The aim of the present study was to investigate chemical profile and antioxidant activity essential oils obtained from most commonly grown plant species in Serbia. Aromatic medicinal plants Lamiaceae (Mentha x Piperita, Ocimum basilicum, Origanum majorana, vulgare, Salvia officinalis, Satureja hortensis, montana Thymus vulgaris), Asteraceae (Ehinacea purpurea Matricaria chamomilla), Apiaceae (Anethum graveolens, Carum carvi, Foeniculum Petroselinum crispum Pimpinella anisum) Cupressaceae...

ABSTRACT This research focused on obtaining high‐quality caraway essential oil (CEO) through hydrodistillation (HD) at 205 and 410 W, novel microwave‐assisted HD (MWHD) techniques 180, 360, 600, 800 W. Distillation kinetic, with four models, were examined to compare the quality of MWHD CEO. Characterization CEOs included in vitro antioxidant activity, antimicrobial chemical profiling. Models I IV provided best fit for experimental results. The CEO obtained by W exhibited highest activity...

The aim of this research was to investigate the effect new, non-conventional starter culture on kinetics lactose transformation during milk fermentation by kombucha, at pH 5.8; 5.4; 5.1; 4.8; and 4.6, two different temperatures 37 °C 42 °C. Milk lasted significantly shorter (about 5 h, 30 min) compared Changes concentration both are consisting retaining stages very steep decline in-between. analysis rate curves showed that reaction passes through maximum after 9 min 4 h sigmoidal saturation...

A new generation biomass-based filler for natural rubber, ‘hydrochar’ (HC), was obtained by hydrothermal carbonization of hardwood waste (sawdust). It intended as a potential partial replacement the traditional carbon black (CB) filler. The HC particles were found (TEM) to be much larger (and less regular) than CB: 0.5–3 µm vs. 30–60 nm, but specific surface areas relatively close each other (HC: 21.4 m2/g 77.8 m2/g), indicating considerable porosity HC. content 71%, up from 46% in sawdust...

Abstract A biochar made by hydrothermal carbonisation treatment of hardwood waste biomass was compared with traditional carbon black (CB) filler and their impact on the electricity consumption rubber mixture, vulcanisation mechanical properties examined. Two sets experiments were conducted, following same procedure recipe using different contents (parts per hundred) or CB as a (0, 10, 20, 30, 40 50 phr). The low content fillers (up to 20 phr) showed similar for mixing. Further increase...

Proteolysis and texture profile of Petrovská klobása, made with addition starter culture, were investigated during the ripening in different conditions (traditional versus industrial). Due to intensive degradation myofibrillar proteins, significant increases non-protein nitrogen free amino acids contents registered all samples. Similar proteolytic changes found both non-starter sausages, but more pronounced samples ripened industrial room. In relation hardness chewiness differed...

The kinetic model, encompassing the curing and reversion phenomena of NR/SBR rubber vulcanization process, was developed by means finite element method simultaneously with heat transfer equations, including generation due to reactions. simulation conducted for three spheres different diameters (1, 5 10 cm) two wheels, one which a commercial product industry. proposed advanced based on products’ two-dimensional axisymmetry, includes cooling after vulcanization, during crosslinking reactions...

The drying behaviour of dry-fermented sausage Petrovsk? klob?sa ripened in traditional and industrial conditions has been studied. Obtained results indicated that sausages dried room (batch I) had higher weight loss lower water activity (aw) values than counterparts from traditional/artisanal production T). Difference intensity between internal external fractions was much more marked for batch I. experimental data content klob?sa, respective conditions, were compared with predicted by seven...

Natural rubber composites were reinforced by the co-fillers 'hydrochar' (HC), obtained hydrothermal carbonization of hardwood sawdust and commercial carbon black (CB). The content combined fillers was kept constant while their ratio varied. aim to test suitability HC as a partial filler in natural rubber. Due its larger particle size hence smaller specific surface area, large amounts reduced crosslinking density composites. On other hand, due unsaturated organic character, found display...

Abstract In the age of rapid degradation environment, use natural coagulants for water and wastewater treatment represents a promising idea which is in line with global sustainable initiatives. Since these are organic nature have complex composition, it important to separate components show coagulation activity from those do not show. this work, ultrafiltration membranes MW cut off 10,000 Da 30,000 were used fractionation coagulant extract obtained common bean seed. Coagulation efficiency...

Cross-flow microfiltration is a broadly accepted technique for separation of microbial biomass after the cultivation process. However, membrane fouling emerges as main problem affecting permeate flux decline and process efficiency. Hydrodynamic methods, such turbulence promoters air sparging, were tested to improve during microfiltration. In this study, non-recurrent feed-forward artificial neural network (ANN) with one hidden layer was examined tool modeling using Bacillus velezensis broth...

The objective of this study was to investigate the effects process variables (transmembrane pressure, flow rate, and concentration) on permeate flux during microfiltration model starch suspensions, determine conditions under which use Kenics statics mixer as a turbulence promoter is justified. A response surface methodology used examine influence selected operating suspension using single channel ceramic membrane with 200 nm pore size. experimental results clearly show that improved...

Abstract Although extensive research has been carried out on the understanding of complex vulcanization process, influence reversion through exposure time and temperature degree remains unclear. Therefore, main aim this study was a novel optimization approach that can help industrial practitioners to select optimal operating parameters, time, molding temperature, achieve desired selected product. Spheres four different diameters (2.5, 5, 10, 20 cm) were as test geometry for simulation rubber...

In order to improve physical and chemical properties of dough produced from wheat flour suboptimal quality (protein content 10.7% dry basis, energy 4.0 cm2), optimal doses ascorbic citric acid were evaluated using a response surface methodology desirability function. The paper brings the analysis main effects as well their interactions. effect organic acids was evident in relation pH lowering decrease free thiol groups, which consequently changed (increased energy, extensibility resistance)....

Determination of rubber rheological properties is indispensable in order to conduct efficient vulcanization process industry. The main goal this study was development an advanced artificial neural network (ANN) for quick and accurate data prediction commercially available gum tire production. ANN developed by using the platform large-scale machine learning TensorFlow with Sequential Keras-Dense layer model, a Python framework. trained validated on previously determined experimental torque...

This work investigates influence of different process parameters such as transmembrane pressure, flow rate and concentration wheat starch suspension on the average permeate flux decline. Used membrane in all experiments was 19 channels ceramic with 0.2 ?m pore size. Experimental results were analyzed using response surface methodology. It is observed that significant enhancement 200% achieved by increase while affected range 40-100%. Permeate decline almost independent but rate, well...

Abstract Flux declines versus time during cross‐flow microfiltration of wheat starch suspensions were modeled using fuzzy logic systems under different conditions transmembrane pressure, flow rate, and suspension concentration. Fuzzy modeling is one the most efficient methods for empirical modeling, especially non‐linear systems, does not require any prior knowledge about process. The influence process parameters on dynamic behavior permeate flux was determined by comparing decline volume...

Cross-flow microfiltration using ceramic tubular membrane was applied for treatment of steepwater from corn starch industry. Experiments are conducted according to the faced centered central composite design at three different transmembrane pressures (1, 2 and 3 bar) cross-flow velocities (100, 150 200 L/h) with without usage Kenics static mixer. For examination influence selected operating conditions which mixer is justified, a response surface methodology desirability function approach...

The aim of this study was the modeling and optimization turbulence promoter-assisted starch suspension microfiltration process using artificial neural networks. main to analyze influence parameters (transmembrane pressure, flow rate, concentration) on permeate flux (with without twisted tape) energy consumption in order find optimal combination needed for efficient use promoter. obtained results showed a very good agreement between network predictions experimental data. Permeate mostly...