On May 13, 2025, at 14:30 o'clock, the defense of the dissertation work by Hakima Ahmad qizi Alikulova on the topic “Determination of the Density Indicator of Petroleum Products and the Creation of Standard Liquid Samples for Density Determination Used in the Calibration and Comparison of Measuring Instruments” was held in the specialty 02.00.07 – Chemistry and Technology of Composite, Paint-and-Varnish, and Rubber Materials (Technical Sciences) for the degree of Doctor of Philosophy (PhD) in Technical Sciences.