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    Wyświetlanie 1-11 z 11
    Tytuł:
    Light conditions alter accumulation of long chain polyprenols in leaves of trees and shrubs throughout the vegetation season.
    Autorzy:
    Bajda, Agnieszka
    Chojnacki, Tadeusz
    Hertel, Józefina
    Swiezewska, Ewa
    Wójcik, Jacek
    Kaczkowska, Alicja
    Marczewski, Andrzej
    Bojarczuk, Tomasz
    Karolewski, Piotr
    Oleksyn, Jacek
    Powiązania:
    https://bibliotekanauki.pl/articles/1041482.pdf
    Data publikacji:
    2005
    Wydawca:
    Polskie Towarzystwo Biochemiczne
    Tematy:
    plant polyprenols
    SLA
    Opis:
    In many plants belonging to angiosperms and gymnosperms the accumulation in leaves of long chain polyprenols and polyprenyl esters during growth in natural habitats depends on the light intensity. The amount of polyprenols in leaves is also positively correlated with the thickness of the leaf blade (SLA, specific leaf area). The polyprenol content of leaves shows seasonal changes with a maximum in autumn and a minimum in early summer with the difference between poorly and well illuminated plants persisting throughout the vegetation season.
    Źródło:
    Acta Biochimica Polonica; 2005, 52, 1; 233-241
    0001-527X
    Pojawia się w:
    Acta Biochimica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Pyromorphite formation from montmorillonite adsorbed lead
    Autorzy:
    Bajda, Tomasz
    Marchlewski, Tomasz
    Manecki, Maciej
    Powiązania:
    https://bibliotekanauki.pl/articles/2086508.pdf
    Data publikacji:
    2011
    Wydawca:
    Polskie Towarzystwo Mineralogiczne
    Tematy:
    sorption
    desorption
    immobilization
    crystallization
    apatite
    smectite
    Opis:
    The reaction of Pb-adsorbed montmorillonite with aqueous solutions of PO4 and Cl ions results in the decrease in phosphate concentration associated with the formation of a new phase – pyromorphite Pb5(PO4)3Cl. Pyromorphite crystals range in size from hundreds of nm to several tens of μm, depending on the PO4, K, and Ca concentrations in the reacting system. A strong ion-exchange effect of K+ and Ca2+ cations on desorption of Pb2+ from Pb-adsorbed montmorillonite was observed. Also, a high concentration of cations leads to a rapid desorption of Pb and the formation of fine pyromorphite crystals. In contrast, low PO4, K and Ca concentrations result in the formation of relatively large euhedral crystals. Final Pb concentrations are much lower in experimental sets than in control experiments with no phosphate present.
    Źródło:
    Mineralogia; 2011, 42, 2/3; 75--91
    1899-8291
    1899-8526
    Pojawia się w:
    Mineralogia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Synthesis and solubility of brompyromorphite Pb5(PO4)3Br
    Autorzy:
    Janicka, Urszula
    Bajda, Tomasz
    Manecki, Maciej
    Powiązania:
    https://bibliotekanauki.pl/articles/127627.pdf
    Data publikacji:
    2012
    Wydawca:
    Polskie Towarzystwo Mineralogiczne
    Tematy:
    lead
    phosphate
    apatite
    dissolution
    brompyromorphite
    solubility product
    Opis:
    The bromide analogue of pyromorphite Pb5(PO4)3Br was synthesized and characterized by X-ray diffraction, infrared spectroscopy and scanning electron microscopy. The solubility of the brompyromorphite was measured at 25°C and pH values of 2.0, 2.6 and 3.2. For the 3 pH measurements, the average solubility product, log KSP, for the reaction Pb5(PO4)3Br 5Pb2+ + 3PO4 3– + Br– at 25ºC is –77.38 ± 0.70. The free energy of formation, Gf,298, calculated from this measured solubility product is –3724.7 ± 4.3 kJ mol−1. These results confirm that brompyromorphite is more soluble than pyromorphite.
    Źródło:
    Mineralogia; 2012, 43, 1/2; 129-135
    1899-8291
    1899-8526
    Pojawia się w:
    Mineralogia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    E-podręczniki – wyzwanie edukacji polonistycznej
    Autorzy:
    Bajda, Justyna
    Piekot, Tomasz
    Michułka, Dorota
    Powiązania:
    https://bibliotekanauki.pl/articles/782836.pdf
    Data publikacji:
    2015
    Wydawca:
    Uniwersytet Pedagogiczny im. Komisji Edukacji Narodowej w Krakowie
    Opis:
    *
    Źródło:
    Annales Universitatis Paedagogicae Cracoviensis. Studia ad Didacticam Litterarum Polonarum et Linguae Polonae Pertinentia; 2015, 6, 195; 208-225
    2082-0909
    Pojawia się w:
    Annales Universitatis Paedagogicae Cracoviensis. Studia ad Didacticam Litterarum Polonarum et Linguae Polonae Pertinentia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Characteristics of sorbent products obtained by the alkaline activation of waste from waste incineration plants
    Autorzy:
    Grela, Agnieszka
    Łach, Michał
    Bajda, Tomasz
    Mikuła, Janusz
    Powiązania:
    https://bibliotekanauki.pl/articles/127590.pdf
    Data publikacji:
    2017
    Wydawca:
    Polskie Towarzystwo Mineralogiczne
    Tematy:
    alkali-activated
    ash from waste incineration
    slag from waste incineration
    Opis:
    Poland, by 2020 430,000 Mg of hazardous waste will be formed annually by the combustion of waste. This waste must be properly managed so as not to endanger the environment. One promising way to manage selected waste is to process it in the synthesis of materials characterised by sorption properties. The results presented in this paper concern the possibility of producing sorbents from waste materials marked with codes 190112 and 190114, which came from two waste incineration plants in Poland. Alkaline activation was performed using two methods: a) hydrothermal, in a solution of 8 M NaOH at 75°C for 24 h; and b) in an autoclave, using a solution of 2 M NaOH at 140°C for 6 h. XRD analyses led to the identification of materials after synthesis of the following zeolite phases: analcime, chabazite and thomsonite. chabazite and analcime can be valuable absorbent materials.
    Źródło:
    Mineralogia; 2017, 48, 1/4; 87-105
    1899-8291
    1899-8526
    Pojawia się w:
    Mineralogia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Current stage of knowledge relating to the use ferruginous sludge from water treatment plants – a preliminary review of the literature
    Autorzy:
    Wołowiec, Magdalena
    Bajda, Tomasz
    Powiązania:
    https://bibliotekanauki.pl/articles/127615.pdf
    Data publikacji:
    2017
    Wydawca:
    Polskie Towarzystwo Mineralogiczne
    Tematy:
    water treatment residuals
    reuse
    water treatment
    plant sludge management
    Opis:
    In water treatment plants, a large amount of wastewater and sludge is generated during the processing of drinking water. The composition of the sludge is determined by the type and raw water chemistry, as well as the methods and materials used for purification. The major components of the sludge are iron and manganese oxyhydroxides. In the past, the sludge was landfilled, but for environmental reasons it became necessary to find uses for the sludge. The aim of this study was to identify examples of using this sludge. Nowadays, the sludge is applied in the treatment of municipal wastewater, agriculture, and the production of cement and bricks, among others. Attention was also paid to the possibility of using the water processing sludge in different sorption applications.
    Źródło:
    Mineralogia; 2017, 48, 1/4; 39-45
    1899-8291
    1899-8526
    Pojawia się w:
    Mineralogia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The removal of organic compounds by natural and synthetic surface-functionalized zeolites: a mini-review
    Autorzy:
    Muir, Barbara
    Wołowiec, Magdalena
    Bajda, Tomasz
    Nowak, Paulina
    Czupryński, Piotr
    Powiązania:
    https://bibliotekanauki.pl/articles/127592.pdf
    Data publikacji:
    2017
    Wydawca:
    Polskie Towarzystwo Mineralogiczne
    Tematy:
    organo-zeolites
    volatile organic compounds
    surface modification
    petroleum derivatives
    Opis:
    The use of zeolites as sorbents has been investigated as a replacement for existing costly methods of removing organic contaminants from water solutions. Zeolites can be modified by inorganic salts, organic surfactants, metals or metal oxides in order to increase their adsorption capacity. The unique ion exchange and adsorption properties of zeolites make them very suitable for application in the removal of organic compounds such as volatile organic compounds (VOCs), polycyclic aromatic hydrocarbons (PAHs), phenols and other complex petrochemicals. Many different studies have demonstrated their effectiveness in reducing the concentrations of organic contaminants as well as petroleum derivatives in water, which has been summarized in this paper.
    Źródło:
    Mineralogia; 2017, 48, 1/4; 145-156
    1899-8291
    1899-8526
    Pojawia się w:
    Mineralogia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Third Scientific and Technical Conference "Minerals Sorbents", Raw Materials, Power Engineering, Environmental Protection, Modern Technologies, 18–19 September 2017, Cracow
    Autorzy:
    Bajda, Tomasz
    Powiązania:
    https://bibliotekanauki.pl/articles/127576.pdf
    Data publikacji:
    2017
    Wydawca:
    Polskie Towarzystwo Mineralogiczne
    Tematy:
    organic substances
    inorganic substances
    modern science
    industry
    editorial
    Opis:
    We present an issue containing articles that were presented at the Third Scientific and Technical Conference "Minerals Sorbents", Raw Materials, Power Engineering, Environmental Protection, Modern Technologies, which took place on 18–19 September 2017 in Cracow. The conference was a great forum for exchanging experiences, presenting the latest research achievements of the country's leading scientific units to the representatives of the key industry sectors whose production technologies are based on the use of mineral sorbents.
    Źródło:
    Mineralogia; 2017, 48, 1/4; 1-2
    1899-8291
    1899-8526
    Pojawia się w:
    Mineralogia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Time constraints on experimental studies of lead apatites
    Autorzy:
    Topolska, Justyna
    Bajda, Tomasz
    Puzio, Bartosz
    Manecki, Maciej
    Kozub-Budzyń, Gabriela
    Powiązania:
    https://bibliotekanauki.pl/articles/2058621.pdf
    Data publikacji:
    2019
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    pyromorphite
    vanadinite
    experimental mineralogy
    dissolution
    solubility synthesis
    Opis:
    The paper presents the results of experimental studies on the synthesis and thermodynamic stability of selected Pb-apatites in terms of criteria determining termination of the experiments. Based on the case study, we indicate difficulties in analysing the obtained experimental data. Time-resolved sampling of precipitate formed during a dropwise synthesis of pyromorphite was performed and the results were compared to the literature data. It has been concluded that the Ostwald ripening time for synthesized solids depends primarily on the chemical composition of the intended Pb-apatite phase. We presented that heterogeneity of precipitate affects its dissolution in terms of repeatability of the results and equilibrating time. A unique 9-year-long experiment on vanadinite stability at a pH range from 2.0-6.0 revealed that among all tested dissolution conditions only the reactions at the pH = 3.5 can perform as the basis for some thermodynamic calculations. It has been concluded that the rate of phase transitions in the Pb-apatites group can be misleading in terms of determining the equilibrium of the system, and the experimental setup designed particularly to provide reliable controls in this aspect should be involved. Means in this respect have been proposed.
    Źródło:
    Geological Quarterly; 2019, 63, 4; 721--728
    1641-7291
    Pojawia się w:
    Geological Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of calcinated halloysite on structure and properties of rigid poly(vinyl chloride) composites
    Autorzy:
    Wieczorek, Martina
    Tomaszewska, Jolanta
    Bajda, Tomasz
    Długosz, Jacek
    Powiązania:
    https://bibliotekanauki.pl/articles/2202880.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    polymer composites
    mechanical properties
    thermal properties
    halloysite
    poly(vinyl chloride)
    kompozyty polimerowe
    właściwości mechaniczne
    właściwości termiczne
    haloizyt
    chlorek winylu
    Opis:
    Halloysite is a filler which may be used to produce composites with thermoplastic polymer matrix. This work summarized the results of investigations of processing, structural, mechanical, and thermal properties of the composites with poly(vinyl chloride) (PVC) matrix and raw halloysite (HA) as well as its calcined product (KHA). The effectiveness of calcination was confirmed with X-ray diffraction, Fourier-transform infrared spectroscopy, scanning electron microscopy, and nitrogen adsorption method. The PVC composites with HA as well as KHA were processed in the molten state in the Brabender mixer chamber. The reduction of gelation time and simultaneous increase in maximum torque with filler content were found based on the results of plastographometric analysis. SEM images of PVC/halloysite composites showed a homogeneous distribution of the filler in the polymer matrix. The introduction of halloysite leads to a slight increase in Young’s modulus and tensile strength compared to neat PVC, where the increase of both parameters is greater when KHA is used. The incorporation of 1% KHA led to an increase in impact strength, an effect which may be attributed to toughening of the polymer. A slight improvement of the Vicat softening temperature of 2.7 degrees C for PVC/HA and heat deflection temperature of 2.4 C for PVC/KHA was also ascertained for PVC modified with 10 wt% of filler.
    Źródło:
    Chemical and Process Engineering; 2022, 43, 3; 383--404
    0208-6425
    2300-1925
    Pojawia się w:
    Chemical and Process Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Synthesis and solubility of hopeite Zn3(PO4)2·4H2O
    Autorzy:
    Bajda, Tomasz
    Rogowska, Melania
    Pawłowska, Agnieszka
    Powiązania:
    https://bibliotekanauki.pl/articles/46220160.pdf
    Data publikacji:
    2023
    Wydawca:
    Polskie Towarzystwo Mineralogiczne
    Tematy:
    zinc
    phosphate
    apatite
    dissolution
    solubility product
    Opis:
    Minerals from the phosphate groups are used in environmental engineering as thermodynamically stable vehicles for heavy metals such as zinc. The hopeite Zn3(PO4)2·4H2O was synthesized and characterized by X-ray diffraction and scanning electron microscopy. The solubility of the hopeite was measured at 25°C. The average solubility product, log Ksp, for the reaction Zn3(PO4)2·4H2O ⇔ 3Zn2+ + 2PO4 3− + 4H2O at 25°C is –35.72 ± 0.03. The free energy of formation, ΔG°f ,298, calculated from this measured solubility product is –3597.4 ± 1.0 kJ mol−1. The immobilization of zinc in the hopeite structure offers the possibility of developing an effective method for removing Zn from wastewater, water and soils.
    Źródło:
    Mineralogia; 2023, 54, 1; 78-81
    1899-8291
    1899-8526
    Pojawia się w:
    Mineralogia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-11 z 11

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