Vietnam Journal of Chemistry

Công bố khoa học tiêu biểu

* Dữ liệu chỉ mang tính chất tham khảo

Sắp xếp:  
Khả năng bảo vệ xúc tác cracking trước sự tác động của kim loại nặng trong nguyên liệu khi sử dụng pha nền hoạt động là kaolin Việt Nam biến tính
Vietnam Journal of Chemistry - Tập 46 Số 1 - 2012
Modern fluid catalytic cracking (FCC) catalysts are composed of crystalline zeolite Y which is surrounded and held together by an amorphous silica/alumina matrix. Matrix contributes significantly to the overall performance of FCC catalysts. Catalyst matrix has many of the functions such as upgrading bottoms, reducing SOx emissions, and passivating catalyst poisons. The catalyst matrix plays an imp... hiện toàn bộ
Diterpenoid mới được phân lập từ cây thuốc giấu Euphorbia tithymaloides (P.).
Vietnam Journal of Chemistry - Tập 54 Số 3 - Trang 274 - 2016
Cầm Thị Ính, Nguyễn Thị Hồng Vân, Phạm Minh Quân, Trần Thị Quỳnh Trang, Trịnh Anh Viên, Nguyễn Thị Thuỷ, Đỗ Thị Thảo
A new compound 1α,13β,14α-trihydroxy-3β-benzoyloxy-7β-methoxy-9β,15β-diacetoxyjatrophan-5,11E-dien (1), and two known compounds poly-O-acylated jatrophan diterpenoids (2, 3) were isolated and identified from Euphorbia tithymaloides (P.). Their structures were elucidated by spectroscopic methods and comparison with the reported data. Compound 1 showed good cytotoxicity against four cancer lines. Ke... hiện toàn bộ
Chemical constituents of the barks of Litsea glutinosa collected in Thai Nguyen province, Vietnam
Vietnam Journal of Chemistry - Tập 53 Số 5 - 2016
From the ethyl acetate extract of the barks of Litsea glutinosa four compounds including cis-5,8,11,14,17-eicosapentaenoic acid methyl ester (1), spatozoate (2), betasitosterol (3) and daucosterol (4) have been isolated. Compound (5) 1-heptadecanol, compound (6) 1-eicosanol and compound (7) glycerol 1,3-di-(9Z,12Z-octadecadienoate) 2-hexadecanoate were isolated from the n-hexane extract. Their str... hiện toàn bộ
#Litsea glutinosa #cis-5 #8 #11 #14 #17-eicosapentaenoic acid methyl ester #spatozoate #betasitosterol #daucosterol #1-heptadecanol #1-eicosanol #glycerol 1 #3-di-(9Z #12Z-octadecadienoate) 2-hexadecanoate
Nghiên cứu các chất quang xúc tác TiO2 được biến tính bằng Fe2O3 bằng phương pháp sol-gel
Vietnam Journal of Chemistry - Tập 47 Số 3 - 2012
Thin layers of pure TiO2 and TiO2 doped by different amounts of Fe2O3 have been prepared by sol-gel method with tetraisopropyl orthotitanate and Fe(NO3)3. Physico-chemical properties of the catalysts were studied by the methods of BET Adsorption, X-ray Diffraction (XRD), FE-SEM, as well as Raman, IR and UV-Vis spectroscopies. Photocatalytic activity of the obtained materials was investigated in th... hiện toàn bộ
Study on the hydrolytic ability of organic component in domestic waste serving for methane recovery technology
Vietnam Journal of Chemistry - Tập 52 Số 2 - Trang 217 - 2014
Nguyen Van Phuoc, Nguyen Thi Thanh Phuong
The organic component in municipal solid waste has been considered as a valuable resource. Recent experimental data showed that organic components in municipal solid waste of Vietnam in general and Ho Chi Minh City in particular produced during anaerobic process are more than 65 %, which is advantage condition for methane recovery in anaerobic reactors. This research focused on the hydrolytic abil... hiện toàn bộ
Comparative studies on the characteristic properties of the ground and conventional LaCo0.7Cu0.3O3 perovskite
Vietnam Journal of Chemistry - Tập 47 Số 4 - 2012
The characteristics of two perovkites and a blend of mixed oxides prepared by reactive grinding and citrate complex method have been comparatively investigated using several techniques (X-ray, BET, H2-TPR, chemisorption, O2-TPD). XRD results confirm the successful substitution of Co by Cu in the lattice of La(Co,Cu)O3 perovkite. The ground materials with smaller particle sizes and larger surface a... hiện toàn bộ
Triterpene from the roots of Codonopsis pilosula.
Vietnam Journal of Chemistry - Tập 46 Số 4 - 2012
From the roots of Codonopsis pilosula (Franch) Nannf (Campanulaceae) five triterpenoids: taraxerol, taraxeryl acetate, 14-a-taraxeran-3-one and D:B-friedoolean-5-ene-3-b-ol as well as a-spinasterone were isolated. Their structures have been identified by MS, 1H-, 13C-NMR spectroscopy and comparison with reported data.
Phenolic glycosides from Antidesma ghaesembilla
Vietnam Journal of Chemistry - Tập 54 Số 2 - Trang 170 - 2016
Le Canh Viet Cuong, Do Thi Trang, Nguyen Xuan Nhiem, Pham Hai Yen, Bui Huu Tai, Hoang Le Tuan Anh, Le Mai Huong, Nguyen Quoc Binh, Chau Van Minh, Phan Van Kiem
Five phenolic glycosides, vanillyl alcohol 4-O-β-D-glucopyranoside, 4-hydroxy-3,5-dimethoxybenzyl-O-β-D-glucopyranoside, 3-hydroxy-4,5-dimethoxyphenyl-O-β-D-glucopyranoside, 3,4,5-trimethoxyphenyl-O-β-D-glucopyranoside, and sinapyl alcohol 4-O-β-D-glucopyranoside (1-5), respectively were isolated from the methanol extract of the Antidesma ghaesembilla leaves. Their structures were elucidated by sp... hiện toàn bộ
#Antidesma ghaesembilla #Euphorbiaceae #phenolic.
Study on the pathways of the reaction of ketenyl radicals and nitrogen dioxide (HCCO+NO2)
Vietnam Journal of Chemistry - Tập 45 Số 2 - 2012
Using the G3B3 method, we constructed the portions of potential energy surface containing low-energy pathways of HCCO + NO2reaction. These show that only two separate reaction pathways are possible leading to HCNO + CO2and HCO + NO + CO.
Nghiên cứu ảnh hưởng của nhiệt độ đến phản ứng khâu mạch nhựa epoxy biến tính dầu đậu nành bằng dianhydrit piromelitic và tính chất của màng khâu mạch
Vietnam Journal of Chemistry - Tập 52 Số 3 - 2014
The influence of the temperature on the crosslinking of soyabean oil modified epoxy resin (ESO) by dianhydrite piromelitic (DAP) in presence of the dimetylbenzylamin (DMBA) has been studied and the optimal conditions for the curing have been determined. It was showed that at the optimal conditions: Equal mol of epoxy and anhydrite groups, reactions temperature and duration 120 oC and 90 min, respe... hiện toàn bộ
Tổng số: 868   
  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 10