10 research outputs found
Impact of catalytic oil palm fronds (OPF) pulping on organosolv lignin properties
No full textInternational audienceThis article sheds light on the structural characteristic and antioxidant activity of the ethanol organosolv lignin extracted from oil palm fronds (OPF) via incorporation of 1,8-dihydroxyanthraquinone during the delignification process. The resulting modified organosolv lignin (DEOL) was studied by P-31 NMR, HSQC, HMBC and GPC. It was proposed that addition of a catalytic amount of 1,8-dihydroxyanthraquinone during pulping process; (1) enhanced the dissolution of lignin and the delignification rate, (2) improved the solubility of the resulting modified lignin (DEOL) by reducing its hydrophobicity properties and (3) improved its antioxidant activity compared to untreated organosolv lignin (EOL) (DEOL: 78% and EOL: 53% of Oxygen Uptake Inhibition (OUI) respectively). It was shown that antioxidant activity was closely related to its average molecular weight and phenolic hydroxyl content
Triumfettosterol Id and Triumfettosaponin, a New (Fatty Acyl)-Substituted Steroid and a Triterpenoid Dimer Bis(-D-glucopyranosyl) Ester from the Leaves of Wild Triumfetta cordifolia A. Rich. (Tiliaceae)
No full textInternational audienc
Physicochemical of microcrystalline cellulose from oil palm fronds as potential methylene blue adsorbents
No full textInternational audienc
Tetranuclear and dinuclear phenoxido bridged copper complexes based on unsymmetrical thiosemicarbazone ligands
No full textInternational audienc
New Nortriterpenoid and Ceramides From Stems and Leaves of Cultivated Triumfetta cordifolia A Rich (Tiliaceae)
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Experimental and thermodynamic comparison of the separation of CO2/toluene and CO2/tetralin mixtures in the process of organogel supercritical drying for aerogels production
No full textUsing EPR Spectroscopy as a Unique Probe of Molecular-Scale Reorganization and Solvation in Self-Assembled Gel-Phase Materials
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