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Hieu Trung Bui,박준서,정옥희,Joseph Dela Cruz 한국고분자학회 2014 Macromolecular Research Vol.22 No.12
This study focused on the development of biomedicated electrospun nanofiber mats for preventing woundinfections and accelerating wound healing. Polycaprolactone (PCL) nanofibers-loaded curcumin (Cur) and polyethyleneglycol (PEG) were generated by an electrospinning technique. The change in surface morphology of the electrospunnanofibers to porous surface after immersion was obtained by field emission scanning electron microscopy(FE-SEM). The biological characteristics of the Cur-loaded PCL-PEG nanofiber mats such as cell viability, cellattachment, anti-inflammatory and antibacterial properties, and in vivo wound healing capability were examined. The blending of PEG with PCL resulted in the formation of pores on the nanofibers after immersion, which supportscell viability and proliferation. The mouse myoblast cell line C2C12 showed about 80% viability on the Cur-loadedPCL-PEG nanofiber mat. SEM images showed that the cells could extremely attach and spread out over the surfaceof the Cur-loaded PCL-PEG nanofiber mat. The inclusion of 0.5 wt% Cur (with respect to PCL) in both the PCLand PCL-PEG blended nanofiber mats inhibited excessive production of nitric oxide (NO) in RAW264.7 mousemacrophages and exhibited good antibacterial activity against Staphylococcus aureus (S. aureus). In vivo woundhealing showed that the treatment using Cur-loaded PCL-PEG nanofiber mat significantly increased the rate ofwound closure (99%) on day 10 as compared that using PCL nanofiber mat (59%). These results suggest that thePCL nanofiber matrix containing Cur and PEG can facilitate wound healing with cell proliferation and anti-inflammatoryproperties.
Design, Synthesis and In Vitro Cytotoxic Activity Evaluation of New Mannich Bases
Bui, Trung Hieu,Le, Thi Thuy,Vu, Thu Thuy,Hoang, Xuan Tien,Luu, Van Chinh,Vu, Dinh Hoang,Tran, Khac Vu Korean Chemical Society 2012 Bulletin of the Korean Chemical Society Vol.33 No.5
A series of Novel Mannich bases has been synthesized and evaluated $in$ $vitro$ cytotoxic activity against the human hepatocellular carcinoma (HepG2), human lung carcinoma (SK-LU-1), and human breast cancer (MCF-7). Compound $\mathbf{9f}$ was found to be most potent against three cell lines with $IC_{50}$ values of 1.57, 1.16 and 1.21 ${\mu}g$/mL, respectively. In addition, compounds $\mathbf{9g}$, $\mathbf{10f}$ exhibited very significant activity against MCF-7 cell line with $IC_{50}$ values of 2.0 ${\mu}g$/mL.
Bui, Hieu Trung,Kim, Do Youb,Kim, Dong Wook,Suk, Jungdon,Kang, Yongku Elsevier 2018 Carbon Vol.130 No.-
<P><B>Abstract</B></P> <P>Non-woven mats constructed from carbon nanofibers with metal (Pt, Co, or Pd) nanoparticles on their surfaces (CNF@metal) were fabricated by coaxial electrospinning for use in non-aqueous lithium‒oxygen (Li‒O<SUB>2</SUB>) battery (LOB) cathodes. Through coaxial electrospinning, the metal nanoparticles were evenly distributed on the CNF surfaces, and the samples were directly applied as LOB cathodes. Although the Co and Pd nanoparticles did not promote the desired Li‒O<SUB>2</SUB> reactions, the CNF@Pt exhibited much improved electrochemical performance with highly reversible Li‒O<SUB>2</SUB> operations. Therefore, the Li‒O<SUB>2</SUB> cell using the CNF@Pt cathode exhibited significantly enhanced specific capacity, rate capability, energy efficiency, and cycle stability compared to the other samples. The observed formation of Li<SUB>2</SUB>O<SUB>2</SUB> film, rather than toroidal particles, on the CNF@Pt after an early stage of discharge may be attributed to greatly reduced overpotentials both on discharge and charge, as well as a considerably prolonged cycle life (163 cycles) with a limiting capacity of 1000 mAh/g<SUB>c</SUB> at a current density of 500 mA/g<SUB>c</SUB>. In particular, <I>in-situ</I> differential electrochemical mass spectrometry studies revealed that the cycles of the Pt-catalyzed Li‒O<SUB>2</SUB> cell were mainly based on the reversible formation/decomposition of Li<SUB>2</SUB>O<SUB>2</SUB>, as evidenced by high O<SUB>2</SUB> evolution and negligible CO<SUB>2</SUB> evolution, even after long-term cycles.</P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
Ambitious and Challenging Targets for New Generation Network
Tran Minh Anh,Bui Trung Hieu,Nguyen Chien Trinh,Bui Thi Minh Tu 대한전자공학회 2016 IEIE Transactions on Smart Processing & Computing Vol.5 No.3
Today, the Internet has penetrated almost all the ins and outs of social life, has changed work, communications, social influence and the lifestyle of humankind. However, it is still short of flexibility, transparency etc., due to network address translator overuse, masschanges, uncomfortable protocols, and so on. Hence, more research is necessary into future telecommunications networks based on contemporary networks accompanied by new requisitions and new designs that are compatible with today’s and tomorrow’s demands. This paper researches a new vision of the telecommunication network of the future, its effects on human life and society, and the targets to achieve a new generation network (NwGN). In the paper, we also propose orientation towards an NwGN from the current networks, especially with Vietnam’s telecommunications networks.
Facile synthesis of SnO2eZnO coreeshell nanowires for enhanced ethanol-sensing performance
Dang Thi Thanh Le,Do Dang Trung,Nguyen Duc Chinh,Bui Thi Thanh Binh,Hoang Si Hong,Nguyen Van Duya,Nguyen Duc Hoa,Nguyen Van Hieu 한국물리학회 2013 Current Applied Physics Vol.13 No.8
The design of coreeshell heteronanostructures is powerful tool to control both the gas selectivity and the sensitivity due to their hybrid properties. In this work, the SnO2eZnO coreeshell nanowires (NWs) were fabricated via two-step process comprising the thermal evaporation of the single crystalline SnO2 NWs core and the spray-coating of the grainy polycrystalline ZnO shell for enhanced ethanol sensing performance. The as-obtained products were investigated by X-ray diffraction, scanning electron microscopy,and photoluminescence. The ethanol gas-sensing properties of pristine SnO2 and ZnOeSnO2 core eshell NW sensors were studied and compared. The gas response to 500 ppm ethanol of the coreeshell NW sensor increased to 33.84, which was 12.5-fold higher than that of the pristine SnO2 NW sensor. The selectivity of the coreeshell NW sensor also improved. The response to 100 ppm ethanol was about 14.1,whereas the response to 100 ppm liquefied petroleum gas, NH3, H2, and CO was smaller, and ranged from 2.5 to 5.3. This indicates that the coreeshell heterostructures have great potential for use as gas sensing materials.
Hong Thi Bich Truong,Hiep Nghia Bui,Hieu Trung Nguyen,Thanh-Luu Pham,Duy Ngoc Nguyen,Yuan-Shing Perng,Linh Thi My Lam,Thi-Dieu-Hien Vo,Van-Truc Nguyen,Ha Manh Bui 한국화학공학회 2022 Korean Journal of Chemical Engineering Vol.39 No.4
Electron-beam (EB) irradiation was employed to degrade enrofloxacin (ENR) in an aqueous solution. Thealgal growth inhibition test revealed that ENR exhibited low toxicity against the cyanobacterium Arthrospira sp., with anEC50-96 h value of 5.17mg/L. The Taguchi design also involved finding the best optimum for ENR treatment using EB. Results revealed that the high-efficiency removal of ENR in an aqueous solution was approximately 98.53% under theoptimum conditions of an absorbed dose of 5 kGy, a pH of 5.0, and an initial ENR concentration of 10 mg/L and anH2O2 concentration of 2mM. The ERR degradation under a couple of EB irradiation and H2O2 followed pseudo-firstorderkinetics, with an R2 of ~0.970. The major degradation pathways of ENR were suggested by density functional theory,natural bond orbital calculations, and liquid chromatography-tandem mass spectrometry (LC/MS/MS) analysis. Lifecycle assessment (LCA) was also performed to evaluate the impact of the EB on removing ENR; the industrial processwas designed based on laboratory tests aimed with the ReCiPe tool. The obtained results indicated that energy consumptionand H2O2 affect environmental impacts with order human health, ecology systems, and natural resource. The LCAalso proved that EB could be a green and efficient method for eliminating pharmaceutical contaminants in water.