Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

English (EN)·Polski (PL)·Yкраїнський (UK)
Przejdź do strony domowej biblioteki Centralna Biblioteka Wojskowa Link otwiera się w nowym oknie Logo biblioteki Prolib Integro - strona głównaCentralna Biblioteka Wojskowa

Wyszukujesz frazę "87.64.M-" wg kryterium: Wszystkie pola

  Lista filtrów
Wyrównaj
    Wyświetlanie 1-9 z 9
    Tytuł:
    Fluorescence Mapping of PCP Light-Harvesting Complexes Coupled to Silver Nanowires
    Autorzy:
    Krajnik, B.
    Piatkowski, D.
    Olejnik, M.
    Czechowski, N.
    Hofmann, E.
    Heiss, W.
    Mackowski, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/1419489.pdf
    Data publikacji:
    2012-08
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    87.64.kv
    42.62.Fi
    81.07.Pr
    87.64.M-
    Opis:
    In this work we demonstrate confocal fluorescence imaging of hybrid nanostructures composed of silver nanowires and peridinin-chlorophyll-protein light-harvesting complexes. The length of silver nanowires, which reaches 10 μm, allows for determination of the nanowire position and consequently direct correlation with the fluorescence image. In this way we probe the influence of plasmon induced electromagnetic field on the fluorescence of light-harvesting complexes. When the nanowires are spaced from the light-harvesting complexes by a 10 nm thick dielectric layer, we observe a fluorescence enhancement, which depends upon the laser excitation wavelength. The measured enhancement values are 2.5 and 1.9 for 405 nm and 485 nm, respectively. Larger enhancement for the 405 nm excitation is attributed to direct creation of plasmon excitations in the silver nanowires.
    Źródło:
    Acta Physica Polonica A; 2012, 122, 2; 259-262
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Determination of the Protein-Binding Properties of Camptothecins by Means of Optical Spectroscopy Methods
    Autorzy:
    Ziomkowska, B.
    Cyrankiewicz, M.
    Wybranowski, T.
    Kruszewski, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/1197530.pdf
    Data publikacji:
    2014-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    87.64.K-
    87.64.kv
    87.15.kp
    02.50.Sk
    Opis:
    Optical spectroscopy methods are widely used in studies of drugs. The affinity of camptothecins - anticancer agents - to human serum albumin (HSA) was determined in this work. Camptothecins (CPTs) exist in two forms: active lactone and open ring inactive carboxylate. In blood, the hydrolysis process of lactone form occurs which leads to deactivation of CPTs. Research is being done on biophysical properties of synthesized CPT compounds, in particular on binding to albumin. The affinity to plasma proteins is an important determinant of stability of CPTs in blood. The following analogues of CPT were tested in this paper: irinotecan, SN-38, topotecan, and 9-amino camptothecin. Using the method of fluorescence anisotropy measurement, the association constants of the studied compounds to HSA were determined. The authors attempted to determine the deactivation rate of topotecan in HSA solution using Principal Component Analysis and Factor Analysis of absorption spectra recorded during hydrolysis process of lactone form.
    Źródło:
    Acta Physica Polonica A; 2014, 125, 4A; A-61-A-65
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Interactions of Photosystem I with Plasmonic nanostructures
    Autorzy:
    Hussels, M.
    Nieder, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1419504.pdf
    Data publikacji:
    2012-08
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    73.20.Mf
    87.64.kv
    87.80.Nj
    Opis:
    The plasmonic interaction effects of various nanostructures on the fluorescence properties of photosystem I as found by single-molecule spectroscopy are summarized. The used nanostructures are spherical Au nanoparticles, silver island films as well as hexagonal arrays of nanometer-sized Au- and Ag-triangles (the Fischer patterns). The fluorescence emission of photosystem I is intensified due to coupling with these nanostructures. For single photosystem I complexes, enhancement factors of up to 37 were observed. The average enhancements vary between 2.2 for Au Fischer pattern and 9 for spherical Au nanoparticles. The enhancement of the fluorescence of photosystem I demonstrates in all cases a strong wavelength dependence. This wavelength dependence can be explained by the spatially largely extended multichromophore composition of photosystem I complexes. From the viewpoint of the usability of these nanostructures for spectroscopic signal enhancement, the Fischer patterns are beneficial, due to their very low autoluminescence.
    Źródło:
    Acta Physica Polonica A; 2012, 122, 2; 269-274
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Gold Nanoparticles with Elongated Shapes: Synthesis and Optical Properties
    Autorzy:
    Olejnik, M.
    Agarwal, A.
    Zaleszczyk, W.
    Kotov, N.
    Mackowski, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/1419540.pdf
    Data publikacji:
    2012-08
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    81.07.-b
    81.07.Pr
    87.64.kv
    87.64.K-
    Opis:
    We use a seed-mediated growth to fabricate gold nanorods in water solution. By changing the amount of silver salt we demonstrate the control of aspect ratio of the obtained rods. The microscopic and spectroscopic analyses provide ways to characterize the morphology and the optical properties of the gold nanorods. Nanorods synthesized using this approach feature length of the order of 50-60 nm, which translates into longitudinal plasmon resonances in the near infrared spectrum region.
    Źródło:
    Acta Physica Polonica A; 2012, 122, 2; 346-349
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Laser- and Light-Induced Autofluorescence Spectroscopy of Human Skin in Dependence on Excitation Wavelengths
    Autorzy:
    Bliznakova, I.
    Borisova, E.
    Avramov, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/2047898.pdf
    Data publikacji:
    2007-11
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    42.72.Bj
    87.15.M-
    87.64.kv
    Opis:
    Human skin contains various types of native fluorophores and absorbers with unique absorption and emission spectra, different quantum efficiency, concentration and spatial distribution within the skin. Autofluorescence spectroscopy is applied as diagnostic tool for cutaneous tumor detection that increases the importance of evaluation of natural existing fluorophores and unification of data for given class of pathologies. In the current study, several excitation sources in the region 337-405 nm are applied, to achieve information about typical autofluorescent properties of normal human skin.
    Źródło:
    Acta Physica Polonica A; 2007, 112, 5; 1131-1136
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    X-ray Diffraction and Elemental Analysis of Medical and Environmental Samples
    Autorzy:
    Bielecka, K.
    Kurtek, W.
    Banaś, D.
    Kubala-Kukuś, A.
    Braziewicz, J.
    Majewska, U.
    Pajek, M.
    Wudarczyk-Moćko, J.
    Stabrawa, I.
    Powiązania:
    https://bibliotekanauki.pl/articles/1197663.pdf
    Data publikacji:
    2014-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    78.70.En
    87.64.Bx
    32.30.Rj
    87.64.kv
    Opis:
    The results of the elemental and chemical composition analysis of human medical samples (blood, serum, hair, urine, tooth, kidney stones, gallstones) and environmental samples (slag, cereal, vegetables, flour, pork bones, pork meat, fish) are presented. The analysis were performed by application of the total reflection X-ray fluorescence, wavelength dispersive X-ray fluorescence and X-ray powder diffraction methods. With X-ray fluorescence methods the following elements were identified: O, Na, Mg, Al, Si, P, S, Cl, K, Ca, Ti, Mn, Fe, Ni, Cu, Zn, Se, Br, Rb, Sr, Zr, I, Ba, and Pb, whose concentrations were from a few ng/g to tens of percent. For some samples the elemental analysis was extended by X-ray powder diffraction measurements. With this method the chemical composition was determined. In the paper the experimental setups, methodology of samples preparation and methods of carrying out the measurements are described. As an example the X-ray spectra registered for gallstone sample are discussed in detail. Finally, the results of X-ray diffraction and elemental analysis for selected medical and environmental samples are summarized.
    Źródło:
    Acta Physica Polonica A; 2014, 125, 4; 911-918
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    X-Ray Fluorescence Techniques in Medical Applications: Reference Values of Elements in Human Serum, Urine and Hair
    Autorzy:
    Majewska, U.
    Banaś, D.
    Braziewicz, J.
    Kubala-Kukuś, A.
    Pajek, M.
    Sychowska, I.
    Wudarczyk-Moćko, J.
    Antczak, G.
    Borkowska, B.
    Góźdź, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/1197643.pdf
    Data publikacji:
    2014-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    32.30.Rj
    87.64.kd
    87.64.kv
    Opis:
    The aim of undertaken long-term studies of the elemental composition of human serum, urine, and hair is to define reference values of elements concentration. For this purpose the total reflection X-ray fluorescence method was applied to determination of several elements concentration in human serum, urine and hair (S, K, Ca, Fe, Cu, Zn, Br, P, Cr, and Rb in serum samples; Fe, Cu, Zn, Rb, Cr, Mn, and Sr in urine samples; S, K, Ca, Fe, Cu, Br, Zn, Cl, Ti, Cr, Mn, Ni, and Se in hair samples) in the range of concentration from ppb to several hundred ppm. The method of selection of the control group, the experimental setup and its calibration procedure are described. We also present sample preparation methods and procedure of measurements.
    Źródło:
    Acta Physica Polonica A; 2014, 125, 4; 864-868
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Optical Biopsy Method for Breast Cancer Diagnosis Based on Artificial Neural Network Classification οf Fluorescence Landscape Data
    Autorzy:
    Dramićanin, T.
    Zeković, I.
    Dimitrijević, B.
    Ribar, S.
    Dramićanin, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1795706.pdf
    Data publikacji:
    2009-10
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    87.64.kv
    84.35.+i
    87.19.xj
    33.50.-j
    Opis:
    Supervised self-organizing map, a type of artificial neural network, is applied for classification of human breast tissue samples utilizing data obtained from fluorescence landscape measurements. Female breast tissue samples were taken soon after the surgical resection, identified and stored at -80°C until fluorescence measurements. From fluorescence landscapes obtained in UV-VIS region spectral features showing statistically significant differences between malignant and normal samples are identified and further quantified to serve as a training input to neural network. Additional set of samples was used as a test group input to trained network in order to evaluate performance of proposed optical biopsy method. Classification sensitivity of 83.9% and specificity of 88.9% are found.
    Źródło:
    Acta Physica Polonica A; 2009, 116, 4; 690-692
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of Various Impurities on the Optical Properties of YbF$\text{}_{3}$-Doped CaF$\text{}_{2}$ Crystals
    Autorzy:
    Stef, M.
    Pruna, A.
    Pecingina-Garjoaba, N.
    Nicoara, I.
    Powiązania:
    https://bibliotekanauki.pl/articles/2047870.pdf
    Data publikacji:
    2007-11
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    52.25.Os
    76.30.Kg
    87.64.kv
    42.55.Rz
    Opis:
    Calcium fluoride crystals doped with YbF$\text{}_{3}$ and co-doped with LiF and NaF were grown using the vertical Bridgman method. Several of rare-earth ions (such as Eu, Sm, Ho, Tm, and Yb) can be stabilized in the divalent state in the CaF$\text{}_{2}$. The change of valence was attained by various methods. The optical absorption spectra reveal the characteristic absorption bands of the Yb$\text{}^{3+}$ and Yb$\text{}^{2+}$ ions. This means that the developed crystal growth process achieves a good Yb$\text{}^{3+}$ to Yb$\text{}^{2+}$ conversion in the as-grown crystals. The influence of other impurities, such as Na$\text{}^{+}$ or Li$\text{}^{+}$, on the absorption and emission spectrum of YbF$\text{}_{3}$-doped CaF$\text{}_{2}$ was studied. The Li$\text{}^{+}$ and Na$\text{}^{+}$ ions drastically decrease the absorption coefficient of the Yb$\text{}^{2+}$ ions in the UV band and the emission intensity by excitation in 230 nm.
    Źródło:
    Acta Physica Polonica A; 2007, 112, 5; 1007-1012
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-9 z 9

      Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies