This paper offers significant evidence for the presence of a beneficial impact of foreign direct investment on technical efficiency based on a balanced panel data on a sample of 92 manufacturing ...groups over the period 2010-2019. Throughout this period Serbia lost 28% of the potential output of the manufacturing sector due to technical inefficiency. The finding is directly supported by the results at the level of the observed groups. Thus, the greatest increase in technical efficiency is in branches with a high share of foreign ownership, such as: production of motor vehicles, production of chemicals, and production of wire and cable equipment. The methodology is based on stochastic frontier analysis - within that, 'true' random effects model. The paper contributes to a better understanding of the possible consequences of foreign-invested enterprises on the domestic economy and, in particular, the performance of local businesses. As a result, it is helpful to policymakers in developing counties, where FDI is thought to have technological spillovers on native businesses.
This paper analyses technological intensity of Serbian manufacturing sector. The key purpose is to identify development of technological advancement groups (high, medium-high, medium-low and low) ...during the period of 2010-2019. The analysis shows that in 2019 the share of high-tech production areas in the total MVA increased to 5%, which is the best result since 2015. Changes in production correspond to the movement in foreign trade. The coverage of imports by exports of the manufacturing industry, relatively observed in the medium term, is increasing the fastest in the segment of tangible production, which is included in the category of medium-technological complexity. Serbia is not exclusively competitive in the labour intensive stages of production. It is also competitive in a good part of medium-technological complexity production. Finaly, vast FDI inflows and the activities of foreign investors, in good part, drive successful technological restructuring in recent years.
Migracije su danas jedna od najaktuelnijih tema u svetu. Najčešći razlozi nastanka su ratovi, zatim, to mogu biti klimatske promene, a postoje i migracije nastale iz ekonomskih razloga, i njihov cilj ...je potraga za boljom materijalnom egzistencijom, ostvarivanje višeg životnog standarda, bolji uslovi zapošljavanja, obrazovanja, a samim tim i bolji uslovi života. Predmet ove analize su ekonomske migracije i savremena migraciona kretanja, tj. useljavanje i iseljavanje stranaca u zemlje Zapadnog Balkana (ZB). Makroekonomski pokazatelji ukazuju na stabilizaciju na tržištu rada u drugoj deceniji XXI veka, mada ekonomije stagniraju. Postavlja se pitanje da li je to posledica veće stope privrednog rasta ili su indukovani depopulacijom i redukcijom radno aktivnog stanovništva? Cilj rada je da se ukaže na neophodnost upravljanja migracionim tokovima u ovim zemljama i potrebe za usmeravanjem migranata na tržištu rada. Rad se sastoji iz dva dela. U prvom delu se daje pregled dosadašnjih istraživanja o migracijama, pojmu i vrstama migracija. Drugi deo rada se sastoji iz empirijske analize migracija u zemljama Zapadnog Balkana i Srbije i njihovom uticaju na tržište rada i privredni razvoj.
The subject of this paper is the productivity of the manufacturing industry of Serbia. The analysis was conducted on data for 85 manufacturing groups of Serbian industry during the period 2012-2022. ...Changes in total factor productivity, as well as the decomposition of these changes into technological changes and innovations on the one hand, and efficiency changes on the other, were estimated using Malmquist indices calculated by DEA program. The introduction offers a brief overview of the macroeconomic context in which industrial production takes place. The second chapter is devoted to the methodology and the presentation of the data used. In the third part of the paper, the results of the research are presented. The total factor productivity of the manufacturing industry grew at a low average rate of about 0.5% annually. The manufacturing industry lacks continuity of growth, with no more than two years of consecutive productivity growth recorded. The best results were achieved in the manufacture of coke and refined petroleum products, electrical equipment and other transport equipment. Productivity growth in these divisions is rather the result of efficiency improvements than technological changes, i.e. innovations. The biggest decline was achieved in the manufacture of basic iron and steel.
Percutaneous transhepatic biliary drainage (PTBD) is a decompression procedure for malignant proximal biliary obstruction. In this research, over a six-year period, 89 patients underwent PTBD ...procedure for jaundice caused by malignant disease to restart chemotherapy or for palliative intent. Clinical outcomes after PTBD procedure in the two groups of patients, according to the adequate bilirubin decline (ABD) needed for subsequent chemotherapy, are presented in this paper. Survival and logistic regression were plotted and compared using Kaplan−Meier survival multivariate analysis with a long-range test. Results were processed by MEDCALC software. In the series, 58.4% (52/89) of patients were in good performance status (ECOG 0/1), and PTBD was performed with the intention to (re)start chemotherapy. The normalization of the bilirubin level was seen in 23.0% (12/52), but only 15.4% (8/52) received chemotherapy. The median survival time after PTBD was 9 weeks. In patients with ABD that received chemotherapy, the median survival time was 64 weeks, with 30-day mortality of 27.7%, and 6.4% of death within 7 days. The best outcome was in patients with good performance status (ECOG 0−1), low bilirubin (<120 µmol/L) and LDH (<300 µmol/L) levels and elevated leukocytes at the time of the procedures. PTBD is considered in ABD patients who are candidates for chemotherapy.
The antimicrobial activity of methanol extracts of three thalloid liverworts, Marchantia polymorpha, Conocephalum conicum and Pellia endiviifolia and bis-bibenzyl marchantin A, the most dominant ...compound in the methanol extract of M. polymorpha, have been investigated in this research. 1H-NMR spectroscopy revealed that the M. polymorpha and P. endiviifolia extracts of liverwort contain terpenes, oils, sugars and bis-bibenzyls, while these specific macrocyclic compounds were absent in the C. conicum extract. The antimicrobial potential was tested on eight bacterial strains. Antimicrobial effects of extracts and marchantin A were observed against Gram-positive bacteria, while they showed no effect against Gram-negative bacteria in both methods used ? well diffusion and broth microdilution.
The aim of this paper is to provide an answer on question if energy transition would have an effect on electricity prices in Serbia. As a part of the Energy Community, Serbia is obliged to harmonize ...its energy regulation with the Europan Union. Even though electricity price in Serbia is at the lowest level in Europe, it has a high share in the household consumer basket. However, electricity price does not include the cost of CO2 emissions. The recent adoption of National Emission Reduction Plan implies Serbia's obligation to reduce emissions from large combustion plants by 2028. This commitment will entail significant investments and will influence the further development of the electricity sector. Accession of the Republic of Serbia to the EU and consequent implementation of EU ETS in the period 2023-2028, will have a significant impact on the EPS electricity cost production. At the moment, rough estimates show that this amount goes up to 2.5 eurocents per kWh produced by thermal power plants.
In this study, we report genetic characterization of Orobanche cumana, the causal agent of sunflower wilting in Serbia. The genetic diversity of this parasitic plant in Serbia was not studied before. ...Random amplified polymorphic DNA (RAPD) markers and partial rbcL gene sequences analysis were used to characterize the O. cumana populations at the molecular level. While phylogenetic analyses of RAPD-PCR amplicons were performed using unweighted pair-group Method analyses, rbcL gene sequences were analyzed using neigbor joining method and minimum spanning tree. Molecular analyses of RAPD-PCR analysis revealed high genetic diversity of O. cumana populations which indicated high adaptive potential of this parasitic weed in Serbia. Further analyses of rbcL gene using minimum spanning tree revealed clear differences among diverse sections of Orobanche genus. Although this molecular marker lacked the resolution to display intrapopulation diversity it could be a useful tool for understanding the evolution of this parasitic plant. Our results suggested that O. cumana has great genetic potential which can lead to differentiation of more virulent races which is important for determining crop breeding strategies for their control.
Environmental studies which aim to assess the ecological impact of chemical and other types of pollution should employ a complex weight-of-evidence approach with multiple lines of evidence (LoEs). ...This study focused on in situ genotoxicological methods such as the comet and micronucleus assays and randomly amplified polymorphic DNA analysis as one of the multiple LoEs (LoE3) on the fish species Alburnus alburnus (bleak) as a bioindicator. The study was carried out within the Joint Danube Survey 4 (JDS4) at nine sites in the Danube River Basin in the Republic of Serbia. Out of nine sampling sites, two were situated at the Tisa, Sava, and Velika Morava rivers, and three sites were at the Danube River. The three additionally employed LoEs were: SumTUwater calculated based on the monitoring data in the database of the Serbian Environmental Protection Agency (SEPA) (LoE1); in vitro analyses of JDS4 water extracts employing genotoxicological methods (LoE2); assessment of the ecological status/potential by SEPA and indication of the ecological status for the sites performed within the JDS4 (LoE4). The analyzed biomarker responses in the bleak were integrated into the unique integrated biomarker response index which was used to rank the sites. The highest pollution pressure was recorded at JDS4 39 and JDS4 36, while the lowest was at JDS4 35. The impact of pollution was confirmed at three sites, JDS4 33, 40, and 41, by all four LoEs. At other sampling sites, a difference was observed regarding the pollution depending on the employed LoEs. This indicates the importance of implementing a comprehensive weight-of-evidence approach to ensure the impact of pollution is not overlooked when using only one LoE as is often the case in environmental studies.
Background/Aim. Taking into consideration the justified popularity of total arterial revascularization, the saphenous vein graft (SVG) is still one of the most utilized conduits in coronary artery ...bypass grafting (CABG). One of the determining factors of this conduit?s durability is its endothelial integrity at the time of surgery. The aim of the study was to investigate the effect of different storage solutions on SVG endothelial integrity in patients with diabetes mellitus (DM) type 2 (T2DM) and non-T2DM patients undergoing CABG. The solutions under evaluation were heparinized saline solution (0.9% NaCl), heparinized autologous whole blood, Bretschneider (histidine-tryptophan-ketoglutarate ? HTK) solution, and fresh frozen plasma (FFP) solution. Methods. Forty patients were included in this study and were divided into two groups: group A with 23 T2DM patients and group B with 17 non-T2DM patients. The effects of these solutions were examined by immunohistochemical staining with anti-CD34 antibodies and morphometric comparison in histologic samples of T2DM patients undergoing CABG between July 2021 and September 2022 with samples provided by non-T2DM patients. Results. In this study, the FFP solution showed the most prominent positive effect on the preservation of SVG endothelial integrity, with an average cell integrity preservation of 92.2%. HTK solution was found to be the least effective, with an endothelial cell preservation integrity of 26.77%. There was no marked statistically significant difference in results from groups A and B. There was a noticeable contrast in preserving SVG endothelial integrity between the two patient groups, T2DM and non-T2DM patients, although it was not statistically significant. Conclusion. The storage solution with the most beneficial effect on SVG endothelial integrity preservation was the FFP solution when harvested via the conventional open method in CABG.
Celotno besedilo
Dostopno za:
DOBA, IZUM, KILJ, NUK, ODKLJ, PILJ, PNG, SAZU, UILJ, UKNU, UL, UM, UPUK
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