In this paper, chemical analysis of slag from abandoned medieval mine in Gornji Potočari, Srebrenica municipality was described. Total of 10 metals were analyzed: chromium, copper, cadmium, nickel, cobalt, zinc, silver, manganese, iron and lead. Traces of chromium, nickel, cobalt, copper, manganese and cadmium in the samples point to the fact that the starting ore also contained these elements. Results showed high content of iron (25.11–33.12%), lead (5.90–10.77%) and zinc (1.16–6.79%). The content of silver had a positive correlation with the content of lead, which is in favor of the initial hypothesis that the starting ore was galena (PbS). High zinc content indicates that the sphalerite (Zn,Fe)S was also used in the process, whereas iron most likely emanates from pyrite (FeS2). Galena and sphalerite can be found in Srebrenica area in large quantities. The results of the analysis show that the site was used for the production of lead and silver (from primary ores), intensive mining activity during the Middle Ages, and the latest date that we can account for slag origin is the end of the 16th century.

Abstract The goal of this study was to determine the content of 12 metals in 23 samples of teeth from two cities in Bosnia and Herzegovina (B&H): Sarajevo, a capital city with heavy traffic, industrial facilities, and long periods of smog during winter and Bihac, a picturesque small city, with no industrialization, settled among vivid national park and rivers. The teeth were separated into enamel and dentin. Dissolution of samples was performed in concentrated HNO3 with the addition of H2O2 followed by flame atomic absorption spectroscopy (FAAS) analysis. The results showed expected high contents of Ca, Na, Mg, and K, while elevated contents of Cu, Fe, and Zn were present in some samples. K and Na showed uniform distributions throughout enamel and dentin. Alkaline and earth-alkaline metals showed significant positive correlations. Zinc and manganese exhibited differences in the dentin content based on the place of residence. Zinc also displayed statistically significant differences between smokers’ and nonsmokers’ dentin samples. The differences were more pronounced between intra groups (within one sample) than for inter groups (within different groups, such as location, gender, and smoking).

Mushrooms have been a part of human diet in many regions of the world for centuries due to organoleptic characteristic as well as the nutritional values (Wang and Xu, 2014). In nature, there are over 150 000 different types of mushrooms but only 10% is known and designated (Wasser, 2010). However, only about 2 000 species are grown and cultivated for nutritional purposes. The consumption of the mushrooms has even increased remarkably over the past few decades (Gan et al., 2013). Mushrooms are tasteful food, full of proteins, rich in vitamin B, rich in different minerals and have almost all essential amino acids (Mujić et al., 2011). Examination of antioxidant activity in mushroom extracts and content of antioxidant compounds is currently very interesting aim of research.. Mushrooms are found to be rich source of these antioxidants with immense antiradical activity (Valentão et al., 2005). Phenolic acids were the major phenolic compounds reported in mushrooms. The antioxidant activity of anthocyanins including the protection of low density lipoproteins (LDL) against oxidation, has been demonstrated in a number of different in vitro systems. Phenols are important plant constituents because of their scavenging ability due to their hydroxyl groups (Hatano et al., 1989). In this study the radical scavenging activity (RSA) as well as the polyphenolic content and anthocyanins content of five edible mushrooms (Boletus edulis, Agaricus bisporus, Agaricus bisporus var. Avellaneous, Pleurotus ostreatus, Lentinula edodes) commercially available at Bosnian market was investigated. The amount of total phenol content was determined by Folin-Ciocalteu reagent method and total monomeric anthocyanin content was determined by pH differential spectrophotometric method. Bulletin of the Chemists and Technologists of Bosnia and Herzegovina