ANTIOXIDANT AND ANTIMICROBIAL POTENTIAL OF OPOPANAX HISPIDUS(APIACEAE) EXTRACTS

The present study was aimed to investigate antioxidant and antimicrobial potential of methanol and ethyl-acetate extracts from dried aerial parts, inflorescences and fruits of Opopanax hispidus (Friv.) Griseb., fam. Apiaceae. The antioxidant potential was evaluated with the help of two in vitro antioxidant models – DPPH and ABTS assays and estimation of total phenolic and flavonoids using spectrophotometric methods. BHA and Vitamin C were used as standard and positive control for above models. Microdilution assay was used to evaluate antimicrobial potential for the most common human gastrointestinal pathogenic microbial strains. The results of DPPH and ABTS assay showed that the highest antioxidant activity have methanol (IC50=1.157 mg/ml) and ethyl-acetate (IC50=3.167 mg/ml) extracts from inflorescences. The highest value of total phenolic (89.95±0.005 mg GA/g) and total flavonoid (24.06 ± 0.004 mg Qu/g) was measured in inflorescences extracts also. Results indicate that both extracts (methanol and ethyl-acetate) of inflorescences have high amount of phenol and flavonoids, which could be responsible for its good antioxidant activity.The most susceptible were Listeria monocytogenes and Escherichia coli on ethyl-acetate extracts from fruits and inflorescence, respectively. This is the first record of antioxidant and antimicrobial activity of Opopanax hispidus from Serbia. It is also worth noting that these results validate the therapeutic use of the plant in traditional medicine

Fifth European Dirofilaria and Angiostrongylus Days (FiEDAD) 2016

Peer reviewe

VALUE AT RISK PERFORMANCE IN DEVELOPED AND EMERGING STOCK MARKETS

ABSTRAC

Total Quality Management Implementation and Guest Satisfaction in Hospitality

Total quality management (TQM) has become a modern system of constant improvement of the quality of all company activities. The purpose of this study is to measure the expectations and satisfaction of the guests concerning the attribute quality of the hotel product. Furthermore obtained results were compared in such a way as to analyse particularly the reviews of hotels which have implemented TQM and have the ISO 9001 certificates with reviews from hotels which have not implemented TQM and do not have the ISO 9001 certificates. The conducted analysis included 55 hotels in Serbia belonging to the 4- and 5-star categories, i.e. 1308 guests who have stayed in them. The results show that between the observed groups of guests there are fewer differences in expectations than in perception, and that generally speaking guests who have stayed in the hotels that have implemented TQM are more satisfied. The biggest difference concerning the guest satisfaction with the quality of service in the observed hotels is noticeable in relation to the employees and the value-for-money

Economic and legal conceptual framework of viral marketing

Electronic and online communications are modern, and perhaps the most common form of communication between individuals and legal entities, and thus have become one of the most used ways of market communication. Viral marketing is evolving into the dominant form of marketing and exchange of information for the purpose of advertising, promoting, or achieving other goals. In this paper we present and analyse the phenomenon of viral marketing-its purpose, effects, and power of influence, and discuss it in terms of ethical and legal standards. Special emphasis is placed on the right to privacy and personal data protection, harassment, acting in good faith and in accordance with good business practices, the presentation of false or fraudulent information. The advantages and disadvantages of this type of marketing activity have been observed

Seasonal mortality variations of cardiovascular, respiratory and malignant diseases in the City of Belgrade

The main purpose of this paper is to examine seasonal variations in mortality resulting from cardiovascular diseases, respiratory diseases and cancer, as well as to provide a review of environmental factors underlying such phenomenon. The herein presented study was conducted on the territory of Belgrade based on the data on daily mortality rates obtained from the Institute of Public Health in Belgrade for the period 2009-2014, as well as the data on annual mortality rates provided by the Statistical Office of the Republic of Serbia for the period 2000-2014. The analysis of mortality variations was performed by the use of Theil-Sen method, smooth trend method and cubic spline interpolation, whereas desriptive tools, such as winter/summer ratio and dissimilarity index, were used to examine the seasonal pattern. According to the Institute of Public Health, over 113430 deaths were registered in Belgrade area for the period 2009-2014, out of which 53.25% is attributed to cardiovascular diseases, 4.01% to respiratory diseases and 27.50% to cancer. The annual mortality rates caused by cardiovascular diseases and cancer on the territory of Belgrade are among the highest ranking in Europe. The leading causes of death in the observed period included: cardiomyopathy, heart attack and stroke with accompanying complications, breast cancer in women, prostate and colorectal cancer in men, lung and bronchus cancer for both genders, and chronic obstructive pulmonary disease. Cardiovascular and respiratory mortality rates are significantly higher among people aged 65 and over, whereas more than one third of deaths caused by cancer is observed among younger people aged between 45 and 64 years. Research results show that seasonal variations were most pronounced in mortality resulting from cardiovascular and respiratory diseases, with highest mortality rates recorded in February and March and lowest during the summer season. Also, the number of deaths due to cardiovascular diseases increased twice, namely at the end of June and October, which is assumed to be the result of sudden temperature changes. Nonetheless, no such seasonal variations were observed in mortality caused by cancer. Seasonal variations in mortality resulting from cardiovascular diseases also indicate gender differences, which is why sudden temperature changes in interim periods affect more women than men. As regards deseasonalized trend, mortality caused by cardiovascular diseases stagnates, while mortality caused by cancer and mortality caused by respiratory diseases records moderate to severe increase. This is a uniform trend in almost all municipalities in Belgrade, with average mortality rates being higher in central zones than in suburbs over the last 15 years, particularly mortality caused by cancer. A slight increase in the overall mortality can also be attributed to aging of the population, which cannot be verified due to lack of available accurate data on the average age structure of Belgrade population for the observed period. A better understanding of seasonal variations in mortality caused by chronic non-communicable diseases can contribute to improving the population health care and rising awareness of the population concerning greater health care in changeable weather conditions due to global warming and climate change. These findings can also enhance preventive action on environmental risk factors that are not limited exclusively to weather conditions, such as air pollution

The impact of tourism on the economic growth in BiH

Tourism as socio-economic phenomenon reflectsdifferent influences (economic, social, political etc.), and in linewith it, it has an important role in the overall economic growth.The aim of this paper is to determine the contribution of tourismin the overall economic growth in Bosnia and Herzegovina (BiH)during the period of years 2006-2014. Using the methodologywhich used Čerović et al. (2015) for calculating the rate of realGDP growth and the contribution of tourism towards overalleconomic growth in countries in the region (Serbia, Macedonia,and Montenegro), in this paper we demonstrated that tourism, inthe observed period, had a modest direct contribution towardsoverall economic growth in Bosnia and Herzegovina

Antioxidant and Antimicrobial Activities of Extracts of Four Peucedanum L. Species

The present study describes antioxidant activity of methanol, ethyl acetate, acetone and water extracts of the dried aerial parts of four Peucedanum species (P. officinale, P. longifolium, P. aegopodioides and P. alsaticum). The highest yields of extracts were obtained using polar solvents. The total phenolic content of the tested extracts varied from 52.18 to 118.32 mg of gallic acid equivalent (GA)/g of extract and the total flavonoid content from 4.43 to 234.67 mg of quercetin equivalent (Qu)/g of extract. Antioxidant activity was analyzed in vitro using DPPH reagent, activity expressed as EC50 and obtained results ranged from 0.30 to 14.80 mg/mL and ABTS reagent, whose amounts ranged between 1.28 to 3.73 mg VitC/g. Synthetic antioxidant butilated hydroxyanisole (BHA) and Vitamin C were used as control. Antibacterial activity of all extracts tested showed minimal inhibitory concentration (MIC) which ranged between 5.0-160.0 mg/ml, while minimal bactericidal concentration (MBC) was 10.0-160.0 mg/ml. The results of antifungal activity of analyzed Peucedanum species showed antifungal activities in the MIC range of 10-160 mg/ml and MFC range of 20-160 mg/ml. This finding suggests that these species may be considered as a natural source of antioxidants and antimicrobial agents.Ministry of Education and Science of the Republic of Serbia [173029

Antioxidant and Antimicrobial Activities of Extracts of Four Peucedanum L. Species

The present study describes antioxidant activity of methanol, ethyl acetate, acetone and water extracts of the dried aerial parts of four Peucedanum species (P. officinale, P. longifolium, P. aegopodioides and P. alsaticum). The highest yields of extracts were obtained using polar solvents. The total phenolic content of the tested extracts varied from 52.18 to 118.32 mg of gallic acid equivalent (GA)/g of extract and the total flavonoid content from 4.43 to 234.67 mg of quercetin equivalent (Qu)/g of extract. Antioxidant activity was analyzed in vitro using DPPH reagent, activity expressed as EC50 and obtained results ranged from 0.30 to 14.80 mg/mL and ABTS reagent, whose amounts ranged between 1.28 to 3.73 mg VitC/g. Synthetic antioxidant butilated hydroxyanisole (BHA) and Vitamin C were used as control. Antibacterial activity of all extracts tested showed minimal inhibitory concentration (MIC) which ranged between 5.0-160.0 mg/ml, while minimal bactericidal concentration (MBC) was 10.0-160.0 mg/ml. The results of antifungal activity of analyzed Peucedanum species showed antifungal activities in the MIC range of 10-160 mg/ml and MFC range of 20-160 mg/ml. This finding suggests that these species may be considered as a natural source of antioxidants and antimicrobial agents.Ministry of Education and Science of the Republic of Serbia [173029