Vietnam Journal of Chemistry
ESCI-ISI ACI (2019-2022)SCOPUS (2018-2023)
2525-2321
2572-8288
Việt Nam
Cơ quản chủ quản: Vietnam Academy of Science and Technology and Wiley-VCH , Wiley-Blackwell Publishing Ltd , WILEY
Lĩnh vực:
Chemistry (miscellaneous)
Các bài báo tiêu biểu
Preparation and characterization of nanosilica from rice husk ash by chemical treatment combined with calcination
- 2017
This work presented the results of the study on synthesis and characterization of nanosilica from rice husk ash (RHA). Nanosilica was obtained by calcination of HCl treated RHA at 700 oC for 2 h. X-ray diffraction (XRD) pattern showed only one peak at 2q ~22o confirming the amorphous structure of nanosilica. The chemical composition assessed by energy dispersive X-ray spectroscopy (EDX) showed tha...... hiện toàn bộ
#Rice husk ash #nanosilica #amorphous
Flavonoid glycosides from Antidesma ghaesembilla
Tập 53 Số 2e - 2015
Four flavone glycosides were isolated from the leaves of Antidesma ghaesembilla. They were elucidated to be vitexin, orientin, isovitexin, and homoorientin by 1D- and 2D-NMR and in comparison with literature data. These compounds have been reported from the genus Antidesma for the first time.
#Antidesma ghaesembilla #vitexin #orientin #isovitexin #homoorientin
Study of the formation of porous hydroxyapatite ceramics from corals via hydrothermal process.
Tập 48 Số 5 - 2012
The hydrothermal method was used for preparation porous hydroxyapatite (HA) ceramic from coral scaffold, in two ways: synthesized directly from coral skeleton and synthesized from CaO, which was product of coral thermal decomposition. The obtained samples were characterized by techniques including X-ray diffraction (XRD), Scanning electron microscopy (SEM) and Fourier transform infrared spectrosco...... hiện toàn bộ
Visible light photocatalytic degradation of organic dyes using W‐modified TiO2 /SiO2 catalyst
Tập 59 Số 5 - Trang 620-638 - 2021
Study on the Chemistry and Antimicrobial Activity of Psychotria reevesii Wall. (Rubiaceae)
Tập 45 Số 5 - 2012
The first chemical investigation on Vietnamese medicinal plant Psychotria reevesii Wall. (Rubiaceae) led to the isolation and structural determination of β-sitosterol and stigmasterol as a mixture, 1-octacosene, and asperglaucide from n-hexane- and CHCl3-soluble fractions of MeOH extract from the aerial parts of P. reevesii. Phytochemical screening based on color reactions, HPLC analysis, and NMR ...... hiện toàn bộ
Futher study on chemical constituents and biological activities of Alpinia conchigera Griff. (Zingiberaceae)
Tập 45 Số 2 - 2012
β-Sitosterol, stigmasterol, cardamomin (1), chalconaringenin 2′-O-methyl ether (2), alpinetin (3), and naringenin 5-O-methyl ether (4) were isolated from the MeOH extract of Alpinia conchigera Griff. (Zingiberaceae). Their structures were determined on the basis of spectroscopic analyses. The antimicrobial and free radical scavenging activities of the isolates 1-4 were evaluated in correlation wit...... hiện toàn bộ
Kinetics and mechanism of graft polymerization of acrylic acid onto starch initiated with ceric ammonium nitrate.
Tập 48 Số 5 - 2012
Graft polymerization of acrylic acid (AA) onto tapioca starch was carried out using ceric ammonium nitrate (CAN) as initiator in aqueous nitric acid medium. The kinetics of the graft polymerization of AA onto starch was studied by gravimetric method. The following rate expression (rate of graft polymerization) Rg = k. [AA]1.02 [CAN]0.478 [Starch]0.543 was obtained and a suitable mechanism was sugg...... hiện toàn bộ
Triterpene from the roots of Codonopsis pilosula.
Tập 46 Số 4 - 2012
From the roots of Codonopsis pilosula (Franch) Nannf (Campanulaceae) five triterpenoids: taraxerol, taraxeryl acetate, 14-a-taraxeran-3-one and D:B-friedoolean-5-ene-3-b-ol as well as a-spinasterone were isolated. Their structures have been identified by MS, 1H-, 13C-NMR spectroscopy and comparison with reported data.
Phân lập và xác định cấu trúc của các hợp chất tritecpen từ cây xạ đen
Tập 46 Số 4 - 2012
Chemical investigation of Celastrus hindsii Benth. growing in Quang Binh province, Vietnam led to the isolation and structural elucidation of clionasterol, D:A-friedo-oleanane-3,21-dione, lup-20(29)-ene-3b-ol and lup-12-ene-3b-ol. Their structures were determined on the basis of MS, NMR spectra and comparison with reported data.
Chemical constituents of Belamcanda chinensis (L.) DC
Tập 47 Số 5 - 2012
From the ethyl acetate extract of the rhizomes from Belamcanda chinensis (Iridaceae) five compounds irisflorentin (1), tectorigenin (2), iristectorigenin A (3), irigenin (4), and acetovanillone(5) were isolated. Their structures were elucidated by spectroscopic methods. This is first report of 5 from B. chinensis. Keywords: Belamcanda chinensis, Iridaceae, acetovanillone.