Đồ án, luận văn, do an, luan van

Morphology and properties of polybutylene succinic and cassava starch blend: Effect of esterification catalysts on graft copolymer formation
The purpose of this research is to produce of esterified thermoplastic starch (ETPS) for reactive extrusion meltblending with polybutylene succinate (PBS) in film blowing application. Esterification TPS named M-TPS and T-TPS were prepared from cassava starch, glycerol (plasticizer), and maleic anhydride (MA), tartaric acid (TA) as reactive compat...
8 trang | Chia sẻ: thuyduongbt11 | Ngày: 17/06/2022 | Lượt xem: 514 | Lượt tải: 0
Effect of different polarity solvents on the anti-inflammatory activity of Symplocos cochinchinensis leaves and correlation with total polyphenol content
Symplocos cochinchinensis leaves known as Vietnamese traditional herbal medicines which have been utilized anciently to support the medication of infirmities. The study aimed to explore the correlation of total polyphenol content (TPC) with anti-inflammatory activity of S. cochinchinensis leaves. S. cochinchinensis leaf extracts (ethanol extract,...
9 trang | Chia sẻ: thuyduongbt11 | Ngày: 17/06/2022 | Lượt xem: 513 | Lượt tải: 0
SERS chemical enhancement by copper - Nanostructures: Theoretical study of Thiram pesticide adsorbed on Cu₂₀ cluster
Surface-enhanced Raman spectroscopy (SERS), a surface-sensitive technique, allows the practicability of detecting chemical compounds in ultra-low concentration. In this work, a chemical enhancement mechanism of SER process of Thiram pesticide adsorbed on copper nanomaterial surface was proposed based on density functional theory (DFT) approaches...
8 trang | Chia sẻ: thuyduongbt11 | Ngày: 17/06/2022 | Lượt xem: 418 | Lượt tải: 0
Flavonoids and phenolics from the wholeplant of Macrosolen bidoupensis Tangane & V.S. Dang
Five 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: 384 | Lượt tải: 0
An efficient synthesis, characterization and docking studies of 2-methoxy-3-(1-substituted-1H-pyrazol-3-yl)quinoxalines
Quinoxaline 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: 804 | Lượt tải: 0
Highly efficient transfer hydrogenation of carbonyl compounds over supported nickel and palladium nanoparticles
In 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: 523 | Lượt tải: 0
Solar light-driven photocatalyst-enzyme attached artificial photosynthetic system for regeneration and production of 1,4-NADH and L-glutamate
In 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: 401 | Lượt tải: 0
Adsorption of Ag⁺ ions using hydroxyapatite powder and recovery silver by electrodeposition
Nowadays, 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: 889 | Lượt tải: 0
Occurrence of perfluorinated chemicals (PFCs) in leachate, surface water and sediment collected from Tay Mo landfill and surrounding areas
The 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: 449 | Lượt tải: 0
Acetylcholinesterase sensor based on PANi/rGO film electrochemically grown on screen-printed electrodes
In 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: 912 | Lượt tải: 0