Papers by Keyword: Calibration Curves

Abstract: Spray foam thermal insulations are one of new materials, which are now considerably applied in building practice and which are therefore also the aim of current research. In building practice is an effort to apply these materials to very rugged surfaces in both the external and the internal side of the structure. On the interior side, however, the application is connected with the risk of condensation, which is difficult to verify by the measurement. The contribution is focused just on the comparison of methods and measuring devices designed for immediate detection of moisture in the material of sprayed polyurethane foam. The samples of thermal insulation, which have undergone exposing of humidity in accordance with Czech Standards, were compared by the experimental assessment. The obtained results were compared and evaluated, while as expected, the moisture measuring of highly porous thermal insulation is significantly more difficult than the measuring of thermal insulations made of conventional homogeneous building materials.

Abstract: In this paper, a method of assay based on NMR (Nuclear Magnetic Resonance) measurements was developed. A protocol for the dissolution of gadolinium oxide cores and calibration curves were established for Nanoparticles gadolinium oxide. After optimization this method was used for several applications such as checking the concentration in colloids after dialysis or controlling the concentration and the form (oxides or free ions) of lanthanides after in vivo injection. The Experiments showed the samples did not present any suspension or deposit after the dissolution treatment, The concentrations calculated from relaxation measurements are very close to the concentrations measured . According to measure relaxation times T1 and T2, we can approximately determinate the gadolinium concentration. .

Abstract: Reproducibility of diffraction experiments provides an indication of data consistency with respect to different variables. The level of reproducibility and accuracy of the diffraction measurements is increased when using calibrated instruments. The paper presents most significant results of the 'Calibration Monitoring of Diffractometers', a project using a systematic approach to the Round Robin tests. At the present stage, the results suggest that instrumental performances and other related experimental effects in a diffraction the experiment can be summarised through 'characteristic curves'.