In addition to their undeniable importance for industry, natural plant products are widely used in the production of functional food, which, in addition to satisfying nutritional properties, also exhibits certain pharmacological and physiological effects on human health. Chokeberryfruit and products are considered to be excellent sources of polyphenoliccompounds. A large part of polyphenolic compounds from aronia berriesis found in the juice, but the flesh of the berry that remains behind in the juice production process is also richin these bioactive compounds. The aim of the conducted research was to examine the antioxidant potentialof thechokeberry juices from Bosnia and Herzegovina.The antioxidant potentialof chokeberryjuicesin this study wastestedbythe ferric reducing antioxidant power(FRAP)andtotal phenol content (FC). Tests were carried out in other juices for the same parameters in order to compare the obtained values.The research results show that the values of FRAP and total phenols in chokeberry juices vary (20-63 mmol Fe II/L; 850-4930 mgGAE/L), but are significantly higher than in other analyzed juices (7-25 mmol FeII/L; 220–1265 mgGAE/L). By comparing the content of total phenols and FRAP values in pasteurized and unpasteurized chokeberry juice samples, it can be concluded that they are higher in the sample prepared by the pasteurization process. Statistical parameters showthat thelinearcorrelation between thetotal phenols and the FRAP valuesof chokeberry juices (r=0,964; p ˂0,001) and other analysedjuices (r=0,960;p ˂0,001 ) isstatisticallysignificant. KEYWORDS:chokeberry(Aronia melanocarpaL.)juice,antioxidant potential, FC, FRAP

A well-developed immune system of the organism, which, among other things, arises as a result of a healthy lifestyle, is a prerequisite for a healthy and quality life. Natural food products, primarily honey and other bee products, greatly contribute to the proper development of the body's immune response to the harmful effects of foreign substances. Honey and other bee products are a valuable and rich source of biologically active substances. They have been used for centuries in traditional medicine, due to their wide range of antibacterial, antiradical, antioxidant and anticancer effects, as well as their supportive effect in the prevention and treatment of many diseases. Consumption of honey contributes to the improvement of immunity and enriches the human diet with many valuable nutrients and bioactive substances. Bioactive substances, including polyphenols, are organic chemical compounds naturally present in honey. Polyphenols are important secondary metabolites of plants that are transferred to honey along with nectar, pollen or propolis. Several studies have confirmed the immunomodulatory role of the basic phenolic compounds present in honey. For the purpose of our research, a total of 21 samples of honey and 10 samples of alcoholic propolis extract were collected, mostly from the Federation of Bosnia and Herzegovina. Based on the obtained results, it is clear that honey itself is a rich source of antioxidants in the diet, but that the addition of propolis significantly increases its antioxidant power. The addition of propolis to honey significantly increased the antioxidant activity of all analyzed samples. After the addition of propolis, the highest antioxidant activity was again shown by a sample of forest honey from the area of Bihać, Una-Sana Canton (Š5) and its antioxidant activity is 1143.96 µmol Fe (II) / L. The lowest antioxidant activity after the addition of propolis was shown by the meadow sample of honey from Sanski Most, Una-Sana Canton, (L21), 462.71 µmol Fe (II) / L.Based on the presented results, it is clear that after the addition of propolis in the analyzed honey samples there was a significant increase in the concentration of polyphenols by an average of 11.96%.

The antioxidants present in natural food products show a higher antioxidant activity than synthetic one [1]. Polyphenolic compounds are the most important antioxidants in bee honey. Bee honey is the most popular bee product by human [2]. In addition to the polyphenols there are non-phenolic compounds with antioxidant potential, such as proteins, gluconic acid, L-ascorbic acid, hydrogen peroxide, hydroxyl methyl furfural (HMF), Maillard reaction products, etc. The antioxidant activity of honey largely depends on the content of micro biogenic elements. The aims of this paper are to present the complex role of micro biogenic elements in the human. It is especially important to point out micro biogenic elements that can act both as antioxidants and as pro-oxidants, such as Cu. Cu acts as antioxidant because it is an integral part of some enzymes involved in the antioxidant activity of the organism. Cu in honey also acts as a pro-oxidant through Haber-weis reaction with L-ascorbic acid also present in honey. In addition to being an essential micro-nutrient Cu is potentially very hazardous because of the capacity change in oxidation state leading to the initiation of the reaction in which free radicals are formed. Therefore, the balanced intake of copper and other trace elements in the human body is very important. Therefore, changes in the antioxidant activity of food are the result of chemical changes in antioxidant active compounds present in the food product.

386 Published By: Blue Eyes Intelligence Engineering and Sciences Publication © Copyright: All rights reserved. Retrieval Number: 100.1/ijeat.E28430610521 DOI:10.35940/ijeat.E2843.0610521 Journal Website: www.ijeat.org Abstract: Humans are generally exposed to a variety of pollutions present in the air they breathe, the food they eat or in the water they drink. Some of the most dangerous pollutions are metals and heavy metals. These are naturally occurring substances which are harmless when present in the environment at low levels. However, due to many pollutants such as industry processes or war activities, the heavy metal concentration can exceed the limit of tolerance and become very toxic for the natural environment and living organisms in it, including humans. Unlike organic pollutants, the heavy metals (as ions and as particulate matter) once introduced into the environment cannot be biodegraded and remain there indefinitely. By rainfall these pollutants can be partially transferred from air or soil into the rivers and drinking water sources, where they accumulate in even higher toxic levels. The high concentrations of heavy metals in contaminated natural water reservoirs have an impact on the microbial community composition which resides there. This type of water pollution can cause the changes in life cycles of natural bacterial populations, influencing their metabolic processes and proliferation. The presence of pathogens in water is normally indirectly determined by the testing for “indicator organism” such as coliform bacteria. Coliforms are usually present in larger numbers in contaminated water and at the same time they are indicators of whether other pathogenic bacteria are present, too. In crisis situations, like war or some natural disasters, where trusted sources of drinking water are not available anymore, the military and residents of affected areas are forced to use some alternative water resources that cannot be tested for their microbial or metal contamination properly. Therefore, the existence of some fast test that would detect not only dangerous bacterial pathogens in water, but also the presence of metals and heavy metals as well, would be of great help and importance for the human health. Even though the number of pathogens can be drastically reduced by the boiling of water, the heavy metals are not destroyed by high temperature. Hence the main objective of our work was to optimize the biosensor chip for microbial detection in contaminated water that would serve at the same time as an indicator for the chemical composition of the water,

The research includes analysis of: pH value, organic matter content, and the total concentration of manganese in eleven soil samples from different localities northeast of Bosnia and Herzegovina. Sequential extractions of soil samples were also performed to determine the content of some form of binding manganese. Concentration of manganese in the flowers of calendula were also found and tested at these sites. From the obtained measurement, BCF (Bioconcentration Factor) values were calculated for the tested metal. Soil pH had values from 7.84 to 8.54, which puts them in the category of alkaline and strongly alkaline soil. The total concentration of manganese measured in soil samples do not exceed the limit values or are above average values. In the analyzed soil samples, the minimum content of manganese in the exchangeable fraction and the largest in the residual fraction and bound for oxides of manganese and iron. The concentrations of manganese in the flowers of calendula have not exceeded the permitted value. Statistical analysis of the results showed a weak linear correlation between pH value of an aqueous solution of the soil and the content of manganese in the flower, and linear correlation between manganese in the exchangeable fraction and the content of manganese in the flower. The calculated BCF values are very low and suggest that calendula growing on alkaline soil hasn’t got an expressed potential for accumulation of manganese.

The antioxidants present in natural food products show a higher antioxidant activity than synthetic one [1]. Polyphenolic compounds are the most important antioxidants in bee honey. In addition to the polyphenols there are non-phenolic compounds with antioxidant potential, such as proteins, gluconic acid, L-ascorbic acid, hydrogen peroxide, hydroxyl methyl furfural (HMF), Maillard reaction products, etc. The antioxidant activity of honey largely depends on the content of micro biogenic elements. Cu acts as antioxidant because it is an integral part of some enzymes involved in the antioxidant activity of the organism. Cu in honey also acts as a pro-oxidant through Haber-weis reaction with L-ascorbic acid also present in honey. In addition to being an essential micro-nutrient Cu is potentially very hazardous because of the capacity change in oxidation state leading to the initiation of the reaction in which free radicals are formed. Therefore, the balanced intake of copper and other trace elements in the human body is very important. Therefore, changes in the antioxidant activity of food are the result of chemical changes in antioxidant active compounds present in the food product.

The results of investigation of  inorganic and organic speciation of copper compounds  in  the lake Modrac, using the geochemical equilibrium model  BLM (Biotic Ligand Model; USEPA 2007) and other geochemical models are presented, as well as toxicity and bioavailability of copper compounds in the lake Modrac for chosen biotic ligand of fish fathead minnow (Pimephales promelas). Speciation and bioavailability of copper complexes was investigated and toxicity levels for chosen biotic ligand determined. The influence of water chemistry on copper toxicity is predominant, and application of sophisticated BLM model enables the prediction of toxicity and bioavailability of copper.