Chemia Zeszyt 2-Ch (17) 2012

Czasopismo Techniczne

2012

Data publikacji: 2012

Licencja: Żadna

Redakcja

Redaktor naczelny Józef Gawlik

Redaktor tematyczny Krzysztof Pielichowski

Zawartość numeru

Heat transfer between man and surroundings in cold microclimate

Aleksandra Cul, Tadeusz Komorowicz, Krzysztof Kupiec

Czasopismo Techniczne, Chemia Zeszyt 2-Ch (17) 2012, 2012, s. 3 - 14

https://doi.org/10.4467/2353737XCT.14.114.1891

The need to keep up a constant body temperature forces on man both the conditions of staying as well as limitations of staying time in cold and hot microclimate. The factors influencing the heat transfer between the man and the surroundings are: the metabolic rate, clothing thermal insulation properties and physical parameters of surroundings (air temperature, humidity and velocity as well as heat radiation temperature). This paper deals with conditions and limitations of staying for man in cold microclimate. Results of applicable calculations have been presented graphically.

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Aggregation-induced emission enhancement of optically active copolymers

Mateusz Galica, Dariusz Bogdał

Czasopismo Techniczne, Chemia Zeszyt 2-Ch (17) 2012, 2012, s. 5 - 23

https://doi.org/10.4467/2353737XCT.14.115.1892

The absorption and photoluminescence spectra of the polymer in DMF-H2O systems were analyzed. Finally, it was determined to enhance the ability of AIEE effect for CEM-5MK solutions. In results, study confirmed the usefulness of the copolymers CEM / MK as materials for optoelectronic applications.

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Modern solutions within the scope of the preparation and quality control of emulsions systems

Patrycja Gilewicz, Barbara Tal-Figiel, Wiesław Figiel, Magdalena Kwiecień

Czasopismo Techniczne, Chemia Zeszyt 2-Ch (17) 2012, 2012, s. 25 - 40

https://doi.org/10.4467/2353737XCT.14.116.1893

Rheological studies are applied to determine the stability and the quality of emulsion systems. In this paper work research of rheological properties are shown. Emulsions were prepared by using a modern mixer Unguator 2100. In preparation of cosmetic emulsions in cold process, complex waxes systems were used.

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Application of monte Carlo method for determination of multiple reactions kinetic curves

Monika Gwadera, Krzysztof Kupiec

Czasopismo Techniczne, Chemia Zeszyt 2-Ch (17) 2012, 2012, s. 41 - 52

https://doi.org/10.4467/2353737XCT.14.117.1894

Kinetic curves for multiple reactions have been determined by the means of the Monte Carlo method. Both reversible and nonreversible parallel, series, series-parallel and autocatalytic reactions have been taken under consideration. The complete consistency between results of stochastic calculations and results obtained with the use of deterministic models has been shown.

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Regio-and stereoselectivity of [2+3] cycloaddition of α-substituted nitroethenes with 1,3-dipoles propargyl-allene and allyl type

Radomir Jasiński, Maria Mikulska, Jan Socha, Andrzej Barański

Czasopismo Techniczne, Chemia Zeszyt 2-Ch (17) 2012, 2012, s. 53 - 63

https://doi.org/10.4467/2353737XCT.14.118.1895

The paper is a critical review of available literature data about regio- and stereoselectivity of [2+3] cycloaddition reactions of α-substituted nitroethenes.

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Application of Na12[WZn3(H2O)2][ZnW9O34)2] polyoxometalate as a catalyst in oxidation of alcohols under microwave irradiation

Wiktor Kasprzyk, Mateusz Galica, Szczepan Bednarz, Dariusz Bogdał

Czasopismo Techniczne, Chemia Zeszyt 2-Ch (17) 2012, 2012, s. 65 - 71

https://doi.org/10.4467/2353737XCT.14.119.1896

In this paper the results of oxidation of alcohols under microwave irradiation using Na₁₂[WZn₃(H₂O)₂][ZnW₉O₃₂)₂] (ZnPOM) as a catalyst was shown. These reactions were conducted in microwave high-pressure reactor using acetonitryl as organic solvent and 30% hydrogen peroxide as oxidant. Under reaction conditions primary alcohols were oxidized to appropriate acids, secondary alcohols were oxidized to ketones. In case of diols it was found that secondary –OH groups were oxidized in the first instance.

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Isolation of hexabromocyclododecane from fat matrix using size exclusion chromatography

Joanna Kuc

Czasopismo Techniczne, Chemia Zeszyt 2-Ch (17) 2012, 2012, s. 73 - 82

https://doi.org/10.4467/2353737XCT.14.120.1897

Two methods of isolation of hexabromocyclododecane from fat matrix by using size exclusion chromatography were developed and compared. Standard solutions and salmon tissue extract were investigated. Solvents were chosen for the elution of sample components from the Bio-Beads S-X3 beads. Studies have shown that the use of the SEC technique to isolate HBCD from fat matrix allows effective removal of most of the interfering components.

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Technologies of biogas production from different sources – a review

Justyna Kwaśny, Marcin Banach, Zygmunt Kowalski

Czasopismo Techniczne, Chemia Zeszyt 2-Ch (17) 2012, 2012, s. 83 - 102

https://doi.org/10.4467/2353737XCT.14.121.1898

Biogas is produced in the anaerobic digestion of biomass. It is a mixture of methane (mainly), carbon monoxide, hydrogen sulfide and water in vapor form. The concentrations of these gases vary depending on the type of fermentation process substrates, which affect the chemical composition of biogas. The paper presents the characteristics of the biomass subjected to anaerobic processing. Also selected technologies of biogas production from different origin – sewage treatment plants, landfill and agricultural are discussed.

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The influence of The mold temperature on the properties of polyamide composites

Tomasz M. Majka, Krzysztof Pielichowski, Agnieszka Leszczyńska, Maciej Starakiewicz

Czasopismo Techniczne, Chemia Zeszyt 2-Ch (17) 2012, 2012, s. 103 - 113

https://doi.org/10.4467/2353737XCT.14.122.1899

Each varying parameter which can contribute to the quality of received applications plays an important role in the processing of polymer materials. The influence of mold temperature on the molded parts’ properties and density was investigated during the optimization of injection molding process parameters of polyamide-6 (PA-6) as well as polyamide-6/montmorillonite (PA-6/MMT) composites. The hardness and Izod notched impact strength were determined for the obtained PA-6-based materials.

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Propolis – beekeeping medicinal product

Dagmara Malina, Agnieszka Sobczak-Kupiec, Bożena Tyliszczak, Katarzyna Bialik-Wąs, Zbigniew Wzorek

Czasopismo Techniczne, Chemia Zeszyt 2-Ch (17) 2012, 2012, s. 115 - 123

https://doi.org/10.4467/2353737XCT.14.123.1900

The paper presents the healing properties and biological activity of propolis, commonly known as bee glue. Propolis is a natural product collected by bees from buds of plants and bark of trees, then moistened with bee enzymes. Propolis is widely used for general treatment, skin affections, and as an anti-inflammatory agent for ulcers and hard-to-heal wounds. Propolis, due to its properties, is called an antibiotic of the 21^st century.

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Separation of pig slurry using sedimentation and pressurized filtration

Marta Marszałek, Zygmunt Kowalski, Agnieszka Makara

Czasopismo Techniczne, Chemia Zeszyt 2-Ch (17) 2012, 2012, s. 125 - 134

https://doi.org/10.4467/2353737XCT.14.124.1901

Intensive non-bedding pig farming results in the formation of large quantities of liquid waste in the form of slurry. In areas with high concentration of pig farms where we have to deal with insufficient acreage of arable land there is often a difficulty with management of pig slurry’s surplus. The solution to this problem may become a separation of slurry into solid fraction, rich in phosphorus and liquid fraction, which contains mainly nitrogen and potassium. The paper presents the fractionation of pig slurry using sedimentation and pressurized filtration.

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Synthesis of fragrances – derivatives of aldehydes

Katarzyna Mitka, Justyna Staryńska

Czasopismo Techniczne, Chemia Zeszyt 2-Ch (17) 2012, 2012, s. 135 - 148

https://doi.org/10.4467/2353737XCT.14.125.1902

In this paper a short history of fragrances is described and the aldehydes most often used in perfumes are presented. The reactions of various aromatic aldehydes with hydroxylamine hydrochloride are also discussed.

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Heat pipes – principle of operation, construction, applications

Aleksander Pabiś

Czasopismo Techniczne, Chemia Zeszyt 2-Ch (17) 2012, 2012, s. 149 - 161

https://doi.org/10.4467/2353737XCT.14.126.1903

The principle of operation, the construction types, the range of use as well as a large review of
possible applications of het pipes has been presented in this paper.

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Laboratory stand-up for heat transfer intensity assessment in case of low temperature heat pipes

Aleksander Pabiś, Angelika Koszut, Kamila Szufnarowska

Czasopismo Techniczne, Chemia Zeszyt 2-Ch (17) 2012, 2012, s. 163 - 173

https://doi.org/10.4467/2353737XCT.14.127.1904

The basic information on heat pipes, a description of laboratory stand-up together with description of research of heat transfer intensity as well as obtained results have been presented in this paper.

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Controlled free radical polymerization of methacrylates containG carbazole and cumarin pendant groups

Urszula Pisarek, Mateusz Galica, Dariusz Bogdał

Czasopismo Techniczne, Chemia Zeszyt 2-Ch (17) 2012, 2012, s. 175 - 182

https://doi.org/10.4467/2353737XCT.14.128.1905

This paper presents the results of synthesis copolymers based on 2-(9-carbazolyl)ethyl methacrylate (CEM) and 7- (diethylamino)coumarin-3-carboxylic acid 2-(methacryloyloxy) ethyl ester (MK) using ATRP technique. The reactions were carried out both under conventional and microwave conditions. Various activations system with organic ligand 1,10-phenanthroline monohydrate were tested. Obtained polymers were characterized by GPC and UV-VIS techniques.

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Synthesis of nitrones

Jan Socha, Magdalena Jabłońska, Karolina Głąb, Maria Mikulska, Radomir Jasiński, Andrzej Barański

Czasopismo Techniczne, Chemia Zeszyt 2-Ch (17) 2012, 2012, s. 183 - 207

https://doi.org/10.4467/2353737XCT.14.129.1906

The paper is a critical review of available literature data that are connected with synthesis of nitrones.

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Modeling of biofilm structure using cellular automaton

Bolesław Tabiś, Szymon Skoneczny

Czasopismo Techniczne, Chemia Zeszyt 2-Ch (17) 2012, 2012, s. 209 - 2015

https://doi.org/10.4467/2353737XCT.14.130.1907

Cellular automaton model has been elaborated for simulation microbial process in a biofilm. It was shown that the proposed algorithm gives possibility to obtain various structures of microbial biofilms, depending on operating conditions.

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Słowa kluczowe: heat transfer, cold microclimate, clothing insulation factor (IREQ), absorption, emission, aggregation, emulsion, stability, Monte Carlo method, multiple chemical reactions, chemical kinetics, cycloaddition, nitroalkenes, regioselectivity, stereoselectivity, polyoxometalates, oxidation, microwave irradiation, hydrogen peroxide, BFRs, HBCD, food analysis, SEC/GPC, biogas, methane fermentation, biomass, renewable energy sources, polyamide, montmorillonite, composite, injection molding, propolis, apitherapy, medicinal properties, pig slurry, fractionation, sedimentation, pressurized filtration, fragrance substances, cosmetic industry, arylaldehydes, nitriles, heat pipes, condensation, vaporization, heat transfer, heat pipes, heat transfer, atom transfer radical polymerization, microwave irradiation, carbazole, coumarin, copolymer, luminescence, nitrones, synthesis, hydroxylamines, carbonyl compounds, imines, amines, oximes, nitroso compounds, biofilm, cellular automata, mathematical modeling