期刊
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
卷 55, 期 4, 页码 1327-1336出版社
AMER CHEMICAL SOC
DOI: 10.1021/jf062677x
关键词
curaua; Ananas erectifolius; lipids; lignin; pyrolysis; hydroxy monoesters; glyceryl esters; paper pulp
The chemical composition of leaf fibers of curaua (Ananas erectifolius), an herbaceous plant native of Amazonia, was studied. Special attention was paid to the content and composition of lignin and lipophilic compounds. The analysis of lignin in the curaua fibers was performed in situ by pyrolysis-gas chromatography/mass spectrometry (Py-GC/MS) and showed a lignin composition with a p-hydroxyphenyl:guaiacyl:syringyl units (H:G:S) molar proportion of 30:29:41 (S/G molar ratio of 1.4). The presence of p-hydroxycinnamic acids (p-coumaric and ferulic acids) in curaua fibers was revealed upon pyrolysis in the presence of tetramethylammonium hydroxide. On the other hand, the main lipophilic compounds, analyzed by GC/MS, were series of long-chain n-fatty acids, n-fatty alcohols, alpha- and omega-hydroxyacids, monoglycerides, sterols, and waxes. Other compounds, such as omega-hydroxy monoesters and omega-hydroxy acylesters of glycerol, were also found in this fiber in high amounts.
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