Cereal brans are by-products of the milling cereal grains, which mainly used as low value ingredients in animal feed. Wheat and oat bran is a rich source bioactives phytochemicals, especially phenolic compounds. Within this study, application ultrasound (US) technology to assist extraction phenolics from wheat was investigated (20-45 kHz). Peleg's mathematical model study kinetics ultrasound-assisted (UAE) subsequent stirring total compounds (TPC). The surface morphology after studied using...

Chamomile is one of the most consumed medicinal plants worldwide. Various chamomile preparations are widely used in various branches both traditional and modern pharmacy. However, order to obtain an extract with a high content desired components, it necessary optimize key extraction parameters. In present study, optimization process parameters was performed using artificial neural networks (ANN) model solid-to-solvent ratio, microwave power time as inputs, while outputs were yield total...

Abstract The main purposes of this work are successful modeling twin‐screw extrusion process using predictive models, investigating the effect parameters such as screw speed, feed rate, and moisture content on product responses finally optimizing regarding betaine in extruded energy consumption. second order polynomial approximation models artificial neural network were developed to predict content, showing high accuracy prediction experimental results. This study introduces multiobjective...

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 The influences of alcohol adding and three different gas spargers (single orifice, perforated plate, sinter plate) on the holdup in an external‐loop airlift reactor were studied. experimental results show that can be increased by mutual influence both sparger type. presence small amounts normal aliphatic alcohols caused increase compared to air‐water system, due their coalescence‐inhibiting nature. plate was most efficient sparger, followed single orifice. A proposed artificial...

The influence of different extrusion parameters, including screw speed (250-750 rpm), feed rate (15-25 kg/h) and moisture content (15-25%), on the textural color properties spelt wholegrain snack products produced a co-rotating twin-screw extruder with added betaine was investigated. In order to determine relative input variables in artificial neural network (ANN) model, Yoon's interpretation method used, it concluded that has greatest L* values, while a* b* values. softest samples were...

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...

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...

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...

The objective of this work was to investigate the influence normal aliphatic alcohols (from methanol n-octanol) and gas sparger type (single orifice, perforated plate, sinter plate) on hydrodynamics a draft tube airlift reactor. results showed that presence led both an increase in holdup reduction downcomer liquid velocity, comparison values obtained water. also changed hydrodynamic behavior—the increased with dispersion effectiveness, from single orifice while effect velocity conjunction...

In this work, the influence of addition normal aliphatic alcohols (from methanol to n-octanol) and gas sparger type (single orifice, perforated plate, sinter plate) on volumetric mass transfer coefficient in a draft tube airlift reactor was investigated. The results showed that from n-hexanol led an increase coefficient, comparison water, while n-heptanol n-octanol had opposite effect. dominant at low superficial velocities. At higher velocities, liquid-phaseproperties type, being effect...

Clay roofing tiles fired at five different temperatures (900, 920, 960, 1,000, and 1,020°C) were subjected to the investigations of textural characteristics frost resistance prediction. The closed container hydraulic pressure mechanisms proved be dominant lower firing (900 920°C), whereas micro-ice-lens formation mechanism have significant role higher (960 1,000°C). highest is noticed for samples 1,020°C where action are balanced because porous structure that compensates local stresses...

The objective of this study was to investigate the hydrodynamics an external-loop airlift membrane reactor (ELAMR). ELAMR operated in two modes: without (mode A) and with bubbles downcomer B), depending on liquid level gas separator. influence distributor's geometry various alcohol solutions studied. Results for holdup velocity are commented respect same but (ELAR). Due presence downcomer, acting as local hydrodynamic resistance, riser increases maximally by 16%, while decreases up 50%....

The objective of this research was to determine chemical composition and evaluate the antifungal activity essential oil Mentha piperita. By application GC/MS analysis mint oil, 27 components were identified. major menthol (39.9 %), menton (23.51 menthyl acetate (7.29 1.8-cineol (5.96 isomenton (5.24 isomenthol (3.17 trans-caryophyllene (2.88 limonene (2.14 pulegon (1.38 beta-pinene (1.14 %) piperiton (1.03 %). quantitative structure? retention relationship (QSRR) employed predict time (RT)...

The main hydrodynamic characteristics of a novel-constructed, self-agitated draft tube airlift reactor (DT-ALR) were investigated. Ten impellers, driven only by the means gas throughput and induced liquid circulation, inserted in tube. insertion impellers caused bubble breakup reduction both mean size coalescence, even under conditions high throughputs. Although energy losses, resistance to flow was relatively lower due their rotation, unlike internals used other research reported...

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...