Nguyen Ngoc Tuan

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Diet samples were collected to estimate dietary intakes of 232Th, 238U, cesium, and strontium for Vietnamese adults using duplicate portion studies and market basket studies. Average concentrations of 232Th, 238U, cesium, and strontium in diet samples were 4.0 ng/g-dry, 2.5 ng/g-dry, 41 ng/g-dry, and 4.5 ng/g-dry, respectively. Daily intakes per person for(More)
Caryota mitis L., a flowering plant, belongs to the family Arecaceae. In Vietnam, its fruits were used to treat joint pain. The present study was designed to investigate the phytochemicals and chondrocyte proliferation activity of C. mitis L. fruits on young human chondrocyte. The results showed that all of extracts (crude extract as well as n-hexane,(More)
One new schiartane-type triterpene, heteroclitalactone N (1), and four known compounds (2-5), seco-coccinic acid F, dihydroguaiaretic acid, schizanrin F, and kadsuralignan B were isolated from the stems of Kadsura heteroclita. Their structures were determined by the combination of spectroscopic and chemical methods, including 1D-, 2D-NMR, and CD spectra as(More)
Chemical profiles of essential oils from four Fissistigma species: Fissistigma bracteolatum Chatt., Fissistigma villosissimum Merr., Fissistigma latifolium (Dunal) Merr. and Fissistigma glaucescens (Hance) Merr. were analysed by gas chromatography-flame ionisation detector and gas chromatography-mass spectrometry. Fissistigma essential oils consist mainly(More)
A chemical investigation of the fruiting bodies of Hexagonia apiaria resulted in the identification of nine compounds including five new triterpenoids, hexagonins A-E (1-5), along with four known compounds. The purified constituents were examined for their anti-inflammatory activity. Among the tested compounds, hexatenuin A displayed the most significant(More)
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