Dosage par chromatographie liquide haute-performance des composés phénoliques libérés par hydrolyse d'acides humiques

Serve, Léon; Piovetti, Louis; Longuemard, Nicole

doi:10.1016/s0021-9673(01)83629-3

Cited by 10 publications

(5 citation statements)

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“…The ratios of those compounds in lignins are plant species specific. It was also shown that, despite a considerable transformation of lignins during plant material humification, determining the ratio of the compounds allows for determining their origin [ 8 , 9 , 12 , 13 , 14 , 15 ]. As reported by Kovaleva and Kovalev [ 12 ], lignins of herbaceous plants contain higher amounts of cinnamyl compounds than the contents of vanillyl and syringyl compounds.…”

Section: Discussionmentioning

confidence: 99%

“…The papers that report on a comparison of the hydrolysis method for plant material and soils are missing. Assaying the contents of phenolic compounds in soils facilitates the evaluation of the degree of plant residue decomposition in soil [ 8 , 9 , 10 , 11 , 12 , 13 ]. Besides, determining at least the mutual proportions of phenolic compounds of the syringyl, vanillyl, and cinnamyl type makes it possible to determine the genus of the plant undergoing decomposition in soil [ 11 , 12 , 14 , 15 ].…”

Section: Introductionmentioning

confidence: 99%

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Content of Phenolic Compounds in Meadow Vegetation and Soil Depending on the Isolation Method

2020

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The aim of this paper was to determine the effect of the hydrolysis method on the amounts of phenolic compounds in the plant material in soil and, as a consequence, on the parameters to determine the degree of lignins transformation in soils. The study included the plant material (hay, sward, and roots) and soil—Albic Brunic Arenosol (horizon A, AE, and Bsv) samples. Phenolic compounds were isolated at two stages by applying acid hydrolysis followed by alkaline re-hydrolysis. The quantitative and qualitative analysis of phenolic compounds was performed with high-performance liquid chromatography with a DAD. The content of phenolic compounds in the extracts depended on the hydrolysis method and it was determined by the type of the research material. The amounts of phenolic compounds contained in the alkaline hydrolysates accounted for 55.7% (soil, horizon Bsv)—454% (roots) of their content in acid hydrolysates. In the extracts from acid hydrolysates, chlorogenic and p-hydroxybenzoic acids were dominant. In the alkaline extracts from the plant material, the highest content was recorded for p-coumaric and ferulic acids, and in the extracts from soil, ferulic and chlorogenic acids. A combination of acid and alkaline hydrolysis ensures the best extraction efficiency of insoluble-bound forms of polyphenols from plant and soil material.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Content of Phenolic Compounds in Meadow Vegetation and Soil Depending on the Isolation Method

2020

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“…As reported in literature 39,40,44,[53][54][55][56] , the quantitative composition of phenolic compounds depends not only on the type of the research material but also on the degree of the decomposition of the organic matter of soil. As seen from the dependencies presented earlier (Fig.…”

Section: Lignin Decomposition Parametersmentioning

confidence: 99%

Transformations of phenolic compounds in meadow soils

Ziolkowska

Dębska

Banach-Szott

2020

Sci Rep

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The aim of the research has been to determine the role of phenolic compounds in the processes of transformations of organic matter in meadow soils, leading to the formation of humic substances. The research has been performed based on the plant material and soil sampled from Europe’s unique complex of permanent grasslands irrigated continuously for 150 years applying the slope-and-flooding system, the Czerskie Meadows. Phenolic compounds were isolated from the plant material samples (hay, sward and roots) and soils (horizon A, AE and Bsv) and from the fraction of humic and fulvic acids. It was found that the contents of phenolic compounds decrease in the following order: hay > sward > roots > A horizon soil > AE horizon soil > Bsv horizon soil > A horizon fulvic acids > AE horizon fulvic acids > Bsv horizon fulvic acids > A horizon fulvic acids > AE horizon fulvic acids > Bsv horizon fulvic acids. A significantly higher share of cinnamyl than vanillyl and syringyl compounds in the extracts of fulvic acids and slightly higher in the hydrolysates of humic acids confirms the effect of the chemical composition of the plant material undergoing decomposition on the properties of the emerging humic substances.

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“…Separation and determination of phenolic monomeric units are achieved by HPLC (Hartley and Buchan, 1979;Serve et al, 1983;Serve and Piovetti, 1984). In the bulk of the 28 compounds measured, 11 represent (after Hedges and Ertel [1982]) the monomeric constituents derived from lignin by copper oxide oxidation.…”

Section: Phenolic Compoundsmentioning

confidence: 99%

Indicators of climate and sediment-source variations at Site 959: implications for the reconstruction of paleoenvironments in the Gulf of Guinea through Pleistocene times

Giresse¹,

Gadel²,

Serve³

et al. 1998

Proceedings of the Ocean Drilling Program, 159 Scientific Results

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Leg 159 Ocean Drilling Project Site 959 (in 2100 m water depth and ~120 km off the west African coast) is located on a small plateau that extends on the northern flank of the Côte d'Ivoire-Ghana Marginal Ridge. Because of its topographic position, this site was largely isolated from mass gravitational or turbidity flows coming from the continental shelf and slope. This very steep transform margin, on the other hand, has probably established interference of bottom-water circulation. The Hole 959C depth corresponds roughly to the interface between North Atlantic Deep Water and South Atlantic Intermediate Water. The very moderate linear sedimentation rates (~1−2 cm/k.y.) are relatively constant throughout the Pleistocene interval. This pronounced low sedimentation rate most likely reflects the persistent activity of deep-water circulation. Based on the oxygen isotopic record, two stratigraphic gaps are reported between 1.6 and 0.99 Ma and between 0.20 and 0.12 Ma, and are attributed to enhanced bottom-water circulation. This water circulation implies that significant changes in winnowing activity occurred in this site during the last 1 m.y. Detailed microstructural analysis indicates a number of laminae 1 mm to 1 cm thick with increased concentration of foraminifers resulting from the recurrent winnowing process (contourite). Many more glauconitic infillings of foraminifers were observed ~1−0.9 Ma, just after the major hiatus. Assuming that the superficial redistribution of the sediment was favorable to longer contact with seawater and to mineralization, the green grain concentration supports the indication of an uneven beginning of sedimentation after the hiatus.The carbonate average concentrations tend to increase from ~20%−30% in the lower part of the section to ~35%−40% in the upper part. Organic carbon increases ~0.7%−0.8% in the lower part to 1%−1.1% in the upper part. However, accumulation rates for carbonate and organic carbon closely follow bulk accumulation rate records that correspond to an average of the bottom-current winnowing intensity. Consequently, cyclic variations in relative abundances of carbonate and noncarbonate components do not appear to correspond clearly or closely to glacial/interglacial cycles. The older section (before 1.5 Ma) shows some evidence of maxima in productivity of calcareous foraminifers during interglacial cycles. Conversely, maxima of organic carbon are connected to glacials and may be enhanced by local upwelling. Both of these indicators have been used in the same way to identify the steps of the last 125 k.y. Such cyclic variations are similar to those of neighboring sites on the slope of the eastern equatorial Atlantic, but from ~1 to ~0.2 Ma, the highest variabilities are recorded and attributed to enhanced sediment redistribution. In the same section, the highest variation ranges of major components prevailed at the time when the climatic change had the maximum effect. It is difficult to assess, therefore, if eustatic and climatic cycles or stronger current in...

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Dosage par chromatographie liquide haute-performance des composés phénoliques libérés par hydrolyse d'acides humiques

Cited by 10 publications

References 10 publications

Content of Phenolic Compounds in Meadow Vegetation and Soil Depending on the Isolation Method

Content of Phenolic Compounds in Meadow Vegetation and Soil Depending on the Isolation Method

Transformations of phenolic compounds in meadow soils

Indicators of climate and sediment-source variations at Site 959: implications for the reconstruction of paleoenvironments in the Gulf of Guinea through Pleistocene times

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