Livestock production is a potential environmental pollutan because of the high concentartions of animals on the small area. Production of biogas with anaerobic degradation from organic waste is one of the pledge alternative energetic solutions, especially from organic manure made from animal farming and other residuals of agricultural production.The aim of this paper was to determine posibillity of using manure different origin from extensive animal breeding for production of biogas in labaratory conditions. The results obtained will be based on posibillity of use waste streams from extensive animal husbandry as basic substrate for anaerobic digestion.In this regard, cosubstrates were formed as mixture 1 chicken excrement; mixture 2 sheep manure; mixture 3 cow manure; all three basic substrates were in mixture with the sludge from the wastewater treatment plant. The results showed production of 71,5 ml CH4/gVS for mixture 1, 68,65 ml CH4/gVS for mixture 2 and 48,68 ml CH4/gVS for mixture 3. KEYWORDS:extensive breeding, manure, anaerobic digestion, biogas, biomethane potentional

Bryophytes are a group of plants vital to many ecosystems and biogeochemical cycles and are well known bioindicators and biomonitoring tools. However, they have been deemed industrially less important than vascular plants and their potential for applications other than as biomonitoring tools has been overlooked. In recent years, however, bryophytes, and in particular mosses, are starting to gain attention as viable phytoremediation agents. Studies indicate that some moss species have the ability to uptake heavy metals such as Pb, Cd, Zn, Cu, As, and Cr from contaminated water. Tested mosses could both adsorb and absorb significant amounts of specific heavy metals without adverse effects on the plant. Results suggest that moss biomass, either dry or wet, could be used as a bio-sorbent in filtration of heavy metals. The review of available literature shows a promising prospect of moss to be used in phytofiltration of heavy metals. Existing knowledge on this topic could be the basis for further research which isneeded. KEYWORDS:moss; heavy metal; phytofiltration; bio-sorbent

Modern propellant, so-called smokeless type, is consisting primarily of nitrated cellulose, but frequently with nitroglycerine...

The aim of this research is to determine the significance of medicinal, edible and vitaminous plant species in meadow and forest ecosystems in the area of 232 km2, Municipality of Visoko, Bosnia and Herzegovina in September, October and November 2016. The phases of field and laboratory studies were applied as well as the numerical classification methods and ordination of the ecosystem. Studies on the natural potentials of plant species with beneficial properties have shown that families of Asteraceae and Rosaceae occupy the most important places; the most prominent life-form are hemicryptophytes; the most common floristic element is Submediterranean; out of the total number of 261 plant species determined, 148 species have healing properties, 125 are edible and 80 plant species are vitaminous. We conclude that the natural resources of the researched area are not sufficiently used and known. It is necessary to undertake some activities to raise awareness and knowledge about natural potentials.

Modern propellant, so-called smokeless type, is consisting primarily of nitrated cellulose, but frequently with nitroglycerine as well. Propellant consisting of nitrocellulose (NC) alone is termed single-base propellant, and those powders that contain nitroglycerine besides nitrocellulose are called double-base propellants [1]. Active compounds mainly decompose to nitrogen oxides (NO and NO2) that catalyze and accelerate the decomposition process and may lead to self-heating and auto-ignition. Stabilizers are added to propellants to stop such decomposition, being essential their addition in the propellant’s composition [2]. Powders and propellants must contain one or several additives called stabilizers, the function of which is to prevent chemical change in the energetic constituents over a reasonable period of time [3]. Nitrocellulose based propellants show a slow, but constant decomposition of nitrate ester groups under the formation of nitrogen oxides and nitric acids. These components catalyze the further decomposition of the propellant and may finally lead to an autocatalytic decomposition [4]. The article [5,6] explains the formation of nitric acid and nitric oxide in propellants in details, and the final result of the reactions is an increase in ambient temperature, which could Abstract

The biosensors are based on the electrons movement, i.e. electronic current determination as a reaction of enzyme-catalyzed redox reaction. Generally a normal contact voltage passes through the electrodes to analyze. In the enzymatic reaction which produces the substrate or product can transfer the electrons with the surface of electrodes to be reduced. As a result an alternate current flow can be measured. The substrate concentration is directly proportional to the magnitude of the current. The reduction of oxygen is acquired through the oxygen electrodes and it is a simple way to from an amperometric biosensor (Figure 2). The example is the determination of glucose by glucose. The above description is about the first generation of amperometric biosensor and it has a direct transfer of electrons which are released from the electrodes are having some difficulties. The second generation amperometric biosensors are developed in a mediator takes the electrons and transfer to the electrodes.