Vietnam Journal of Chemistry
ESCI-ISI ACI (2019-2022)SCOPUS (2018-2025)
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)
Phân tích ảnh hưởng
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...
#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
Effect of edible coating and antifungal emulsion system on Colletotrichum acutatum and shelf life of strawberries
Tập 58 Số 2 - Trang 237-244 - 2020
AbstractThe edible coating based on sodium alginate, chitosan, carrageenan
combined with antifungal emulsion system has improved the quality and shelf life
of strawberries in 16 days of storage at 4 oC. The result of determining the
minimum fungicidal concentration (MFC) of emulsions made from cassia oil in
surfactants (Tween 20 with or without ethanol) against Colletotrichum acutatum
was 121 and ...
Visible light photocatalytic degradation of organic dyes using W‐modified TiO2 /SiO2 catalyst
Tập 59 Số 5 - Trang 620-638 - 2021
AbstractIn the present study, the synthesis of W‐modified TiO2/SiO2 composite
and its catalytic activity in the visible light region is demonstrated. The
W‐modified TiO2/SiO2 composite was obtained from the hydrolysis of a mixture
containing titanium (IV) oxysulfate, ammonium metatungstate, and SiO2 powder in
an alkaline medium. The obtained materials were characterized by using X‐ray
diffraction ...
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.
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...
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...
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.
Pinoresinol and 3,4',5,7-tetrahydroxy-3'-methoxyflavanone from the fruits of Silybum marianum (L.) Gaertn
Tập 45 Số 2 - 2012
From the fruits of Silybum marianum (L.) Gaertn. cultivated in the North of
Vietnam, (±)2,6-bis(4′-hydroxy-3′-methoxy-phenyl)-3,7-dioxabicyclo[3.3.0]octane
(pinoresinol) (1) and 3,4′,5,7-tetrahydroxy-3′-methoxyflavanone (2) were
isolated. Their structures were elucidated by analyses of the NMR and mass
spectra in comparison with the reported data. This is the first report of both 1
and 2 from Sily...