The aim of the research is to examine the degree of competitiveness of the agri-food sector of the Republic of Serbia on the market of the European Union (EU) countries, as the most significant export market. Two partial indices were used in the analysis: the net trade index (NTI) and the Grubel-Lloyd index (GLI). In addition to these indicators, unit export and import price analysis was also used to obtain data on the type of competitiveness achieved by the divisions of the agri-food sector. The results show that the cereals division makes the highest contribution to reducing the existing trade deficit, while the high values of the GLI reflect a high degree of integration with this market. The agri-food sector shows dominant price competitiveness in terms of the share of such divisions in total exports to the EU. The results will include recommendations for improving the structure of exports by focusing on specific divisions.

Peritonitis carcinomatosa, indicating the presence of malignant cells in the peritoneal cavity, is a well- known complication of malignant disease. The collection of intraperitoneal fluid in a patient with ovarian cancer is most likely due to intraperitoneal spread of disease. The recognition of small quantities of intraperitoneal fluid may have staging and prognostic significance, while symptomatic large collections may reflect end-stage disease, which permits only palliative therapeutic options. In this paper we dis- cussed the pathogenesis of malignant ascites in ovarian cancer patients and suggested potential new treatment approaches

Summary The key objective of agricultural protectionism is reflected in the protection

The waste increase and the environmental damage risk are important causes for the emergence of a new economic model that replaces the linear economy. The aim of the research is to point out the importance of the circular economy in a globalized society in which the sustainable development is a highly positioned goal. The importance of the issue stems from the fact that social welfare, apart from the development of production, must also be based on the preservation of health and living environment. The paper demonstrates many economic and social benefits from the implementation of the circular economy principles, as well as, the basic elements of this concept. The main objective is to reduce waste from the existing production cycle through the recycling process.

The aim of the research is to classify the European Union (EU) countries based on the progress in the economic performance of agriculture. The originality of the paper stems from the fact that a new set of indicators (in relative form) was used to identify the clusters. The following indicators are used to assess the economic performance of the EU agricultural sector (by cluster analysis) for two periods (2015-2017 and 2018-2020): total labor force input, real income of factors in agriculture per annual work unit, total agricultural output, gross value added of the agricultural industry, and animal output. The study confirmed that EU countries, according to changes in agricultural performance, differ significantly. They were grouped into four relatively homogeneous clusters according to their similarity, with a clear geographical dispersion for both analyzed periods. Identifying development disparities between EU countries can be useful in future redesigns of the Common Agricultural Policy measures in terms of increased support to certain members.