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Methoxyflavones from orthosiphon stamineus and their ptp1b inhibitory activities - Hoang Duc ThuanUsing combined chromatographic and spectroscopic methods, four flavones including 5- hydroxy-3,7,3',4'-tetramethoxyflavone (1), 3,5,7,3′,4′-pentamethoxyflavone (2), 3,5,3′- trihydroxy-7,4′-dimethoxyflavone (3), and 3,3′-dihydroxy-5,7,4′-trimethoxyflavone (4) were isolated and structurally identified from the methanol extract of the aerial parts ...
7 trang | Chia sẻ: honghp95 | Ngày: 02/12/2020 | Lượt xem: 747 | Lượt tải: 0
High protection performance of coating systems based on zinc rich primer and fluoropolymer coating - Vu Ke OanhCoatings systems with primer coatings based on inorganic zinc coatings and topcoat based on fluoropolymer, high-build fluoropolymer and polyurethane were tested by exposure at Ha Noi, Ha Long and Nha Trang stations. Gloss retention and electrochemical measurement were used for evaluating the protection performance of exposed coated steel panels....
7 trang | Chia sẻ: honghp95 | Ngày: 02/12/2020 | Lượt xem: 929 | Lượt tải: 0
The role of counter anions in anticorrosive properties of silica-Polypyrrole composite - Vu Thi Hai VanThe protection performance of PVB coating containing silica/polypyrrole composites with different counter anions (dodecyl sulfate, oxalate and benzoate) was investigated by electrochemical characterizations. It was shown that the presence of counter anion significantly enhanced the effect of SiO2/PPy on protection performance of PVB coatings for...
13 trang | Chia sẻ: honghp95 | Ngày: 02/12/2020 | Lượt xem: 1358 | Lượt tải: 0
Influence of graphene oxide on the corrosion inhibition effect of hydrotalcite loaded with 2-Benzothiazolythio-succinic acid - Thuy Duong NguyenHydrotalcite loaded 2-benzothiazolylthio-succinic acid and graphene oxide (HTCBSA/GO) with BSA content of 19.7 wt% was prepared. The BSA release from HTC-BSA/GO depended on chloride concentrations. After 72 h of immersion, the BSA release was 19.3 % and 61.0 % for 0.1 M and 0.5 M NaCl solutions, respectively. The presence of HTC-BSA/GO at 1 wt% ...
8 trang | Chia sẻ: honghp95 | Ngày: 02/12/2020 | Lượt xem: 1076 | Lượt tải: 0
Modeling of essential oil extraction process: application for orange, pomelo, and lemongrass - Nguyen Dang Binh ThanhKinetics of theessential oil extraction from different plants (sweet orange, pomelo, and lemongrass) using steam distillation were developed on the basis of semi-theoretical models. The results showed that all models selected are in a good agreement with experimental data. Howerver, the Patriicelli model, in which both washing and desorption ste...
8 trang | Chia sẻ: honghp95 | Ngày: 02/12/2020 | Lượt xem: 1062 | Lượt tải: 0
Fatty acid profile and nutrition values of the microalga (thalassiosira pseudonana) used in white shrimp culture - Nguyen Van CongThis study found that: The microalgal species T. pseudonana under our experimental condition exhibited high lipid content (20.8 % of dry cell weight), high levels of saturated fatty acids (42.5 % of total fatty acids with hexadecanoic acid – 38.0 %) and polyunsaturated fatty acids (42.4 % with EPA - 16.4 % and DHA - 1.6 %), and low levels of mo...
8 trang | Chia sẻ: honghp95 | Ngày: 02/12/2020 | Lượt xem: 1023 | Lượt tải: 0
Synthesis of eva-G-ma and its effects on tensile properties and morphology of ethylene vinyl acetate copolymer/bamboo flour and polypropylene/ bamboo flour composites - Mai Duc HuynhGraft copolymer EVA-g-MA was successfully produced by melt mixing with the highest content MA grafted on EVA reaching 1.16 wt.%. The presence of MA improved the interaction between EVA-g-MA and BF, thus, enhanced tensile properties of EVA-g-MA/BF composites. The addition of EVA-g-MA into EVA/BF and PP/BF composites formed the good adhesion at t...
10 trang | Chia sẻ: honghp95 | Ngày: 02/12/2020 | Lượt xem: 869 | Lượt tải: 0
Preparation of magnetic antibacterial composite beads fe3o4/alginate/ag - Le Thi Thu HaIn this work, we synthesized and characterized the magnetic composite beads Fe3O4/alginate/Ag of the size about 1-2 mm, with the large Ag content (24.62 wt.%). The asprepared material has a high saturation magnetization value, Ms = 59 emu/g, and very good antibacterial activity against both gram (-) and gram (+) bacteria. With the concentration 3...
7 trang | Chia sẻ: honghp95 | Ngày: 02/12/2020 | Lượt xem: 839 | Lượt tải: 0
Investigation of the condition to synthesize hap/cnts coatings on 316lss - Nguyen Thi ThomIn this work, the optimal conditions to synthesize HAp/CNTs/316L SS were reported. The XRD results confirmed the crystallinity of the obtained HAp/CNTs coatings with the signals corresponding to the single phase of HAp at 2 = 31.77o and CNTs at 2 = 26.3o, with 6.95 % of CNTs in the coatings. The crystallinity and the composition of the coatings ...
13 trang | Chia sẻ: honghp95 | Ngày: 02/12/2020 | Lượt xem: 953 | Lượt tải: 0
Investigation in loading 5-Fluorouracil ability of iron-organic frameworks - Hoai Phuong Nguyen ThiThe results of the cytotoxicity test show that the MCF7 cells inhibitory capacity of different systems is different. As time increases, the inhibitory capacity on the cancer cells of all materials increases. However, this increase from the material is different. This result is related to the slow release of drugs from the carrier materials. The ...
9 trang | Chia sẻ: honghp95 | Ngày: 02/12/2020 | Lượt xem: 765 | Lượt tải: 0
