Ethyl acetate fractions
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In this study, the antidengue virus activity of the ethanol extract from the leaves and twigs of E. cyathophora on four virus serotypes DENV1-DENV4 was examined. The result showed that the ethanol extract displayed antidengue activity on DENV1-4 with PRNT50 values of 15.625-62.5 µg/mL. This extract was fractionated to the n-hexane and ethyl acetate fractions.
7p dianmotminh02 03-05-2024 3 1 Download
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The study "Isolation and characterization of antibacterial compounds from Euphorbia tirucalli against Xanthomonas axonopodis pv. citri" focused on the comparison of the extraction yield and antibacterial properties of Euphorbia tirucalli against X. axonopodis pv. citri, phytochemical screening, quantification of phenolic and flavonoid contents of the fraction extract.
8p tieuvulinhhoa 22-09-2022 11 2 Download
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Fractions yielded from Phellinus gilvus fruiting bodies by liquid-liquid partition of methanol extract contained various bioactive compounds such as phenolics, flavonoids and terpenes. Butanol, water and ethyl acetate fractions had large amount of phenolics, 158.12 - 247.31 mg of gallic acid equivalents (GAE)/g and low amount of flavonoids, 21.74 - 36.05 mg of quercetin equivalents (QE)/g.
9p vimelindagates 18-07-2022 5 2 Download
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This study aimed to develop a comprehensive quantification of 20 bioactive compounds in Achillea millefolium L (A. millefolium) fractions obtained by different solvents (petroleum ether (pet-ether), ethyl acetate (EtOAc), methanol (MeOH) and water) using HPLC quantitative analysis.
7p schindler 30-12-2021 9 0 Download
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Sparsifloamide (1), a new sphingolipid, and sparsifloside (2), a new diglyceride galactoside, have been isolated from the ethyl acetate soluble fraction of the 80% ethanolic extract of the whole plant of Croton sparsiflorus Morong. Their structures were assigned by 1 H- and 13 C-NMR spectra and DEPT, COSY, NOESY, HMQC, HMBC, and ESI-MS experiments.
8p langthannam 29-12-2021 13 0 Download
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Liquid crystal (LC) compound 4-Benzyloxyphenyl 4-[4-(n-dodecyloxy)benzoyloxy]benzoate (BDBB) was prepared and characterized. Inverse gas chromatography (IGC) was to be a beneficial analysis method for the research of thermodynamic characteristics of the new LC. Acetate and alcohol isomers were used to examine LC selectivity via the IGC technique at temperatures between 333.2 K and 483.2 K.
15p tudichquannguyet 29-11-2021 8 1 Download
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Chromatographic separation of n-hexane and ethyl acetate fraction of a crude methanol extract obtained from aerial parts of the Scorzonera aucheriana DC collected from Sivas province of Turkey yielded nine natural compounds; two new 3-caffeoyl-quinic acid analogs (1-2), one new taraxasterol oleate (3), and six known triterpenoids taraxasterol (4), taraxasterol acetate (5), ptiloepoxide (6), lupeol (7), lupeol acetate (8), and β-sitosterol (9) were characterized.
11p tudichquannguyet 29-11-2021 4 1 Download
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Tagetes patula is used to treat cancer patients in alternative healthcare systems. However, its cytotoxic and genotoxic effects have not been reported. Therefore, the methanol extract of T. patula flower, the ethyl acetate fraction, and the pure compound patuletin were evaluated using the Allium test. The methanol extract and fraction contained ~3% and ~36% patuletin, respectively, with ~98% purity. The methanol extract caused inhibition of Allium root growth displaying an IC50 value of ~500 µg/mL, while the fraction and patuletin were more potent by ~2 and ~5 times, respectively.
14p thiencuuchu 27-11-2021 2 1 Download
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Stemona collinsae Craib is a medicinal plant, which has been reported previously with various biological properties such as insecticidal, anticancer, antioxidant and antifungal activities. In this study, further characterization of S. collinsae roots was performed with four fractions, namely n-hexane, ethyl acetate, butanol and water fractions from methanolic root extract.
9p viwinter2711 05-10-2021 13 1 Download
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In this study, five extracts and fractions of the aerial parts of Ludwigia hyssopifolia (G. Don) Exellincluding n-hexane, chloroform, ethyl acetate, methanol, and ethanol ones were screened for anti-H. pylori activity by disk diffusion method.
6p nguaconbaynhay11 07-04-2021 17 1 Download
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In this paper, apigenin was isolated from the ethyl acetate extract and performed of column chromatography with solvent system n-hexane: ethyl acetate (100 % 1: 1) of Apium graveolens L. to obtain 7 fractions. Fraction 7 was applied on column chromatography with nhexane: ethyl acetate (2:1).
12p nguaconbaynhay11 01-04-2021 13 2 Download
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In this work, lignin was prepared from the Earleaf Acacia tree using the soda method. Then, the prepared lignin was fractionated by the sequential solvents of ethyl acetate, ethanol, methanol, and acetone. The lignin's fractions were characterized by FT-IR and GPC.
7p kequaidan10 05-03-2021 17 3 Download
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The maceration was applied to the seeds of the plant to afford the crude extract which was then fractionated by liquid-liquid extraction to obtain the ethyl acetate extract. The extract was carried out by using normal phase silica gel column chromatography and thin-layer chromatography. Analysis of spectroscopic data including HR-ESI-MS, 1D and 2D-NMR and a comparison of the NMR data with that in the literature led to the structural elucidation of isolated compounds.
4p larachdumlanat127 02-01-2021 8 1 Download
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To isolate and determine chemical structure of compounds from Helicteres hirsuta Lour. Subjects and methods: The aerial part of the Helicteres hirsuta Lour. collected in A Luoi district, Thua Thien Hue province in March 2019 were powdered and extracted with different solvents including ethyl acetate.
7p visamoa2711 12-01-2021 7 2 Download
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The methanol extract of P. palatiferum (Nees) Radlk. leaves exhibited a moderate inhibitory effect on the L-3,4-dihydroxyphenylalanine (L-DOPA) oxidase activity of tyrosinase in the melanin biosynthesis pathway. Further study may lead to new bioactive compounds from ethyl acetate and n-hexane fractions.
11p tamynhan5 10-12-2020 26 1 Download
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Most fractional extracts from fruits and leaves of P. tectorius ex. J.P. du Roi collected in the Bach Ma National Park, Thua Thien - Hue Province, have remarkable cytotoxic activity against KB cell lines. Of these, ethyl acetate extracts have the best activity (with IC50 values of 24 to 48 µg/mL). The main volatile components were identified by gas chromatography/mass spectrometry (GC/MS).
5p tamynhan5 10-12-2020 15 1 Download
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This fraction showed the highest antioxidant activity by dose-dependent free radical scavenging action (IC50 69.50 ± 1.55 µg/mL). R. tomentosa leaf extracts, especially the n-hexane fraction, also exhibited strong antimicrobial activity against Gram-negative and Gram-positive bacteria and fungi as well as moderate inhibitory effect on L-DOPA (L-3,4-dihydroxyphenylalanine) oxidase activity of tyrosinase in the melanin biosynthesis pathway.
9p tamynhan8 04-11-2020 11 1 Download
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This fraction and the ethanol extract from green tea were also able to induce the expression of hyperpolarizationactivated cyclic nucleotide-gated channel 4 (HCN4), the important factor for automatic beating of SAN, but insignificantly (P > 0.05). In conclusion, neonatal cardiomyocytes were isolated and suitable for use as a model for screening of pacemaker cell transduction effects of potential candidates. From this study, the garlic ethyl acetate fraction presented as the most promising nominee for further neonatal cardiomyocyte transdifferentiating effects.
9p nguyenxuankha_bevandan 14-08-2020 20 1 Download
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Osteogenesis activity of fractions extracted from Clinacanthus nutans was evaluated on an in vitro model using osteoblast MC3T3-E1 cells. The results showed that all fractions, including ethanol (EtOH), n-hexane, ethyl acetate (EtOAc) and butanol (BuOH) were not significantly toxic to the osteoblast cells at the test concentrations of 5, 10, 25, and 50 µg/mL.
7p xilank_of 22-07-2020 25 2 Download
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The purpose of this study was to investigate the antibacterial and anti-fungal activities of four species Sargassum namely: Sargassum polycystum, Sargassum oligocystum, Sargassum crassifolium and Sargassum cristaefolium collected along the coastal areas of Diora-Zinungan Sta. Ana Cagayan, Philippines. Extracts of powdered seaweeds were prepared using sequential extraction with different organic solvents in order to increasing the polarity (Ethanol, n-hexane, dichloromethane and ethyl acetate and aqueous).
14p nguaconbaynhay6 24-06-2020 19 1 Download