Revealing the structural inhomogeneity of lignins from sweet sorghum stem by successive alkali extractions

被引：0
|
作者：
Sun, Shao-Long [1 ]
Wen, Jia-Long [1 ]
Ma, Ming-Guo [1 ]
Li, Ming-Fei [1 ]
Sun, Run-Cang [1 ,2 ]
机构：
[1] Sun, Shao-Long
[2] Wen, Jia-Long
[3] Ma, Ming-Guo
[4] Li, Ming-Fei
[5] 1,Sun, Run-Cang
来源：
Sun, R.-C. (rcsun3@bjfu.edu.cn) | 1600年 / American Chemical Society卷 / 61期
关键词：
To investigate the inhomogeneity of the lignin from sweet sorghum stem; successive alkali treatments were applied to extract lignin fragments in the present study. The successive treatments released 80.3% of the original lignin from the sorghum stem. The chemical structural inhomogeneity of the isolated lignins was comparatively and comprehensively investigated by UV; FT-IR; and NMR spectra. The lignins were found to be predominantly composed of β-O-4′ aryl ether linkages; together with minor amounts of β-β′; β-5′; β-1′; and; α; β- diaryl ether linkages. In addition; hydroxycinnamic acid (mainly p-coumaric acid); which was found to be attached to lignin; was released and co-precipitated in the lignin fractions isolated in the initial extracting steps; whereas hydroxycinnamic acids (p-coumaric and ferulic acids) were not detected in the subsequently extracted lignin fractions. Moreover; the high proportion of carbon-carbon structures was potentially related to the high amounts of guaiacyl units in the lignin investigated. Thermogravimetric analysis revealed that the higher molecular weights of lignins resulted in relatively higher thermal stability; and the higher content of C-C structures in the lignin probably led to a higher char residue. These findings suggested that the lignin fractions extracted from sweet sorghum stem by successive alkali extractions had inhomogeneous features in both chemical composition and structure. © 2013 American Chemical Society;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Journal article (JA)
引用
收藏
页码：4226 / 4235
相关论文
共 50 条
  • [21] Structural and physicochemical characteristics of starch from sugar cane and sweet sorghum stalks
    Alves, Fernanda Viginotti
    Polesi, Luis Fernando
    Aguiar, Claudio Lima
    Silveira Sarmento, Silene Bruder
    CARBOHYDRATE POLYMERS, 2014, 111 : 592 - 597
  • [22] Quantitative structural characterization of the lignins from the stem and pith of bamboo (Phyllostachys pubescens)
    Wen, Jia-Long
    Sun, Shao-Long
    Xue, Bai-Liang
    Sun, Run-Cang
    HOLZFORSCHUNG, 2013, 67 (06) : 613 - 627
  • [23] Physicochemical Characterization of Hemicelluloses Obtained by Graded Ethanol Precipitation from Sweet Sorghum Stem
    Nie, Xiao-Ni
    She, Diao
    Liang, Zong-Suo
    Geng, Zeng-Chao
    Wang, Hai-Tao
    Wang, Kun
    JOURNAL OF BIOBASED MATERIALS AND BIOENERGY, 2011, 5 (02) : 265 - 274
  • [24] Phaffia rhodozyma cultivation on structural and non-structural sugars from sweet sorghum for astaxanthin generation
    Stoklosa, Ryan J.
    Johnston, David B.
    Nghiem, Nhuan P.
    PROCESS BIOCHEMISTRY, 2019, 83 : 9 - 17
  • [25] Structural features and antioxidant activities of degraded lignins from steam exploded bamboo stem
    Sun, Shao-Long
    Wen, Jia-Long
    Ma, Ming-Guo
    Sun, Run-Cang
    Jones, Gwynn Lloyd
    INDUSTRIAL CROPS AND PRODUCTS, 2014, 56 : 128 - 136
  • [26] Optimization of ethanol production from bagasse and juice of sweet sorghum stem by simultaneous saccharification and fermentation
    Chen C.
    Wang Z.
    Ma Q.
    Zhang L.
    Xi Y.
    Dun B.
    Li G.
    Lu M.
    Du F.
    Xi, Yajun (xiyajun11@126.com), 1600, Chinese Society of Agricultural Engineering (32): : 253 - 258
  • [27] Successive Fractionations of Hemicelluloses and Lignin from Sorghum Stem by Sodium Hydroxide Aqueous Solutions with Increased Concentrations
    Xu, Ji-Dong
    Li, Xu Ming-Fei
    Sun, Run-Cang
    BIORESOURCES, 2018, 13 (02): : 2356 - 2373
  • [28] Improvement of a continuous ethanol fermentation from sweet sorghum stem juice using a cell recycling system
    Thani, Arthit
    Laopaiboon, Pattana
    Laopaiboon, Lakkana
    JOURNAL OF BIOTECHNOLOGY, 2017, 251 : 21 - 29
  • [29] Ethanol Production from the Stem Juice of Different Sweet Sorghum Cultivars in the State of Pernambuco, Northeast of Brazil
    Emmanuel D. Dutra
    Adauto Gomes Barbosa Neto
    Rafael Barros de Souza
    Marcos Antonio de Morais Junior
    Jose Nildo Tabosa
    Rômulo Simões Cezar Menezes
    Sugar Tech, 2013, 15 : 316 - 321
  • [30] Continuous ethanol production from sweet sorghum stem juice using stirred tank and tubular bioreactors
    Khongsay, Naulchan
    Laopaiboon, Lakkana
    Laopaiboon, Pattana
    JOURNAL OF BIOTECHNOLOGY, 2008, 136 : S446 - S446
12345