Lanostane Triterpenoids from Ganoderma tropicum Collected in Vietnam and Their Nitroblue Tetrazolium Reductive Activity In Vitro

A new compound, 3β-acetoxylanosta-7,9(11),24-triene-26-al (3), and seven known compounds (1 – 2 and 4 – 8) were isolated from Ganoderma tropicum (Jung.) Bres. collected in Tay Nguyen, Vietnam. The structures of these compounds were determined by one- and two-dimensional nuclear magnetic resonance spectroscopy, electrospray ionization mass spectrometry (ESI-MS), and high-resolution ESI-MS, and by comparison with literature data. All of the isolated compounds were tested for nitroblue tetrazolium (NBT) reduction activity in Saccharomyces cerevisiae-stimulated RAW 246.7 cells. Among them, compounds 2 – 4 and 6 – 8 enhanced the NBT reduction in a dose-dependent manner.

Lanostane Triterpenoids from Ganoderma tropicum Collected in Vietnam and Their Nitroblue Tetrazolium Reductive Activity In Vitro

A new compound, 3β-acetoxylanosta-7,9(11),24-triene-26-al (3), and seven known compounds (1 – 2 and 4 – 8) were isolated from Ganoderma tropicum (Jung.) Bres. collected in Tay Nguyen, Vietnam. The structures of these compounds were determined by one- and two-dimensional nuclear magnetic resonance spectroscopy, electrospray ionization mass spectrometry (ESI-MS), and high-resolution ESI-MS, and by comparison with literature data. All of the isolated compounds were tested for nitroblue tetrazolium (NBT) reduction activity in Saccharomyces cerevisiae-stimulated RAW 246.7 cells. Among them, compounds 2 – 4 and 6 – 8 enhanced the NBT reduction in a dose-dependent manner.

Investigation on residual quantities of some insecticides on some medicinal plants cultivated at Nghia Trai hamlet, Tan Quang commune, Hung Yen province

In 6 simples of Nga Truat. 2 simples of Dia Lien, 2 samples of Cu Coc collected in Nghia Trai village. There was no-orgam chlorine pollutants; but in 1 of 9 samples of camomille containing cypermethrine residue exceeded the normal standard

Elaboration of analytic method and preliminary results of initial investigation on chemical residues of chloro-organo-pesticides in Sanchi (Panax pseudoginseng Wall)

A solid phase extraction (SPE) and GC-ECD for multi-residues determination of 14 organo-chlorinated pesticides (OCPs) in radix Pseudo-ginseng were introduced. Using n-hexane as extracting solvent and silica gel for clean up of sample extract, with GC-ECD analysis, good separation of 14 OCPs and carbophenothion(IS) was achieved on capillary column coated with poly(5% diphenyl) siloxane. Experiments showed that n-hexane is adequate as extracting solvent(percentage of recovery70% for 13 in total 14 analyses), the LOD was about 0.35 to 1.6 ppb for blank sample spiked with standards. The method has been carried out on 7 samples collected from market for preliminary investigation of its actual OCPs residues. For 14 OCPs being analysed, results showed that all samples to be examined are complied with requirements of MRL in USP 24 or in Eur. P97.We may conclude that those samples were cultivated in less contaminated soils or none of 14 OCPs was still in illegal use