Publications by authors named "S Toepfl"

The aim of this work was to investigate the potential of PEF technology for green extraction of microalgal pigments and lipids from fresh Chlorella sorokiniana suspensions. Efficiencies of PEF treatment and different solvent systems application to C.sorokiniana were compared to efficiencies of untreated biomass extraction.

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Pulsed electric field (PEF) treatment consists of exposing food to electrical fields between electrodes within a treatment chamber, which can improve the preservation of fresh-like products such as milk. Although several studies support the use of PEF technology to process milk at low temperature, these studies reported microbial reductions of around 3 log cycles and also indicated a limited impact of PEF on some endogenous and microbial enzymes. This scenario indicates that increasing the impact of PEF on both enzymes and microorganisms remains a major challenge for this technology in milk processing.

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The addition of different protein sources (soy, bean, lentil, broad bean, and ) on nutritional, physicochemical and sensory properties of chicken rotti was evaluated. Significant changes were observed in physicochemical composition, textural properties and amino acid content of chicken rotti after adding the proteins from different sources, thus influencing the sensory acceptance and preference. and rotti presented a slight increase of pH and seaweed caused a decrease in some colour parameters.

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Effect of pulsed electric field (PEF) strength, pulse duration and temperature used during PEF assisted blanching pretreatment on energy input, cell disintegration index and drying time of apple slices was studied. A central composite rotatable design was used for designing the experiment and to visualize the effect of variables on responses. The level of variables used in the design varied from 1 to 2 kV cm, 25 to 75, and 60 to 80 °C for electric field strength, number of pulses and temperature of water during PEF assisted blanching pretreatment, respectively.

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Pulsed electric fields (PEF), high pressure processing (HPP) and conventional method of heating (90 °C, 60s) were evaluated as blanching methods for fresh cut apples. The settings employed for PEF and HPP were 1.5 kV/cm, 100 pulses, 4 Hz and 600 MPa for 2 min respectively.

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