![]() Fluorescence properties and extinction coefficients were measured at a specific laser-excitation power, while the loss of fluorescence by photobleaching was measured at several laser-excitation powers.ĭata were collected from aqueous solutions obtained by adding dropwise an eosin based pharmaceutical solution (disodium eosin 2.00 g, chlorphenesine, pentylene glycol, water 100 mL) into 100 mL of distilled water under magnetic stirrer. The loss of fluorescence by photobleaching and extinction coefficients were measured using a high-speed Photron Fastcam Mini AX50 camera.ĭata include dynamic viscosities, surface tension, pH, extinction coefficients, and fluorescence properties of eosin yellowish aqueous solution at various controlled temperatures and concentrations. Fluorescence spectra, from 500–750 nm under an excitation wavelength at 532 nm (Verdi-V5, Coherent), were acquired on a Ocean Optics USB2000+XR1-ES spectrometer. Measurement of pH were performed using a CG 820 microprocessor-based pH-Meter (Schott Geräte), a 90450 pH electrode (Bioblock) and a thermocouple type K (NiCr-Ni, 1/2 DIN IEC 584 class 2). ![]() Surface tension were measured by a drop shape analyzer DSA25 with the pendant drop method (Krüss). The dynamic viscosity measurements were carried out using a rotational rheometer D-HR2 (TA Instruments). ![]() Multiphase flows and optical techniques for water flow visualization.ĭata include dynamic viscosities, surface tension, pH and fluorescence properties of eosin yellowish aqueous solutions.
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