Lipids of soil humic acids. I. The hymatomelanic acid fraction
Gas chromatography and gas chromatography-mass spectrometry have been used for the analysis of the hymatomelanic acids of four soil samples (a Typic Xerorthent, a Typic Rendoll and two Typic Xerochrepts, on shale and on granite) encompassing a wide diversity of properties in terms of pH, organic carbon, nitrogen content and associated vegetation. These humic fractions are largely composed of distributions of C12-C34 fatty acids where microbial and higher plant contributions may be observed. Mixtures of C27-C29 stera-3,5-dien-7-ones are also present, representing microbial oxidation products of Δ2-sterols. Despite the wide diversity of soils considered no major qualitative differences have been observed. In all cases the corresponding hymatomelanic acids are composed of a rather uniform pattern of aerobic microbial components together with higher plant lipids.
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1989
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dig-irnas-es-10261-648862020-07-03T12:19:44Z Lipids of soil humic acids. I. The hymatomelanic acid fraction Grimalt, Joan O. Sáiz-Jiménez, Cesáreo Gas chromatography and gas chromatography-mass spectrometry have been used for the analysis of the hymatomelanic acids of four soil samples (a Typic Xerorthent, a Typic Rendoll and two Typic Xerochrepts, on shale and on granite) encompassing a wide diversity of properties in terms of pH, organic carbon, nitrogen content and associated vegetation. These humic fractions are largely composed of distributions of C12-C34 fatty acids where microbial and higher plant contributions may be observed. Mixtures of C27-C29 stera-3,5-dien-7-ones are also present, representing microbial oxidation products of Δ2-sterols. Despite the wide diversity of soils considered no major qualitative differences have been observed. In all cases the corresponding hymatomelanic acids are composed of a rather uniform pattern of aerobic microbial components together with higher plant lipids. Peer Reviewed 2013-01-23T15:48:48Z 2013-01-23T15:48:48Z 1989 2013-01-23T15:48:48Z artículo http://purl.org/coar/resource_type/c_6501 doi: 10.1016/0048-9697(89)90149-6 issn: 0048-9697 e-issn: 1879-1026 Science of the Total Environment 81-82: 409-420 (1989) http://hdl.handle.net/10261/64886 10.1016/0048-9697(89)90149-6 en none Elsevier |
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Gas chromatography and gas chromatography-mass spectrometry have been used for the analysis of the hymatomelanic acids of four soil samples (a Typic Xerorthent, a Typic Rendoll and two Typic Xerochrepts, on shale and on granite) encompassing a wide diversity of properties in terms of pH, organic carbon, nitrogen content and associated vegetation. These humic fractions are largely composed of distributions of C12-C34 fatty acids where microbial and higher plant contributions may be observed. Mixtures of C27-C29 stera-3,5-dien-7-ones are also present, representing microbial oxidation products of Δ2-sterols. Despite the wide diversity of soils considered no major qualitative differences have been observed. In all cases the corresponding hymatomelanic acids are composed of a rather uniform pattern of aerobic microbial components together with higher plant lipids. |
format |
artículo |
author |
Grimalt, Joan O. Sáiz-Jiménez, Cesáreo |
spellingShingle |
Grimalt, Joan O. Sáiz-Jiménez, Cesáreo Lipids of soil humic acids. I. The hymatomelanic acid fraction |
author_facet |
Grimalt, Joan O. Sáiz-Jiménez, Cesáreo |
author_sort |
Grimalt, Joan O. |
title |
Lipids of soil humic acids. I. The hymatomelanic acid fraction |
title_short |
Lipids of soil humic acids. I. The hymatomelanic acid fraction |
title_full |
Lipids of soil humic acids. I. The hymatomelanic acid fraction |
title_fullStr |
Lipids of soil humic acids. I. The hymatomelanic acid fraction |
title_full_unstemmed |
Lipids of soil humic acids. I. The hymatomelanic acid fraction |
title_sort |
lipids of soil humic acids. i. the hymatomelanic acid fraction |
publisher |
Elsevier |
publishDate |
1989 |
url |
http://hdl.handle.net/10261/64886 |
work_keys_str_mv |
AT grimaltjoano lipidsofsoilhumicacidsithehymatomelanicacidfraction AT saizjimenezcesareo lipidsofsoilhumicacidsithehymatomelanicacidfraction |
_version_ |
1777664524342525952 |