Tannin Composition of<i>Eucalyptus camaldulensis, E. globulus</i>and<i>E. rudis.</i>Part II. Bark

Cadahía, Estrella; Conde, E.; Simón, Brígida Fernández de; García‐Vallejo, M. C.

doi:10.1515/hfsg.1997.51.2.125

Cited by 36 publications

(29 citation statements)

References 8 publications

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“…As lignin is slightly soluble in DMSO, we dissolved the methanolic extract in (CD 3 ) 2 CO, filtered the mixture and recorded the 13 C-NMR spectrum of the resulting solution (Fig. 5).…”

Section: Resultsmentioning

confidence: 99%

“…6). In order to characterize whether fisetinidol or robinetinidol or both monomeric units are present in the extract B, the reported characteristic 13 C-NMR chemical shifts for B-ring oxidation patterns 4,15 were used to further analyze Fig. 5.…”

Section: Resultsmentioning

confidence: 99%

“…Solid state 13 C-NMR spectra were recorded on a BRUKER DRX spectrometer operating at a frequency of 100.6 MHz using the pulse sequence VACP, pulse delay 0.5 s, acquisition time 25 ms, rotor speed 4000 rpm, and 1520 scans were collected. Liquid 13 C-NMR spectra were recorded at the same frequency using DMSO-d 6 as solvent and pulse sequence ZGPG30, power gated and angle of 30°a t the principal pulse; pulse delay was 1.0 s and 10240 scans were collected.…”

Section: Nmr Measurementsmentioning

confidence: 99%

“…This wood also contains a large amount of polyphenols 2 . Article e-mail: salemos@ufu.br Polyphenol studies were carried out using classical chemical techniques [3][4][5][6][7] associated with modern high performance liquid chromatography (HPLC) [8][9][10][11][12][13] and high resolution liquid and solid state 13 C-NMR 11,14,15 and FTIR spectroscopies.…”

Section: Introductionmentioning

confidence: 99%

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Studies on polyphenols and lignin of Astronium urundeuva wood

Morais¹,

Nascimento²,

Queiroz³

et al. 1999

J. Braz. Chem. Soc.

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Uma amostra da madeira de aroeira preta (Astronium urundeuva) moída em moinho de bolas foi extraída, sucessivamente, com benzeno, benzeno:etanol (2:1, vv -1 ), clorofórmio e água num soxhlet. A madeira extraída foi secada ao ar livre resultando o resíduo A que, em seguida, foi extraído com acetona:água (9:1, vv -1 ), também num soxhlet. Do extrato resultante foi obtida a lignina de madeira moída (MWL). Não considerando a MWL, a soma de todos os extratos alcançou 18,19% da madeira seca. O conteúdo em lignina de Klason de A e o conteúdo de grupos metoxila da MWL foram 23,84% e 19,00%, respectivamente. Outra amostra de A apresentou conteúdos em polissacarídeos de difícil e fácil hidrólise de 34,86% e 18,81%, respectivamente. Uma Segunda amostra de madeira moída foi submetida a uma extração única com metanol, à temperatura ambiente, fornecendo o extrato metanólico B (23,85% da madeira seca). Espectros de RMN do

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“…As lignin is slightly soluble in DMSO, we dissolved the methanolic extract in (CD 3 ) 2 CO, filtered the mixture and recorded the 13 C-NMR spectrum of the resulting solution (Fig. 5).…”

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Nmr Measurementsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Studies on polyphenols and lignin of Astronium urundeuva wood

Morais¹,

Nascimento²,

Queiroz³

et al. 1999

J. Braz. Chem. Soc.

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show abstract

“…Further samples of ground sapwood used in the petri dish bioassays were taken, and approximately equal amounts of the coarse (1.004 ± 1.0 Â 10 À3 g) and fine (1.004 ± 1.3 Â 10 À3 g) samples were mixed together and extracted in dichloromehane (Ajax, 10 mL) for 48 h in the dark at 4°C (after Cadahia et al, 1997;Eyles et al, 2003;Hayes et al, 2014). Samples were stored in the freezer until analysis.…”

Section: Chemical Propertiesmentioning

confidence: 99%

Performance of Sirex noctilio ’s biocontrol agent Deladenus siricidicola , in known and predicted hosts

et al. 2016

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Biotreatment of tannin-rich beer-factory wastewater with white-rot basidiomyceteCoriolopsis gallica monitored by pyrolysis/gas chromatography/mass spectrometry

Lucas

Terrón²,

González

et al. 2000

Rapid Commun. Mass Spectrom.

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Some fractions of beer-factory wastewaters represent an important environmental concern owing to their high content of polyphenols and dark-brown color. The capacity of Coriolopsis gallica to preferentially degrade lignin has been successfully applied in our laboratory to the biotreatment and decolorization of paper-industry effluents. In this work, the ability of this white-rot fungus to degrade high-tannin-containing wastewaters is evaluated. Under all the conditions studied, effluent decolorization and chemical oxygen demand reduction achieved by C. gallica at day 12 of incubation were close to 50 and 65%, respectively. No adhesion of dark color to the fungal mycelium was observed suggesting that decolorization could be ascribed to C. gallica degradation systems. Mycelium dry-weight values showed that C. gallica is tolerant to relatively high tannin content present in the effluent samples. In the sample containing the highest effluent concentration (60% v/v), dry-weight values suggested an inhibition of fungal growth at day 6 of incubation and a further adaptation of the fungus to the stressing tannin effect at day 12 of fungal treatment. Pyrolysis/gas chromatography/mass spectrometry results showed a decrease of polyphenols pyrolysis products, mainly phenol and guaiacol, with the incubation time. All these results indicate the potential use of C. gallica in bioremediation of tannin-containing industrial wastewaters and in other applications where a reduction in polyphenols content is required.

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Tannin Composition ofEucalyptus camaldulensis, E. globulusandE. rudis.Part II. Bark

Cited by 36 publications

References 8 publications

Studies on polyphenols and lignin of Astronium urundeuva wood

Studies on polyphenols and lignin of Astronium urundeuva wood

Performance of Sirex noctilio ’s biocontrol agent Deladenus siricidicola , in known and predicted hosts

Biotreatment of tannin-rich beer-factory wastewater with white-rot basidiomyceteCoriolopsis gallica monitored by pyrolysis/gas chromatography/mass spectrometry

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