منابع مشابه
Structural differences in lignin between Eucalyptus clones determined by analytical pyrolysis-gas chromatography/mass spectrometry
In this study, a large number of wood samples from several species of Eucalyptus, including E. grandis, E. urophylla, E. globulus, E. dunnii, E. camaldulensis and their crossing were characterized by pyrolysis-GC/MS method. All the measurements were done directly from the Eucalypus wood samples. S/G ratios were calculated for all guaiacyl and syringyl lignin pyrolysis derivatives. The results w...
متن کاملIdentifying acetylated lignin units in non-wood fibers using pyrolysis-gas chromatography/mass spectrometry.
A series of non-wood plant fibers, namely kenaf, jute, sisal and abaca, have been analyzed upon pyrolysis-gas chromatography/mass spectrometry (Py-GC/MS) of the whole material. The pyrolysis products mainly arise from the carbohydrate and lignin moieties of the fibers. The lignin-derived phenols belonged to the p-hydroxyphenylpropanoid (H), guaiacylpropanoid (G) and syringylpropanoid (S) struct...
متن کاملPaints and Coatings: Pyrolysis: Gas Chromatography
In this review, the principles behind, and the utility of, fractionation of subcellular organelles by centrifugal techniques have been explored. Common methods used, and a review of the advantages and disadvantages of certain experimental tools (centrifuges, rotors, and aqueous media used for fractionation) were also reviewed and tables and graphs useful for designing protocols were also provided.
متن کاملCharacterization of kenaf (Hibiscus cannabinus) lignin by pyrolysis-gas chromatography-mass spectrometry in the presence of tetramethylammonium hydroxide
Pyrolysis-gas chromatography-mass spectrometry (Py-GC-MS) in the presence of tetramethylammonium hydroxide (TMAH) was applied to kenaf (Hibiscus cannabinus) fibers in order to clarify the chemical composition of in situ lignin. The core and bast samples obtained from the middle position of variety Chinpi-3 were pyrolyzed at 500 °C for 4 s with TMAH. The core pyrogram revealed peaks retaining th...
متن کاملApplication of Pyrolysis Gas Chromatography in Forensic Science.
In this review the range of evidentiary materials that may be successfully examined by pyrolysis gas chromatography is emphasized. Initial sections briefly discuss the main types of commercially available pyrolyzers, i.e., inductively heated devices (Curie point), those employing resistive heating, and furnace pyrolyzers. Sample introduction methods and the effects of various pyrolysis paramete...
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ژورنال
عنوان ژورنال: Journal of the Society of Materials Science, Japan
سال: 1967
ISSN: 1880-7488,0514-5163
DOI: 10.2472/jsms.16.844