scholarly journals Inactivation of vegetative cells, germinated spores, and dormant spores of Bacillus atrophaeus by pulsed electric field with fixed energy input

2022 ◽  
Author(s):  
Wen Jie Wu ◽  
Jinhui Chang
Keyword(s):  
Electric Field ◽  
Energy Input ◽  
Pulsed Electric Field ◽  
Bacillus Atrophaeus ◽  
Vegetative Cells ◽  
Fixed Energy

scholarly journals Perspectives of pulsed electric field application for larvae biomass drying

2020 ◽  
Vol 10 (4) ◽  
pp. 12-21
Author(s):  
I.A. Shorstky ◽  
◽  
O. Parniakov ◽  
S. Smetana ◽  
◽  
...  
Keyword(s):  
Electric Field ◽  
Specific Energy ◽  
Energy Input ◽  
Pulsed Electric Field ◽  
Field Application ◽  
Specific Energy Input ◽  
Drying Time ◽  
Drying Temperature ◽  
Electric Filed ◽  
Pulsed Electric Field Treatment

The perspectives of pulsed electric field (PEF) application for larvae biomass drying are considered. Drying process optimization was carried out using two-way analysis of variance in the range of applied specific energy input of from 0 up to 20 kJ/kg and drying temperature of from 50 up to 90°С. It was found out that application of pulsed electric field treatment allowed marked decreasing of larvae biomass drying time from 183 to 124 minutes for the samples treated with electric filed intensity of E = 2 kV/cm and specific energy of 20 kJ/kg. Based on the obtained experimental data the optimal drying and PEF treatment parameters for larvae biomass were determined for the ranges of drying temperature – 82–85℃ and specific energy input – 4.1–6.6 kJ/kg.

scholarly journals Pulsed-Electric Field Treatment Enhances the Bactericidal Action of Nisin against Bacillus cereus

2000 ◽  
Vol 66 (1) ◽  
pp. 428-430 ◽  
Author(s):  
Irene E. Pol ◽  
Hennie C. Mastwijk ◽  
Paul V. Bartels ◽  
Eddy J. Smid
Keyword(s):  
Electric Field ◽  
Bacillus Cereus ◽  
Pulsed Electric Field ◽  
Low Doses ◽  
Bactericidal Action ◽  
Vegetative Cells ◽  
Pulsed Electric Field Treatment ◽  
Electric Field Treatment

ABSTRACT Vegetative cells of Bacillus cereus were subjected to low doses of nisin (0.06 μg/ml) and mild pulsed-electric field treatment (16.7 kV/cm, 50 pulses each of 2-μs duration). Combining both treatments resulted in a reduction of 1.8 log units more than the sum of the reductions obtained with the single treatments, indicating synergy.

scholarly journals Sensitivities of Germinating Spores and Carvacrol-Adapted Vegetative Cells and Spores of Bacillus cereus to Nisin and Pulsed-Electric-Field Treatment

2001 ◽  
Vol 67 (4) ◽  
pp. 1693-1699 ◽  
Author(s):  
Irene E. Pol ◽  
Willy G. C. van Arendonk ◽  
Hennie C. Mastwijk ◽  
Judit Krommer ◽  
Eddy J. Smid ◽  
...  
Keyword(s):  
Electric Field ◽  
Bacillus Cereus ◽  
Treatment Resistance ◽  
Pulsed Electric Field ◽  
The Other ◽  
Heat Sensitivity ◽  
Vegetative Cells ◽  
Germination Process ◽  
Pulsed Electric Field Treatment ◽  
Electric Field Treatment

ABSTRACT Treatment of Bacillus cereus spores with nisin and/or pulsed-electric-field (PEF) treatment did not lead to direct inactivation of the spores or increased heat sensitivity as a result of sublethal damage. In contrast, germinating spores were found to be sensitive to PEF treatment. Nisin treatment was more efficient than PEF treatment for inactivating germinating spores. PEF resistance was lost after 50 min of germination, and not all germinated spores could be inactivated. Nisin, however, was able to inactivate the germinating spores to the same extent as heat treatment. Resistance to nisin was lost immediately when the germination process started. A decrease in the membrane fluidity of vegetative cells caused by incubation in the presence of carvacrol resulted in a dramatic increase in the sensitivity to nisin. On the other hand, inactivation by PEF treatment or by a combination of nisin and PEF treatments did not change after adaptation to carvacrol. Spores grown in the presence of carvacrol were not susceptible to nisin and/or PEF treatment in any way.

Influence of Pulse Width on Polyphenol Extraction from Agricultural Products by Pulsed Electric Field

2013 ◽  
Vol 133 (2) ◽  
pp. 32-37 ◽  
Author(s):  
Akira Nakagawa ◽  
Hitoshi Hatayama ◽  
Koichi Takaki ◽  
Shoji Koide ◽  
Yukio Kawamura
Keyword(s):  
Electric Field ◽  
Pulse Width ◽  
Pulsed Electric Field ◽  
Agricultural Products ◽  
Polyphenol Extraction

Development of PEF extraction technology by Maguin

2015 ◽  
pp. 758-760
Author(s):  
Romain Delecourt ◽  
Loïc Marsal
Keyword(s):  
Sugar Beet ◽  
Electric Field ◽  
Pulsed Electric Field ◽  
Extraction Technology ◽  
Application System ◽  
Wide Range ◽  
Type Machine

Maguin (France) is still active in the application of pulsed electric field (PEF) technology. After having carried out successful tests on a 10 t/h pilot screw-type machine on sugar beet cossettes, a new application system based on a roller technology has been developed. This technology allows a wide range of application due to its flexibility with flowrates and materials. A variety of process schemes are proposed to ensure the best performance of the PEF technology.

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