Stanko Cvjeticanin

Distribution of opiate alkaloids in brain tissue of experimental animals

ABSTRACT The present study examined regional distribution of opiate alkaloids from seized heroin in brain regions of experimental animals in order to select parts with the highest content of opiates. Their analysis should contribute to resolve causes of death due to heroin intake. The tests were performed at different time periods (5, 15, 45 and 120 min) after male and female Wistar rats were treated with seized heroin. Opiate alkaloids (codeine, morphine, acetylcodeine, 6-acetylmorphine and 3,6-diacetylmorphine) were quantitatively determined in brain regions known for their high concentration of μ-opiate receptors: cortex, brainstem, amygdala and basal ganglia, by using gas chromatography-mass spectrometry (GC-MS). The highest content of opiate alkaloids in the brain tissue of female animals was found 15 min and in male animals 45 min after treatment. The highest content of opiates was determined in the basal ganglia of the animals of both genders, indicating that this part of brain tissue presents a reliable sample for identifying and assessing contents of opiates after heroin intake.

TEACHER'S OPINION ABOUT THE IMPLEMENTATION OF INCLUSIVE EDUCATION IN TEACHING INTEGRATED NATURAL SCIENCES

This paper analyzes the problems which primary school teachers face during these science lessons and their willingness for professional development to enable themselves to implement the inclusion model in teaching science in primary schools. The research included 332 primary school teachers. The data was collected using a survey and analyzed by comparative and descriptive methods. It showed that the initial professional development program enabled teachers to gain some general knowledge about the inclusion model, but it did not qualified them for applying this model in integrated science teaching in primary schools. Teachers believe that science should be taught by qualified science teachers who have some experience with the inclusion model. Teachers also want to improve their knowledge through further professional trainings. They are faced with a lack of cooperation with institutions which deal with inclusive education, the lack of adequate literature on the inclusion model and its implementation in science teaching, as well as a variety of financial and technical barriers. They want to gain knowledge about the inclusion model, so that they can apply it during their science lessons.

Computer Application in the Initial Education of Children in Natural Sciences / PRIMJENA RAČUNALA U POČETNOM OBRAZOVANJU DJECE U PRIRODNIM ZNANOSTIMA

At their young age pupils learn the contents of natural sciences by combining different methods and forms of work. This study examined the effect of computer-aided learning on the quality of pupils’ knowledge about the natural habitats. A total of 168 third grade primary school pupils (9-year-old) from the Republic of Serbia took part in this research (84 pupils comprising the control group and 84 pupils comprising the experimental group). Causal, descriptive and comparative methods were used in this study. Initial test, final test and retest were used as tools for the measurement of the pupils’ knowledge about the habitats. On the basis of the results obtained, it was concluded that the experimental group of pupils, who had used computers in the learning process, obtained better knowledge about habitats, when compared to the control group of pupils who had been taught in the traditional way. The experimental group pupils achieved better results at the levels of application, analysis, synthesis and the evaluation of knowledge.

Eco-chemical knowledge, behavior and engagement of workers employed in the mineral fertilizer industry in Novi Sad

The level of environmental pollution is influenced by the knowledge, behavior and ecological engagement of both the individual and society. The mineral fertilizer industry represents a potential source of pollution. The issue examined in this study is the level of eco-chemical knowledge, behavior and ecological engagement of the workers employed in the mineral fertilizer industry in Novi Sad. We have concluded that the workers hover low level of knowledge, behavior and engagement. The results obtained could be used for the selection of methods to enhance the eco-chemical knowledge of the employees.