Introduction. Hepatitis A virus is the most common cause of acute viral hepatitis, and in people over 25 years of age the disease may have different degrees of severity. Even though hepatitis A virus infection was long believed to be transmitted strictly by fecal-oral route, now this virus is classified among sexually transmitted diseases. Homosexual population, especially those positive for human immunodeficiency virus, is at the greatest risk of hepatitis A virus infection. Case 1. A twenty-six-year-old male homosexual was admitted with clinical and laboratory findings of acute hepatitis. The patient tested positive for enzyme-linked immunosorbent assay immunoglobulin M antibodies to hepatitis A virus and human immunodeficiency virus antibodies, and later on human immunodeficiency virus infection was confirmed by polymerase chain reaction test. After the discharge, the antiretroviral therapy was initiated. Case 2. A twenty-seven-year-old male homosexual was transferred to our clinic from the Regional Hospital, where he was hospitalized due to acute hepatitis A virus infection, after a positive serological test for anti-human immunodeficiency virus antibodies. Human immunodeficiency virus infection was confirmed by polymerase chain reaction test, and upon discharge, antiretroviral therapy was initiated. Conclusion. In order to take the most effective preventive measures, it is very important to identify individuals and groups at high risk of coinfection with human immunodeficiency virus and hepatitis A virus. Timely vaccination against hepatitis A virus among people living with human immunodeficiency virus is recommended and therefore it is necessary to design effective strategies for education of groups at risk.

Serbian Sokol Societies were based on the idea of a new form of physical exercise originated in the Czech lands in the second half of the 19th century. After first initiatives, this idea soon spread to all Slavic as also countries where Slavic nations lived. That is how since 1907 this way of physical exercise appeared among Serbs who lived in America (USA). The Sokol idea in state of Pennsylvania started by the local Serbs in Steelton in the middle of 1912, when, following the initiative of the orthodox priest Teofil H. Stefanovic, they founded the Serbian Sokol Society. The subject of this research is Serbian Sokolism in America (USA) with the aim to explore when this society was founded, who took part in those and other activities until June 1914. During research authors used historical method.

A very important segment, which occurs as a result of welding, is the occurrence of residual stresses in welded structures. The effects of residual stresses can be beneficial or harmful to the structure, depending on their size, sign, and stress distribution in relation to the stresses caused by the external load itself. Therefore, the examination of residual stresses is very important because they significantly affect the formation and growth of cracks, the appearance of brittle fractures, material fatigue, etc. The paper presents the test procedure for measuring residual stresses by the method of "hole drilling" and the possibility of practical application of knowledge about residual stresses in order to improve the quality of machine parts and the structure itself.

The main objective of the research is to analyze the possibility of introducing the agro-ecological concept through appropriate agro-ecological measures in agricultural policy of Bosnia and Hercegovina. For this purpose, theoretical and empirical studies have been conducted. Theoretical research included analysis of the strategic and regulatory framework in the European Union and Bosnia and Hercegovina and analysis of the development of the concept of agro ecology. Empirical research has included surveying holders of agricultural holdings of subjects according to the Eco Stack project methodology. The survey results confirm that farmers are generally not familiar with the concept of agro ecology, but do apply some of the agro-environmental measures. On the basis of the research results, steps have been proposed to introduce a new model of support for the application of the agro-environmental concept and measures in the framework of agricultural policy of Bosnia and Hercegovina.

The main goal of paper is to rank the criteria that are important for the selection of the most favourable supplier of the agricultural company by applying a multicriteria decision-making model. Subject of the paper is the procurement of mineral fertilizer for sowing certain field crops. As a method of work, the author uses DEMATEL (The Decision making Trial and Evaluation Laboratory) method of multicriteria decision making. In order to bring the research as close as possible to human thinking, the fuzzy logic of multicriteria decision-making was applied in the paper. Method is an expert assessment and ranking by experts in the field. In addition to the group of economic and technical criteria, the paper also uses criteria related to sustainable development such as environmental management system, green product, pollution and waste control, recycling and eco-product design. Results of the research show that the criteria that are from the economic group are still assessed as the most important for the decision maker. Importance of the research would be in pointing out the increase in the importance of criteria, especially those from the sustainability group according to their importance in the coming period, and the possibility of applying modern decision-making methods.

This is the issue of third volume of EFMI Inside - the official magazine of the European Federation for Medical Informatics (EFMI), founded in Lyon, France in August 2019, during “MEDINFO 2019” Conference and EFMI Council meeting. In this issue readers can find important information about events organized during 2022 by EFMI Working Groups and national Medical informatics associations, including the most influential Conference - 32nd MIE 2022 Conference held in Nice, France in May 2022, and EFMI STC held in Cardiff in September 22. This EFMI Inside issue contains important facts about other EFMI activities which needed to be recorded for people who couln’t be active participants at the evenings organized by EFMI and members of EFMI associatins.. Very important part of the issue is official report of the EFMI Council Secretary, Professor Alfred Winter about EFMI Council meetings during years 2020, 2021 and 2022 with included all important facts about EFMI activities during past, especialy during the mandate of Alfred Winter as Secretary from 2014 until 2022. It was the first time that all important facts about EFMI were completed at the one place and we decided to published it as some kind of historical bachground of EFMI for people who will continue managing EFMI Council and EFMI Board activities in the future.In this issue we also involved information about new elected Honorry Fellows during last three years and also obituaries about members who passed away, but their names need to be mentioned regarding its important contributions in the development of Medical informatics globaly and in its national organizatios, Some of chairs of Working Groups contributed with their reports in the past year who were actively involved in the development of Medical informatics in their countries, but also worldwide.

After the migration of Serbs in 1690 and 1735, the exploitation of mines in the area of present-day Serbia ceased, and after a standstill of nearly 200 years, the mining and metallurgical activities in Serbia were activated in the second quarter of the 20th century. The first concessions were bought by England in 1926, then the mines in Stari Trg (1927), Kišnica (1927), Ajvalija (1930), Novo Brdo (1933) were activated, and the Flotation (1930) and Smelter with Lead Refinery began to operate (1939) in Zvečan. In Kosovska Mitrovica, the chemical industry began operating in 1961, the Zinc Metallurgy and Lead Battery Factory in 1967, and all production facilities were expanded and modernized several times. The most intensive production and investment period of the "Trepča" Combine was in the period 1965-1985, when "Trepča" was a well-known producer of lead, zinc, silver, gold, cadmium, bismuth and products made of these metals. After 1990, the production declined for several reasons and, in 1999, the international army stopped production in "Trepča". In the past twenty years, the production has not been completely renewed nor the status of the "Trepča" Combine has not been regulated.

Allelopathy determines the dynamics of germination, development and growth of plant species in the environment. Therefore, in this study, the allelopathic effect of an aqueous extract isolated from walnut (Juglans regia L.) leaves (concentrated extract, 1:2, 1:4 and 1:8) on the germination percentage, mean germination value and germination rate of wheat (Triticum aestivum L.) and peas was monitored (Pisum sativum L.). Both tested species were sensitive to juglone, but the percentage of germination was significantly lower in wheat (by 80%) compared to peas, so it can be said that this species is more sensitive. The length of roots and shoots of both tested species decreased in proportion to the increase in the concentration of the extract. Monitoring of this biological phenomenon could help to understand the changes in the environment caused by allelochemicals.

In this study, changes in Class III peroxidase (POX) and polyphenol oxidase (PPO) activity in Phragmites australis (Cav.) Trin. Ex Steud. Utricularia vulgaris L. and Salvinia natans (L.) from the Bardača wetland during one vegetation season (June-October) were monitored. The highest activities of soluble and ionic cell wall bound peroxidases (solPOX and ionPOX, respectively) were measured for Phragmites communis (leaf > root > rhizome), followed by Utricularia vulgaris (whole plant), then Salvinia natans (whole plant). The results showed that during the vegetation period (August-September) the activity of solPOX, ionPOX and PPO in Phragmites communis increased, but the activity decreased drastically in October. For Salvinia natans and Utricularia vulgaris, a different seasonal distribution was obtained in the PPO activity, i.e. with a maximum activity during July and a minimum one during September. Different seasonal trends in enzyme activities are probably the result of abiotic stress caused by changing physic-chemical environmental conditions and different adaptive capacities of the studied species to habitat conditions. Correlations between physicochemical environmental parameters and enzyme activities indicate the possibility of using POX and PPO activities as an important bioindicatos of environmental status.

: Chromium in wastewater is discharged from tannery, electroplating, metal finishing, dying industry and many other industries. Presence of hexavalent chromium (Cr(VI)) in the environment considerable concern because it is non-biodegradable, highly toxic and carcinogen. There are several treatments for the removal of chromium from wastewater, but the most common method involves reduction to its less toxic trivalent state. In this paper electrocoagulation was used as treatment for removing of hexavalent chromium from synthetic prepared wastewater initial concentration 50 mg/L, in presence of sodium chloride as supporting electrolyte (1 g/L). The treatment was perform in a batch electrochemical reactor 250 mL capacity and with possibility of constant stirring. It was examined the impact of electrode materials and current density (5, 10, 20 mA/cm 2 ) on Cr(VI) removal efficiency. The examination showed that iron has higher removal efficiency compared to aluminium. Also, it was observed high efficiency at very begin of treatment and at low current density. For 20 minutes of treatment it was achieved almost complete Cr(VI) removal at current density of 5 mA/cm 2 by using iron electrodes ( E= 99.8 %).

Cement dust is created as a by-product during the production of cement, and in its composition it contains high concentrations of calcium oxide (CaO), potassium oxide (K2O) and other important micro and macro elements. Due to its composition, it is suitable for correcting the pH of the soil, as well as for the uptake of essential elements by plants. The ability to accumulate essential and non-essential heavy metals also depends on the cultivated plant species, and vegetables show the greatest affinity for these elements. The application of cement dust as a soil additive used to improve the physico-chemical soil properties is examined in the paper. After the addition, the soil was mechanically cultivated and planting of the vegetable crop tomato was carried out. The content of essential elements and heavy metals was determined in the soil, cement dust, and tomato fruits grown on soil with and without the addition of cement dust. Due to the high pH value, high conductivity as well as the high content of CaO, it is very important to examine in real conditions how the addition of cement dust to the soil affects the formation of micro and macro elements as well as the content of heavy metals when growing tomatoes. The results showed that the cement kiln dust is an effective addition to the soil because it is a source of calcium, potassium and other essential elements without affecting the loss of quality or contamination with heavy metals during production.