Eye tracker makes it possible to see where and how the person is looking. During the analysis of previously collected eye-tracking data my attention was drawn to two school students whose English language communicative skills were on different levels and that is why I assumed they should work with the English textbook material in a different way. The aim of the article is to show not noticed at the first sight differences in their way of working with the English textbook material.

The article presents the results of the second part of an eye-tracking study conducted on Polish secondary school students working with a textbook for learning English. 20 dyslexic and 20 non- dyslexic school students worked with two sets of materials that had different graphic layouts but the same content. Their eye movements were recorded. The analysed data show that the arrangement of the material and images on the textbook page influence both the way the students (especially dyslexic ones) work with the book and their results.

The objective of this project was to evaluate and measure the viewability of various kinds of ads in the daily press. A total of 63 ads was assessed, including 17 in Metrocafe, 28 in Gazeta Wyborcza, and 18 in the Super Express. The analysis of the data made it possible to assess the effectiveness of various formats of press advertising.

In this study, non-sintered ceramsite was prepared using coal gasification coarse slag obtained from a methanol plant. The basic performance and heavy metal leaching toxicity were analyzed. The results showed that seven out of nine non-sintered ceramsite groups were in accordance with the national standard of compressive strength (5 MPa), while only three groups met the national standard of water absorption index of less than 22%. The heavy metal concentrations in these three groups were found to be lower than that specified in National Class IV of surface water environment standards. The concentration of Cr was found to be 16.45 μg/L, which represents only 1% of the IV standard. The optimum mixing ratio, which showed high compressive strength (6.76 MPa) and low water absorption (20.12%), was found to be 73% coal gasification coarse slag, 15% cement, and 12% quartz sand. The characterization using Fourier transform infrared spectroscopy showed that the formation of gelatin in ceramsite enhances the performance of the ceramsite base and increases the immobilization of heavy metal. The study proved that the preparation of non-sintered ceramsite using coal gasification coarse slag reduces its environmental risk and achieves efficient utilization of the slag. Therefore, it can be concluded that it is a feasible and environmental friendly method for the disposal of coal slag.

O b j e c t i v e s: To evaluate the properties of natural sweetener solutions in whole organ preservation and assess their influence on the dimension, weight and shape of cardiac tissue samples in stated time intervals, up to a one-year period of observation.

B a c k g r o u n d: Tissue fixation is essential for biological sample examination. Many negative toxic effects of formaldehyde-based fixatives have forced us to seek alternatives for formaldehyde based solutions. It has been demonstrated that natural sweeteners can preserve small tissue samples well and that these solutions can be used in histopathological processes. However, their ability to preserve whole human organs are unknown.

M e t h o d s: A total of 30 swine hearts were investigated. Th ree study groups (n = 10 in each case) were formed and classifi ed on the type of fixative: (1) 10% formaldehyde phosphate-buffered solution (FPBS), (2) 10% alcohol-based honey solution (ABHS), (3) 10% water-based honey solution (WBHS). Samples were measured before fi xation and in the following time points: 24 hours, 72 hours, 168 hours, 3 months, 6 months and 12 months.

R e s u l t s: The WBHS failed to preserve heart samples and decomposition of tissues was observed one week after fixation. In half of the studied parameters, the ABHS had similar modifying tendencies as compared to FPBS. Th e overall condition of preserved tissue, weight, left ventricular wall thickness, right ventricular wall thickness and the diameter of the papillary muscle differed considerably.

C o n c l u s i o n s: The ABHS may be used as an alternative fi xative for macroscopic studies of cardiac tissue, whereas the WBHS is not suited for tissue preservation.