Institutul de Fizică Aplicată

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Author: search.filters.author.Bologa, Mircea

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    SEDIMENTAREA PROTEINELOR SERICE ÎN PUNCTUL IZOELECTRIC LA ELECTROACTIVAREA ZERULUI
    (CEP USM, 2024) Paladii, Irina; Vrabie, Elvira; Bologa, Mircea; Vrabie, Valeria; Stepurina, Tatiana; Policarpov, Albert; Sprincean, Cătălina
    The electroactivation of whey generates the recovery of whey proteins into mineral protein concentrates, accompanied by a series of inter- and intramolecular changes through the activation of all the substances in the solid content, especially the protein content, which occur through the action of a series of protein aggregation mechanisms, in according to the classic chemical and biochemical properties of serum proteins. The variation of active acidity and redox potential in the cathode cell is not homogeneous, it expands during processing and ensures the sedimentation of serum proteins from whey at their isoelectric point, it demonstrates the influence of solid and protein content on the electroactivation of different types of whey and indicates the transition of aquacomplexes in hydrocomplexes, being more evident when processing whey with a low protein content.
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    OPTIMIZATION OF AN EHD PUMP CHARACTERISTICS
    (CEP USM, 2024) Motorin, Oleg; Bologa, Mircea; Podlesny, Igor
    Electrohydrodynamic pumps generate flow in dielectric liquids. Two injection type electrohydodynamic pumps with blade-blade with insulation coating type electrodes and grid-grid type electrodes made of bare wires and wires covered with perforated insulation have been studied. There was a movable flow-limiting partition in the interelectrode space of the second pump. The current-voltage and pressure-flow rate characteristics of the pumps are given when using pure transformer oil, transformer oil-butanol mixtures ans polyethylsiloxane liquid. The optimal interelectrode gap distance, conductivity of the medium and position of the flow-limiting partition has been established, which ensures maximum pressure (in transformer oil, the pressure was 1.8 times higher than in polyethylsiloxane liquid).