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    Wyświetlanie 1-3 z 3
    Tytuł:
    Opto-Magnetic Method for Epstein - Barr Virus and Cytomegalovirus Detection in Blood Plasma Samples
    Autorzy:
    Papić-Obradović, M.
    Kojić, D.
    Matija, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1537895.pdf
    Data publikacji:
    2010-05
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    33.20.Kf
    33.57.+c
    42.25.Ja
    42.30.-d
    42.70.Jk
    87.19.xd
    Opis:
    Motivated by characterization of paramagnetic materials (Al, Mn and Ti) and diamagnetic materials (Cu, C and Zn) by opto-magnetic method that is based on light-matter interaction using digital imaging, we present results of Epstein-Barr virus (EBV) and cytomegalovirus (CMV) detection in blood plasma. To investigate light-blood plasma interaction we use wavelength difference of diffuse white light and reflected polarized light in red and blue channels of digital images (opto-magnetic method). Digital images of samples are analyzed by spectral convolution algorithm for light-matter interaction analysis. Since opto-magnetic method can detect very small difference between normal and pathological tissue states it is advantageous in comparison with classical methods. Especially it is important for early detection of suspicious tissue states and detection of viral infection presence in plasma. We compared our results with results of standard biomedical test for EBV and CVM, as a reference, and found out for group of 40 samples significant correlation of 93. 6%.
    Źródło:
    Acta Physica Polonica A; 2010, 117, 5; 782-785
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Water Hydrogen Bonds Study by Opto-Magnetic Fingerprint Technique
    Autorzy:
    Koruga, Đ.
    Miljković, S.
    Ribar, S.
    Matija, L.
    Kojić, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/1537894.pdf
    Data publikacji:
    2010-05
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    33.20.Kf
    33.57.+c
    42.25.Ja
    42.30.-d
    42.50.Ex
    Opis:
    Hydrogen bond has dual property, classical (electrostatic interaction based on Coulomb's law) and quantum (wave function based on Schrödinger equation). Since Planck's constant is one of the main criteria for decision which process is quantum, or how much is close to be quantum, we use electrical and magnetic forces of valence electrons, as point of departure, to develop method for opto-magnetic fingerprint of matter. During the study of different type of matter we observed phenomena from spectral convolution data of digital images which characterize matter from both covalent and non-covalent bonding. Since water is matter that is most abundant with hydrogen bonds, we present results of 18.2 MΩ water investigation on different temperature and under influence of constant and variable magnetic fields by opto-magnetic method. Bearing in mind that Linus Pauling, in his book Nature of the Chemical Bond (Cornel University Press, 1939), for the first time presented the systematic concept of the hydrogen bond to the molecular world and its machinery, this paper is written in honor to him and 70th anniversary of one of the most important scientific paradigm.
    Źródło:
    Acta Physica Polonica A; 2010, 117, 5; 777-781
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Hyperelastic behavior of porcine aorta segment under extension-inflation tests fitted with various phenomenological models
    Autorzy:
    Veljković, D. Ž.
    Ranković, V. J.
    Pantović, S. B.
    Rosić, M. A.
    Kojić, M. R.
    Powiązania:
    https://bibliotekanauki.pl/articles/307016.pdf
    Data publikacji:
    2014
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    parametry mechaniczne
    aorta
    badania na zwierzętach
    identyfikacja
    material parameters identification
    mechanical properties
    porcine aorta
    strain energy function
    Opis:
    Most of hyperelastic models for the constitutive modeling of the typical mechanical behaviour of the arterial wall tissue in literature are based on the test data from different animals and arteries. This paper is concerned with the material parameter identification of several phenomenological hyperelastic models by fitting the data from five extension-inflation tests of the porcine aorta segment, carried out in our laboratory. A membrane approximation is used to compute stresses and strains achieved during experiments, with usual assumption of material incompressibility. Three orthotropic two-dimensional strain-energy functions, based on use of the Green-Lagrange strains, are fitted to the test data: the well-known Fung’s exponential model; the classical polynomial model with seven constants; and the logarithmic model; as also, two three-dimensional models are employed: polyconvex anisotropic exponential hyperelastic model and the convex isotropic exponential rubber-like hyperelastic constitutive law depending on the first invariant of the right Cauchy-Green deformation tensor. It is found that isotropic model overestimates values of stresses in axial, and underestimates values of stresses in circumferential direction of artery segment, due to pronounced tissue anisotropy. Also, all considered two-dimensional models give good and similar prediction, while the polyconvex model demonstrates slightly lower performance in the axial direction of artery.
    Źródło:
    Acta of Bioengineering and Biomechanics; 2014, 16, 3; 37-45
    1509-409X
    2450-6303
    Pojawia się w:
    Acta of Bioengineering and Biomechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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