This paper presents data on the diversity and distribution of Balkan endemic vascular plants on the Konjuh Mountain in northeastern Bosnia and Herzegovina. Konjuh is characterized by geological heterogeneity and a significant proportion of ophiolitic substrate, which supports the development of endemic-relict serpentinophytes. A total of 31 endemic and four subendemic taxa were recorded in the surveyed area. Among these, Caryophyllaceae, with five recorded endemic taxa, is the most abundant family. The analysis of life forms and chorological spectra showed a dominance of hemicryptophytes and taxa from the South European and Mediterranean-Sub-Mediterranean chorological groups. The majority of endemic and relict taxa in the surveyed area are serpentinophytes. A total of 18 recorded taxa are listed as threatened according to the Red List of Flora of the Federation of Bosnia and Herzegovina. The species findings are presented with a distribution map. The distribution range of endemic and endangered taxa in Konjuh extends beyond the protected area. The results provide a list of locations of particular interest for further research and potential protection due to the diversity of endemic taxa.

This study deals with the unfolded quantities based on the time intervals between successive neutron events from the aspect of the power law. Neutrons from spontaneous fission in special nuclear material induce fission in most cases. In this study, it was demonstrated that the inverse value of the number of induced neutrons decreases following a power function with the increasing radius of a plutonium metal sphere. In addition, it was considered an increase in the neutron background level with increasing altitudes. The inverse value of the mean neutron counting rate depending on altitudes can be described with a power function merely for higher elevations. A linear relationship was obtained by plotting the quantities on logarithmic axes against each other indicating generally a power law relationship for both investigated phenomena. The results of this study showed a connection between two seemingly unrelated neutron phenomena through power laws based on the distributions of time intervals between successive neutron counts. The empirical evidence implies that a connection between the observed quantities in a log-log plot is unchanged except for a multiplicative constant.

This paper contains results from ichthyofaunal research of freshwater fish in Bosnia and Herzegovina during 20th and at the beginning of twenty-first century. We found presence of more than 100 parasitic species from different groups in 52 freshwater fish species from Black Sea and Adriatic basins and some breeding ponds. Detected parasites belong to Trematoda – 25 species, Monogenea – 15, Cestoda – 16, Nematoda – 15, Acanthocephala - 11, Oligohymenophorea - 5, Phyllopharyngea - 3, and Copepoda – 2 species. Other detected parasite groups are Kinetoplastea, Trepomonadea, Myxosporea, Myxoza, Ichthyostraca, Clitellata and Bivalvia with one species each. This study shows the necessity of research of complete parasitic fauna of freshwater fish in Bosnia and Herzegovina.