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dc.contributor.advisorKorel, Figenen_US
dc.contributor.authorAkgün, Begüm-
dc.identifier.citationAkgün, B. (2017). Development of a novel active packaging system based on layer-sy layer deposition of natural antioxidants and antimicrobials to extend food products' shelf life. Unpublished master's thesis, İzmir Institute of Technology, İzmir, Turkeyen_US
dc.descriptionThesis (Master)--Izmir Institute of Technology, Food Engineering, Izmir, 2017en_US
dc.descriptionIncludes bibliographical references (leaves: 69-78)en_US
dc.descriptionText in English; Abstract: Turkish and Englishen_US
dc.description.abstractIn recent years, Layer-by-Layer (LbL) assembly of thin films has been extensively investigated for many purposes, particularly for its functionality and simplicity of fabrication. Through LbL assembly; antioxidant agents have beenincorporated into active packaging systems in different forms, mainly including sachets, physical adsorption on packaging material surface, multilayer films which contact with food packaging surface. In previous studies, active packaging systen associated with LbL depositions were investigated, but no detailed investigation has been found about the application of controlled releasing-active packaging system on fresh-cut fruits. In this study, 20 bilayers of chitosan and alginate; respectively; were coated on amorphous polyethylene terephthalate (A-PET) sheets by dipping method. The LbL treated PET films were used for active packaging of fresh-cut peaches. Total soluble solids content and titrable acidity demonstrated that LbL active coating did not interfere with the natural postharvest behaviour. A lower weight loss was observed for LbL coated peach saples, suggesting that the presence of layer structure on PET strips could act as a barrier against fruit water loos. After 7 days of storage, the LbL treated samples have shown the best preservation of carotenoids, the lower PPO activity and higher phenolic index. Microbiological analysis has shown that all the microbiological analysis has that all the microorganism types which were invetigated were affected by the actice packaging system.Sensory results were really encouraging, as well. As a conclusion, LbL coating has been proved for being a useful technique to produce controlled-release active packaging systems on fresh-cut fruits.en_US
dc.format.extentxii, 79 leavesen_US
dc.publisherIzmir Institute of Technologyen_US
dc.subjectThin filmsen_US
dc.subjectActive packagingen_US
dc.subjectLayer by layer assemblyen_US
dc.subjectAntimicrobial activityen_US
dc.subjectShelf lifeen_US
dc.titleDevelopment of a novel active packaging system based on layer-sy layer deposition of natural antioxidants and antimicrobials to extend food products' shelf lifeen_US
dc.title.alternativeGıda ürünlerinin raf ömrünü uzatmak için doğal antioksidanların ve antimikrobiyellerin katmanlı depozisyonuna dayalı yeni aktif ambalajlama sisteminin geliştirilmesien_US
dc.typeMaster Thesisen_US
dc.institutionauthorAkgün, Begüm-
dc.departmentThesis (Master)--İzmir Institute of Technology, Food Engineeringen_US
item.fulltextWith Fulltext-
item.openairetypeMaster Thesis-
Appears in Collections:Master Degree / Yüksek Lisans Tezleri
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