Chemical Papers
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Development and validation of three colorimetric charge transfer complexes for estimation of fingolimod as an antineoplastic drug in pharmaceutical and biological samples
Chemical Papers - Tập 76 - Trang 6675-6681 - 2022
An inexpensive, simple, sensitive and validated approach is developed for estimation of fingolimod through production of colored charge transfer complexes of fingolimod with different electron acceptor reagents, including a reaction of fingolimod as n-donor with 7,7,8,8-tetracyanoquinodimethane, tetrachloro 1,4-benzoquinone and tetracyanoethylene and as n-acceptors, yielding colored and stable ani...... hiện toàn bộ
Simultaneous analysis of three catecholamines by a kinetic procedure: comparison of prediction performance of several different multivariate calibrations
Chemical Papers - Tập 65 - Trang 782-791 - 2011
A rapid kinetic method for the simultaneous determination of levodopa, dopamine, and dobutamine was examined and developed. It was based on a consecutive reaction of a reduction of Cu(II) to Cu(I) by catecholamines, followed by the complexation of Cu(I) with neocuproine to form a yellow product in an acetic acid-acetate buffer. Spectrophotometric data were recorded at 453 nm (wavelength at the yel...... hiện toàn bộ
Simple selenide-phosphoramidite as chiral ligand for Pd-catalyzed asymmetric allylic alkylation reactions
Chemical Papers - - 2023
Efficient and library-friendly synthesis of 4-N-substituted 6-bromopyrido[2,3-d]pyrimidines under microwave irradiation
Chemical Papers - Tập 72 - Trang 2965-2972 - 2018
In this paper, a novel synthetic method for 4-N-substituted 6-bromopyrido[2,3-d]pyrimidines was reported. Starting from 2-aminonicotinonitrile, following by bromination of aromatic ring, condensation, cyclization, and Dimroth rearrangement, a series of 21 new pyrido[2,3-d]pyrimidine derivatives was prepared in high yields (up to 98%). In the last two steps, microwave irradiation was used. The stru...... hiện toàn bộ
Tối ưu hóa điều kiện công nghệ và nghiên cứu động lực học trong việc sản xuất mangan(III) hòa tan trong H2SO4 Dịch bởi AI
Chemical Papers - Tập 73 - Trang 821-831 - 2018
Dung dịch mangan ba giá hòa tan có thể được sử dụng làm điện phân cho pin dòng chảy redox mangan (MRFB), nhờ vào chi phí thấp, thân thiện với môi trường và nhiều trạng thái sạc. Tuy nhiên, sự ổn định kém của dung dịch mangan ba giá hòa tan và nồng độ mangan ba giá thấp là những nhược điểm của điện phân. Để tối ưu hóa độ ổn định và độ dẫn điện của dung dịch mangan ba giá hòa tan, nồng độ axit sulfu...... hiện toàn bộ
#Mangan ba giá hòa tan #điện phân #pin dòng chảy redox mangan #động lực học điện hóa #axit sulfuric
Deciphering the interaction of galactomannan polysaccharide guar gum and bile salt sodium deoxycholate
Chemical Papers - Tập 77 - Trang 6147-6157 - 2023
The interaction study of water-soluble galactomannan polysaccharide guar gum (GG) and biosurfactant bile salt may have implications in lipid digestion and food formulations. In this work, we have tried to bring almost all fundamental aspects of the interaction of guar gum and bile salt sodium deoxycholate (NaDC), and the physicochemical properties allied with their association. The critical aggreg...... hiện toàn bộ
Performance of the novel corrosion inhibitor based on Cetamine to protect mild steel in surface water solution: electrochemical and surface studies
Chemical Papers - - 2021
Properties of poly(lactic acid-co-glycolic acid) film modified by blending with polyurethane
Chemical Papers - Tập 68 - Trang 246-252 - 2013
A number of poly(lactic acid-co-glycolic acid)/polyurethane (PLGA/PU) blend films with various PU mole contents were prepared by casting the polymer blend solution in chloroform. The surface morphologies of the PLGA/PU blend films were studied by scanning electron microscopy (SEM). The thermal, mechanical and chemical properties of the PLGA/PU blend films were investigated by differential scanning...... hiện toàn bộ
Enantioselective extraction of mandelic acid enantiomers by L-dipentyl tartrate and β-cyclodextrin as binary chiral selectors
Chemical Papers - Tập 61 - Trang 326-328 - 2007
A new binary chiral selector system effective for the enantioselective extraction of racemic mandelic acid is presented. While L-dipentyl tartrate and β-cyclodextrin had a very low enantioselectivity as single selectors, a preferential extraction of D-mandelic acid to the organic phase was found in the binary selector system. Using decanol as organic solvent and pH of a phoshate buffer equal to 2....... hiện toàn bộ
Mechanism of photocatalytic oxidation of gaseous ethanol
Chemical Papers - Tập 61 - Trang 51-54 - 2007
A photocatalytic film reactor with a titanium dioxide film was used for oxidation of gaseous ethanol at 253.7 nm. The influences of partial pressures of oxygen and water vapour in different carrier gases were studied. The rate of photocatalytic oxidation of ethanol was significantly affected by the content of oxygen but water vapour had no effect. It was suggested that the photocatalytic transform...... hiện toàn bộ
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