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Optical Investigation of Hematocrit Level in Human Blood

100%
Jedrzejewska-Szczerska M., Gnyba M.
Acta Physica Polonica A
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2011
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vol. 120
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issue 4
642-646
EN
In this paper use of selected optical methods of a hematocrit measurement has been presented. Elaborated methods have numerous advantages: relatively simple configurations, potentially low cost and high resolution. Investigation confirmed their ability to determine the hematocrit value with appropriate measurement accuracy. Furthermore, simultaneous use of complementary optical methods can substantially increase measurement reliability, because low-coherence interferometric measurement is based on physical (mainly optical) properties of the investigated object, while Raman spectroscopy is based on study of its molecular composition.
2
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Low-Coherence Fibre-Optic Interferometric Sensors

81%
Jedrzejewska-Szczerska M., Gnyba M., Kosmowski B.
Acta Physica Polonica A
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2011
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vol. 120
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issue 4
621-624
EN
In this paper low-coherence fibre-optic sensors based on the Fabry-Perot and Michelson interferometer, which were designed and elaborated at our laboratory, are shown. We present results of investigation of the fibre-optic sensors working in both configurations. These results allowed us to compare properties of sensors working in both configurations. The theoretical analysis and experimental results made us possible to select best construction, which was implemented in low-coherence fibre-optic sensors of refractive index.
3
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Portable Raman spectrometer - design rules and applications

81%
Gnyba M., Wierzba P., Smulko J., Kwiatkowski A.
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2011
|
issue 3
4
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Detection of illicit chemicals by portable Raman spectrometer

81%
Smulko J., Kwiatkowski A., Gnyba M.
|
2011
|
issue 4
5
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Optimization of Polycrystalline CVD Diamond Seeding with the Use of sp³/sp² Raman Band Ratio

61%
Golunski L., Sobaszek M., Gardas M., Gnyba M., Bogdanowicz R., Ficek M., Plotka P.
Acta Physica Polonica A
|
2015
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vol. 128
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issue 1
136-140
EN
The influence of various nanodiamond colloids used for seeding nondiamond substrates in microwave plasma enhanced chemical vapour deposition diamond process was investigated. Colloids based on deionized water, isopropanol alcohol and dimethyl sulfoxide (DMSO) were used with different grain size dispersion: 150, 400 and 35 nm, respectively. The influence of growth time was also taken into consideration and bias enhanced nucleation. Microcrystalline diamond films were deposited on the seeded substrates in microwave plasma chemical vapour deposition using hydrogen-methane gas mixture. Seeding efficiency was investigated by means of scanning electron microscopy and Raman spectroscopy. Authors defined the new factor called as diamond ideality factor (di) which can give a quick estimation of quality of film and relative sp³ content. Few main peaks were identified at the following wave numbers: diamond sp³ peak 1332 cm^{-1}, D band peak 1355 cm^{-1}, C-H bending peak 1440-1480 cm^{-1} and G band peak 1560 cm^{-1}. The best di was achieved for DMSO based colloid in all cases. The application of bias enhanced nucleation increases the diamond crystals size and the sp³/sp² ratio.
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