Bond dissociation enthalpies in benzene derivatives and effect of substituents: an overview of density functional theory (B3LYP) based computational approachp today, computational chemistry has evolved into a powerful tool to be used to study in many areas. In this review, the computational quantum chemical methods based on B3LYP functional have been applied to determine the bond dissociation enthalpies of a variety of substituted benzenes derivatives. In searching for suitable methods to be use...
13 trang | Chia sẻ: honghp95 | Ngày: 01/12/2020 | Lượt xem: 809 | Lượt tải: 0
Natural rubber nanocomposites - Bui ChuongNR nanocomposites with two kinds of nanofillers: organic (nanocellulose) and inorganic (silica, nanoclay) were introduced. They may be prepared by mean of all methods for polymer nanocomposite preparation. However, the most promising for industrial use are mixing in latex and melt compounding technique. The most important in NR nanocomposite...
16 trang | Chia sẻ: honghp95 | Ngày: 01/12/2020 | Lượt xem: 825 | Lượt tải: 0
Status of manure generation and management practice in household pig farming in Ha Hoa district, phu tho province, Viet Nam - Pham Thi Mai ThaoIn Ha Hoa district, the weight of manure generated depended on the amount of feed per day. The average manure discharge was 0.99 kg/day (including manure generated by piglets) and 1.3 kg/day (excluding manure generated by piglets). The total of pig manure generated in the whole district of Ha Hoa was 80.7 ton/day. For the households with less th...
11 trang | Chia sẻ: honghp95 | Ngày: 01/12/2020 | Lượt xem: 833 | Lượt tải: 0
Nanocurcumin and chitosan-Pluronic f127-based hydrogel for 3rd degree burn treatment - Dinh Van TuanAfter 7 days burned, all three treated groups were found to be not different by the external morphology. From day 7 to day 12, the morphology of 3 treatment groups was changed. The area of the wound had significant changes, especially in group treatment by nCur-CP that decreased from 82.2 ± 17.35 mm2to 12.2 ± 4.9 mm2 (p < 0.05). After 20 days of...
10 trang | Chia sẻ: honghp95 | Ngày: 01/12/2020 | Lượt xem: 909 | Lượt tải: 0
Synthesis, characterization and electrochemical performance of activated carbon supported mno2 for electrochemical capacitor - Luong Thi Thu ThuyThe MnAC samples were successfully prepared via magnetic stirring and ultrasonic stirring methods. The resulted samples are amorphous structure with 32~42% MnO2 loading. The magnetic stirring prepared sample has spherical particles while ultrasonic stirring sample has mixed spherical and rod-like particle. The introducing of manganese oxide resu...
12 trang | Chia sẻ: honghp95 | Ngày: 01/12/2020 | Lượt xem: 972 | Lượt tải: 0
Preparation and characterization of magnesium hydroxyapatite coatings on 316L stainless steel - Vo Thi HanhMgHAp coatings have been successfully synthesized on 316L SS substrate by the electrodeposition method. The optimal conditions were chosen to deposite MgHAp coatings. The obtained MgHAp has single phase crystals of HAp, fibrous shape and the content of 0.2 wt% Mg and 1.2 wt% Na similar to natural bone which could be improved mechanical prope...
6 trang | Chia sẻ: honghp95 | Ngày: 01/12/2020 | Lượt xem: 706 | Lượt tải: 0
PTP1B inhibitory flavonols from Orthosiphon stamineus Benth - Nguyen Phi HungUsing combined chromatographic and spectroscopic methods, three flavonols including 5,7,3’,4’- tetramethylquercetin (1), 3’-hydroxy-3,5,7,4’- tetramethoxyflavone (2), and 3,5-dihydroxy-7,3',4'- trimethoxyflavone (3) were isolated and structurally identified from the methanol extract of the aerial parts of O. stamineus Benth. All of the isolat...
5 trang | Chia sẻ: honghp95 | Ngày: 01/12/2020 | Lượt xem: 930 | Lượt tải: 0
Elucidating the chemical state of elements in CaO-CuO-CeO2 mixed oxide by X-ray photoelectron spectroscopyThree-component-oxide CaO-CuO-CeO2 was successfully fabricated via the sol-gel method. XRD result showed the single phase of CeO2 when the contents of Cu and Ca was kept below 15 and 7.5 mol.%, respectively. The material fabricated at aging temperature of 70 oC, calcination at 600 oC for 30 min possessed the highest phenol conversion (96.3 %...
7 trang | Chia sẻ: honghp95 | Ngày: 01/12/2020 | Lượt xem: 703 | Lượt tải: 0
Influence of operating conditions and membrane fouling on water flux during seawater desalination using air gap membrane distillation - Duong Cong HungResults from this study demonstrate the great viability of seawater AGMD desalination for fresh water provision in remote coastal areas in Vietnam. During the AGMD process of seawater, the operating conditions, particularly feed temperature and circulation rate, strongly affected the process water flux. Operating the process at high feed tem...
7 trang | Chia sẻ: honghp95 | Ngày: 01/12/2020 | Lượt xem: 810 | Lượt tải: 0
Study on the effect of carbon black, carbon nanotube on the properties of rubber blend acrylonitrile butadiene rubber (NBR)/polyvinyl chloride (PVC) - Luong Nhu HaiThe thermal stability of the material is evaluated by Thermogravimetric Analysis (TGA). The results of TGA analysis of material samples based on NBR/PVC blend are shown in figures 6-8 and table 3. When replacing 1 phr CB by CNT, thermal stability of the rubber blend continues to rise (onset decomposition temperature increased by nearly 10°C)...
6 trang | Chia sẻ: honghp95 | Ngày: 01/12/2020 | Lượt xem: 755 | Lượt tải: 0
