Ho Chi Minh City, Vietnam
Ho Chi Minh City, Vietnam

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An T.N.M.,Dongguk University | Lee K.D.,Industrial University of Ho Chi Minh
Asian Journal of Chemistry | Year: 2013

A novel series of 2,4-disubtituted thiazole derivatives were synthesized. The structures of the compounds were established by IR, 1H, 13C NMR and mass spectroscopy. They were screened for antibacterial and antifungal activity against Bacillus megaterium, Bacillus cereus, Escherichia coli and Saccharomyces cerevisiae, Candida albicans, respectively.


Tho N.T.M.,Industrial University of Ho Chi Minh | An T.N.M.,Dongguk University | Tri M.D.,Vietnam Academy of Science and Technology | Sreekanth T.V.M.,Dongguk University | And 3 more authors.
Acta Chimica Slovenica | Year: 2013

Silver nanoparticles (AgNPs) were synthesized using a Nelumbo nucifera dry seed extract, which is a simple, non-toxic, eco-friendly "green material". The synthesized nanoparticles were confirmed by the color changes and characterized by UV-visible spectroscopy. The AgNPs were stable at room temperature for 2 months. Scanning electron microscopy (SEM) revealed the formation of well-dispersed and spherical shapes. Transmission electron microscopy (TEM) of the synthesized AgNPs showed the formation of spherical nanoparticles, 5.03-16.62 nm in size. Fourier transform infrared spectroscopy (FTIR) indicated the involvement of amine, aromatic and alkynes groups in the synthetic process. X-ray diffraction (XRD) confirmed the crystalline nature of AgNPs. These AgNPs were highly toxic to found to Gram negative bacteria.


Minh An T.N.,Dongguk University | Minh An T.N.,Industrial University of Ho Chi Minh | Kumar M.A.,Dongguk University | Chang S.H.,Daegu University | And 3 more authors.
Bulletin of the Korean Chemical Society | Year: 2014

A new series of carbazole based 2,4-disubstituted thiazole derivatives were synthesized. All the synthesized compounds were tested for their cytotoxicity against three different cancer cell lines A549, MCF-7, and HT29. Some of these compounds showed good cytotoxicity. These compounds were also evaluated for antioxidant activity. Compounds 3a, 3b, 3d-f and 3i showed higher antioxidant activity than standard BHT.


Nguyen M.A.T.,Dongguk University | Nguyen M.A.T.,Industrial University of Ho Chi Minh | Mungara A.K.,Dongguk University | Kim J.-A.,Yeungnam University | And 2 more authors.
Phosphorus, Sulfur and Silicon and the Related Elements | Year: 2015

A series of carbazole-based thiazole derivatives were synthesized and characterized. The title compounds were evaluated for their cytotoxicity against three cancer cell lines A549, MCF-7, and HT29 by MTT assay. Among several thiazole derivatives, compounds 4-(4-bromophenyl)-2-(2-((9-ethyl-9H-carbazol-3-yl)methylene)hydrazinyl)thiazole (3f) and 2-(2-((9-ethyl-9H-carbazol-3-yl)methylene)hydrazinyl)-4-(4-nitrophenyl)thiazole (3g) are found to display significant cytotoxicity against three cancer cell lines. These compounds have also been tested for antioxidant activity and are found to exhibit higher antioxidant activity than that of the standard BHT. Copyright © Taylor & Francis Group, LLC.


Kumar M.A.,Dongguk University | Minh An T.N.,Dongguk University | Minh An T.N.,Industrial University of Ho Chi Minh | Lee I.J.,Dongguk University | And 2 more authors.
Phosphorus, Sulfur and Silicon and the Related Elements | Year: 2015

A series of phenothiazine-based thiazole derivatives were synthesized and evaluated for their cytotoxicity against three cancer cell lines A549, MCF-7, and HT29 by MTT assay. Among several thiazole derivatives, compound 3d against HT29 cells and 3g against MCF-7 cells are found to display good cytotoxicity. These compounds have also been tested for antifungal and antioxidant activity. Some of these compounds exhibited significant antifungal activity and compound 3j was found to exhibit almost equivalent antioxidant activity as that of BHT. © 2015 Copyright Taylor & Francis Group, LLC.


Ha H.N.N.,Vietnam Academy of Science and Technology | Ha H.N.N.,Vietnam National University, Ho Chi Minh City | Phuong N.T.K.,Vietnam Academy of Science and Technology | Tho N.T.M.,Industrial University of Ho Chi Minh
Desalination and Water Treatment | Year: 2016

In this study, the performance of layered double hydroxides–polymer (LDHs–polymer) composite as an adsorbent for the removal of hexavalent chromate ion from aqueous solution was investigated. The LDHs–polymer composite was prepared by immobilizing LDHs into spherical alginate/polyvinyl alcohol (PVA)–glutaraldehyde composite (spherical polymer composite). Approximately 90.0–92.5% of chromium was removed by LDHs–polymer composite from an aqueous solution containing 45 mg Cr/L. The adsorption data were well explained by the pseudo-second-order kinetics model and the Langmuir isotherm model. The adsorption capacities of these LDHs–polymer composite were from 1.358 to 1.471 mg Cr/g at pH 7, as calculated from the Langmuir adsorption isotherm. The adsorption ability of the LDHs–polymer composite decreased by approximately 5–6% after five adsorption–desorption cycles. Significant reduction of the chromate removal was observed in the presence of carbonate and phosphate ions. The effect of co-existing anions on the chromate adsorption capacity followed in the order: (Formula presented.) Cl−. A fixed-bed column study was conducted with a real-life chromium-bearing plating wastewater sample. The breakthrough time was found to be from 5.5 to 7.5 h. Under optimized conditions, the LDHs–polymer composite removed more than 83–88% of total chromium in the solution. The results obtained in this study will be useful for further extending the adsorbents to the field scale or for designing pilot plants in future studies. From the viewpoint of environmental friendliness, the LDHs–polymer composite are a potential cost-effective adsorbent for chromate removal in water treatment. © 2016 Balaban Desalination Publications. All rights reserved.

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