Ves-Matic Cube 200 is fully automated analyzer that performs erythrocyte sedimentation rate (ESR) measurement using the standard ethylenediaminetetraacetic acid blood sample tube, thus markedly reducing the analytical time and avoiding the need for an extra blood sample. The aim of this study was to assess the automatic Ves-Matic Cube 200 system for the measurement of ESR in comparison with the original International Council for Standardization in Hematology reference method (Westergren). The evaluation comprised accuracy which was established using a 95% confidence interval (CI) for the mean difference between Ves-Matic Cube 200 and Westergren method (mean of difference: 0.47+/-6.84 mm/h; 95% CI: -0.376 to 1.325 mm/h), within-run imprecision for samples with ESR values of 9, 42 and 95 mm/h (coefficients of variation: 9.19%, 13.88% and 5.66%, respectively) and method comparison (rho=0.95; Passing-Bablok regression equation: Y=-0.0435+1.0435 X; bias: -0.5; limits of agreement: -13.9 to 12.9). Stability was estimated after 24 h storage either at 4 degrees C and room temperature (mean of differences: -1.91 mm/h; 95% CI: -4.852 to 1.037 mm/h and mean of differences: -12.48 mm/h; 95% CI: -16.580 to -8.390 mm/h, respectively). The obtained results suggest that the Ves-Matic Cube 200 automated analyzer is reliable system for the measurement of ESR in clinical laboratories.
Y3Al5O12 doped with 0.8%wt.Nd (Nd:YAG) single crystals were grown by the Czochralski technique under an argon atmosphere. The conditions for growing the Nd:YAG single crystals were calculated by using a combination of Reynolds and Grashof numbers. The critical crystal diameter and the critical rate of rotation were calculated from the hydrodynamics of the melt. The crystal diameter Dc=1.5 cm remained constant during the crystal growth while the critical rate of rotation changed from ?c=38 rpm after necking to ?c=13 rpm at the end of the crystal. The value of the rate of crystal growth was experimentally found to be 0.8?1.0 mm/h. According to our previous experiments, it was confirmed that 20 min exposure to conc. H3PO4 at 603 K was suitable for chemical polishing. Also, one-hour exposure to conc. H3PO4 at 493 K was found to be suitable for etching. The lattice parameter a=1.201 (1) nm was determined by X-ray powder diffraction. The obtained results are discussed and compared with published data.
Single crystals of LiNbO3 were grown by the Czochralski technique in an air
atmosphere. The critical diameter and the critical rate of rotation were
calculated. X-Ray measurements of the powder were carried out to obtain the
lattice parameters.The optical constants were calculated by Kramers-Kronig
analysis of reflectance data. The optical properties of LiNbO3 single
crystals were studied for samples grown in an air atmosphere to
investigate the influence of air on the optical properties of the formed
crystals. A peak due to OH. gtroups appears in the transmission spectrum at
3385 cm -1. It was still present after annealing in an air atmosphere at
temperature up to 873 K, but it was no longer detectable after annealing at
1473 K in an electric field. Thick films of the high-temperature
superconductor YBa2Cu3O7 (Ag) were obtained on plates of LiNbO3 single
crystals. The obtained results are discussed and compared with published
data.
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