| CHEMISTRY | | |
| Bo Zhou | On the Energy of a Graph | 5 |
Đorđe Baralić Ivan Gutman Branislav Popović | Solution of the Türker Inequality | 13 |
Ivan Gutman Boris Furtula Olga Miljković Marija Rakić | Families of Equiseparable Trees and Chemical Trees | 19 |
Ivan Gutman Boris Furtula | Effect of Ethyl Groups on the Relation Between Zenkevich and Wiener Indices . | 31 |
BIOLOGY | | |
Natali Svilokos Ljiljana Čomić Svetlana Varadinac | Determination of the Total Number of Aerobic Mezzophilic Bacteria, Enterobacteriaceae and Potential Pathogenes in the Slaughterhouse by Means of Standard And 3m Petrifilmtm Methods | 43 |
| Snežana Simić | Changes in Structure of the Phytoplankton in the Barje Reservoir (Serbia) | 53 |
Mirjana Staletić Srbobran Stojanović Aca Marković | The Virulence Spectrum of Puccinia graminis tritici from Different Berberis Species | 65 |
Desimir KneževićNovo PržuljVeselinka ZečevićNevena ĐukicVojislava MomčilovićDragoljub Maksimović Danica Mićanovic Biljana Dimitrijević | Breeding Strategies for Barley Quality Improvement and Wide Adaptation | 75 |
Veselinka ZečevićDragoljub ĐokićDesimir KneževićDanica Mićanović | The Influence of Nitrogen Foliar Application on Yield and Bread Making Quality Parameters of Wheat Table | 85 |
Gorica Đelić Aca Marković Branimir Petković | Variation in Verbascum phoeniceum L. Seeds Grown on the Different Type of Soils | 91 |
Aleksandar Ostojić Vladica Simić Snežana Simić | Qualitative Composition of Rotatoria in the Timok River and Its Tributaries in Summer | 103 |
| Aleksandar Ostojić | Faunistic Composition of the Zooplankton of Lake Bubanj | 107 |
| Bela F. Blesić | Some New Data on Investigations of Proturas and Dipluras Distribution in Serbia | 111 |
| Snežana Pešić | Weevils Fauna (Coleoptera: Curculionoidea) of Gruža Reservoir (Central Serbia) Table | 115 |
| Snežana Pešić | The First Findings of Acallocrates colonnellii Bahr, 2003 (Coleoptera: Curculionoidea, Curculionidae, Cryptorhynchinae) in Central Serbia | 131 |