Tag Archives: nanoparticles

Ion-selective electrodes – classical systems and new ideas

Ion-selective electrodes – classical systems and new ideas MAKSYMIUK K., MICHALSKA A.

Please cite as: CHEMIK 2015, 69, 7, 378–382 The article concerns trends in development of ion-selective electrodes used in potentiomeric analysis, it shows typical practical solutions and describes main trends of research concerning this group of sensors, oriented both to construction simplification and improvement of analytical parameters. New analytical advantages, achieved under conditions of galvanostatic polarization, were also described. Keywords: Ion-selective electrodes, potentiometry, construction simplification, detection limit lowering, nanoparticles, electrochemical current based techniques Read more in pdf pdf-icon...
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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, in combination with xanthene dye (5,7-diiodo-3-butoxy-6-fluorene, DIBF) used as sensitizer. Photoinitiation abilities of tested compositions were studied by measuring the rate of heat evolution during polymerization in thin film cured sample. The measurements were performed by measuring photopolymerization exoterms using photo-DSC apparatus. The reaction of PEGDA polymerization coinitiating by marcaptoazoles- MPCs (MAz-MPCs) proceeds efficiently than in the presence of marcaptoazoles acting as free molecule. Keywords: azoles, synthesis, nanoparticles, photoinitiation, radical polymerization Read more: pdf-icon...
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Nanocarriers as modern transport media in drug delivery systems

Nanocarriers as modern transport media in drug delivery systems NIEMIROWICZ K., CAR H. Please cite as: CHEMIK 2012, 66, 7, 868-881 In drug delivery systems there are many different groups used at the level of nanoparticles (NP), including polymers, carbon materials and magnetic nanoparticles. The above-mentioned compounds occur in the form of a simple carrier or make a complex core ? shell system, e.g. on a magnetic core. This modification allows for a controlled drug delivery to a target site as well as imaging the celllevel drug desorption processes. This paper presents the process of synthesising the drug carriers, functionalising their surfaces and the methods for immobilising active substances on their surface with special emphasis given to magnetic materials. Keywords: nanocarriers, nanoparticles, targeted therapy, drug delivery system (DDS), core-shell structures. Read more: pdf-icon...
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Water-soluble branched copolymers dextran-polyacrylamide and their anionic derivates as matrices for metal nanoparticles in situ synthesis

Water-soluble branched copolymers dextran-polyacrylamide and their anionic derivates as matrices for metal nanoparticles in situ synthesis BEZUGLY M., KUTSEVOL N., RAWISO M., BEZUGLA T. Please cite as: CHEMIK 2012, 66, 8, 862-867 Metal nanoparticles were synthesized in water-soluble polymer matrices with different internal macromolecule structures. Linear Polyacrylamide (PAA) and branched star-like copolymers Dextrangraft- Polyacrylamide (D-g-PAA) and their anionic derivatives were used for in situ synthesis of Ag and Pd nanosystems. The influence of the matrix nature and internal structure of macromolecules in solution on the nanoparticles formation was studied. Keywords: branched copolymers, dextran, polyacrylamide, polyacrylic acid, nanoparticles Read more: pdf-icon...
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Unusual survival strategies of organisms. Do they have a technical meaning?

Unusual survival strategies of organisms. Do they have a technical meaning? KAFARSKI P. Please cite as: CHEMIK 2012, 66, 3, 192-193 The author draws attention to the ecosystem as a complex and dynamic community of plant and animal species in the physical environment in which they live. It shows that nature can be a source of research ideas, and beneficial to observe the ways developed by specific organisms and understand their molecular mechanisms may be the inspiration for the design of devices profitable for human beings. Keywords: ecosystem, survival strategies, nanoparticles, researching inspirations...
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