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    Wyświetlanie 1-4 z 4
    Tytuł:
    System Dynamics Control through the Fractal Potential
    Autorzy:
    Timofte, A.
    Casian Botez, I.
    Scurtu, D.
    Agop, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1505327.pdf
    Data publikacji:
    2011-03
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    05.45.Df
    47.53.+n
    03.65.-w
    Opis:
    Implications of the fractal potential in the system dynamics using an extended scale relativity model assuming the fractal character of the particle movements, are established. So, in the dissipative approximation of the model it is shown that the fractal potential comes from the non-differentiability of the space-time, i.e. by means of imaginary part of a complex speed field. In the dispersive approximation of the same model, the fractalization of the differential part of the complex speed field induces a normalized fractal potential which controls through coherence the system dynamics. In such context the type I superconductivity results: the temperature dependences of the superconducting parameter, the accumulator effect etc.
    Źródło:
    Acta Physica Polonica A; 2011, 119, 3; 304-311
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Variability of zinc content in soils in a postglacial river valley – a geochemical landscape approach
    Zmienność zawartości cynku w glebach młodoglacjalnej doliny rzecznej w aspekcie krajobrazów geochemicznych
    Autorzy:
    Glinska-Lewczuk, K.
    Bieniek, A.
    Sowinski, P.
    Obolewski, K.
    Burandt, P.
    Timofte, C.M.
    Powiązania:
    https://bibliotekanauki.pl/articles/14152.pdf
    Data publikacji:
    2014
    Wydawca:
    Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
    Opis:
    The paper presents the research results on the relation between the contents of total zinc and its bioavailable form (Zn) and physicochemical properties of soil carried out along three catenas in the postglacial valley of the middle Łyna River, in NE Poland. We focused on topographical factors to determine the amount of Zn in the soil in relation to specific geochemical landscape types. The analyzed soil showed a relatively low level of soil pollution with Zn and did not exceed the threshold values for soil contamination with Zn. The average Zn content amounted to 45.75 mg kg -1 d.m. and ranged from 8.80 to 176.26 mg kg -1 d.m. The heavy metal content in the soil was related to organic matter and clay fraction, while it was inversely proportional to the share of sandy fraction. Distribution of zinc showed variability due to factors derived from topography, soil heterogeneity in the river valley as well as fluvial processes taking place within the floodplain. Different geochemical landscapes showed depressive trends in both Zn and Zn contents along the catenas. It diminished from eluvial to transeluvial landscapes and increased again to superaqual landscape. Depressions after former river channel were favorable for the Zn accumulation. The most abundant in Zn were upper horizons of Fluvisols in superaqual landscape (45.12 mg kg –1 ) filling overgrown and terrestialized floodplain lakes. The share of Zn a was the highest in organic horizons of Fluvisols and achieved 51.4% of total Zn. The nature and power of functional links between the heavy metal mobility and the soil properties were determined with multivariate statistics and GAM models. Applied ordination statistics confirmed its usefulness in soil factor analyses.
    Źródło:
    Journal of Elementology; 2014, 19, 2
    1644-2296
    Pojawia się w:
    Journal of Elementology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Studying the post-operatory and molecular modifications in the chronic pancreatitis and pancreatic cancer - The Importance of the micronutrients and pancreatic enzyme supplementation
    Autorzy:
    Timofte, D.
    Bintintan, V.
    Munteanu, I.
    Blaj, M.
    Anton, E.
    Ciobica, A.
    Surlin, V.
    Powiązania:
    https://bibliotekanauki.pl/articles/11168.pdf
    Data publikacji:
    2015
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Opis:
    The pancreatic cancer is a disorder with an exponentially increased incidence, especially over the last few years. Moreover, it is estimated that almost 95% of the patients with this disease are presenting to the hospital in the advanced and unresectable stages. Also, over the past few decades the development and advance of the surgical methods and techniques have improved, with the most of the operatory actions in the chronic pancreatitis and pancreatic cancer being represented by the whipple duodeno-pancreatectomy, which in fact represents the standard resection for tumors of the duodenum, as well as the hepatopancreatic ampulla of Vater, distal choledocus and the head of the pancreas. Moreover, it is important to mention that in these cases, after an extended resection and reconstruction of the upper gastrointestinal tract, the digestive physiology will be disrupted. In addition, previous studies have shown that patients can maintain a body mass index after surgery but often this will be lower than its preoperative value. Thus, considering the aforementioned aspects, in the present mini-review we were mainly interested in presenting also the relevance of the micronutrients such as iron, selenium, vitamin D and E, zinc or copper in this complicated area of research, as well as aspects regarding the correlations between immune function and micronutrients or the pancreatic enzyme supplementation.
    Źródło:
    International Letters of Natural Sciences; 2015, 47
    2300-9675
    Pojawia się w:
    International Letters of Natural Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Short review on the aggressive behaviour: genetical, biological aspects and oxytocin relevance
    Autorzy:
    Padurariu, M.
    Prepelita, R.
    Ciobica, A.
    Dobrin, R.
    Timofte, D.
    Stefanescu, C.
    Chirita, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/11903.pdf
    Data publikacji:
    2016
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Opis:
    In this mini-review we were interested in describing the main genetic, biological and mechanistic aspects of the aggressive behaviour in human patients and animal models. It seems that violent behaviour and impulsive traits present a multifactorial substrate, which is determined by genetic and non-genetic factors. Thus, aggressivity is regulated by brain regions such as the amygdala, which controls neural circuits for triggering defensive, aggressive or avoidant behaviour. Moreover, other brain structures such as the anterior cingulate cortex and prefrontal cortex regions could modulate circuits involved in aggression. Regarding the genetic aspects, we could mention the mutations in the monoamine oxidase or the polymorphisms of the genes involved in the metabolism of serotonin, such as tryptophan hydroxylase. Also, besides the low levels of serotonin metabolites, which seem to be associated with impulsive and aggressive traits, there are good evidences that deficiencies in glutamate transmission, as well as testosterone, vasopressin, hypochloesterolemia or oxytocin modifications could be related to the aggressive behaviour. Regarding oxytocin we present here in the last chapter the controversial results from the current literature regarding the various effects exhibited by oxytocin administration on the aggressive behavior, considering the increased interest in understanding the role of oxytocin on the main neuropsychiatric disorders.
    Źródło:
    International Letters of Natural Sciences; 2016, 52
    2300-9675
    Pojawia się w:
    International Letters of Natural Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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