Chemical Papers
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Synthesis, characterization, and ethylene oligomerization of three novel dendritic nickel catalysts
Chemical Papers - Tập 71 - Trang 895-904 - 2017
Three dendritic nickel complexes C1–C3 were synthesized from three poly(amido amine) dendrimers, salicylic aldehyde and nickel chloride hexahydrate via Schiff base condensation reaction and coordination reaction. The structures of the dendritic ligands and nickel complexes were characterized by FT-IR, UV, 1H NMR, ESI–MS, and elemental analysis. When activated with aluminum co-catalysts, three comp......
Mass transfer examination in electrodialysis using limiting current measurements
Chemical Papers - Tập 69 - Trang 553-559 - 2017
The impact of electrodialysis module characteristics on mass transfer was examined using the limiting current method. The current-voltage curves of different electrodialysis modules were measured and limiting currents were determined using the derivative method. The mass transfer coefficients were calculated and the parameters of their dependence on linear flow velocity were estimated. From these ......
Thermally stable oligomer—Metal complexes based on oligo-ortho-aminophenol and oligophenylazomethinephenol
Chemical Papers - Tập 60 - Trang 306-310 - 2006
The oligo-ortho-aminophenol was synthesized by the oxidative polycondensation of ortho-aminophenol with air oxygen. The oligophenylazomethinephenol was synthesized by the condensation of aniline with oligosalicylaldehyde. Metal complexes of these oligomers with Cu(II), Co(II), Zn(II), and Ni(II) were synthesized and characterized. Based on the results of thermogravimetric analysis, synthesized oli......
Low-cost composite electrode consisting of graphite, colloidal graphite and montmorillonite with enhanced electrochemical performance for general electroanalytical techniques and device fabrication
Chemical Papers - Tập 78 - Trang 633-643 - 2023
Further advancement of the graphite–clay composite electrodes is an essential necessity, which improves performance, resulting in a better alternative for commercial electrodes. In this respect, a novel composite electrode is fabricated using graphite, colloidal graphite and montmorillonite clay (GCGMMTCE), exhibiting ideal electrode behavior, which results in an improved electrochemical performan......
Zirconium(IV) 4-sulphophenylethyliminobismethylphosphonate as an efficient and reusable catalyst for one-pot synthesis of 3,4-dihydropyrimidones under solvent-free conditions
Chemical Papers - Tập 65 - Trang 829-834 - 2011
Zirconium(IV) 4-sulphophenylethyliminobismethylphosphonate (ZSBEDP) was prepared and characterised by elemental analysis, IR, TG-DSC, and XRD. ZSBEDP was found to be an efficient catalyst for the Biginelli reaction of aromatic aldehyde, ethyl acetoacetate, and urea or thiourea under solvent-free conditions so as to give 3,4-dihydropyrimidones in good to excellent yields. The catalyst can be separa......
Optimization of process conditions for the removal of zinc and lead by ultrafiltration using biopolymer
Chemical Papers - Tập 75 Số 8 - Trang 3723-3737 - 2021
Bioproduction of phenylacetic acid in airlift reactor by immobilized Gluconobacter oxydans
Chemical Papers - Tập 71 - Trang 103-118 - 2016
Phenylacetic acid can be produced from 2-phenylethanol by selective oxidation. This process can be performed using Gluconobacter oxydans immobilized in LentiKats®, polyvinyl alcohol particles with lenticular shape. The biotransformation took place at non-growth conditions in an airlift bioreactor. The goal of this work was to examine the impact of the particles on the hydrodynamics and volumetric ......
1H-NMR profile of mezcal and its distillation fractions using two sample preparation methods: direct analysis and solid-phase extraction
Chemical Papers - Tập 75 - Trang 4249-4259 - 2021
Distillation fractions (head, body, and tail) and mezcal samples were analyzed by proton nuclear magnetic resonance spectroscopy (1H-NMR). Samples were obtained from five rural producers in Oaxaca State, Mexico, where the distilled beverage was produced using as raw material Agave angustifolia, commonly known as “Espadín”. The distillation cuts were done by the producers according to their experie......
Effect of apple pomace powder addition on farinographic properties of wheat dough and biscuits quality
Chemical Papers - Tập 68 - Trang 1059-1065 - 2014
In the present study, dietary fibre rich powders obtained from two apple cultivars (Gala, Golden Delicious) were analysed for their chemical composition and functional properties. Apple powders contained more than 50 mass % of total dietary fibre and showed high values of hydration properties such as water holding (11.73–18.34 g g−1), water retention (11.31–11.68 g g−1) and swelling capacity (7.19......
Synthesis, antiproliferative evaluation, and structure–activity relationships of novel triazole–isoindoline hybrids bearing 3,4,5-trimethoxyphenyl moiety
Chemical Papers - Tập 72 - Trang 651-659 - 2017
As an aspect of our ongoing research on developing novel antiproliferative agents, 31 new triazole–isoindoline hybrids bearing 3,4,5-trimethoxyphenyl moiety were synthesized and evaluated for their antiproliferative activity against four cancer cell lines (HepG2, HeLa, PC-3, and HCT116). Some compounds showed excellent potency, and compared to fluorouracil, the most promising compound 6s exhibited......
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