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master's thesis
Utjecaj ambalažnog materijala i sastava plinova u modificiranoj atmosferi na upakirani svježi list koprive
Zagreb: University of Zagreb, Faculty of Food Technology and Biotechnology, 2023. urn:nbn:hr:159:710481
Pišonić, Petra
University of Zagreb
Faculty of Food Technology and Biotechnology
Department of Food Engineering
Laboratory for Food Packaging

Institutional repository: Repository of the Faculty of Food Technology and Biotechnology

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Pišonić, P. (2023). Utjecaj ambalažnog materijala i sastava plinova u modificiranoj atmosferi na upakirani svježi list koprive (Master's thesis). Zagreb: University of Zagreb, Faculty of Food Technology and Biotechnology. Retrieved from https://urn.nsk.hr/urn:nbn:hr:159:710481

Pišonić, Petra. "Utjecaj ambalažnog materijala i sastava plinova u modificiranoj atmosferi na upakirani svježi list koprive." Master's thesis, University of Zagreb, Faculty of Food Technology and Biotechnology, 2023. https://urn.nsk.hr/urn:nbn:hr:159:710481

Pišonić, Petra. "Utjecaj ambalažnog materijala i sastava plinova u modificiranoj atmosferi na upakirani svježi list koprive." Master's thesis, University of Zagreb, Faculty of Food Technology and Biotechnology, 2023. https://urn.nsk.hr/urn:nbn:hr:159:710481

Pišonić, P. (2023). 'Utjecaj ambalažnog materijala i sastava plinova u modificiranoj atmosferi na upakirani svježi list koprive', Master's thesis, University of Zagreb, Faculty of Food Technology and Biotechnology, accessed 17 November 2024, https://urn.nsk.hr/urn:nbn:hr:159:710481

Pišonić P. Utjecaj ambalažnog materijala i sastava plinova u modificiranoj atmosferi na upakirani svježi list koprive [Master's thesis]. Zagreb: University of Zagreb, Faculty of Food Technology and Biotechnology; 2023 [cited 2024 November 17] Available at: https://urn.nsk.hr/urn:nbn:hr:159:710481

P. Pišonić, "Utjecaj ambalažnog materijala i sastava plinova u modificiranoj atmosferi na upakirani svježi list koprive", Master's thesis, University of Zagreb, Faculty of Food Technology and Biotechnology, Zagreb, 2023. Available at: https://urn.nsk.hr/urn:nbn:hr:159:710481

Metadata
TitleUtjecaj ambalažnog materijala i sastava plinova u modificiranoj atmosferi na upakirani svježi list koprive
Title (english)Influence of packaging material and gas composition in modified atmosphere on packaged fresh nettle leaf
AuthorPetra Pišonić
MentorMia Kurek (mentor)
Committee memberMario Ščetar (predsjednik povjerenstva)
Committee memberMaja Repajić (član povjerenstva)
Committee memberIvona Elez Garofulić (član povjerenstva)
GranterUniversity of Zagreb
Faculty of Food Technology and Biotechnology
(Department of Food Engineering)
(Laboratory for Food Packaging)
Zagreb
Defense date and country2023-09-26, Croatia
Scientific / art field,
discipline and subdiscipline		BIOTECHNICAL SCIENCES
Food Technology
Abstract
Kopriva je biljka visoke stope respiracije te se od davnina koristi zbog svojih korisnih učinaka na zdravlje. U ovome radu promatran je utjecaj polimernih materijala, kao i plinskih sastava na stvaranje modificirane atmosfere i skladištenje koprive tijekom 9 dana. Korištena su četiri materijala, tri sintetska polimera: polietilen niske gustoće (PE-LD), biaksijalno orijentirani polipropilen (BOPP) i poliamid/polietilen (PA/PE) te jedan biorazgradivi polimer - polimliječna kiselina (PLA). Zbog visoke propusnosti na vodenu paru (8,59·10⁻¹² g m/s Pa) i plinove (PO₂ : 0,11 cm³ /m d bar; PCO₂ : 0,153 cm³ /m d bar), PLA se pokazao prikladan za kratkotrajno skladištenje svježih listova koprive, dok je PA/PE zbog vrlo niske propusnosti vodene pare i plinova neprikladan za pakiranje dišućih proizvoda, jer dolazi do naglog porasta CO₂ u pakovini. U uzorcima upakiranih u PE-LD i BOPP, ravnoteža plinova u pakovini postignuta je pri puno nižim udjelima kisika u usporedbi s kontrolnim uzorcima te je postignuta i bolja opća kvaliteta proizvoda.
Abstract (english)
Nettle is a plant with a high rate of respiration and has been used since ancient times for its beneficial effects on health. In this work, the influence of polymer materials, as well as gas compositions, on the formation of a modified atmosphere and the storage of fresh nettle leaves for 9 days was observed. Four packaging materials were used, three synthetic polymers: low-density polyethylene (PE-LD), biaxially oriented polypropylene (BOPP) and polyamide/polyethylene (PA/PE) and one biodegradable material - polylactic acid (PLA). Due to high permeability to water vapor (8.59·10⁻¹²g m/s Pa) and gases (PO₂ : 0.11 cm³ /m d bar; PCO₂ : 0.153 cm³ /m d bar) PLA proved to be suitable for short-term storage of fresh nettle leaves, while PA/PE, due to its very low water vapor and gas permeability, was characterised as unsuitable for packaging breathable products, as there was a sudden increase of CO₂ in the packaging. In the samples packaged in PE-LD and BOPP, the gas balance in the package was achieved at much lower proportions of oxygen compared to the control samples, and a better general quality of the product was also achieved.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:159:710481
Study programmeTitle: Food Safety Management
Study programme type: university
Study level: graduate
Academic / professional title: magistar/magistra inženjer/inženjerka upravljanja sigurnošću hrane (magistar/magistra inženjer/inženjerka upravljanja sigurnošću hrane)
Type of resourceText
File originBorn digital
Access conditionsOpen access
Terms of useLicence Attribution-NoDerivatives 4.0 International (CC BY-ND 4.0) icon
Created on2024-07-04 09:10:17