Green downstream processing using supercritical carbon dioxide, CO2-expanded ethanol and pressurized hot water extractions for recovering bioactive compounds from Moringa oleifera leaves was written by Rodriguez-Perez, C.;Mendiola, J. A.;Quirantes-Pine, R.;Ibanez, E.;Segura-Carretero, A.. And the article was included in Journal of Supercritical Fluids in 2016.Product Details of 1731-94-8 The following contents are mentioned in the article:
A green platform based on a three-step downstream processing including the use of supercritical carbon dioxide (ScCO2), carbon dioxide-expanded ethanol (CXE) and pressurized hot water (PHWE) extractions has been developed to obtain different fractions from Moringa oleifera leaves. Each process was optimized based on the extraction yield. Optimal extracts were functionally characterized by measuring total phenolic (TPC) and total flavonoid contents (TF). The antioxidant activity by TEAC assay was also tested. Moreover, a chem. characterization of the extracts was performed by GC-MS and HPLC-ESI-QTOF-MS. The extraction yields of the optimized process were 3.1, 29.5 and 30.2% resp. The extraction of total phenolics was higher in PHWE than in CXE extract (62.4 vs. 20.3 mg GAE/g leaves) while TF showed the opposite (3.8 vs. 9.6 mg quercetin/g leaves resp.). ScCO2 fraction was rich in fatty acids such as α-linoleic acid and alkanes. CXE fraction was richer in glycosylated flavonoids than PHWE while the latest fraction was richer in phenolic acids, which could explain the higher antioxidant activity of this fraction (13.4 mmol Eq trolox/100 g dry leaves) compared to CXE (6 mmol Eq trolox/100 g dry leaves). This study involved multiple reactions and reactants, such as Methyl nonadecanoate (cas: 1731-94-8Product Details of 1731-94-8).
Methyl nonadecanoate (cas: 1731-94-8) belongs to esters. Volatile esters with characteristic odours are used in synthetic flavours, perfumes, and cosmetics. Certain volatile esters are used as solvents for lacquers, paints, and varnishes. Many esters have the potential for conformational isomerism, but they tend to adopt an s-cis (or Z) conformation rather than the s-trans (or E) alternative, due to a combination of hyperconjugation and dipole minimization effects. The preference for the Z conformation is influenced by the nature of the substituents and solvent, if present. Lactones with small rings are restricted to the s-trans (i.e. E) conformation due to their cyclic structure.Product Details of 1731-94-8
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Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics