2016
DOI: 10.1016/j.quaint.2015.11.057
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Fossil redox-conditions influence organic matter composition in loess paleosols

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Cited by 9 publications
(9 citation statements)
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“…Meanwhile, chain-length shortening in the fine POM fraction suggested a stronger decomposition of n-alkanes and n-alkenes than in both coarse POM and MAOM fractions [76]. In addition, we highlight large contributions from N-containing compounds and polysaccharide compounds in MAOM fraction, representing a microbial source and a strong decomposition especially under tropical conditions [18,72].…”
Section: Factor Analysis Applied On Molecular Composition Of Soil Parmentioning
confidence: 68%
See 1 more Smart Citation
“…Meanwhile, chain-length shortening in the fine POM fraction suggested a stronger decomposition of n-alkanes and n-alkenes than in both coarse POM and MAOM fractions [76]. In addition, we highlight large contributions from N-containing compounds and polysaccharide compounds in MAOM fraction, representing a microbial source and a strong decomposition especially under tropical conditions [18,72].…”
Section: Factor Analysis Applied On Molecular Composition Of Soil Parmentioning
confidence: 68%
“…The contribution of this group in coarse POM was much lower (7.2%, Table 2). A large contribution from N-containing compounds is often characterized by a microbial source [16,72]. In addition, several processes for physical protection, such as adsorption and aggregation, may be involved in the stabilization of amino acids or proteins [3].…”
Section: General Distribution and Origin Of Pyrolysis Products In Thementioning
confidence: 99%
“…Biomarker ratios have been used to examine the proportion of C derived from plant versus microbial compounds in modern soils [ 80 ] and paleosols [ 78 ]. Quaternary (<2.5 Ma) paleosols, which typically have relatively low amounts of organic matter from plant biopolymers, are predominantly made up of N compounds and carbohydrates from microbial cells [ 81 ]. Biomarkers of chitin are abundant in Quaternary paleosols, a common cell wall component of insects and fungi, known from the presence of 3-acetamidofuran, 3-acetamide-5-methylfuran, 3-acetamido-2-pyrone and oxazoline compounds [ 81 ].…”
Section: Type Structure and Function Of Organic Matter In Modern mentioning
confidence: 99%
“…The non-hydrolyzable SOM was marked by a similar distribution of Py-GC-MS and THM-GC-MS products for the ADE and adjacent soil profiles (Tables II and III), with only small differences in the relative abundances, which was mainly demonstrated by the dealkylation ratios of the pyrolysis product ( Figure 2). The pyrolysis of SOM obtained from mineral and organic soils generally leads to a high relative contribution of PAH and benzene derivatives [24,30,[38][39] of which alkyl benzenes and PAH have been attributed to the burning of biomass (BC) [24,[26][27]30], methoxyphenols from lignin and carbohydrates andcontaining compounds from microbes [40]. In this study, benzene was a prominent component in the ADE products, mainly at lower depths (36-150 cm), with a lower abundance being observed for the AS profile (Table II, p<0.05).…”
Section: Characterization Of Non-hydrolyzable Sommentioning
confidence: 99%
“…With respect to benzonitrile, its presence may be indicative of the presence of BC in the soils (Table II) [26]. A large contribution from N compounds in the pyrolysis products of SOM generally corresponds to a contribution from microbial material [40,[56][57][58]. Moreover, the N compounds in soils are usually considered to be pyrolysis products of residues from burned non-woody material (e.g., leaves and bones) [19,59].…”
Section: Characterization Of Non-hydrolyzable Sommentioning
confidence: 99%