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363 Newest Publications in chemical papers

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Preparation, characterisation, and dielectric properties of polypyrrole-clay composites

27-Nov-2012 | Seyfullah Madakbaş, Emrah Çakmakçı, Memet Vezir Kahraman, Kadir Esmer, Chemical Papers, 2012

In this study, polypyrrole-clay (PPy-clay) composites were prepared by the in situ chemical oxidative polymerisation of pyrrole in the presence of clay. The chemical structures of the composites were characterised by FTIR and XRD analysis. The thermal properties of these novel composites were ...

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Micelle nano-reactors as mediators of water-insoluble ligand complexation with Cu(II) ions in aqueous medium

27-Nov-2012 | Ragıp Adıgüzel, Senay Taşcıoğlu, Chemical Papers, 2012

Complexation reactions between water-soluble and -insoluble reactants were shown to occur in aqueous media in the presence of normal or reverse surfactant micelles, in significantly higher yields at lower temperatures compared to those achieved in neat organic solvents. The highest yield ...

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Design calculations of an extractor for aromatic and aliphatic hydrocarbons separation using ionic liquids

26-Nov-2012 | Elena Graczová, Pavol Steltenpohl, Martin Šoltýs, Tomáš Katriňák, Chemical Papers, 2012

The study concentrates on the separation of aromatic hydrocarbons from aliphatic hydrocarbon mixtures using ionic liquids as a new alternative of extraction solvents. Influence of the phase equilibrium description accuracy on the separation equipment design using different thermodynamic models ...

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Structure and properties of 2-[(E)-2-(4-dipropylaminophenyl)-1-ethenyl]-1,3,3-trimethyl-3H-indolium chloride

26-Nov-2012 | Martina Lešková, Yaroslav R. Bazel, Marcel Torok, Yaroslav Studenyak, Chemical Papers, 2012

The structure of styryl dye, 2-[(E)-2-(4-dipropylaminophenyl)-1-ethenyl]-1,3,3-trimethyl-3H-indolium chloride (I), was investigated using methods such as UV-VIS, fluorescence spectroscopy, and NMR (1H, 13C, APT, HMQC, COSY) and also by examining its electrochemical properties. A study of the ...

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Dynamic shape and wall correction factors of cylindrical particles falling vertically in a Newtonian liquid

26-Nov-2012 | Jaroslav Strnadel, Bedřich Šiška, Ivan Machač, Chemical Papers, 2012

Results of numerical calculations of dynamic shape and wall correction factors for the flow of a Newtonian fluid over a vertically oriented cylindrical particle in a cylindrical tube are reported. Mathematical model of the flow was solved using the finite element method by means of the COMSOL ...

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Synthesis and catalytic performance of MCM-41 modified with tetracarboxylphthalocyanine

26-Nov-2012 | Ya-Ping Zhang, Ke-Chuang Xue, Wei-Ping Zhang, Chao Song, Rong-Lan Zhang, Jian-She Zhao, Chemical Papers, 2012

A series of tetracarboxylphthalocyanines (MPc(COOH)4, M = H, Mn(II), Fe(II), Co(II), Ni(II), Cu(II), and Zn(II)) were anchored onto MCM-41 by the following procedures: functionalization of MCM-41 with (EtO)3SiCH2CH2CH2NH2 reacting with surface Si-OH, and anchoring MPc(COOH)4 onto MCM-41 with a ...

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Modelling of kinetics of microbial degradation of simulated leachate from tobacco dust waste

26-Nov-2012 | Ivana Ćosić, Marija Vuković, Zoran Gomzi, Felicita Briški, Chemical Papers, 2012

This paper presents a kinetic analysis of the biodegradation of organic pollutants in a batch bioreactor and investigates the kinetic properties of activated sludge using different mathematical models. The treatment was conducted for different initial concentrations of leachate from 500 mg dm−3 ...

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Preparation, structural characterisation, and magnetic properties of [Cu(men)2][Cu2Cd2Cl2(CN)6] (men = N-methylethane-1,2-diamine)

26-Nov-2012 | Juraj Kuchár, Juraj Černák, Chemical Papers, 2012

The novel complex [Cu(men)2][Cu2Cd2Cl2(CN)6] (I) was isolated from the aqueous-ethanol system containing CuCl2, men (men = N-methylethane-1,2-diamine) and K2[Cd(CN)4] in the presence of dilute hydrochloric acid and chemically and spectroscopically characterised. The crystal structure of I ...

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Preparation of a new metallomicelle catalyst for the hydrolysis of bis(4-nitrophenyl) phosphate

26-Nov-2012 | Jia-Qing Xie, Ci Li, Min Wang, Bing-Ying Jiang, Chemical Papers, 2012

A new metallomicellar system containing cerium(III), a macrocylic polyamine ligand, and the nonionic surfactant Brij35(polyoxyethylene(23) lauryl ether) was prepared and used as a catalyst in the hydrolysis of bis(4-nitrophenyl) phosphate (BNPP). Catalytic rate of the BNPP hydrolysis was measured ...

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Effects of enzymes and hydrocolloids on physical, sensory, and shelf-life properties of wheat bread

26-Nov-2012 | Łubomír Mikuš, Mária Kováčová, Ladislav Dodok, Alžbeta Medveďová, Lucia Mikušová, Ernest Šturdík, Chemical Papers, 2012

This study compares two types of enzymes: maltogenic amylase (Novamyl 10000 BG) and lipase (Lipopan F BG, Lipopan Xtra BG), both separately and in combination, and seven hydrocolloids (guar gum, xanthan gum, carrageenan, β-glucan, carob gum, and carboxymethyl cellulose (CMC)) on the physical and ...

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