The effect of fungal decay (Agaricus bisporus) on wheat straw lignin using pyrolysis–GC–MS in the presence of tetramethylammonium hydroxide (TMAH)

Vane, Christopher H.; Abbott, Geoffrey D.; Head, Ian M.

doi:10.1016/s0165-2370(00)00156-x

Cited by 58 publications

(47 citation statements)

References 32 publications

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“…It has already been reported that the degree of oxidation is higher with methanol as solvent for TMAH [7], but under the scope of G11 being derived from a Cannizzaro-type reaction of G9 [21] it also implies that a promotion of this disproportionation reaction occurs by application of methanol. This observation could be useful to take into account, if results of different authors are to be compared, as the methylated benzoic acids are in the centre of interest for studies on humic matter [13,19,22] and fungal decay on lignocellulosics [23,24].…”

Section: Resultsmentioning

confidence: 99%

Influence of parameters on pyrolysis-GC/MS of lignin in the presence of tetramethylammonium hydroxide

Klingberg¹,

Odermatt²,

Meier³

2005

Journal of Analytical and Applied Pyrolysis

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Section: Resultsmentioning

confidence: 99%

Influence of parameters on pyrolysis-GC/MS of lignin in the presence of tetramethylammonium hydroxide

Klingberg¹,

Odermatt²,

Meier³

2005

Journal of Analytical and Applied Pyrolysis

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“…Spikerush was characterized by a high abundance of vicinal trimethoxybenzene derivatives such as 3,4,5-trimethoxybenzoic acid methyl ester, and 3-(3,4,5-trimethoxyphenyl)-2-propenoic acid methyl ester. One such derivative, 3,4,5-trimethoxybenzoic acid methyl ester is reported to be derived from galoylated condensed tannins (Garnier et al 2003) or from lignin-degradation products (del Rio et al 1998;Vane et al 2001). Periphyton was characterized by a high abundance of benzene, 1,4-dimethoxy-and 1,2,4-trimethoxybenzene, the sum of which exceeded more than half of total phenolic compounds released by TMAH thermochemolysis.…”

Section: Tmah Thermochemolysis Of Udommentioning

confidence: 99%

Quantitative and Qualitative Aspects of Dissolved Organic Carbon Leached from Senescent Plants in an Oligotrophic Wetland

et al. 2006

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We conducted a series of experiments whereby dissolved organic matter (DOM) was leached from various wetland and estuarine plants, namely sawgrass (Cladium jamaicense), spikerush (Eleocharis cellulosa), red mangrove (Rhizophora mangle), cattail (Typha domingensis), periphyton (dry and wet mat), and a seagrass (turtle grass; Thalassia testudinum). All are abundant in the Florida Coastal Everglades (FCE) except for cattail, but this species has a potential to proliferate in this environment. Senescent plant samples were immersed into ultrapure water with and without addition of 0.1% NaN 3 (w/ and w/o NaN 3 , respectively) for 36 days. We replaced the water every 3 days. The amount of dissolved organic carbon (DOC), sugars, and phenols in the leachates were analyzed. The contribution of plant leachates to the ultrafiltered high molecular weight fraction of DOM (>1 kDa; UDOM) in natural waters in the FCE was also investigated. UDOM in plant leachates was obtained by tangential flow ultrafiltration and its carbon and phenolic compound compositions were analyzed using solid state 13 C cross-polarization magic angle spinning nuclear magnetic resonance ( 13 C CPMAS NMR) spectroscopy and thermochemolysis in the presence of tetramethylammonium hydroxide (TMAH thermochemolysis), respectively. The maximum yield of DOC leached from plants over the 36-day incubations ranged from 13.0 to 55.2 g C kg À1 dry weight. This amount was lower in w/o NaN 3 treatments (more DOC was consumed by microbes than produced) except for periphyton. During the first 2 weeks of the 5 week incubation period, 60-85% of the total amount of DOC was leached, and exponential decay models fit the leaching rates except for periphyton w/o NaN 3 . Leached DOC (w/ NaN 3 ) contained different concentrations of sugars and phenols depending on the plant types (1.09-7.22 and 0.38-12.4 g C kg À1 dry weight, respectively), and those biomolecules comprised 8-34% and 4-28% of the total DOC, respectively. This result shows that polyphenols that readily leach from senescent plants can be an important source of chromophoric DOM (CDOM) in wetland environments. The O-alkyl C was found to be the major C form (55 ± 9%) of UDOM in plant leachates as determined by 13 C CPMAS NMR. The relative abundance of alkyl C and carbonyl C was consistently lower in plant-leached UDOM than that in natural water UDOM in the FCE, which suggests that these constituents increase in relative abundance during diagenetic processing. TMAH thermochemolysis analysis revealed that the phenolic composition was different among the UDOM leached from different plants, and was expected to serve as a source indicator of UDOM in natural water.Polyphenols are, however, very reactive and photosensitive in aquatic environments, and thus may loose their plant-specific molecular characteristics shortly. Our study suggests that variations in vegetative cover across a wetland landscape will affect the quantity and quality of DOM leached into the water, and such differences in DOM characteristics may affect other...

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“…The processes of degradation by P. ostreatus are typical of those exhibited by white rot fungi in general [5]. White rot decay has been characterised in previous studies using TMAH thermochemolysis [6,10], FTIR [7], gravimetric analysis [8], and NMR spectroscopy [9]. White rot fungi are also known to break down all structural cell wall constituents, although the rate at which they do this differs.…”

Section: Introductionmentioning

confidence: 99%

Coupling of thermal analysis with quadrupole mass spectrometry and isotope ratio mass spectrometry for simultaneous determination of evolved gases and their carbon isotopic composition

López-Capél

Abbott

Thomas

et al. 2006

Journal of Analytical and Applied Pyrolysis

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The effect of fungal decay (Agaricus bisporus) on wheat straw lignin using pyrolysis–GC–MS in the presence of tetramethylammonium hydroxide (TMAH)

Cited by 58 publications

References 32 publications

Influence of parameters on pyrolysis-GC/MS of lignin in the presence of tetramethylammonium hydroxide

Influence of parameters on pyrolysis-GC/MS of lignin in the presence of tetramethylammonium hydroxide

Quantitative and Qualitative Aspects of Dissolved Organic Carbon Leached from Senescent Plants in an Oligotrophic Wetland

Coupling of thermal analysis with quadrupole mass spectrometry and isotope ratio mass spectrometry for simultaneous determination of evolved gases and their carbon isotopic composition

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