Category Archive for "Year 2011 Issue 4"

Immobilization of catalase from Aspergillus niger in calcium alginate gel

Immobilization of catalase from Aspergillus niger in calcium alginate gel Justyna MIŁEK, Sylwia KWIATKOWSKA-MARKS, Marek WÓJCIK - Faculty of Chemical Technology and Engineering, University of Technology and Life Sciences, Bydgoszcz Please cited as: CHEMIK 2011, 65, 4, 305-308 The entrapment of catalase from Aspergillus niger in a gel containing 2% and 4% by weight of calcium alginate was investigated. For the 2% gel, the biocatalyst was observed to gradually lose its activity as catalase was released from the gel pores. A stable biocatalyst with...

Oxychlorination of organic compounds

Oxychlorination of organic compounds Maciej PRZYBYŁEK, Jerzy GACA ? Department of Chemistry and Environmental Protection, Faculty of Chemical Technology and Engineering, University of Technology and Life Sciences, Bydgoszcz Please cited as: CHEMIK 2011, 65, 4, 297-300 In this paper oxychlorination processes were reviewed. We paid special attention to the environmental and ecological aspects of these transformations. Mechanisms of aniline and tert-buthyl ethers oxychlorination were also discussed in detail. Keywords: hydrogen peroxide, hydrogen chloride, chloroorganic compounds Read more:

Investigation of the persistence of metal complex dyes

Investigation of the persistence of metal complex dyes Ewa MAĆKOWSKA ? Faculty of Chemical Technology and Engineering, University of Technology and Life Sciences, Bydgoszcz Please cited as: CHEMIK 2011, 65, 4, 291-296 The paper presents the threats to the environment posed by the expansion of the dye industry and related industries. Oxidizers that can efficiently decolorize dye-containing wastewater are listed. The effects of ozone, hydrogen peroxide, diammonium peroxydisulphate and Fenton?s reagent on the decolorization of aqueous solutions of 1:2 metal complex dyes are discussed. A...

The dyes containing quinoline or quinoxaline skeleton as effective photoinitiators of free radicals polymerization

The dyes containing quinoline or quinoxaline skeleton as effective photoinitiators of free radicals polymerization Ilona PYSZKA, Zdzisław KUCYBAŁA, Grzegorz NIKCZYŃSKI - Faculty of Chemical Technology and Engineering, University of Technology and Life Sciences, Bydgoszcz Please cited as: CHEMIK 2011, 65, 4, 283-290 The series of the dyes possessing quinoline or quinoxaline residue have been investigated as visible - light absorbing photoinitiators of free radical polymerization. The rates of photoinitiation polymerization depend on the structure of the dye. Mechanism of the photoinitiation involves the elektron transfer...

Properties and application of diketones and their derivatives

Properties and application of diketones and their derivatives Włodzimierz Urbaniak, Katarzyna Jurek, Katarzyna Witt , Andrzej Gorączko - Faculty of Chemical Technology and Engineering, University of Technology and Life Sciences, Bydgoszcz; Bartosz Staniszews ki - Faculty of Chemistry, Adam Mickiewicz University, Poznań Please cited as: CHEMIK 2011, 65, 4, 273-282 Within the present research, acetylacetone derivatives have been synthesised and tested using UV-Vis spectrophotometry; the derivatives include: 3-allyl-2,4-pentanedione, 3-benzyl2,4-pentanedione, 3-butyl2,4-pentanedione, benzoylacetone, dibenzoylmethane, 3-methyl2,4-pentanedione, 3-trimethylsilylpropyl-2,4-pentanedione and their Cu(II ) and Co(II ) complex compounds. Furthermore, EI mass spectra...

Chemometric classification of low-resolution spectra of organic iron derivatives

Chemometric classification of low-resolution spectra of organic iron derivatives Ernest K. PUJSZO, Jacek A. SZYMURA, Jan LAMKIEWICZ - Faculty of Chemical Technology and Engineering, University of Technology and Life Sciences, Bydgoszcz; Irena SZYMURA - University of Warmia and Mazury, Olsztyn Please cited as: CHEMIK 2011, 65, 4, 267-272 This work reports the results of chemometric analysis of 33 low-resolution mass spectra of iron organic derivatives performed to accomplish their classification. Two computer programs had been applied, i.e. MassFeatGen (with modified values of spectral features) and...

Silver MPC?s Immobilized Co-initiators for Free Radical Polymerization

Silver MPC?s Immobilized Co-initiators for Free Radical Polymerization Waldemar WIŚNIEWSKI, Grzegorz NIKCZYŃSKI, Franciszek ŚCIGALSKI - Faculty of Chemical Technology and Engineering, University of Technology and Life Sciences, Bydgoszcz Please cited as: CHEMIK 2011, 65, 4, 261-266 In this report, the synthesis and the specific properties of silver nanoparticles (MPCs) immobilized by a number of mercaptoazole derivatives are described. All prepared MPCs were characterized by UV-Vis spectroscopy, FTIR spectroscopy, and TGA measurements. The synthesized nanoparticles were applied as electron donors in photoinduced free radical polymerization,...

Stilbazolium salts as fluorescence probes for monitoring local viscosity and pH of solutions

Stilbazolium salts as fluorescence probes for monitoring local viscosity and pH of solutions Agnieszka BAJOREK, Ilona WRZEŚNIEWSKA, Marek PIETRZAK - Faculty of Chemical Technology and Engineering, University of Technology and Life Sciences, Bydgoszcz Please cited as: CHEMIK 2011, 65, 4, 255-260 A series of p-substituted 2- or 4-styrylquinolinium iodides and 2- or 4- styrylpyridinium iodides were prepared by the condensation of 4-(N,N-dimethylamino)benzaldehyde and 4-(N,N-dimethylamino)- 1-naphthaldehyde with N-substituted picolines and methylquinolinium iodides. Spectroscopic properties of the dyes are characterized in organic solvents. These dyes were then...

Multicationic styrylpyridinium dyes as sensitizers in photoinitiating systems of TMPTA radical polymerization

Multicationic styrylpyridinium dyes as sensitizers in photoinitiating systems of TMPTA radical polymerization Beata Jędrzejewska, Jolanta Kapela - Faculty of Chemical Technology and Engineering, University of Technology and Life Sciences, Bydgoszcz Please cited as: CHEMIK 2011, 65, 4, 249-254 Multicationic styrylpyridinium dyes paired with n-butyltriphenylborate salt are shown to be effective photoinitiators of TMPTA polymerization. Mechanism of the photoinitiation involves n-butyl radicals formed from the heterolytic cleavage of carbon-boron bond that follows the electron transfer process. The capability of the salts to act as initiators for the...

Interpretation of EI organometallics mass spectra applying isotopic patterns

Interpretation of EI organometallics mass spectra applying isotopic patterns Jan Lamkiewicz, Jacek A. SZYMURA ? Faculty of Chemical Technology and Engineering, University of Technology and Life Sciences, Bydgoszcz Please cited as: CHEMIK 2011, 65, 4, 243-248 This work presents results obtained from interpretation of EI mass spectra of organic derivatives of Pt, Mo, Ge, Sn and Pb multiisotopic metals, containing 4-10 stable isotopes. Use of computer- aided chemometric band composition analysis BCA applying isotope patterns enabled identification of all ions present in simple and...

Category Archives: Year 2011 Issue 4