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ISSN 2738-0971 eISSN 2738-1013 Bulletin of Natural Sciences Research Vol. 10, No 2, 2020. BULLETIN OF NATURAL SCIENCES RESEARCH Published by Faculty of Sciences, University in Priština – Kosovska Mitrovica Republic of Serbia Focus and Scope Bulletin of Natural Sciences Research is an international, peer-reviewed, open access journal, published semiannually, both online and in print, by the Faculty of Sciences – Kosovska Mitrovica, Republic of Serbia. The Journal publishes articles on all aspects of research in biology, chemistry, geography, geoscience, astronomy, mathematics, computer science, mechanics and physics. Directors Nebojša V. Ţivić Editor in Chief Nebojša V. Ţivić Associate Editors Ljubiša Koĉinac; Vidoslav Dekić; Ĉaslav Stefanović; Branko Drljaĉa; Aleksandar Valjarević. Editorial Board Gordan Karaman, Montenegro; Gerhard Tarmann, Austria; Ernest Kirkby, United Kingdom; Nina Nikolić, Serbia; Predrag Jakšić, Serbia; Slavica Petović, Montenegro; Momir Paunović, Serbia; Bojan Mitić, Serbia; Stevo Najman, Serbia; Zorica Svirĉev, Serbia; Vera Vukanić, Serbia; Ranko Simonović, Serbia; Miloš Đuran, Serbia; Radosav Palić, Serbia; Sneţana Mitić, Serbia; Slobodan Marković, Serbia; Milan Dimitrijević Serbia; Sylvie Sahal- Brechot, France; Milivoj Gavrilov, Serbia; Jelena Golijanin, Bosnia and Herzegovina; Dragoljub Sekulović, Serbia; Dragica Ţivković, Serbia; Ismail Gultepe, Canada; Stefan Panić, Serbia; Petros Bithas, Greece; Zoran Hadzi-Velkov, R. Macedonia; Ivo Kostić, Montenegro; Petar Spalević, Serbia; Marko Petković, Serbia; Milan Simić, Australia; Darius Andriukaitis, Lithuania; Marko Beko, Portugal; Milcho Tsvetkov, Bulgaria; Gradimir Milovanovic, Serbia; Ljubiša Koĉinac, Serbia; Ekrem Savas, Turkey; Zoran Ognjanović, Serbia; Donco Dimovski, R. Macedonia; Nikita Šekutkovski, R. Macedonia; Leonid Chubarov, Russian Federation; Ţarko Pavićević, Montenegro; Miloš Arsenović, Serbia; Vishnu Narayan Mishra, India; Svetislav Savović, Serbia; Slavoljub Mijović, Montenegro; Saša Koĉinac, Serbia. Technical Secretary Danijel B. Đošić Editorial Office Ive Lole Ribara 29; 38220, Kosovska Mitrovica, Serbia, e-mail: [email protected], [email protected]; fax: +381 28 425 397 Printed by Sigraf, Ćrila i Metodija bb, 37000 Kruševac, tel: +38137427704, e-mail: [email protected] Available Online This journal is available online. Please visit http://www.bulletinnsr.com to search and download published articles. ISSN 2738-0971 eISSN 2738-1013 Bulletin of Natural Sciences Research Vol. 10, No. 2 2020. University in Priština – Kosovska Mitrovica Faculty of Sciences Republic of Serbia BULLETIN OF NATURAL SCIENCES RESEARCH Vol. 10, No 2, 2020. CONTENTS BIOLOGY Predrag Vasić, Tatjana Jakšić, Gorica Đelić IMPACT OF PB, NI AND CD ON THE GERMINATION OF BARLEY SEEDS, VARIETY JADRAN ..…. 1-6 Rajko Roljić, Vera Nikolić, Nebojša Savić MORPHOLOGICAL VARIABILITY AND SEXUAL DIMORPHISM OF NOBLE CRAYFISH Astacus astacus FROM THE BALKANA LAKE …...……………………………………………................................ 7-11 CHEMISTRY Vidoslav Dekić, Niko Radulović, Milenko Ristić, Biljana Dekić, Novica Ristić SYNTHESIS AND COMPLETE NMR SPECTRAL ASSIGNMENTS OF NEW BENZYLAMINO COUMARIN DERIVATIVE ………………………………………….……………………………….....…. 12-16 Vladan R. Đurić, Nebojša R. Deletić SPECTROPHOTOMETRIC DETERMINATION OF ASCORBIC ACID BY HORSERADISH PEROXIDASE ........................................................................................................................................................................... 17-22 GEOGRAPHY, GEOSCIENCE AND ASTRONOMY Saša Milosavljević, Jovo Medojević CONTEMPORARY CHANGES IN THE ETHNIC STRUCTURE OF THE POPULATION IN THE AUTONOMOUS PROVINCE OF KOSOVO AND METOHIJA …………………………………….…..... 23-27 Ivana Penjisević, Jovan Dragojlović FUNCTIONAL TRANSFORMATION OF WEST MORAVA VALLEY DISTRICT SETTLEMENTS ………………………………….........……………………………………………………………………….. 28-33 MATHEMATICS, COMPUTER SCIENCE AND MECHANICS Gordana Jelić, Dejan Stošović SOME MATHEMATICAL CONCEPTS IN GEOMETRY OF MASSES ……………................................. 34-37 Eugen Ljajko MATHEMATICS TEACHER’S PERCEPTIONS ABOUT INFLUENCE OF DIFFERENT ICT USAGE STRATEGIES ON THEIR COMPETENCIES …………………………………….…………….…………. 38-42 Izzet Fatih Senturk , Nurettin Gökhan ADAR, Stefan Panić, Časlav Stefanović, Mete Yağanoğlu, Bojan Prilinčević COVID-19 RISK ASSESSMENT IN PUBLIC TRANSPORT USING AMBIENT SENSOR DATA AND WIRELESS COMMUNICATIONS …………................................................................................................ 43-50 Slaviša Đukanović, Vladimir Mladenović, Milan Gligorijević, Danijela Milošević, Ivona Radojević Aleksić SPATIAL CHARACTERIZATION OF TELECOMMUNICATION SATELLITES VISIBLE ABOVE THE REPUBLIC OF SERBIA …………………...…………………………………………….............................. 51-58 PHYSICS Ljiljana Gulan, Tatjana Jakšić, Biljana Milenković, Jelena Stajić ELEMENTAL CONCENTRATIONS AND SOIL-TO-MOSS TRANSFER FACTORS OF RADIONUCLIDES IN THE ENVIRONMENT OF NORTH KOSOVO AND METOHIJA …………………………………... 59-64 Milan S. Dimitrijević ON THE STARK BROADENING OF Os II SPECTRAL LINES …...……………………………………...65-70 Bulletin of Natural Sciences Research DOI: https://doi.org/10.5937/bnsr10-23916 Vol. 10, No. 2, 2020, pp. 1-6. Original Scientific Paper IMPACT OF PB, NI AND CD ON THE GERMINATION OF BARLEY SEEDS, VARIETY JADRAN PREDRAG VASIĆ1, TATJANA JAKŠIĆ1, GORICA ĐELIĆ2 1Faculty of Sciences, University in Priština - Kosovska Mitrovica, Kosovska Mitrovica, Serbia 2Department of Biology and Ecology, Faculty of Science, University of Kragujevac, Kragujevac, Serbia ABSTRACT The aim of this study was to determine the effect of lead, nickel and cadmium on the germination of barley seeds (Hordeum vulgare L.) of Jadran variety. Based on the percentage of germination, germination energy, and root and hypocotyl length, authors done an analysis of the effects of PbCl2, NiCl2, CdCl2 solutions, in concentrations of 103 mol/m3, 102 mol/m3, 10 mol/m3, 1 mol/m3, 10 -1 mol/m3, 10-2 mol/m3. The results showed that germination and germgrowthin stress conditions which are caused by heavy metals depend on the type of metal and its concentrations. The most toxic effect of alltested solutions had CdCl2, and the weakest toxic effect had PbCl2. Keywords: Hordeum vulgare L., Lead, Nickel, Cadmium, Germination. barley (H. vulgare ssp. distichum), transitional barley (H. vulgare INTRODUCTION ssp. intermedium), row barley (H. vulgare ssp. polystichum). It has short vegetation, and it istolerantto low temperatures, The harmful effects of heavy metals in soil are reflected in drought, salts, and basic soil reaction (Poehlman et al., 1985). the entire ecosystem (Kabata-Pendias, 2011). By accumulation In order to obtain higher yields and better grain quality, in soil, heavy metals are involved in biochemical processes of numerous tests are being carried out to create new varieties element circulation, and in food chains. As a consequence of an resistant to biotic and abiotic stress (Zhang et al., 2001). So far, inadequate application of chemicals, artificial fertilizers, etc. in 124 varieties of barley have been created in the Republic of agriculture, an increased amount of heavy metals occurs in Serbia (Madic et al., 2011). agricultural land, which leads to the manifestation of their Barley (H. vulgare) is the most widespread of all cereal. It phytotoxic and negative impact on the quality of plant products has a very rich nutritional value because it contains a large (Rajkovic et al., 2012., Djelic et al., 2012., Pesko et al., 2011). amount of vitamin B complex, and vitamins A, E, K, D. It is an Plants that grow or which are cultivated on contaminated land excellent source of vegetable fibers, proteins, phosphorus, present health hazard for animals and human population. magnesium, zinc, iron, etc. Only 200g of barley contain 55 % of Maximum permitted levels (MPL) of hazardous and the recommended daily amount of vegetable fiber. It is gluten noxious substances in soil and irrigation water, which can free and easy to digest, and due to its medicinal properties it is damage or alter the agricultural production capacity and the recommended that people consume this valuable food frequently quality of irrigation water, coming from discharges from (Tanner et al., 2016). factories, dumping, improper use of mineral fertilizers and Table 1. Maximum permitted levels. preservatives plants, are regulated in the Republic of Serbia by the Rulebook on the allowed quantities of dangerous and harmful Chemical Maximum Maximum substances in soil and water for irrigation and methods of their elements permitted levels permitted levels testing. If land contains more than the maximum allowed levels in soil in water (Tab.1), than it is not recommended for agricultural production. mg/kg soil mg/lwater Barley is considered to be one of the oldest, most widespread Cadmium to 3 to 0.01 cereal in Europe. It has been cultivated for over 10,000 years Lead to 100 to 0.1 (Salamini et al., 2002). Nickel to 50 to 0.1 The species of the genus Hordeum have a basic number of chromosomes 7. Grown barley Hordeum vulgare L. ssp. vulgare The Jadran variety is spring barley which is cultivated and its wild ancestor H. vulgare L. ssp. spontaneum (C. Koch.) during summer time. It is characterized by a low stalk and good Thell. are diploid species with 2n = 14 chromosomes. resistance to lodging. The quality of the grain and malt is All cultivated forms of barley belong to species Hordeum excellent. The aim of this study was to determine the effect of vulgare L., which