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
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 ...
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.
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...
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...
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...
Anthraquinones from the roots of Paederia scandens
Tập 47 Số 1 - 2012
Chemical investigation on the ethyl acetate extract of the roots of Vietnamese
Paederia scandens resulted in the isolation of one new anthraquinone,
1,3-Dihydroxy-2,4-dimethoxy-9,10-anthraquinone (1), together with three known
anthraquinones, 2-Hydroxy-1,4-dimethoxy-9,10-anthraquinone (2),
1-Methoxy-2-methoxymethyl-3-hydroxy-9,10-anthraquinone (3),
1-Hydroxy-2-hydroxymethyl-9,10-anthraquinone (4)....
Invited review. Bond dissociation enthalpies in benzene derivatives and effect of substituents: an overview of density functional theory (B3LYP) based computational approach
Tập 55 Số 6 - Trang 679 - 2018
In this review, we have mainly focused on the recent computational studies on
the bond dissociation enthalpies (BDE) of the X‒H bonds of the para and meta
substituted benzene derivatives (3Y-C6H4X‒H and 4Y-C6H4X‒H with X = O, S, Se,
NH, PH, CH2, SiH2 and Y = H, F, Cl, CH3, OCH3, NH2, CF3, CN, NO2). In addition,
the remote substituent effects on the BDE(X‒H), the radical stability and parent
one ha...
#Benzene derivatives #density functional theory #bond dissociation enthalpies #substituent effects #radical effect #ground state effect #total effect #Hammett constants
Tổng hợp bột hiđroxyapatit kích thước nano bằng phương pháp kết tủa hóa học
Tập 45 Số 2 - 2012
Hydroxyapatite (HA) powder was synthesized by simple precipitation method using
H3PO4and Ca(OH)2at the different temperatures. The obtained HA samples were
examined using methods of XRD, SEM, FTIR and TGA. The investigations indicated
that precipitating at ambient temperature can create the single phase HA powder
with the particle size under 100 nm.