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    Wyświetlanie 1-3 z 3
    Tytuł:
    Basic energetic parameters of Acanthamoeba castellanii mitochondria and their resistance to oxidative stress
    Autorzy:
    Jarmuszkiewicz, Wieslawa
    Antos-Krzeminska, Nina
    Drachal-Chrul, Danuta
    Matkovic, Karolina
    Nobik, Wioletta
    Pieńkowska, Joanna
    Swida, Aleksandra
    Woyda-Ploszczyca, Andrzej
    Budzinska, Malgorzata
    Powiązania:
    https://bibliotekanauki.pl/articles/1040753.pdf
    Data publikacji:
    2008
    Wydawca:
    Polskie Towarzystwo Biochemiczne
    Tematy:
    Acanthamoeba castellanii
    mitochondria
    hydrogen peroxide
    oxidative stress
    Opis:
    The purpose of this study was establishing the basic energetic parameters of amoeba Acanthamoeba castellanii mitochondria respiring with malate and their response to oxidative stress caused by hydrogen peroxide in the presence of Fe2+ ions. It appeared that, contrary to a previous report (Trocha LK, Stobienia O (2007) Acta Biochim Polon 54: 797), H2O2-treated mitochondria of A. castellanii did not display any substantial impairment. No marked changes in cytochrome pathway activity were found, as in the presence of an inhibitor of alternative oxidase no effects were observed on the rates of uncoupled and phosphorylating respiration and on coupling parameters. Only in the absence of the alternative oxidase inhibitor, non-phosphorylating respiration progressively decreased with increasing concentration of H2O2, while the coupling parameters (respiratory control ratio and ADP/O ratio) slightly improved, which may indicate some inactivation of the alternative oxidase. Moreover, our results show no change in membrane potential, Ca2+ uptake and accumulation ability, mitochondrial outer membrane integrity and cytochrome c release for 0.5-25 mM H2O2-treated versus control (H2O2-untreated) mitochondria. These results indicate that short (5 min) incubation of A. castellanii mitochondria with H2O2 in the presence of Fe2+ does not damage their basic energetics.
    Źródło:
    Acta Biochimica Polonica; 2008, 55, 2; 349-356
    0001-527X
    Pojawia się w:
    Acta Biochimica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Being Positive. Approaching Career Design from the Perspective of Positive Psychology
    Autorzy:
    Klimka, Małgorzata
    Budzińska, Grażyna
    Powiązania:
    https://bibliotekanauki.pl/articles/628771.pdf
    Data publikacji:
    2015
    Wydawca:
    Fundacja Pro Scientia Publica
    Tematy:
    Career design, positive psychology, strength, virtues
    Opis:
    Constructing a career path based upon positive personal potential and positive individual resources is a significant factor for professional development of employees  and  their success on today’s labour market. A satisfying career, an inherent element of personal well-being and good life, is linked with an ability to explore and reinforce signature strengths. In order to effectively design programmes which could support young people who are preparing to enter a job market,  it is essential to acquire knowledge about values and character strengths and their perceptions among young people living in Poland and abroad. The article presents comparative analysis of signature strengths perceptions among young people in different cultures and discusses the significance of the most striking differences.
    Źródło:
    Journal of Education Culture and Society; 2015, 6, 1; 89-100
    2081-1640
    Pojawia się w:
    Journal of Education Culture and Society
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Modulation of the voltage-dependent anion-selective channel by cytoplasmic proteins from wild type and the channel depleted cells of Saccharomyces cerevisiae.
    Autorzy:
    Kmita, Hanna
    Budzińska, Małgorzata
    Stobienia, Olgierd
    Powiązania:
    https://bibliotekanauki.pl/articles/1043619.pdf
    Data publikacji:
    2003
    Wydawca:
    Polskie Towarzystwo Biochemiczne
    Tematy:
    VDAC-depleted mutant
    reconstituted system
    Saccharomyces cerevisiae
    voltage dependent anion selective channel (VDAC)
    mitochondria
    yeast
    Opis:
    It is well known that effective exchange of metabolites between mitochondria and the cytoplasm is essential for cell physiology. The key step of the exchange is transport across the mitochondrial outer membrane, which is supported by the voltage-dependent anion-selective channel (VDAC). Therefore, it is clear that the permeability of VDAC must be regulated to adjust its activity to the actual cell needs. VDAC-modulating activities, often referred to as the VDAC modulator, were identified in the intermembrane space of different organism mitochondria but the responsible protein(s) has not been identified as yet. Because the VDAC modulator was reported to act on VDAC of intact mitochondria when added to the cytoplasmic side it has been speculated that a similar modulating activity might be present in the cytoplasm. To check the speculation we used mitochondria of the yeast Saccharomyces cerevisiae as they constitute a perfect model to study VDAC modulation. The mitochondria contain only a single isoform of VDAC and it is possible to obtain viable mutants devoid of the channel (Δpor1). Moreover, we have recently characterised a VDAC-modulating activity located in the intermembrane space of wild type and Δpor1 S. cerevisiae mitochondria. Here, we report that the cytoplasm of wild type and Δpor1 cells of S. cerevisiae contains a VDAC-modulating activity as measured in a reconstituted system and with intact mitochondria. Since quantitative differences were observed between the modulating fractions isolated from wild type and Δpor1 cells when they were studied with intact wild type mitochondria as well as by protein electrophoresis it might be concluded that VDAC may influence the properties of the involved cytoplasmic proteins. Moreover, the VDAC-modulating activity in the cytoplasm differs distinctly from that reported for the mitochondrial intermembrane space. Nevertheless, both these activities may contribute efficiently to VDAC regulation. Thus, the identification of the proteins is very important.
    Źródło:
    Acta Biochimica Polonica; 2003, 50, 2; 415-424
    0001-527X
    Pojawia się w:
    Acta Biochimica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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