Investigation of classifying tomato seeds in drum screen
Category Archives: Year 2011 Issue 4
An airflow resistance of a bean seed in a cylindrical dryer with a stationary bed
An airflow resistance of a bean seed in a cylindrical dryer with a stationary bed
Joanna KANIEWSKA, Marek DOMORADZKI, Wojciech KORPAL, Wojciech POĆWIARDOWSKI ? Department of Technology and Apparatuses of Chemical and Food Industry, Faculty of Chemical Technology and Engineering, University of Technology and Life Sciences, Bydgoszcz Please cited as: CHEMIK 2011, 65, 4, 353-358 In this paper a pressure gradient on a bean seed layer in dependence on a bed height and an airflow velocity in a cylindrical dryer research are presented....Application aqueous polymer dispersions for encapsulation of granular fertilizers
Application aqueous polymer dispersions for encapsulation of granular fertilizers
Krzysztof Żywociński, Grażyna Gozdecka, Wojciech Korpal ? Faculty of Chemical Technology and Engineering, University of Technology and Life Science, Bydgoszcz Please cited as: CHEMIK 2011, 65, 4, 347-352 In this work granular, compound fertilizer for trees and shrubs during the prolonged operation using the three selected aqueous polymer dispersion coatings. The dissolution rate of fertilizer thus obtained was determined by conductometric measuring the electrical conductivity of the resulting solution. Calculated polymer content in the pellet and...Lipase immobilization in a silica gel matrix
Lipase immobilization in a silica gel matrix
Joanna M. JAKUBIAK ? Department of Chemical and Bioprocess Engineering, Faculty of Chemical Technology and Engineering, University of Technology and Life Sciences, Bydgoszcz; Nicolaus Copernicus University, Toruń; Marek J. WÓJCIK - Department of Chemical and Bioprocess Engineering, University of Technology and Life Sciences, Bydgoszcz Please cited as: CHEMIK 2011, 65, 4, 343-346 The immobilization of lipase from Candida rugosa in a matrix of silica gel obtained from tetramethoxysilane by means of a sol-gel process was investigated....Obtaining PVC/CNT nanocomposites with the use of dispersing agents
Obtaining PVC/CNT nanocomposites with the use of dispersing agents Katarzyna SKÓRCZEWSKA, Danuta CHMIELEWSKA, Kazimierz PISZCZEK, Jolanta TOMASZEWSKA, Tomasz STERZYŃSKI - Faculty of Chemical Technology and Engineering, University of Technology and Life Sciences, Bydgoszcz Please cited as: CHEMIK 2011, 65, 4, 337-342 Method is presented for the preparation of nanocomposites of polyvinyl chloride (PVC) and multi-walled carbon nanotubes (MWCNT), wherein the nanoparticles are dispersed in a solution of PVC in tetrahydrofuran (THF), with the addition of dispersing aids (MWCNT content in final nanocomposite 1% wt.). The...
Read more
Studies of processing properties of PVC/wood composites
Studies of processing properties of PVC/wood composites Krzysztof LEWANDOWSKI, Stanisław ZAJCHOWSKI, Jacek MIROWSKI, Artur KOŚCIUSZKO ? Faculty of Chemical Technology and Engineering, University of Technology and Life Sciences, Bydgoszcz Please cited as: CHEMIK 2011, 65, 4, 329-336 Properties of products obtained from wood polymer composites (WPC) based on thermoplastic polymers generally depend on a properties of polymer matrix, a kind and content of filler as well as on processing conditions. In presented work, evaluation attempt of processing temperature influence on mechanical properties of poly(vinyl...
Read more
Selection criteria of lacquer composition on wood surfaces from aqueous dispersions of acrylic polymers
Selection criteria of lacquer composition on wood surfaces from aqueous dispersions of acrylic polymers Anna ZALEWSKA, Joanna KOWALIK - Faculty of Chemical Technology and Engineering, University of Technology and Life Sciences, Bydgoszcz Please cited as: CHEMIK 2011, 65, 4, 321-328 The paper presents the results of properties of acrylic coatings from the composition of paint on wooden surfaces. The polyurethane thickeners, inorganic thickeners, kaolin and montmoryllonit have been tested. The viscosity of the lacquer composition was obtained. Resulting of the compositions were applied with an...
Read more
Modification of epoxy powder paint using vinyl polymers
Modification of epoxy powder paint using vinyl polymers Edwin MAKAREWICZ, Agnieszka MICHALIK - Faculty of Chemical Technology and Engineering, University of Technology and Life Sciences, Bydgoszcz Please cited as: CHEMIK 2011, 65, 4, 315-320 The document presents researches on epoxy powder paint modifying approaches with polyethylene, poly(vinyl chloride) emulsion and suspension and copolymer chloride with vinyl acetate. Coatings derived from epoxy powder paint are very hard and not flexible. The goal of powder paint modification with the vinyl polymers and plasticizer dibuthyl phthalate was to...
Read more
Flocculation efficiency of cationic potato starch in the presence of coagulants
Flocculation efficiency of cationic potato starch in the presence of coagulants Dorota Ziółkowska, Alexander Shyichuk, Piotr Cysewski, Agnieszka Organiściak - Division of General Chemistry, Faculty of Chemical Technology and Engineering, University of Technology and Live Sciences, Bydgoszcz Please cited as: CHE MIK 2011, 65, 4, 309-314 The work contains experimental data on flocculation abilities of cationized potato starch applied together with ferric and aluminum coagulants. The sedimentation efficiency for model kaolin suspensions has been determined with nephelometric method. It has been stated that modified starch...
Read more
Effect of UV radiation on the fastness of selected UV filters
Effect of UV radiation on the fastness of selected UV filters Alicja GACKOWSKA, Jerzy GACA - Chair 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, 301-304 Studies on the fastness of selected UV filters: 1-(4?-t-butylphenyl)-3-(4??-methoxyphenyl) propane-1,3-dione (MBBM), 1,3-bis-(4?-methoxyphenyl)propane-1,3-dione (MMBM) and 1-(4?-t-methoxyphenyl)-3-phenylpropane-1,3-dione (MBM) were carried out. Effect of UV radiation, presence of an oxidizing agent (hydrogen peroxide) and source of chloride ions (sodium chloride) on the...
Read more