The paper presents relation for maximal pressure-volume work for closed systems by using principles of I and II law of thermodynamics, used in reversible processes in which mechanical and thermal balance has been achieved. For full interpretation of this problem for two characteristic cases, graphical review in p-v diagram is given, where in an obv...

By Branko Pejović, Mitar Perušić, Duško Kostić, Miladin Gligorić

U ovom radu je izvršena sinteza šest estarskih derivata 2,6 dimetil-4-supstituisane-1,4-dihidropiridin-3,5-dikarboksilne kiseline: dietil-2,6-dimetil-4-fenil-1,4-dihidropiridin-3,5 dikarboksilata, dietil-2,6-dimetil-4-(3’-nitrofenil)-1,4 dihidropiridin-3,5-dikarboksilata, dietil-2,6-dimetil-4-(4’ nitrofenil)-1,4-dihidropir...

By Tamara Mijatović, Milica Perić, Luka Matović, Marija Ristović, Saša Drmanić

The role of the materials used for packaging is to protect innercontent from external, mostly negative, factors. Besides beingsafe, and with good mechanical properties, these materials needto align with other consumers’ needs and demands, being bothattractive and authentic, while at the same time meetingecological requirements. Gelatin-based ...

By Filip Babić, Bojana Balanč, Nikola Milašinović

Among cereals, maize has the highest content of bioavailable micronutrients in grain, particularly β-carotene and α-tocopherol, which makes this crop the most appropriate for biofortification. Great genetic variability is a valuable source of micronutrients, and genotypes with enhanced grain content could be used for improvement of comme...

By Violeta Anđelković, Jelena Masarović, Mirjana Srebrić, Snežana Mladenović Drinić

The study aimed to evaluate the effect of black sesame andflaxseed flour addition in different proportions on bread quality.The bread formulations were developed through the RotationalCentral Composite Design (RCCD). The independent variableswere: black sesame and flaxseed flour which incorporated inamounts from 25.85% to 54.15%. The effect of the ...

By Rafael Audino Zambelli, Luan Ícaro Freitas Pinto, Edilberto Cordeiro dos Santos Junior, Ana Carolina Viana de Lima, Mayara Lima Goiana, Luciana Gama de Mendonça, Bárbara Guerra Rodrigues

Silver nanoparticles (AgNPs) were synthesized by “green”, cheap hydrothermal method in an autoclave using sodium citrate and Vascellum pratense polysaccharide extract as reducing and stabilizing agents. Presence of spherical AgNPs was confirmed by UV-VIS spectrophotometry and scanning electron microscopy; particle size was determined as...

By Predrag Petrović, Danijela Kostić, Anita Klaus, Jovana Vunduk, Miomir Nikšić, Đorđe Veljović, Leo van Griensven

The  main  constituents  of  ligno-cellulosic  (LC)  biomass  are  lignin,  celluloses  and  hemicelluloses,  complex polymers with  many  functional  groups,  which  can be modified with  the  purpose  to  improve the  sorption properties&...

By Zorica Lopičić, Tatjana Šoštarić, Jelena Milojković, Marija Mihajlović, Jelena Petrović, Ivan Antanasković, Mirjana Stojanović

Dietary fiber obtained from by-products of food industries acts as a potential functional food ingredient and used in baking, beverages and meat products. Soybean, a rich source of plant protein is a suitable substitute to dairy milk. Processing of soy milk leaves behind large quantities of fiber, which could be incorporated in food formulation as ...

By Bhavya S. N., Jamuna Prakash

While a liquid is dripping out of a capillary tube, there is a possibility to affect the characteristics of the exiting flow in certain ways. One of the ways already used is by introducing an electric field that can be used to change the average droplet diameter and the droplet size distribution. This process is called electrospraying, while the th...

By Stefan Bošković, Branko Bugarski

Zirconium is one of those few metals which are capable of dissolving relativelylarge quantities of oxygen. When heated in air at elevated temperatures, anoxide layer is built up at the metal surface. The oxidation of mechanicallypolished zirconium was studied in the range 500-900oC in air atmosphere, attemperature intervals of 100oC, for exposure t...

By Zagorka Koneska, Ružica Manojlović, Dafinka Stoevska-Gogovska