Marketing Research on Passenger Satisfaction With Public Transport Service in the City of Belgrade

The aim of this paper is to determine, based on conducted marketing research, the level of passenger satisfaction with public transport services for the purpose of making better marketing decisions in the example of the City of Belgrade. The main task is to test the hypothesis on the existence of significant influence of factors, such as quality service, attitude and behaviour of employees (e.g. driver), adequate informing, quality of vehicles, line routes and timetable, on passenger satisfaction. Correlation coefficient and regression analysis were used for interpreting the obtained results and examining the formulated hypothesis. Empirical research has shown that there is a significant correlation between the aforementioned factors and passenger satisfaction with public transport services. The obtained results provided recommendations and guidelines for improving and increasing the quality of public transport services. The research results also provide the basis for future research that could examine the relationship between passenger satisfaction with services and sub-groups within the analyzed factors.</p

Prostorna distribucija prirodnih radionuklida merena u Srbiji upotrebom biomonitora

Активност природних радионуклида је мерена у 217 узорака маховина Hypnum cupressiforme које су сакупљене крајем лета 2015. године на комплетној територији Републике Србије са циљем да се установи просторна дистрибуција радионуклида. Мерења су вршена NaI детектором облика јаме. Посебна пажња је посвећена 7Be који се већ деценијама користи као природни обележивач у изучавању транспортних процеса у атмосфери. Добијено је да је дистрибуција атмосферске депозиције 7Be неуниформна и да се најмања и највећа измерена вредност разликују девет пута. Просторна дистрибуција 7Be не показује корелацију са рељефом терена за разлику од 137Cs кога има више у планинским и шумовитим пределима. Присутност радионуклида из урановог и торијумовог низа у доброј мери зависи од структуре и састава тла на локацијама са којих су узимани узорци.The activities of natural radionuclide were measured in 217 moss samples that were collected at the entire territory of Serbia. Measurements were taken by well-type NaI detector in order to establish the spatial distribution of radionuclides. Special attention was paid to 7Be. It is obtained that the distribution of atmospheric deposition of 7Be is non-uniform; the minimum and maximum measured value differs nine times. No coincidence of the spatial distribution of 7Be with the relief was observed. It was noticed that higher values of 137Cs were detected in mountain and wooded areas. The presence of radionuclides from the Uranium and Thorium chains in the large extent depends on the structure of the soil at the sampling site

Prevalence and genetic variability of Plesiomonas shigelloides in temperate climate surface waters of the Pannonian Plain

Plesiomonas shigelloides, a Gram-negative bacterium and the causative agent of intestinal diseases and extraintestinal infections in humans and animals, is most frequently found in aquatic environments in tropical or subtropical areas. The present study was designed to establish the prevalence and genetic variability of P. shigelloides in surface waters (lakes, rivers, ponds, inlets and canals) located in a temperate climate zone, namely the Pannonian Plain of the northern part of Serbia and southern part of Hungary. The strains were isolated directly by plating samples on inositol-brilliant green-bile agar with neutral red or phenol red as indicators. Our results indicate that phenol red effectively facilitates differentiation of P. shigelloides from other bacteria. A number of samples were enriched using alkaline peptone water broth, peptone inositolbile broth and tetrathionate broth. The recovery of the isolates was more successful with the first medium. Out of a total of 51 water samples collected from 28 different locations, 22 samples (43.1%) were found positive for P. shigelloides. Among the 37 isolated strains, 34 were from lakes (Šatrinci, Ludaš, Panonija, Krivaja, Pecs, Kapetanski rit, Pavlovci, Kovacsszenaja, Dobrodol, Vranjaš, Borkovac, Hermann Otto, Sot, Šelevrenac, Zobnatica, Palić, Orfui, Jarkovci, Čonoplja) and 3 were from rivers (Danube, Sava). The strains were identified by phenotypic characteristic or by the VITEK2 system and confirmed by PCR using 23S rRNA species-specific oligos. The strains showed a high genetic variability, displaying a variety of RAPD profiles. Our results reveal for the first time a high prevalence of genetically diverse P. shigelloides populations in surface waters located in the temperate climate of central and southeastern Europe. [Project of the Serbian Ministry of Education, Science and Technological Development, Grant no. OI 172058

Monitoring of fungal spores in the indoor air of preschool institution facilities in Novi Sad

Fungal spores can cause a range of health problems in humans such as respiratory diseases and mycotoxicoses. Since children are the most vulnerable, the presence of fungal spores in the facilities of preschool and school institutions should be investigated readily. In order to estimate air contamination by fungal spores, air sampling was conducted in eight facilities of the preschool institution in Novi Sad during February and March, 2007. Sedimentation plate method was used for the detection of viable fungal spores, mostly being members of subdv. Deuteromycota (Fungi imperfecti). In 32 samples a total of 148 colonies were developed, among which five genera were identified: Penicillium, Cladosporium, Aspergillus, Alternaria and Acremonium while non-sporulating fungal colonies were labeled as sterile mycelia. Most frequently recorded genera were Penicillium with 46 colonies and Cladosporium with 44 colonies. The genera Aspergillus and Alternaria were represented with 3 colonies each and Acremonium with only 1 colony. The greatest number of colonies emerged in the samples from the day care facilities “Vendi” (58 colonies) and “Panda” (49 colonies). Most diverse samples were obtained from the day care center “Zvončica”, with presence of all identified genera. These results showed notable presence of fungal spores in the indoor air of Preschool institution facilities and indicated the need for further, more complete seasonal research. Obtained information is considered useful for the evaluation of potential mycofactors that endanger health of children. [Projekat Ministarstva nauke Republike Srbije, br. III43002

The use of moss as an indicator of rare earth element deposition over large area

Nowadays, rare earth elements (REEs) represent a group of emerging pollutants due to their growing application in industry and agriculture, hence, the environmental and human exposures undergone a steady spread. Since REEs can be a part of airborne particulate matter (PM), moss biomonitoring could be a tool for the assessment of their atmospheric deposition. In 2015, moss samples of Hypnum cupressiforme Hedw. were collected at 212 sites across Serbia, and 16 REEs, including Lanthanides (La to Lu), Sc and Y, were determined in the samples by inductively coupled plasma mass spectrometry (ICP-MS). The measured element concentrations were normalised according to different natural reference systems searching for the REE enrichment in the studied environmental samples, and their possible anomalies. The ratios of REEs, specified in the literature, were used to reveal the element origin. In this study, the order of REE abundance in the moss samples was similar to that found in other environmental compartments, which together with the obtained strong correlations among the elements imply their similar origin, probably geogenic. Nevertheless, the ratio La/Sm (5.1) entered the range that characterised coal combustion. In addition, the median enrichment factors (EFs) of the elements calculated according to typical crustal elements, Al and Sc, were not exceeded the value 5 which suggests slightly anthropogenic stake. However, high values of EF REEs (≈40) were obtained in the moss samples from certain regions of Serbia (south and northeast) characterised by the extensive exploitation of coal and mineral deposits, and their further manufacturing or combustion. The results of this study found that the moss is a sensitive tool reflecting the presence of REEs in atmospheric deposition even those in traces (Ho, Er, Tm, Yb, Lu)

Parazitska fauna svinja u organskom držanju

Parasites infection were permanent health problem at swine production at exensive and farm breeding. Organic breeding induced permanent contact of swine and intermeditae host of numerous parasites and those infection were more frequent at these breeding condition. In most cases there were presented biohelminths from genus Metastrongylus, nematode which cause gastritis verminosa (Ascarops strongyllinae, Physocephalus sexalatus and Hyostrongylus rubidus), Oesophagostomum spp. And Macracanthorhynchus hirudinaceus. There were presented at lover rate of infection Acaris suum,. and other helminths.Parazitske infekcije predstavljaju stalne pratioce svinjarske proizvodnje, nezavisno od načina držanja. Organska proizvodnja i držanje uslovljavaju da svinje imaju direktan dodir sa mnoštvom prelaznih domaćina parazita a samim tim da su kod njih parazitske infekcije češće. U najvećoj meri ovde se javljaju biohelminti od kojih su najvažniji predstavnici roda Metastrongylus, uzročnici verminoznog gastrita (Ascarops strongyllinae, Physocephalus sexalatus and Hyostrongylus rubidus), Oesophagostomum spp. i Macracanthorhynchus hirudinaceus. Ovde se takođe javljaju i Acaris suum, i drugi helminti u manjem obimu