Chemical characterization by pyrolysis/gas chromatography/mass spectrometry of acid-precipitable polymeric lignin (APPL) from wheat straw transformed by selected streptomyces strains

Rodríguez, Jhon James Mora; Hernández-Coronado, M. J.; Hernández, Manuel; Bocchini, Paola; Galletti, Guido C.; Arias, Mauricio

doi:10.1016/s0003-2670(97)00079-2

Cited by 19 publications

(12 citation statements)

References 23 publications

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“…In contrast, high proportions of alkenyl phenols but no carbonyl-containing phenols were reported from slow pyrolysis under nitrogen of wood from Salix, birch and spruce species [10]. A pyrolysis study of wheat straw lignin [11] reported low proportions of carbonyl compounds like vanillin. The major phenol was GuCH=CH z , which was also the most prominent methoxyphenol from grass in our study.…”

Section: Sampling Methods and Combustion Conditionsmentioning

confidence: 94%

Methoxyphenols from burning of Scandinavian forest plant materials

2000

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Semivolatile compounds in smoke from gram-scale incomplete burning of plant materials were assessed by gas chromatography and mass spectrometry. Gas syringe sampling was shown to be adequate by comparison with adsorbent sampling. Methoxyphenols as well as 1,6-anhydroglucose were released in amounts as large as 10 mg/kg of dry biomass at 90 % combustion efficiency.Wood, twigs, bark and needles from the conifers Norway spruce and Scots pine emitted twelve reported 2-methoxyphenols in similar proportions. Grass, heather and birchwood released the same 2-methoxyphenols but also the corresponding 2,6-dimethoxyphenols which are characteristic of angiosperms. The, methoxyphenols are formed from lignin and 4iffer in structure by the group in para position relative to the phenolic OH group. Prominent phenols were those with trans-1-propenyl and ethenyl groups in that position. Vanillin, 4-hydroxy-3-methoxybenzaldehyde, was a prominent carbonyl compound from the conifer materials.

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Section: Sampling Methods and Combustion Conditionsmentioning

confidence: 94%

Methoxyphenols from burning of Scandinavian forest plant materials

2000

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“…Identification of chromatographic peaks from pyrolysis GC/ MS experiments was carried out by comparing the mass ions (m/z) of each peak with NIST mass spectral database and literature data of pyrolysis products from lignocellulosic materials [19][20][21][22][23][24][25][26][27][28][29][30]. Four experimental runs were performed per sample and the averaged values were used for analysis.…”

Section: Pyrolysis Gc/msmentioning

confidence: 99%

Fast pyrolysis of cassava rhizome in the presence of catalysts

Pattiya

Titiloye

Bridgwater

2008

Journal of Analytical and Applied Pyrolysis

290

180

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“…An increase in this ratio was observed in all treated woods compared with sound wood as correspond to microorganisms that produce a preferential degradation of carbohydrates and less condensed lignin units [12]. The resistance to biodegradation observed in the pine wood could be explained by the higher condensation degree of G units in the wood matrix compared with S units [17].…”

Section: Resultsmentioning

confidence: 99%

“…Analytical pyrolysis in combination with gas chromatography and mass spectrometry (Py-GC/MS) have been used to characterize a wide set of polymers, additives and impurities contained in different types of wood and grass residues [9][10][11][12][13][14][15]. This technique proved to be also useful to characterize the modifications occurred in the main constituents of wood along the biopulping process with different fungal strains [16,17].…”

Section: Introductionmentioning

confidence: 99%

Effect of different Streptomyces strains on pine wood as seen by Py–GC/MS

Arias¹,

Polvillo²,

Rodríguez³

et al. 2005

Journal of Analytical and Applied Pyrolysis

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Pyrolysis/gas chromatography/mass spectrometry was used to elucidate the ability of streptomycetes to modify pine wood under solidstate fermentation. The pyrograms of sound and decayed wood showed the typical pyrolysis products derived from carbohydrates and lignin. In general, the relative abundance of the former was lower in treated woods than in sound wood. Several major peaks released from guaiacyl units of lignin were also revealed. Although some differences could be observed in the relative abundance of the released guaiacyl units from lignin between sound and treated woods, a clear decrease in the lignin-derived products by the action of the microorganisms was not observed. Nevertheless, an increase in the relative abundance of the most of guaiacyl units with a higher oxidation degree was mainly detected in woods treated by the strains Streptomyces UAH 7, Streptomyces anulatus, Streptomyces UAH 48, Streptomyces avermitilis and Streptomyces badius. These results suggest an oxidative action of these strains on the lignin of pine wood, which was corroborated by a decrease in the (aldehyde/ ketone + acid) ratio. In addition, the breakdown of the alkyl chain linkages by the strain Streptomyces UAH 7 could be also observed. Analytical pyrolysis allow to demonstrate for first time the oxidative attack of selected Streptomyces strains on lignin moiety of pine wood, which is an important requirement for biomechanical pulping purposes. #

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Chemical characterization by pyrolysis/gas chromatography/mass spectrometry of acid-precipitable polymeric lignin (APPL) from wheat straw transformed by selected streptomyces strains

Cited by 19 publications

References 23 publications

Methoxyphenols from burning of Scandinavian forest plant materials

Methoxyphenols from burning of Scandinavian forest plant materials

Fast pyrolysis of cassava rhizome in the presence of catalysts

Effect of different Streptomyces strains on pine wood as seen by Py–GC/MS

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