Flavonoids and phenolics from the wholeplant of Macrosolen bidoupensis Tangane & V.S. DangFive flavonoids, including quercetin (1) and four its derivatives, quercitrin (2), isoquercitrin (3), astibin (4), and rutin (5), together with two phenolic glycosides, 3,3′-di-O-methylellagic acid 4-O-β-D-xylopyranoside (6), and aesculin (7) were isolated from the whole plants of Macrosolen bidoupensis Tangane & V.S. Dang. Their chemical structu...
5 trang | Chia sẻ: thuyduongbt11 | Ngày: 17/06/2022 | Lượt xem: 330 | Lượt tải: 0
An efficient synthesis, characterization and docking studies of 2-methoxy-3-(1-substituted-1H-pyrazol-3-yl)quinoxalinesQuinoxaline subsidiaries are a significant class of nitrogen-containing heterocycles, as they establish helpful intermediates in organic synthesis. This substructure plays a significant role as an essential skeleton for the plan of various heterocyclic compounds with various biological activities, hence thesecompounds significant in the field...
6 trang | Chia sẻ: thuyduongbt11 | Ngày: 17/06/2022 | Lượt xem: 763 | Lượt tải: 0
Highly efficient transfer hydrogenation of carbonyl compounds over supported nickel and palladium nanoparticlesIn this work, metal nanoparticles were successfully synthesized through the reduction of metal salts using reducing agents such as: ethylene glycol (EG) and sodium borohydride (NaBH4). These metal nanoparticles were impregnated into the supports M-X (M = Ni, Pd; X = Bent, C, Zeolite, and Al2O3) in high yield. The physio-chemical properties of th...
6 trang | Chia sẻ: thuyduongbt11 | Ngày: 17/06/2022 | Lượt xem: 475 | Lượt tải: 0
Solar light-driven photocatalyst-enzyme attached artificial photosynthetic system for regeneration and production of 1,4-NADH and L-glutamateIn artificial photosynthesis process the photocatalyst-enzyme attached system is a best strategy to utilize solar energy for solar chemical/fuels production. Herein, we prepared a solar light active graphene-based photocatalyst received by the covalent attachment of 9-aminoanthracene (AA) chromophore with chemically converted graphene (CCG) for ...
5 trang | Chia sẻ: thuyduongbt11 | Ngày: 17/06/2022 | Lượt xem: 334 | Lượt tải: 0
Adsorption of Ag⁺ ions using hydroxyapatite powder and recovery silver by electrodepositionNowadays, waste of electrical and electronic apparatuses generated in huge amount surround the earth and has become a global environmental issue. Electronic waste contains large amounts of metal ions, such as Au, Ag, Cu, Pd, Pb and Cd etc., resulting in a threat to the environment, ecosystems and human health. Therefore, removal of metal ions an...
8 trang | Chia sẻ: thuyduongbt11 | Ngày: 17/06/2022 | Lượt xem: 839 | Lượt tải: 0
Occurrence of perfluorinated chemicals (PFCs) in leachate, surface water and sediment collected from Tay Mo landfill and surrounding areasThe municipal landfill is considered to be a potential source of different environmental contaminants derived from consumer goods, including perfluorinated chemicals (PFCs). Twenty-four leachate, surface water samples and twentyfour sediment samples collected at Tay Mo landfill (Hanoi, Vietnam) and surrounding areas were analysed for sixteen PFCs...
8 trang | Chia sẻ: thuyduongbt11 | Ngày: 17/06/2022 | Lượt xem: 397 | Lượt tải: 0
Acetylcholinesterase sensor based on PANi/rGO film electrochemically grown on screen-printed electrodesIn this work, the polyaniline/reduced graphene oxide (PANi/rGO) bilayer was directly electrodeposited on carbon screen-printed electrodes (SPE). Some details in growth of PANi/rGO bilayer were revealed from cyclic voltammograms and X-ray photoelectron spectra. The growth of stacked rGO film at high compactness on the electrode surface is mainly ...
10 trang | Chia sẻ: thuyduongbt11 | Ngày: 17/06/2022 | Lượt xem: 857 | Lượt tải: 0
Effect of epoxydized carbon nanotube master batch on polypropylene film propertiesFirst, the surface of carbon nanotubes (CNTs) was modified by epoxidation reaction to create epoxidized CNTs (O
7 trang | Chia sẻ: thuyduongbt11 | Ngày: 17/06/2022 | Lượt xem: 323 | Lượt tải: 0
Diterpenoids from Rosmarinus officinalis L. and their nitric oxide inhibitory activityOne icetexane diterpenoid, demethylsalvicanol (1) and four abietane diterpenoids, sageone (2), 20-deoxocarnosol (3), 11,12,20-trihydroxy-abieta-8,11,13-triene (4), and 7α-ethoxyrosmanol (5) were isolated from the n-hexane layer of the leaves and twigs of Rosmarinus officinalis L. Chemical structures of compounds were identified by ESI-MS, 1D-, 2...
6 trang | Chia sẻ: thuyduongbt11 | Ngày: 17/06/2022 | Lượt xem: 324 | Lượt tải: 0
Lignans from the stems of Clerodendrum inerme GaertnThe polar constituents of Clerodendrum inerme collected from coastal area of Thai Binh province were investigated. From the water soluble fraction of the C. inerme stems, four lignan and lignan glucosides (1-4) along with a phenolic glucoside (5) were isolated. Their chemical structures were established as icariol A2 (1), syringaresinol-4-O- -g...
5 trang | Chia sẻ: thuyduongbt11 | Ngày: 17/06/2022 | Lượt xem: 453 | Lượt tải: 0
