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- ItemOptimizing the application of plasma functionalised water (PFW) for microbial safety in fresh-cut endive processing(New York, NY [u.a.] : Elsevier Science, 2021) Schnabel, Uta; Balazinski, Martina; Wagner, Robert; Stachowiak, Jörg; Boehm, Daniela; Andrasch, Mathias; Bourke, Paula; Ehlbeck, JörgThe microbiological profiles and responses of native microflora of endive were investigated using a model process line, to establish where a defined PFW should be optimally applied to retain or improve produce microbiological quality. The PFW processes were compared with tap water and ClO2. The antimicrobial efficacy of PFW was quantified by determining the reduction in microbial load, the microbial viability and vitality. Depending on the stage of application of PFW, up to 5 log10-cycles reduction was achieved, accompanied by a reduction of metabolic activity, but not necessarily with a decrease in metabolic vitality. Multiple application (3-step-PFW-application) was more effective than single application (1-step-PFW-application) and PFW showed stronger antimicrobial effect in pre-cleaned endive. High concentrations of nitrite (315 mg l−1) and nitrate (472 mg l−1) in PFW were the main factors for the antimicrobial efficacy of PFW against bacteria. Furthermore, H2O2 and an acidic pH supported the mechanism of action against the endive microflora. These results identify the pathway to scale up successful industrial application of PFW targeting microbiological quality and safety of fresh leafy products.Industrial relevance The safety, quality and shelf life of freshly cut vegetables, e.g. lettuce, are strongly influenced by the microbial load. In addition, the hygienic design of production line, and a good handling/ production practice are indispensable. This study shows that the application of PFW, as a promising non-thermal sanitation technology, enables the inactivation of native microbial contamination on fresh-cut endive depending on the process stage of application. It further describes the impact of PFW on the metabolic activity and metabolic vitality of the lettuce-associated microflora. For higher acceptance, the mechanism of action of PFW was assumed based on previous chemical analyses and compared to the industrial standard of ClO2. The results contribute to the understanding and product-specificity of PFW-induced effects on safety, quality and shelf life of fresh cut lettuce and could be a basis for a possible industrial implementation and complement of common technologies.
- ItemLaserdiagnostische und plasmatechnologische Grundlagen zur Verminderung von Emissionen und Kraftstoffverbrauch bei DI-Verbrennungsmotoren : Thema: Diagnostik des Schadstoffabbaus in Mikrowellenentladungen ; Forschungsbericht/Abschlußbericht(Greifswald : Leibniz-Institut für Plasmaforschung und Technologie, 2001) Ehlbeck, Jörg; Pasch, Ekkehard[no abstract available]
- ItemEntwicklung eines Plasma-Emissionsdetektors für die Bestimmung von Schwermetall-Spezies für Anwendungen in der Umweltanalytik, Lebensmittel-Qualitätssicherung und Umweltmedizin : Schlussbericht ; (Bewilligungszeitraum: 01.02.2009 - 31.07.2012)(Greifswald : Leibniz-Institut für Plasmaforschung und Technologie, 2012) Wolfgang Buscher, Wolfgang Buscher; Ehlbeck, Jörg; Piechotta, Christian[no abstract available]
- ItemAnwendung von Plasmaverfahren zur schonenden Haltbarmachung am Beispiel leichtverderblicher Lebensmittelprodukte in der Nachernte (Akronym: FriPlas), Teilvorhaben A: Verfahrenskonzeption und technische Umsetzung : Schlussbericht ; Berichtszeitraum: 15.10.2009 - 28.02.2013(Hannover : Technische Informationsbibliothek (TIB), 2013) Schnabel, Uta; Ehlbeck, Jörg[no abstract available]
- ItemModulare Plasmaquellen zur Keimreduzierung : im Verbundprojekt: Plasmagestützte Oberflächenmodifizierung mittels modularer selektiver Plasmaquelle (PLASMOSE) ; Abschlußbericht zum Teilvorhaben(Hannover : Technische Informationsbibliothek (TIB), 2007) Ehlbeck, Jörg; Andrasch, Matthias[no abstract available]
- ItemAbschlussbericht zum Teilvorhaben: Erzeugung und Steuerung von Plasmen zur Beschichtung von Medizinprodukten im Verbundprojekt: Erneuerbare, hygienisch wirksame Nanobeschichtungen auf komplexen Medizinprodukten (NanoGiene) : Laufzeit des Vorhabens: 01.04.2011-31.03.2014 mit sechsmonatiger Verlängerung (30.09.2014)(Hannover : Technische Informationsbibliothek (TIB), 2014) Ehlbeck, Jörg; Rakow, Kristian; Weihe, Thomas; Dittrich, Anne[no abstract available]