Category Archives: Year 2015 Issue 8

Toxicity of quaternary ammonium ionic liquids to aquatic organisms Justyna ZACKIEWICZ*, Agata JAKUBOWSKA, Elżbieta GRABIŃSKA-SOTA – Department of Environmental Biotechnology, Faculty of Energy and Environmental Engineering, Silesian University of Technology, Gliwice, Poland

Please cite as: CHEMIK 2015, 69, 8, 477–484 Ionic liquids are simple mixtures of cations and anions. These compounds are identified by the acronym ILs. ILs are liquids in low temperature, and their melting point is below 100°C [1]. Quaternary ammonium ionic liquids (QAILs) are composed...

Trehalose – properties, biosynthesis and applications Malgorzata BUREK, Sylwia WAŚKIEWICZ, Ilona WANDZIK*, Klaudia KAMIŃSKA – Faculty of Chemistry, Silesian University of Technology, Gliwice, Poland

Please cite as: CHEMIK 2015, 69, 8, 469–476 A few decades ago it was thought that carbohydrates are just the source of energy. However, over the years it was revealed that many of them fulfill specialized biological functions. Trehalose, which was described for the first time in the 30s of the nineteenth century, turned...

Cellulase immobilized on copolymers based on N-vinylformamide: Influence of immobilization on the catalytic activity of the enzyme Katarzyna SOKOŁOWSKA – Faculty of Chemistry, Jagiellonian University, Kraków, Poland; Anna KONIECZNA–MOLENDA – Institute of Chemistry and Physics, University of Agriculture, Kraków, Poland; Ewa WITEK* – Faculty of Chemistry, Jagiellonian University, Kraków, Poland

Please cite as: CHEMIK 2015, 69, 8, 447–454 Cellulolytic enzymes play an important role in many advanced technologies, in various industries. They are used, among others, in the textile industry,...

Aminopeptidases isolated from plants of great economic value – role and characteristics Joanna KANIA*, Danuta GILLNER – Faculty of Chemistry, Silesian University of Technology, Gliwice, Poland

Please cite as: CHEMIK 2015, 69, 8, 463–468 Aminopeptidases (EC 3.4.11.XX) belong to the group of  proteases, important enzymes which play key roles in many life  processes. They catalyze the hydrolysis of amino acids located at  the N-terminus of peptide and are involved in proteins degradation  to free amino acids. Leucine aminopeptidase...

Release of active ingredients from cosmetic emulsionsJoanna IGIELSKA-KALWAT*, Izabela NOWAK – Laboratory of Applied Chemistry, Faculty of Chemistry, Adam Mickiewicz University, Poznań, Poland Please cite as: CHEMIK 2015, 69, 8, 498–504 Fast development of cosmetic industry and increasing awareness about healthy appearance have prompted the need for improved quality of cosmetic products and stimulated development of new methods aimed at characterisation and performance of new products. One of the fundamental tests of cosmetic preparations is that for bioavailability, which permits determination of...

Freshwater Cladophora glomerata as a new potential cosmetic raw material Joanna FABROWSKA*, Bogusława ŁĘSKA, Grzegorz SCHROEDER – Faculty of Chemistry, Adam Mickiewicz University, Poznań, Poland

Please cite as: CHEMIK 2015, 69, 8, 491–497 Currently, algae and their extracts are one of the most commonly used natural cosmetic raw materials [1]. This is due to the presence of biologically active compounds in their thalli such as carbohydrates, fatty acids, and polyphenols, which determines the multidirectional algae cosmetics to the skin. The cosmetic market...

Spectroelectrochemical techniques as modern tools for investigating charge transfer processes in conjugated polymers Tomasz Jarosz, Katarzyna Krukiewicz, Mieczyslaw Lapkowski, Wojciech DomagaLa* – Department of Physical Chemistry and Technology of Polymers, Faculty of Chemistry, Silesian University of Technology, Gliwice, Poland.

Please cite as: CHEMIK 2015, 69, 8, 485–490 Electrochemistry is a rapidly developing field of chemistry, whose fruits are widely applied commercially. Electrochemical analysis techniques allow charge transfer processes, taking place in studied systems, to be followed. Information obtained...

Characteristics and nature usability of municipal sewage sludges in Dolnośląskie Voivodeship Joanna GŁODEK* – Sewage and Water Protection Technology Department of Institute of Environmental Protection – National Research Institute, Wroclaw, Poland

Please cite as: CHEMIK 2015, 69, 8, 505–512 Natural utilization of sewage sludges is an economically justified method of their disposal. However, the sludges destined for utilization in the natural environment must fulfil relevant requirements concerning chemical composition and the sanitary-hygienic features defined by the stipulations of law...

Application of X-ray diffraction for studies on microbially induced metal corrosion Alicja Hryniszyn, Beata Cwalina* – Department of Environmental Biotechnology, Faculty of Energy and Environmental Engineering, Silesian University of Technology, Gliwice, Poland

Please cite as: CHEMIK 2015, 69, 8, 455–462 Metals and their alloys often undergo corrosion. In some cases it is related to activity of microorganisms forming biofilm on the metal surface. Such a situation is also typical for drinking water supply system. Cells and the organic matter...