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Using a central composite design to optimize the analytical method for simultaneous determination of choline, pantothenic acid, ascorbic acid, and niacin in food supplements by capillary zone electrophoresis
Abstract. This study focused on using a central composite design (CCD) to optimize the analytical method for simultaneous determination of choline, pantothenic acid (vitamin B5), ascorbic acid (vitamin C), and niacin (vitamin B3) by capillary zone electrophoresis (CZE). The optimization process was designed with 30 experiments, including four f...
10 trang | Chia sẻ: thanhle95 | Ngày: 07/07/2021 | Lượt xem: 568 | Lượt tải: 0
The interaction between K[PtCl3(Isopropyl eugenoxyacetate)] with pyridine’s derivatives
Abstract. The interactions of K[PtCl3(iPrEug)] (1) with either 2-aminopyridine (NH2Py) or 2-(aminomethyl)pyridine (NH2CH2Py) have been studied for the first time. The structures of obtained complexes, namely trans-[PtCl2(iPrEug)(NH2Py)] (2) and a mixture of [PtCl2(NH2CH2Py)] (3A) and trans-[PtCl2(NH2CH2Py)2] (3B), were determined by means of pl...
8 trang | Chia sẻ: thanhle95 | Ngày: 07/07/2021 | Lượt xem: 650 | Lượt tải: 0
Synthesis of some derivatives containing both benzothiazole and benzoxazin-3-one
Abstract. Reaction of ethyl monochloro acetate and o-aminophenol derivatives gave two new benzo[b][1,4]oxazin-3(4H)-one containing benzo[d]thiazole ring with 2 methods in high yield. Structures of two benzo[b][1,4]oxazin-3(4H)-one based derivatives were elucidated with IR, 1D NMR, 2D NMR and MS spectra.
8 trang | Chia sẻ: thanhle95 | Ngày: 07/07/2021 | Lượt xem: 589 | Lượt tải: 0
A short, effective protocol for Shciff base synthesis using microwave
Abstract. Both nitration of vanillin and condensation of 5-nitrovanilllin with aniline derivatives were accelerated by using microwave oven. The nitration gave 5-nitrovanillin in 80% yield and the condensation gave twelve Schiff bases in excellent yield (80 - 97%) within short reaction time (4 - 10 min) along with other advantages like mild rea...
8 trang | Chia sẻ: thanhle95 | Ngày: 07/07/2021 | Lượt xem: 570 | Lượt tải: 0
Fourier cosine-laplace generalized convolution inequalities and applications
Abstract. We introduce several weighted Lp(R+)-norm inequalities and integral transform related to the generalized convolution with a weight function for the Fourier cosine and Laplace transforms. Some applications of these inequalities to estimate the solutions of some partial differential equations are considered. We also obtained solutions of...
14 trang | Chia sẻ: thanhle95 | Ngày: 07/07/2021 | Lượt xem: 448 | Lượt tải: 0
Preliminary investigation of CO2 sequestration by Chlorella sorokiniana TH01 in single and sequential photobioreactors
Abstract: Increasing accumulation of CO2 in the atmosphere mainly caused by fossil fuels combustion of human activities have resulted in adverse global warming. Therefore, searching for treatment methods for effective utilization of CO2 have received a great attention worldwide. Among various methods (e.g., adsorption, absorption, storage, membr...
13 trang | Chia sẻ: thanhle95 | Ngày: 07/07/2021 | Lượt xem: 623 | Lượt tải: 0
Bioaccumulation of polycyclic aromatic hydrocarbons (PAHs) in Green Mussels (Perna viridis) from Cangio Area, Hochiminh city
Abstract: The bioaccumulation of polycyclic aromatic hydrocarbons (PAHs) in bivalves of the coastal estuary has been investigated since they are favorable seafood. In the present study, the distribution of PAHs was determined in the green mussels (Perna viridis) from Cangio area (Ho Chi Minh City). Global comparison showed a lower PAHs accumulat...
8 trang | Chia sẻ: thanhle95 | Ngày: 07/07/2021 | Lượt xem: 595 | Lượt tải: 0
Evaluation on the stability of amine-mesoporous silica adsorbents used for CO2 capture
Abstract: Amine-mesoporous silica has been considered as a promising CO2 adsorbent with high potential for the reduction of energy consumption and CO2 capture cost; however, its stability could greatly vary with synthetic method. In this study, adsorbents prepared by impregnating different amines including polyethylenimine (PEI) and 3-aminopropy...
8 trang | Chia sẻ: thanhle95 | Ngày: 07/07/2021 | Lượt xem: 555 | Lượt tải: 0
Anti-Microbial activities of two Platinum(II) complexes bearing ethyl eugenoxyacetate and synthesis, structure of [PtCl(ethyl eugenoxyacetate-1H)(morpholine)]
Abstract: Two organo-metallic complexes of platinum(II), [PtCl(Eteug-1H)(C9H7N)] (P1), [Pt(Eteug-1H)(OC9H6N)] (P2), have been experimented on anti-microbial activity for the first time. P1 has activity against L.fermentum and B.subtilis bacterias with the IC50 values of 165.05, 220.58 µg/mL, respectively, P2 exhibits higher cytotoxicity on B.sub...
8 trang | Chia sẻ: thanhle95 | Ngày: 07/07/2021 | Lượt xem: 497 | Lượt tải: 0
Study on the chemical composition, Biological activity and Physico-Chemical indicators of the weft-peel oil of Bac Giang oranges extracted by cold-pressing method
Abstract: The oil of Bac Giang orange weft peels were obtained by cold-pressing method and dried with Na2SO4. By using the GC-MS method, 33 components of the oil were estimated by comparing their retention times and molecular weights with the standards. In particular, there were 15 hydrocarbons such as monoterpenes: 53.51%, sesquiterpenes: 7.19%...
7 trang | Chia sẻ: thanhle95 | Ngày: 07/07/2021 | Lượt xem: 676 | Lượt tải: 0

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