Gaschromatographische Analyse von Ligninoxydationsprodukten. VIII. Zur Struktur des Lignins der Fichte.

Erickson, Magnus; Larsson, Sam; Miksche, Gerhard E.; Wiehager, Anne‐Charlotte; Lindgren, B.; Swahn, Carl‐Gunnar

doi:10.3891/acta.chem.scand.27-0903

Cited by 107 publications

(71 citation statements)

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“…Also, the data are consistent with the demonstration (25) (21,26), and among different species of angiosperms (27). The natural variation in substructure frequency is mainly a reflection of the relative proportions of the coniferyl and sinapyl (3,5-dimethoxy-4-hydroxycinnamyl) alcohol precursors.…”

supporting

confidence: 80%

Preparation and microbial decomposition of synthetic [14C]ligins.

Kirk¹,

Connors²,

Bleam³

et al. 1975

Proc. Natl. Acad. Sci. U.S.A.

200

113

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A definitive assay for microbiological and biochemical research on the biodegradation of lignin was developed using radioactive synthetic lignins specifically labeled in the side chains, aromatic rings or in the methoxyl groups. The [14C]lignins were prepared by oxidative polymerization with peroxidase and H2O2 Of specifically labeled coniferyl alcohol (4-hydroxy-3-methyoxycinnamyl alcohol). The synthetic polymers were shown by spectroscopic and chemical methods to contain the same intermonomer linkages found in natural lignins. Incubation of the [14C]lignins with known lignin-degrading fungi and with a forest soil resulted in 14CO2 evolution.

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supporting

confidence: 80%

Preparation and microbial decomposition of synthetic [14C]ligins.

Kirk¹,

Connors²,

Bleam³

et al. 1975

Proc. Natl. Acad. Sci. U.S.A.

200

113

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“…For beech (Fagus sylvatica) lignin, the relative content of these three units has been determined as G:S:H = 56:40:4 [33]. For spruce (Picea abies) lignin a ratio of G:S:H = 94:1:5 has been reported [34]. The differences in lignin composition with respect to the basic building blocks are illustrated by the guaiacol/syringol (G/S) ratio for the feedstocks which is approx.…”

Section: Resultsmentioning

confidence: 99%

Biomass valorisation by staged degasification

Wild

Uil

Reith

et al. 2009

Journal of Analytical and Applied Pyrolysis

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“…13 C-NMR analysis of a purified sulfonated lignin from Western hemlock revealed 2.0% phenolic hydroxyl, 17.5% sulfonate, 12.5% methoxy, and 0.6% carboxyl groups per unit weight of lignosulfonates (96). Additional studies indicate that lignosulfonates also contain limited numbers of olefinic, carbonyl, and catechol groups (97).…”

Section: Physical and Chemical Properties Of Lignosulfonates Even Unmentioning

confidence: 99%

“…However, most commercial possibilities rely on dilute acid or (11) (12) (13) dilute base hydrolysis (75). These biorefinery lignins condense under acid condition, rendering their subsequent depolymerization challenging, and hence limiting subsequent functionalization for specialty chemicals (76).…”

Section: Chemical Propertiesmentioning

confidence: 99%

“…A review of the use of 31 P NMR as an analytical tool for lignin is available (41). High resolution 13 C NMR has played a primary role and two-and three-dimensional methods have been developed as powerful tools to identify fine structure. Heteronuclear multiple-bond correlation (HMBC) experiments correlate proton and carbon atoms that are removed by up to three bonds, providing previously unimagined information about connectivity within the lignin structure.…”

Section: Characterization Of Lignin Lignin Is Characterized In the Smentioning

confidence: 99%

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Lignin

Gargulak¹,

Lebo²,

McNally³

2015

Kirk-Othmer Encyclopedia of Chemical Technology

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The word lignin is derived from the Latin word lignum meaning wood. It is one of the main components of all vascular plants and the second most abundant polymer in nature. This article describes the current understanding of the structure of this complex natural polymer. The number and types of different chemical bonds present in lignin are discussed, as are the ways in which different lignins are identified and their distributions determined in plant tissues. Means for isolating lignin from wood are described, and the chemical and physical properties of the resulting lignins are reviewed. The various chemical and instrumental methods for characterizing isolated lignins are also discussed. The article concludes with a review of commercial lignin products including a discussion of producers, production methods, modification reactions, and the many industries in which lignins are used.

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Gaschromatographische Analyse von Ligninoxydationsprodukten. VIII. Zur Struktur des Lignins der Fichte.

Cited by 107 publications

References 0 publications

Preparation and microbial decomposition of synthetic [14C]ligins.

Preparation and microbial decomposition of synthetic [14C]ligins.

Biomass valorisation by staged degasification

Lignin

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