Tài liệu, tai lieu

Particulate silver coating on 316l stainless steel for biomedical implants - Ly Pham Thi
This article studied on the fabrication of the silver plating with the technical parameters as follows: AgNO3 solution had the concentration of 0.05 M and 0.275 M; current density was in the range of 0.05 ÷ 0.5 A/dm2, plating time varied from 1 to 10 minutes, heat treatment was at 500 oC for 15 minutes. The SEM images showed that the silver coa...
8 trang | Chia sẻ: honghp95 | Ngày: 02/12/2020 | Lượt xem: 835 | Lượt tải: 0
Evaluation of the anticorrosion of waterborne epoxy coatings containing cerium salt-Activated ceria nanoparticles deposited onto carbon steel substrate - Anh Son Nguyen
In this study, the effect of cerium (III) ions activated CeO2 nanoparticles on the corrosion protection properties of the epoxy waterborne coating was investigated. The comparison between the pigments (activated nanoparticles, Ce(NO3)3 and CeO2) was also realized. The activated nanoparticles showed a better dispersion in the epoxy matrix than th...
8 trang | Chia sẻ: honghp95 | Ngày: 02/12/2020 | Lượt xem: 810 | Lượt tải: 0
Synthesis of copper-Based nanoparticle catalysts by different methods for total oxidation of vocs - T. Le Minh
Figure 5 shows the catalytic activity for the n-butanol and toluene oxidation in the gas phase of the three catalysts. The results indicated that CuO/ -Al2O3 catalysts present high activity in the reaction of toluene and n-butanol. At 300 °C total conversion is reached. The catalytic activity of Cu-NTP catalyst is the best conversion for toluene...
7 trang | Chia sẻ: honghp95 | Ngày: 02/12/2020 | Lượt xem: 844 | Lượt tải: 0
Effect of caco3 filler on the degradation of high density polyethylene (hdpe) film containing prooxidants - Pham Thu Trang
The degradation of HDPE films containing CaCO3 and prooxidant additves was studies by accelerated weathering test. CaCO3 filler retards the degradation of HDPE films containing prooxidants by prolonging the induction phase of the degradation of HDPE films but they don’t affect to the mechanisms of degradation. FTIR spectra of HD103, HD203 films ...
8 trang | Chia sẻ: honghp95 | Ngày: 02/12/2020 | Lượt xem: 737 | Lượt tải: 0
Extraction of chondroitin sulfate from chicken keel cartilage by combined applicationof ultrasound treatment and alcalase hydrolysis - Truong Ngoc Thao
By the combined application of ultrasound treatment and enzymatic hydrolysis with Alcalase, chondroitin sulfate (CS) was extracted from chicken keel cartilage with high yields. At the optimal conditions found for the ultrasound treatment by using Circumscribed Central Composite design and Modde 5.0 software, the yield of CS was 24.29 % of the ab...
11 trang | Chia sẻ: honghp95 | Ngày: 02/12/2020 | Lượt xem: 940 | Lượt tải: 0
Synthesis of phenothiazine derivatives as novel moieties toward utilization in alternative donor – acceptor conjugated polymers - Truong Tung Khuong
Two new phenothiazine derivatives, PDA and PyP, have been successfully synthesized via Buchwald-Hartwig C-N coupling amination with the present of catalytic palladium. The chemical structures of these products were analyzed by 1H NMR spectra while light absorption properties were characterized via UV – Vis spectroscopy in a series of different c...
7 trang | Chia sẻ: honghp95 | Ngày: 02/12/2020 | Lượt xem: 758 | Lượt tải: 0
Cholestane-Type steroids from the octocoral verrucella corona - Ninh Thi Ngoc
Three cholestane-type steroids, (22E)-cholesta-5,22-dien-3β-ol-7-one (1), trans-liagosterol (2), and guggulsterol-II (3), were isolated and structurally elucidated from methanol extract of the Vietnamese octocoral Verrucella corona. Among them, compound 2 showed significant cytotoxicity against eight human cancer cell lines as HepG2, HL-60, KB, ...
7 trang | Chia sẻ: honghp95 | Ngày: 02/12/2020 | Lượt xem: 685 | Lượt tải: 0
The protective effect of some extracts and isolated compounds from euphorbia hirta on pancreatic β-Cells min6 - 1, 2, Le Tien Dung3, *, Nguyen Trong Tuan1, Nguyen Quoc Chau Thanh
The cell-protective effects of crude ethanol extract and some fractioned extracts as well as some isolated compounds from Euphorbia hirta L. collected in the Mekong Delta on ER stressinduced cell death in mouse β-cell lines were investigated. The results of this study revealed that methanol extract and quercitrin isolated from Euphorbia hirta L. ...
8 trang | Chia sẻ: honghp95 | Ngày: 02/12/2020 | Lượt xem: 805 | Lượt tải: 0
$Chemical constituents of the ethyl acetate fraction of the fruit bodies of phellinus gilvus - Do Xuan Hung$ Chemical constituents of the ethyl acetate fraction of the fruit bodies of phellinus gilvus - Do Xuan Hung
The 1H NMR spectrum of compound 4 has signals for the trans-double bond with big coupling constant (H-2, H-3, J = 16.5 Hz) and three aromatic protons, together with one methyl group. The methyl group has HMBC correlation with C-1 (199.1 ppm), indicating the presence of CH3CO- partital structure. This moiety is connected with the double bond C2-3...
6 trang | Chia sẻ: honghp95 | Ngày: 02/12/2020 | Lượt xem: 681 | Lượt tải: 0
Nickel-Based multiwalled carbon nanotube composite coatings - Bui Hung Thang
The SEM and EDS results confirmed the presence of CNTs in the Ni-CNTs electrodeposition coating. The fine and uniform grain size as well as the presence of CNTs in the electrodeposition coating improved the mechanical properties of the Ni-CNTs coating compared to the Ni coating. The measurement results showed that the hardness and adhesion of th...
8 trang | Chia sẻ: honghp95 | Ngày: 02/12/2020 | Lượt xem: 789 | Lượt tải: 0

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