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Wyszukujesz frazę "Pietruszka, M." wg kryterium: Wszystkie pola

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    Tytuł:
    Simple method to estimate cell wall extensibility coefficient by using only two cardinal numbers
    Autorzy:
    Pietruszka, M
    Powiązania:
    https://bibliotekanauki.pl/articles/58740.pdf
    Data publikacji:
    2009
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    cell wall
    plant cell
    growing plant
    temperature
    extensibility coefficient
    Opis:
    In this short communication we consider the extensibility properties of the cell wall. This is accomplished by a heuristically motivated equation for the expanding volume of the cell. The experimentally determined characteristic time t0 and temperature T0 are the only numbers required for evaluating the effective yielding coefficient Ф(t, T) in the respective time and temperature domains.
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2009, 78, 4; 269-270
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Mathematical model for tissue stresses in growing plant cells and organs
    Autorzy:
    Lewicka, S
    Pietruszka, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/57317.pdf
    Data publikacji:
    2009
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    growing plant
    plant cell
    mathematical model
    tissue stress
    equilibrium equation
    plant organ
    Opis:
    In this study we propose a simple mathematical model based on the equilibrium equation for the materials deformed elastically. Owing to the turgor pressure of the cells, the peripheral walls of the outer tissue are under tension, while the extensible inner tissue is under compression. This well known properties of growing multicellular plant organs can be derived from the equation for equilibrium. The analytic solutions may serve as a good starting point for modeling the growth of a single plant cell or an organ.
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2009, 78, 1; 19-23
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Thermodynamics of irreversible plant cell growth
    Autorzy:
    Pietruszka, M
    Lewicka, S.
    Pazurkiewicz-Kocot, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/58662.pdf
    Data publikacji:
    2006
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    thermodynamics
    irreversible process
    plant cell
    plant growth
    cell wall
    yielding
    growth stimulator
    growth inhibitor
    modified growth equation
    Opis:
    The time-irreversible cell enlargement of plant cells at a constant temperature results from two independent physical processes, e.g. water absorption and cell wall yielding. In such a model cell growth starts with reduction in wall stress because of irreversible extension of the wall. The water absorption and physical expansion are spontaneous consequences of this initial modification of the cell wall (the juvenile cell vacuolate, takes up water and expands). In this model the irreversible aspect of growth arises from the extension of the cell wall. Such theory expressed quantitatively by time-dependent growth equation was elaborated by Lockhart in the 60's.The growth equation omit however a very important factor, namely the environmental temperature at which the plant cells grow. In this paper we put forward a simple phenomenological model which introduces into the growth equation the notion of temperature. Moreover, we introduce into the modified growth equation the possible influence of external growth stimulator or inhibitor (phytohormones or abiotic factors). In the presence of such external perturbations two possible theoretical solutions have been found: the linear reaction to the application of growth hormones/abiotic factors and the non-linear one. Both solutions reflect and predict two different experimental conditions, respectively (growth at constant or increasing concentration of stimulator/inhibitor). The non-linear solution reflects a common situation interesting from an environmental pollution point of view e.g. the influence of increasing (with time) concentration of toxins on plant growth. Having obtained temperature modified growth equations we can draw further qualitative and, especially, quantitative conclusions about the mechanical properties of the cell wall itself. This also concerns a new and interesting result obtained in our model: We have calculated the magnitude of the cell wall yielding coefficient (T) [m3 J-1•s-1] in function of temperature which has acquired reasonable numerical value throughout.
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2006, 75, 3; 183-190
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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