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Microbial inactivation and quality impact assessment of red pepper paste treated by high pressure processing

  • The study aimed to investigate inactivation of naturally occurring microorganisms and quality of red pepper paste treated by high pressure processing (HPP). Central composite rotatable design was employed to determine the impacts of pressure (100–600 MPa) and holding time (30–600 s). HPP at 527 MPa for 517 s reduced aerobic mesophilic bacteria count by 4.5 log CFU/g. Yeasts and molds counts were reduced to 1 log CFU/g at 600 MPa for 315 s. Total phenols, carotenoids and antioxidants activity ranged from 0.28 to 0.33 g GAE/100 g, 96.0–98.4 mg βc/100 g and 8.70–8.95 μmol TE/g, respectively. Increase (2.5–6.7%) in these variables was observed with increasing pressure and holding time. Total color difference (ΔE∗) values (0.2–2.8) were within the ranges of ‘imperceptible’ to ‘noticeable’. Experimental results were fitted satisfactorily into quadratic model with higher R2 values (0.8619–0.9863). Optimization process suggested treatment of red pepper paste at 536 MPa for 125 s for maximum desirability (0.622). Validation experiments confirmed comparable percentage of relative errors. Overall, this technique could be considered as an efficient treatment for the inactivation of microorganisms that naturally occur in red pepper paste with minimal changes in its characteristics.

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Metadaten
Author:Henock Woldemichael WoldemariamORCiD, Shimelis Admassu Emire, Paulos Getachew Teshome, Stefan TöpflORCiD, Kemal Aganovic
Title (English):Microbial inactivation and quality impact assessment of red pepper paste treated by high pressure processing
URN:urn:nbn:de:bsz:959-opus-58552
DOI:https://doi.org/10.1016/j.heliyon.2022.e12441
ISSN:2405-8440
Parent Title (English):Heliyon
Document Type:Article
Language:English
Year of Completion:2022
Release Date:2024/04/16
Tag:High pressure processing; Inactivation; Microorganisms; Modeling; Optimization; Red pepper paste
Volume:8
Issue:12
Article Number:e12441
Page Number:10
Faculties:Fakultät AuL
DDC classes:500 Naturwissenschaften und Mathematik / 530 Physik
Review Status:Veröffentlichte Fassung/Verlagsversion
Licence (German):License LogoCreative Commons - CC BY - Namensnennung 4.0 International