12 research outputs found
Investigating challenges with scattering and inner filter effects in frontâface fluorescence by PARAFAC
No full textA novel approach combining self-organizing map and parallel factor analysis for monitoring water quality of watersheds under non-point source pollution
No full textAsymmetrical flow field-flow fractionation of white wine chromophoric colloidal matter
No full textInternational audiencewo analytical separation methods-size-exclusion chromatography and asymmetrical flow field-flow fractionation- were implemented to evaluate the integrity of the colloidal composition of Chardonnay white wine and the impact of pressing and fermentations on the final macromolecular composition. Wine chromophoric colloidal matter, representing UV-visible-absorbing wine macromolecules, was evaluated by optical and structural measurements combined with the description of elution profiles obtained by both separative techniques. The objective of this study was to apply these two types of fractionation on a typical Chardonnay white wine produced in Burgundy and to evaluate how each of them impacted the determination of the macromolecular chromophoric content of wine. UV-visible and fluorescence measurements of collected fractions were successfully applied. An additional proteomic study revealed that grape and microorganism proteins largely impacted the composition of chromophoric colloidal matter of Chardonnay wines. Asymmetrical flow field-flow fractionation appeared to be more reliable and less invasive with respect to the native chemical environment of chromophoric wine macromolecules, and hence is recommended as a tool to fractionate chromophoric colloidal matter in white wines
Leaching of Dissolved Organic Carbon and Trace Elements After Stem-Only and Whole-Tree Clear-cut on Boreal Peatland
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The ultravioletâvisible absorbance and fluorescence characterization of dissolved organic matter derived from the leaf litter of Populus simonii, Artemisia desertorum, Salix cheilophila, and Populus tomentosa
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Water-extractable organic matter and its fluorescence fractions in response to minimum tillage and organic farming in a Cambisol
No full textInfluence of sediment DOM on environmental factors in shallow eutrophic lakes in the middle reaches of the Yangtze River in China
No full textBed and suspended sediment-associated rare earth element concentrations and fluxes in a polluted Brazilian river system
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