Biljana Curcic
University of Novi Sad, Faculty of Technology, Department Member
Research Interests:
Research Interests:
Dimethachlor is an herbicide used for oilseed rape protection. Previous studies have demonstrated its high mobility in the soil, which could lead to water contamination. This research aimed to determine the occurrence of dimethachlor and... more
Dimethachlor is an herbicide used for oilseed rape protection. Previous studies have demonstrated its high mobility in the soil, which could lead to water contamination. This research aimed to determine the occurrence of dimethachlor and its metabolites (dimethachlor ethanesulfonic acid ESA and dimethachlor oxalamic acid OA) in surface water using a recently developed analytical method. This article is one of the first to document dimethachlor and its metabolites’ presence in surface water samples. The samples were collected from the Danube river and Tisza river. The quantitative determination of dimethachlor and its metabolites in the obtained extracts was done by high-performance liquid chromatography. Descriptive statistical methods, including correlation analysis, cluster analysis, and principal component analyses, were utilized to analyze method validation experimental results. In addition, the artificial neural network (ANN) model was applied as an optimization tool. The devel...
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The negative external effects caused by traffic growth have been recognized as the main factors that degrade city quality of life. Therefore, research around the world is being conducted to understand the impact of traffic better and find... more
The negative external effects caused by traffic growth have been recognized as the main factors that degrade city quality of life. Therefore, research around the world is being conducted to understand the impact of traffic better and find adequate measures to reduce the negative impact of traffic growth. The central part of this research consists of mathematical models for simulating the negative consequences of congestion and noise pollution. Four non-linear models for determining noise levels as a function of traffic flow parameters (intensity and structure) in the urban environment were developed. The non-linear models, including two artificial neural networks and two random forest models, were developed according to the experimental measurements in Novi Sad, Serbia, in 2019. These non-linear models showed high anticipation accuracy of the equivalent continuous sound level (Laeq), with R2 values of 0.697, 0.703, 0.959 and 0.882, respectively. According to the developed ANN models...
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In sugar industry, there is a problem of the presence of undesirable macromolecules such as pectins in sugar beet juice. Separation of these compounds is done mostly by CaO. Calcium may cause undesirable process of alkalization of soil in... more
In sugar industry, there is a problem of the presence of undesirable macromolecules such as pectins in sugar beet juice. Separation of these compounds is done mostly by CaO. Calcium may cause undesirable process of alkalization of soil in the near environment of the sugar factory. The theoretical basis of new juice purificatin method based on the application of Al2(SO4)3, CaSO4 and their mixtures are presented. Two model solutions of pectin (0.1 % w/w) are investigated using a method of measuring zeta potential. Pure salts Al2(SO4)3 and CaSO4, showed better binding properties with the pectin than mixtures. Amount of all studied pure salts and mixtures of Al3+ and Ca2+ ions were significantly less (142 - 710 mg/gpectin) than the average amount of CaO used in classical process (about 9 g/gpectin). Mechanism of discharge of pectin macromolecules in the presence of mixtures of these ions using a model of double electric layer are suggested.
Research Interests:
Research Interests:
Research Interests:
The main objective was to examine the influence of different osmotic parameters on the mass transfer kinetics during osmotic treatment of pork meat (M. triceps brachii). The system?s response parameters observed were: water loss (WL),... more
The main objective was to examine the influence of different osmotic parameters on the mass transfer kinetics during osmotic treatment of pork meat (M. triceps brachii). The system?s response parameters observed were: water loss (WL), solid gain (SG), final dry matter content (DM) and water activity (aw). The optimum osmotic parameters seem to be: osmotic time of 4 h, molasses solution concentration of 72% and solution temperature of 45oC. These conditions were determined using Response Surface Methodology (RSM), and by superimposing the contour plots of each process variable. The predicted responses for the optimum drying conditions were: DM of 64.5%, WL in the close vicinity of 0.53, SG about 0.15 and aw in the range of 0.83 to 0.84.
Research Interests:
Research Interests:
Mass transfer of pork meat cubes (M. triceps brachii), shaped as 1×1×1 cm 3 , during osmotic dehydration (OD) and under atmospheric pressure was investigated in this study. The effects of different parameters, such as concentration of... more
Mass transfer of pork meat cubes (M. triceps brachii), shaped as 1×1×1 cm 3 , during osmotic dehydration (OD) and under atmospheric pressure was investigated in this study. The effects of different parameters, such as concentration of sugar beet molasses (60–80 mass%), temperature (20–50 °C), and immersion time (1–5 h) in terms of water loss (WL), solid gain (SG), final dry matter content (DM), and water activity (a w), were investigated using experimental results. Five artificial neural network (ANN) models were developed for the prediction of WL, SG, DM, and a w in OD of pork meat cubes. These models were able to predict process outputs with coefficient of determination, r 2 , of 0.990 for SG, 0.985 for WL, 0.986 for a w , and 0.992 for DM compared to experimental measurements. The wide range of processing variables considered for the formulation of these models, and their easy implementation in a spreadsheet calculus make them very useful and practical for process design and control.