Carbon-13 CP/MAS solid-state NMR and FT-IR spectroscopy of wood cell wall biodegradation

Gilardi, Gianfranco; Abis, Luigi; Cass, Anthony E. G.

doi:10.1016/0141-0229(94)00019-n

Cited by 95 publications

(54 citation statements)

References 27 publications

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“…Cross-polarization (CP) magic angle spinning (MAS) 13 C NMR spectra of the samples were obtained with a Varian Inova 300 spectrometer operating at 75.3 MHz under the following conditions (Gilardi et al 1995), according to the method described in Osono et al (2014). The pulse repetition time was 3.2 sec, the CP contact time was 1.5 min, the sweep width was 50 kHz, and the acquisition time was 40 min.…”

Section: Nmr Analysismentioning

confidence: 99%

Application of 13C NMR spectroscopy to characterize organic chemical components of decomposing coarse woody debris from different climatic regions

et al. 2015

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. Application of 13 C NMR spectroscopy to characterize organic chemical components of decomposing coarse woody debris from different climatic regions. Ann. For. Res. 58(1): 3-13.Abstract. Solid-state 13 C nuclear magnetic resonance (NMR) spectroscopy was applied to coarse woody debris (CWD) in different stages of decomposition and collected from forest floor of a subtropical, a cool temperate, and a subalpine forest in Japan. The purpose was to test its applicability to characterize organic chemical composition of CWD of broad-leaved and coniferous trees from different climatic conditions. O-alkyl-C, mainly representing carbohydrates, was the predominant component of CWD at the three sites, accounting for 43.5-58.1% of the NMR spectra. Generally, the relative area under the signals for aromatic-C and phenolic-C, mainly representing lignin, increased, whereas the relative area for O-alkyl-C decreased, as the decay class advanced. The relative area under NMR chemical shift regions was significantly correlated with the chemical properties examined with proximate analyses. That is, O-alkyl-C and di-O-alkyl-C NMR signal areas were positively correlated with the volumetric density of CWD and the content of total carbohydrates. Methoxyl-C, aromatic-C, phenolic-C, carboxyl-C, and carbonyl-C were positively correlated with the contents of acid-unhydrolyzable residues (lignin, tannins, and cutin) and nitrogen. Lignin-C calculated from NMR signals increased, and polysaccharide-C decreased, with the decay class of CWD at the three study sites. A review of previous studies on 13 C NMR spectroscopy for decomposing CWD suggested further needs of its application to broad-leaved trees from tropical and subtropical regions.

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Section: Nmr Analysismentioning

confidence: 99%

Application of 13C NMR spectroscopy to characterize organic chemical components of decomposing coarse woody debris from different climatic regions

et al. 2015

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“…The scans were collected between 4 and 10 K. For char samples HPdec (single pulse with high-power decoupling) was used in some instances due to low amount of protons. Decoupling power was 55 KHz; between 500 and 2000 scans were collected with recycling time of 40 s. The spectra were plotted between −15 and 265 ppm, and the peaks in the spectrum were assigned to acetyl-CH 3 in hemicellulose (21 ppm), methoxyl-CH 3 in lignin (56 ppm), C1-C6 carbon in carbohydrates (63, 73, 89, and 105 ppm), sugars in hemicelullose (82 ppm), aromatic carbon atoms (127 to 167 ppm), esters and carboxylic acids (169 to 195 ppm) including acetyl groups in hemicellulose at 173 ppm [56].…”

Section: Leachate Chemistrymentioning

confidence: 99%

Dynamics in leachate chemistry of Cu-Au tailings in response to biochar and woodchip amendments: a column leaching study

You

Huang

et al. 2013

Environ Sci Eur

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Background: Phytostabilization has been advocated as a promising approach to reduce mine tailings' adverse effects to surrounding environment. With many years of efforts in both laboratory and field trials, organic amendments are found to be essential in tailing revegetation. Yet, the associate geochemical dynamics caused by different amendments has rarely been examined. As reactive minerals are usually rich in tailings, geochemical changes induced by amendments would influence seepage management and revegetation strategies. The present study aimed to investigate geochemical dynamics in Cu-Au tailing leachate, in response to amendments with biochar produced from hardwood timber at high charring temperature or woodchips of mixed native tree species in a column leaching experiment under laboratory conditions. Results: Results showed that the Cu-Au tailings tested in this study were relatively stable after natural weathering, with little resilience of peak salinity, stable pH and low levels of metals in leachate against the six cycles of leaching over 20 weeks. In comparison with the control without any amendments, biochar treatment did not cause any substantial changes in most examined properties of leachate, except for the reduction in dissolved organic C and NO 2

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“…The resulting normalized 13 C CP/MAS NMR spectra are depicted in Fig. 1 (Almendros et al 1992;Gilardi et al 1995;Sun et al 2005;Zimbardi et al 1999). As can be seen, all of the acquired spectra were comprised mainly of chemical resonance values analogous to the carbohydrate region (60 to 100 ppm) and aromatic region (100 to 162 ppm).…”

Section: Structure Decomposition Analysis Of Biopretreated Corn Stovermentioning

confidence: 99%

Medium-Temperature Pyrolysis of Corn Stover Improved by Biopretreatment with White-rot Fungi

Yang¹,

Laskar²,

Ma³

et al. 2013

BioResources

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This work investigated the ability of biopretreatment with different whiterot fungi to improve the medium-temperature pyrolysis of biomass. It was found that biopretreatment can significantly increase the production of phenols and glucopyranoside up to 2.82 and 2.94 fold, respectively. Biopretreatment can also decrease the content of carbon dioxide, propanol, and propanone, making the pyrolysis more efficient and product-oriented. Moreover, distinct bio-deconstruction mechanisms can result in different pyrolysis products. By deconstructing cellulose and modifying lignin with a minimum of demethoxyation, white-rot fungus Irpex lacteus CD2 can improve the production of acetaldehyde (up to 6.72%) and methoxyl substitutes such as dimethoxyphenyl (up to 21.59 folds). By decomposing carbohydrates, carbonxyl, and methoxyl groups, white-rot fungi Pleurotus ostreatus BP2 and Echinodontium taxodii 2538 can increase the production of D-allose (up to 3.09%) and formic acid (up to 6.98%), while decreasing the methoxyl substitutes such as 2-methoxy-4-vinylphenol (up to 70.08%).

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Carbon-13 CP/MAS solid-state NMR and FT-IR spectroscopy of wood cell wall biodegradation

Cited by 95 publications

References 27 publications

Application of 13C NMR spectroscopy to characterize organic chemical components of decomposing coarse woody debris from different climatic regions

Application of 13C NMR spectroscopy to characterize organic chemical components of decomposing coarse woody debris from different climatic regions

Dynamics in leachate chemistry of Cu-Au tailings in response to biochar and woodchip amendments: a column leaching study

Medium-Temperature Pyrolysis of Corn Stover Improved by Biopretreatment with White-rot Fungi

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