Figure S4.Figure S4: MSCs intracellular calcium measurement. The results are expressed as mean ± SD of four independent experiments. Comparisons among groups did not show statistical differences.
External Raman standard for absolute intensity and concentration measurements Rev. Sci. Instrum. 76, 033108 (2005); 10.1063/1.1866952 A secondary electron emission detector for measuring the intensity of synchrotron radiation Rev. Sci. Instrum. 76, 033302 (2005); 10.1063/1.1866648 Quartz lamp characterization for quantitative thermal nondestructive evaluation AIP Conf.Abstract. This work presents a study comparing the drift during seasoning of four of lOOOW FEL-type lamp regarding the use of theses lamps as secondary luminous intensity standard. Three of these lamps are manufactured by Philips and the other lamp is manufactured by ORIEL. The lamps seasoning takes normally 30 hours and during the seasoning period relative drift of the lamp luminous intensity, lamp current and voltage are measured at each 5 minutes. The correlated color temperature of the lamps is measured at the end of lamp seasoning period. The luminous intensity is measured using a 4 V2 digits photometer with thermal stabilized detector head, the lamp voltage is measured using a 6 V2 digits voltmeter and the current is measured and controlled by a calibrated current power source shunt. The lamp sockets are adapted to a cinematic positioning device which is placed on an adjustable mounting device. A cross target is used as reference for alignment with a He-Ne Laser. In the P' group of three lamps from Philips the minimum relative drift in luminous intensity per hour at the end of seasoning period was 0,0075 percent and the maximum relative drift was 0,02 percent. Voltage relative drift of the lamps were very similar in shape on the last few hours of the seasoning period, but different for one lamp at the beginning. The lamp current remained practically constant at 8 A which was the current adjusted in the current power source. One lamp had the luminous intensity calibrated by the National Institute of Metrology from Argentina and is used as a transfer standard for the other lamps.
O presente trabalho apresenta a caracterização de um espectroradiômetro considerando a calibração nas escalas de comprimento de onda e irradiância espectral, juntamente com a avaliação de sua linearidade e a influência da variação angular na geometria de medição e da polarização da luz incidente. Os resultados mostram que para a aplicação na avaliação de fototerapia neonatal a calibração da escala de irradiância é crítica com variações entre valores teóricos e medidos de até 10 % e a avaliação da linearidade obtida foi 4 % por ordem de grandeza da irradiância, o que demonstra necessidade da caracterização do espectroradiômetro incluindo sua calibração para correta avaliação da irradiância de fototerapia neonatal.
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