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Progress in Agricultural Engineering Sciences
Authors: Karina Ilona Hidas, Csaba Németh, Lien Phuong Le Nguyen, Anna Visy, Adrienn Tóth, László Friedrich, and Ildikó Csilla Nyulas-Zeke

during the freezing process and it results in the concentration of components, that leads to the accumulation of low-density lipoproteins in plasma ( Zhao et al., 2021 ). Au and his co-authors examined the effect of freezing at –20 °C and frozen storage

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During our research concentrations of quality wines were investigated by membrane separation on nanofiltration and reverse osmosis membranes. The practicability of the process was examined by experimental design in our laboratory experiments. The effects of the operating parameters on the efficiency of the methods were analyzed, from which the conclusion was drawn that the sugar content of the wines affects the filtrate capacity considerably. This phenomenon was attributed to the resistance appearing during the process. This resistance is the osmotic pressure which is faced with the driving force. By the mathematical modeling of the process - building up experimental and empirical relations - the answer for the practical implementing was searched for. Our concrete model concentrates on the connection between the changing of the osmotic pressure and the retained molecules by the membrane. Monitoring of this connection is a primary criterion when planning the optimal development of the process.

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Concentrations of potentially toxic elements were determined in the soil solution of two soils (acidic sandy and slightly acidic clay loam) treated with phosphate rocks having high Cd content in a pot experiment. Relative concentrations characterizing the mobility of metals (expressed as soil solution concentrations in percentage of their “total” amounts in the phosphate rock-treated soil) decreased with increasing phosphate rock rates in the sandy soil. Mn@Sr>Cd@Co were the most, while Pb and Cr the least mobile elements. The relative concentrations in the clay loam soil were much lower than in the sandy soil and they practically remained constant with increasing phosphate rock rates. It was concluded that in the experimental time frame the environmental risk did not increase with the increase of phosphate rock rate. 

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Progress in Agricultural Engineering Sciences
Authors: Szilvia Bánvölgyi, Eszter Dusza, Fiina K. Namukwambi, István Kiss, Éva Stefanovits-Bányai, and Gyula Vatai

) describe that different extraction conditions such as the type and concentration of the solvent, pH, temperature and time, pressure, and the size of particles may significantly influence the quantitative parameters (total phenolic compounds) and qualitative

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. (2001) Nanofiltration used desalination and-concentration in dye production, Journal of Membrane Science , 97–100. Semiat, R., Iris, S., David, H. (2001) Technique for evaluating silica scaling and its

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. By then, concentrations of the specific betalain compounds were calculated as follows: Betalain = A · M W · D F ·   1000 ϵ · L ( mg   L − 1 ) , where A is the absorbance; MW is the molecular weight; DF is the dilution factor; ϵ is the molar

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includes a range of constituents such as biodegradable and non-biodegradable organics, inorganics and inhibitory substances. Therefore, the industrial effluents may be nutrient deficient and contain high concentrations of heavy metals ( Mhlanga & Brouckaert

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Progress in Agricultural Engineering Sciences
Authors: Khabat Noori Hussein, Tímea Molnár, Richard Pinter, Adrienn Toth, Emna Ayari, Laszlo Friedrich, Istvan Dalmadi, and Gabriella Kiskó

organoleptic properties of different foods, and change their taste, smell, and aroma. For these reasons, it would be important to determine the minimum concentration of various antimicrobial agents that are sufficiently effective against various pathogens but

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plate assay ( Mouwakeh et al., 2019 ). For this purpose, Minimal Media M9 was used to assess the biofilm formation of Listeria strains under different sodium chloride (NaCl) concentrations (0.05, 5, 10, and 15%) and pH values of 4, 5, and 6

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Progress in Agricultural Engineering Sciences
Authors: Mai Sao Dam, Lien Le Phuong Nguyen, Tamás Zsom, Géza Hitka, Ildikó Csilla Zeke, and László Friedrich

) with different number of perforations (3, 4, and 6) similar to Dawange et al. 2016 . A packaging machine (Multivac, Wolfertschwenden, Germany) was used to seal the packages keeping 6–7% oxygen as the initial oxygen concentration in the packs. Samples

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