Family Lamiaceae (labia) includes a large number of cosmopolitan speciesincluding Thymus alpestris (Thyme) characterized by the presence of essential oilsand phenolic compounds. It represents a perennial semi-shrubby plant. Theantioxidant potential of thyme is due to the presence of polyphenolic acids andflavonoids. The topic of this paper is the e...

By Ljubica Vasiljević, Mirjana Beribaka, Jelena Vulinović, Slađana Petronić

The objectives of this study were to develop and validate the mathematicalmodel (kinetic and reactor model) of composting process, as well to usedvalidated model in order investigate the effects of the air flow rate on organicmatter conversion, carbon dioxide concentration and mixture temperature. Themathematical model incorporated two microbial po...

By Nesib Mustafić, Ivan Petrić, Ervin Karić

In this work, the design and usage of biosorbents made of apricot shells (Prunus armeniaca L.), Na-alginate and bentonite, for heavy metals removal from wastewaters, were investigated. The effect of particle size on the biosorption process, were investigate and the smallest fraction, was immobilized in Na-alginate. Immobilization had a positive eff...

By Tatjana Šoštarić, Marija Petrović, Zorica Lopićić, Jelena Petrović, Jelena Milojković, Marija Mihajlović, Mirjana Stojanović

Cereal crops as a basic food for humans, little is used as a grain, but with millingthey are processed in the milling products: flour, meal, flakes and bran.Determining the content of some ingredients, such as protein, ash, wet gluten,fat, etc. in food products is important because they are present in the rawmaterials and final products. The import...

By Marija Menkinoska, Vinko Stanoev, Valentina Pavlova, Tatijana Blazevska, Victorija Stamatovska, Natasa Gjorgovska

Based on relations for the maximum work at the closed thermodynamic system, the paper presents implementation of a general model for determining the minimum storage volume for compressed air. Due to the mechanical and thermodynamic imbalance of observed model, there are the conditions for obtaining the maximum work. Derived relations, which represe...

By Mitar Perušić, Branko Pejović, Radislav Filipović, Milenko Smiljanić, Mirko Radić

Our recent study on consolidation of marble samples with the purpose of culture heritageprotection occurred by periodical calcium oxalate precipitation on top of quasi parallelepipedicsamples. The overall process consisting of three stages of treatment, starting with 5 % calciumacetate solution for 60 minutes at 20°C, a draining step at 70°...

By Rihana Terzu, Edlira Baraj, Shun Yu, Christiane Förester, Holger Kropf, Kledi Xhaxhiu, Marsilda Come

The fruit of plane trees is used to obtain the powdered activated carbon. As the activating agent is used in the preparation of concentrated phosphoric acid. Completed the equilibrium adsorption of cationic methylene blue dye in the synthesized material. These results were fitted with three adsorption equilibrium model. The experimental results wer...

By Vladimir Dodevski, Branka Kaluđerović, Sanja Krstić, Đuro Čokeša, Danijela Brković

In this study the 3D surface model was successfully applied in investigating the influence of theprocess parameters on the physical and mechanical properties of the glass-ceramics. Glassceramicswas produced from coal fly ash and waste glass through the sintering method. The rawmaterial was taken from “REK Bitola”, a thermal power plant ...

By Biljana Angjusheva, Emilija Fidancevski, Kiril Lisichkov, Vojo Jovanov

Encapsulation strategy has emerged as a mean to protect sensitive bioactive compounds, toimprove their stability and to deliver their active forms to the targeted place. A number ofbioactives can be encapsulated – cells, enzymes, vitamins, minerals, aromas and flavours, foodcolourants, antioxidants, etc. Over the years various encapsulation t...

By K. Trifkovic, G. Tadić, B. Bugarski

New challenges faced by the company at the beginning of the 21st century require new approaches to quality management. Customer perception of the products and service quality is considered one of the key determinants of business performance and for the survival of the organization in a competitive market, and therefore the necessity of continuous m...

By Sonja Ćortoševa, Emilija Gavranska-Nečev