (H) aromatic unit ratios, to study the impact of lignin composition on the chemical reactivity, enzymatic saccharification efficiency and calorific value of rice lignocellulose. The H-ligninenriched rice transgenic line showed significantly enhanced biomass saccharification efficiency after alkali and acid pretreatments and even without any pretreatment, whereas the S-lignin-enriched rice transgenic line displayed enhanced saccharification efficiency after liquid hot water pretreatment. While we detected no significant differences in biomass heating values between the transgenic rice materials tested, analysis of synthetic lignins comprising only G, S or H units suggested that increased ratios of G or H units could increase the heating value of lignin-based solid biofuels.

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“…Interestingly,t he cross peaks in the aromatic region significantly shifted comparedw ith those of the whole-cell walls and milled-wood lignin (MWL)o f the sugarcane bagasse (Table 3). [22,23] These results thus revealed that the native lignin structure wasr emarkably altered through sulfuric acid-catalyzed glycerolysis at 200 8C. (M w )o ft he acetylated FR 200 were1 320 and 2160, respectively, and the polydispersity was calculated as 1.65 (Table 4).…”

Section: Structural Analysis Of the Antiviral Substancementioning

confidence: 81%

Production of Antiviral Substance from Sugarcane Bagasse by Chemical Alteration of its Native Lignin Structure through Microwave Solvolysis

Kimura

Ouda

et al. 2020

ChemSusChem

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The production of bioactive agents from lignocelluloses has received limited attention because plant cell walls are essentially non‐bioactive. In this study, a chemical reaction is reported, which produces a lignin‐derived antiviral substance from sugarcane bagasse by microwave heating at 200 °C in aqueous glycerol containing 0.5 % H2SO4. The purified fraction, designated as FR200, strongly inhibited the replication of encephalomyocarditis virus (EMCV) in L929 cells without cytotoxicity. HSQC NMR spectra demonstrated that the principal interunit linkages in the native lignin were cleaved by the reaction. Gel permeation chromatography (GPC) and pyrolysis‐GCMS revealed that FR200 is composed of oligomeric lignin with a weight average molecular weight of approximately 2000. When the bagasse was reacted at lower temperatures, 140 °C and 160 °C, the native lignin substructures were partially retained and the antiviral activity significantly decreased. The results thus indicate that the antiviral activity emerged through severe alteration of the native lignin structure. Furthermore, it was revealed that the antiviral lignin inactivated the EMCV virions through direct contact, as the innate immune system of L929 was not activated by FR200 treatment, and no antiviral activity was found when L929 was pre‐treated with the lignin before viral infection.

show abstract

Comparative analysis of lignin chemical structures of sugarcane bagasse pretreated by alkaline, hydrothermal, and dilute sulfuric acid methods

Cited by 62 publications

References 51 publications

A Facile Preparation of Super Long‐Term Stable Lignin Nanoparticles from Black Liquor

A Facile Preparation of Super Long‐Term Stable Lignin Nanoparticles from Black Liquor

Comparative evaluations of lignocellulose reactivity and usability in transgenic rice plants with altered lignin composition

Production of Antiviral Substance from Sugarcane Bagasse by Chemical Alteration of its Native Lignin Structure through Microwave Solvolysis

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