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Wyszukujesz frazę "Wiktorowicz, Krzysztof" wg kryterium: Autor


Wyświetlanie 1-7 z 7
Tytuł:
The use of artificial neural networks in supporting the annual training in 400 meter hurdles
Autorzy:
Iskra, Janusz
Przednowek, Krzysztof
Wiktorowicz, Krzysztof
Krzeszowski, Tomasz
Powiązania:
https://bibliotekanauki.pl/articles/1054811.pdf
Data publikacji:
2017
Wydawca:
Uniwersytet Szczeciński. Wydawnictwo Naukowe Uniwersytetu Szczecińskiego
Tematy:
400 meter hurdles
artificial neural networks
planning training loads
Opis:
This paper presents an evaluation of the annual cycle for 400 m hurdles using artificial neural networks. The analysis included 21 Polish national team hurdlers. In planning the annual cycle, 27 variables were used, where 5 variables describe the competitor and 22 variables represent the training loads. In the presented solution, the task of generating training loads for the assumed result were considered. The neural models were evaluated by cross-validation method. The smallest error was obtained for the radial basis function network with nine neurons in the hidden layer. The performed analysis shows that at each phase of training the structure of training loads is different.
Źródło:
Central European Journal of Sport Sciences and Medicine; 2017, 17, 1; 15-24
2300-9705
2353-2807
Pojawia się w:
Central European Journal of Sport Sciences and Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Spectral properties of phthalocyanines incorporated into resting and stimulated human peripheral blood cells.
Autorzy:
Waszkowiak, Aneta
Frąckowiak, Danuta
Wiktorowicz, Krzysztof
Miyake, Jun
Powiązania:
https://bibliotekanauki.pl/articles/1043724.pdf
Data publikacji:
2002
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
phthalocyanines
fluorescence
photodynamic therapy
human peripheral blood cells
Opis:
Human peripheral blood cells stimulated by phytohemagglutinin (which serve as a model of cancerous cells) and resting cells were incubated in dimethyl sulfoxide solutions of various phthalocyanines. In order to diminish the influence of atmospheric oxygen the cells were embedded in a polymer (polyvinyl alcohol) film. Fluorescence spectra of the samples were measured over two regions of excitation wavelengths: at 405 nm (predominant absorption of the cell material) and in the regions of strong absorption of phthalocyanines (at about 605 nm and 337 nm). The intrinsic emission of cell material became changed as a result both of cells' stimulation and of incubation of cells in dye solution. In most cases the stimulated cells when stained by dye exhibited higher long wavelength fluorescence intensity than resting cells. This suggests higher efficiency of dye incorporation into cancerous cells than into healthy cells. The absorption spectra of samples were also measured. The spectra of various phthalocyanines in incubation solvent, in polymer and in the cells embedded in polymer, were compared. The comparison of properties of the cells stimulated for different time periods enabled to establish the conditions of stimulation creating a population of cells incorporating a large number of sensitizing molecules.
Źródło:
Acta Biochimica Polonica; 2002, 49, 3; 633-641
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Incorporation of stilbazolium merocyanines into human leukocytes measured by flow cytometry
Autorzy:
Wiktorowicz, Krzysztof
Niedbalska, Małgorzata
Planner, Alfons
Frąckowiak, Danuta
Powiązania:
https://bibliotekanauki.pl/articles/1045224.pdf
Data publikacji:
1995
Wydawca:
Polskie Towarzystwo Biochemiczne
Źródło:
Acta Biochimica Polonica; 1995, 42, 3; 333-338
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The incorporation of various porphyrins into blood cells measured via flow cytometry, absorption and emission spectroscopy
Autorzy:
Ion, Rodica-Mariana
Planner, Alfons
Wiktorowicz, Krzysztof
Frąckowiak, Danuta
Powiązania:
https://bibliotekanauki.pl/articles/1044798.pdf
Data publikacji:
1998
Wydawca:
Polskie Towarzystwo Biochemiczne
Źródło:
Acta Biochimica Polonica; 1998, 45, 3; 833-845
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Preliminary studies of phthalocyanine sensitizers incorporated into human leukemia cells from two cell-lines.
Autorzy:
Wiktorowicz, Krzysztof
Cofta, Justyna
Dudkowiak, Alina
Waszkowiak, Aneta
Frąckowiak, Danuta
Powiązania:
https://bibliotekanauki.pl/articles/1041548.pdf
Data publikacji:
2004
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
MOLT 4 cells
fluorescence
photodynamic therapy
phthalocyanine
CCRF cells
Opis:
Three phthalocyanine dyes-sensitizers were incorporated into two types of human T leukemia cells from two cell-lines: CCRF and MOLT 4. The efficiency of the dye incorporation into cells and photochemical properties of stained cells were investigated using fluorescence spectroscopy. The dyes exhibited different properties in each of the two cell-lines. Small differences in cell membrane properties have a strong influence on the efficiency of dye incorporation and on the course of photodynamic reaction. It is suggested that, for a given patient, an optimal dye-sensitizer should be established before photodynamic treatment.
Źródło:
Acta Biochimica Polonica; 2004, 51, 3; 703-710
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Incorporation of stilbazolium merocyanines into resting and stimulated mononuclear leukocytes
Autorzy:
Frąckowiak, Danuta
Wiktorowicz, Krzysztof
Cofta, Justyna
Niedbaiska, Małgorzata
Latosińska, Magdalena
Powiązania:
https://bibliotekanauki.pl/articles/1045283.pdf
Data publikacji:
1995
Wydawca:
Polskie Towarzystwo Biochemiczne
Źródło:
Acta Biochimica Polonica; 1995, 42, 1; 61-68
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The interactions of phthalocyanines with stimulated and resting human peripheral blood mononuclear cells.
Autorzy:
Frąckowiak, Danuta
Waszkowiak, Aneta
Manikowski, Henryk
Ion, Rodica-Mariana
Cofta, Justyna
Wiktorowicz, Krzysztof
Powiązania:
https://bibliotekanauki.pl/articles/1044196.pdf
Data publikacji:
2001
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
blood mononuclear cells
photodynamic therapy
interaction with phthalocyanines
Opis:
The interactions of two metal-free phthalocyanines [(H2Pc) and Solar Pc (with four peripherical groups: SO2N(CH2CH2OH)2)] and of one metal substituted dye (CoPc) with resting and stimulated human peripheral blood mononuclear cells (PBMC) were compared. The absorption, fluorescence, photoacoustic and EPR spectra of both resting cells and cells stimulated by phytohaemagglutinin, incubated in dimethyl sulfoxide (DMSO) with very low or 95% water content and with or without dye addition, were measured. The fate of the light absorbed by the samples was investigated. It is known that singlet oxygen production is crucial for photodynamic action of dyes. Thermal deactivation and luminescence emission compete with this process, so investigation of these alternative paths of sensitizer deactivation provides information about photodynamic action. The incorporation of the investigated dyes into cells and the perturbation of the cell structure caused by the dyes, the incubation solvent and the activator were investigated by comparing the spectral properties of PBMC before and after stimulation and incubation. Incubation of the cells for 1 h in a solution of Solar Pc in 99.5% aqueous DMSO, resulted in an efficient dye incorporation which was highly selective. Solar Pc being introduced much more efficiently into stimulated cells than into resting cells.
Źródło:
Acta Biochimica Polonica; 2001, 48, 1; 257-269
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-7 z 7

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