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Comparison of vitrified and unvitrified Eocene woody tissues by TMAH thermochemolysis - implications for the early stages of the formation of vitrinite.

Kaelin PE, Huggett WW, Anderson KB - Geochem. Trans. (2006)

Bottom Line: Samples of vitrified and unvitrified Eocene woody plant tissues collected from the Fossil Forest site, Geodetic Hills, Axel Heiberg Island, have been characterized by TMAH thermochemolysis.All samples are gymnosperm-derived, are of very low maturity and all share the same post-depositional geologic history.Differences in the distributions of products observed from vitrified and unvitrified samples suggest that vitrification of woody tissue is associated with modification of the lignin C3 side chain, following loss of all or most of the carbohydrate present in the precursor woody tissues.

View Article: PubMed Central - HTML - PubMed

Affiliation: Department of Geology, Southern Illinois University Carbondale, Carbondale, IL 62901, USA. kaelin@siu.edu

ABSTRACT
Samples of vitrified and unvitrified Eocene woody plant tissues collected from the Fossil Forest site, Geodetic Hills, Axel Heiberg Island, have been characterized by TMAH thermochemolysis. All samples are gymnosperm-derived, are of very low maturity and all share the same post-depositional geologic history. Differences in the distributions of products observed from vitrified and unvitrified samples suggest that vitrification of woody tissue is associated with modification of the lignin C3 side chain, following loss of all or most of the carbohydrate present in the precursor woody tissues. The key driver of vitrification appears to be physical compression of the tissue following biological removal of cellulosic materials.

No MeSH data available.


Comparison of distributions of lignin-derived analytes from thermochemolysis of vitrified root and branch and unvitrified branch tissues. Bars are mean values, plotted as a percentage of the total abundance of all lignin-derived products. Error bars represent one standard deviation (n = 4).
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Figure 7: Comparison of distributions of lignin-derived analytes from thermochemolysis of vitrified root and branch and unvitrified branch tissues. Bars are mean values, plotted as a percentage of the total abundance of all lignin-derived products. Error bars represent one standard deviation (n = 4).

Mentions: Py-GC-MS data from vitrified (root and branch) and unvitrified (branch) tissues are illustrated in Figure 6. Supplemental data supporting the assignments given are available in Additional File 2. Quantitative results comparing data from multiple analyses are shown in Figure 7. To facilitate comparison of multiple samples, data in Figure 7 are normalized to the total abundance of lignin-derived products, and the abundances of products differing only in degree of methylation are summed (e.g. 3 = 3A+3B). Numbering of analytes identified in Figures 6 and 7 is the same as used in Figure 4 and illustrated in Figure 5.


Comparison of vitrified and unvitrified Eocene woody tissues by TMAH thermochemolysis - implications for the early stages of the formation of vitrinite.

Kaelin PE, Huggett WW, Anderson KB - Geochem. Trans. (2006)

Comparison of distributions of lignin-derived analytes from thermochemolysis of vitrified root and branch and unvitrified branch tissues. Bars are mean values, plotted as a percentage of the total abundance of all lignin-derived products. Error bars represent one standard deviation (n = 4).
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC1622741&req=5

Figure 7: Comparison of distributions of lignin-derived analytes from thermochemolysis of vitrified root and branch and unvitrified branch tissues. Bars are mean values, plotted as a percentage of the total abundance of all lignin-derived products. Error bars represent one standard deviation (n = 4).
Mentions: Py-GC-MS data from vitrified (root and branch) and unvitrified (branch) tissues are illustrated in Figure 6. Supplemental data supporting the assignments given are available in Additional File 2. Quantitative results comparing data from multiple analyses are shown in Figure 7. To facilitate comparison of multiple samples, data in Figure 7 are normalized to the total abundance of lignin-derived products, and the abundances of products differing only in degree of methylation are summed (e.g. 3 = 3A+3B). Numbering of analytes identified in Figures 6 and 7 is the same as used in Figure 4 and illustrated in Figure 5.

Bottom Line: Samples of vitrified and unvitrified Eocene woody plant tissues collected from the Fossil Forest site, Geodetic Hills, Axel Heiberg Island, have been characterized by TMAH thermochemolysis.All samples are gymnosperm-derived, are of very low maturity and all share the same post-depositional geologic history.Differences in the distributions of products observed from vitrified and unvitrified samples suggest that vitrification of woody tissue is associated with modification of the lignin C3 side chain, following loss of all or most of the carbohydrate present in the precursor woody tissues.

View Article: PubMed Central - HTML - PubMed

Affiliation: Department of Geology, Southern Illinois University Carbondale, Carbondale, IL 62901, USA. kaelin@siu.edu

ABSTRACT
Samples of vitrified and unvitrified Eocene woody plant tissues collected from the Fossil Forest site, Geodetic Hills, Axel Heiberg Island, have been characterized by TMAH thermochemolysis. All samples are gymnosperm-derived, are of very low maturity and all share the same post-depositional geologic history. Differences in the distributions of products observed from vitrified and unvitrified samples suggest that vitrification of woody tissue is associated with modification of the lignin C3 side chain, following loss of all or most of the carbohydrate present in the precursor woody tissues. The key driver of vitrification appears to be physical compression of the tissue following biological removal of cellulosic materials.

No MeSH data available.