The extraction of gallic acid from the pomegranate peel was carried out in a column with a diameter of 40 mm, in which pomegranate peel grains with a diameter of 2 mm were placed in a packed bed. The extraction fluid is recirculated through the system using a centrifugal pump. The fluids used in the extraction are: water, ethanol:water=50:50 and et...

By Darko Jaćimovski, Katarina Šućurović, Dunja Šijaković, Jelena Živković, Katarina Šavikin

Occupational Health and Safety (OH&S) and other management systems are crucial in enhancing the operational activities of organizations in regional countries improving their public image and ensuring safety. Despite the evident advantages, the practical implementation and integration of these systems frequently present substantial challenges. T...

By Željko Đurić, Nataša Cvijanović, Mitar Perušić, Duško Kostić, Jelena Vuković, Nebojša Vasiljević

The Plavica deposit is located in the northwestern part of the Zletovo ore field, which belongs to the central part of the Kratovo-Zletovo volcanic area in the Republic of North Macedonia. Two mineralogical-geochemical ore zones have been formed in the deposit: upper one - oxide (secondary) with an Au content of 0.8 to 2 gr/t and lower one - sulfid...

By Goce Zlatkov, Katica Radinska, Sanja Gacova