Wszystkie pola: UV-C - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: The UV-C induced cell death in human malignant melanoma and normal fibroblasts
Autorzy:: Panek, A.
Wiecheć, A.
Powiązania:: https://bibliotekanauki.pl/articles/1065193.pdf
Data publikacji:: 2016-02
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 87.50.W-
87.14.gk
Opis:: Differences in cellular death between melanoma (Me45) cells and fibroblasts (CCL-110) were investigated after irradiation with UV-C (1.5-15 J/m²) and incubation for up to 48 h. The role of DNA double strand breaks in this process was assessed. Decrease of the Me45 cells viability began about 6 h after irradiation. The fibroblasts viability negatively correlated with the dose applied, since necrosis within this cell population began immediately after irradiation. The enhanced apoptosis of fibroblasts was observed between 6 and 24 h, while for melanoma cells, high level of apoptotic cells was still detected after 48 h. Statistically significant correlation between the percentage of apoptotic cells and DSBs was estimated for both cell lines. The melanoma cells responded differently to the UV-C radiation than did the fibroblasts. These differences were explained by deficiency of the necrotic processes as well as the delay of apoptotic melanoma response to UV-C damage.
Źródło:: Acta Physica Polonica A; 2016, 129, 2; 172-173
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: Magnetic Circular Dichroism in Electron Microscopy
Autorzy:: Rusz, J.
Novák, P.
Rubino, S.
Hébert, C.
Schattschneider, P.
Powiązania:: https://bibliotekanauki.pl/articles/1813944.pdf
Data publikacji:: 2008-01
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 75.40.Mg
78.20.Bh
79.20.Uv
Opis:: Although the analogies between the electron energy loss spectra and X-ray absorption spectra were recognized long ago, the possibility to observe the magnetic circular dichroism in the electron microscope was demonstrated only recently. This technique combines the atom specificity with the high spatial resolution of the transmission electron microscope. Being a very young technique, there are still many open questions concerning the optimization of the signal to noise ratio. In this paper we study the dichroic signal dependence on the sample thickness, acceleration voltage and incoming beam tilt angle of bcc-Fe and fcc-Ni.
Źródło:: Acta Physica Polonica A; 2008, 113, 1; 599-644
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 3.

Tytuł:: Inhomogeneous Magnetic Field Penetration in Superconducting Niobium Films
Autorzy:: Abal'osheva, I.
Abal'oshev, A.
Cieplak, M.
Zhu, L.
Chien, C.
Powiązania:: https://bibliotekanauki.pl/articles/1537190.pdf
Data publikacji:: 2010-08
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 74.25.Ha
74.25.Uv
74.70.Ad
Opis:: The peculiarities of magnetic field penetration in the form of fingering or dendritic instabilities are studied by magneto-optical technique in the niobium films of different thickness. It is observed that the reduction of Nb film thickness reduces the threshold field for instabilities, in agreement with the theoretical predictions. In addition, it is shown that the silver overlayer deposited on the top of Nb film leads also to the enhancement of instabilities, in marked contrast to the effect of gold or aluminum overlayers, which are known to suppress instabilities.
Źródło:: Acta Physica Polonica A; 2010, 118, 2; 396-398
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 4.

Tytuł:: Fluorescence Processes and Scintillation of CeF$\text{}_{3}$ Crystal Excited by UV and X-Ray Synchrotron Radiation
Autorzy:: Pédrini, C.
Belsky, A. N.
Moine, B.
Bouttet, D.
Powiązania:: https://bibliotekanauki.pl/articles/1929797.pdf
Data publikacji:: 1993-11
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 71.35.+z
78.55.Hx
78.70.En
Opis:: Photoluminescence properties of CeF$\text{}_{3}$ have been investigated. Two kinds of emitting centers have been identified: regular Ce$\text{}^{3+}$ sites exhibiting two close emission bands (285 and 300 nm) and a fast fluorescence (20 ns) and several physically different perturbed Ce$\text{}^{3+}$ sites giving rise to a broad emission band near 340 nm and a longer fluorescence (30-40 ns) the decay time of which varies with wavelength. An energy transfer occurs between these two kinds of centers. Scintillation properties have been studied under UV and X-ray excitation. The additional fast decay always observed at short time under ionizing radiation is interpreted by a temperature dependent luminescence quenching phenomenon due to high excitation density.
Źródło:: Acta Physica Polonica A; 1993, 84, 5; 953-957
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 5.

Tytuł:: In Vitro Analysis of AHPlus and MM-Seal by ESR and Thermoanalytical Methods
Autorzy:: Ceylan, Y.
Usta, A.
Usta, K.
Kont Cobankara, F.
Yildirim, C.
Birey, M.
Powiązania:: https://bibliotekanauki.pl/articles/1402525.pdf
Data publikacji:: 2015-08
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 87.66.Uv
36.20.Kd
39.30.+w
33.35.+r
Opis:: The free radicals and their concentration in resin materials may impact biocompatibility and polymerization properties of dental materials. The aim of this study was to determine whether there are free radicals and to obtain useful information about thermal stability of materials using electron spin resonance (ESR) spectroscopy, TGA (Thermogravimetry Analysis) and DTA (Differential Thermal Analysis) methods. Epoxy resin-based sealers AHPlus and MM-Seal samples, freshly mixed and set, were prepared to be analysed with ESR and thermal methods. The free radicals were found in dental materials. As radical concentration in AHPlus have changed very slowly, the concentration in MM-Seal have decreased dramatically. Also, MM-Seal was found to decompose in three steps with the increasing temperature, while decomposition of the AHPlus occurred in two steps.
Źródło:: Acta Physica Polonica A; 2015, 128, 2B; B-479-B-482
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

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