master's thesis
Influence of packaging materials and storage temperature on the polyphenolic compound and organic acid content in fruit juices

Nikolina Jug (2012)
Josip Juraj Strossmayer University of Osijek
FACULTY OF FOOD TECHNOLOGY
Sub-department of Applied Chemistry and instrumental Methods
Metadata
TitleUtjecaj vrste pakiranja i temperature skladištenja na sadržaj polifenolnih spojeva i organskih kiselina u voćnim sokovima
AuthorNikolina Jug
Mentor(s)Lidija Jakobek (thesis advisor)
Abstract
U ovom radu ispitivan je utjecaj vrste pakiranja (staklene ili višeslojne ambalaže) i temperature skladištenja (sobna temperatura ili temperatura hladnjaka) na određene pokazatelje kvalitete voćnih sokova. U periodu od 50 dana kvaliteta voćnih sokova je praćena određivanjem količine ukupnih antocijanina, ukupnih polifenola, jabučne, limunske, vinske i askorbinske kiseline. Rezultati su pokazali da je tijekom skladištenja došlo do promjene količine antocijanina u voćnim sokovima, a pad je bio izraženiji kod sokova skladištenih na sobnoj temperaturi. Vrsta pakiranja vjerojatno nije imala veći utjecaj na očuvanje antocijanina. Sadržaj ukupnih polifenola, jabučne i limunske kiseline nije se bitno promijenio. Došlo je i do promjene količine askorbinske kiseline (vitamina C). Askorbinska kiselina bolje je očuvana u sokovima skladištenim u staklenu ambalažu u usporedbi s višeslojnim pakiranjem dok temperatura nije imala veći utjecaj na očuvanje askorbinske kiseline. Rezultati ovog rada pokazuju da se kvaliteta voćnih sokova s obzirom na količinu polifenolnih spojeva, vitamina C te ostalih ispitivanih organskih kiselina može bolje očuvati pakiranjem voćnih sokova u staklenu ambalažu i skladištenjem na nižim temperaturama (temperature hladnjaka) prije konzumacije.
Keywordsfruit juice packing storage multilayer material polyphenolic compounds anthocyanins organic acids ascorbic acid
Parallel title (English)Influence of packaging materials and storage temperature on the polyphenolic compound and organic acid content in fruit juices
Committee MembersMarijan Šeruga
Lidija Jakobek
Ivica Strelec
Mirna Habuda-Stanić
GranterJosip Juraj Strossmayer University of Osijek
FACULTY OF FOOD TECHNOLOGY
Lower level organizational unitsSub-department of Applied Chemistry and instrumental Methods
PlaceOsijek
StateCroatia
Scientific field, discipline, subdisciplineBIOTECHNICAL SCIENCES
Food Technology
Engineering
Study programme typeuniversity
Study levelgraduate
Study programmeProcess Engineering
Academic title abbreviationmag. ing. proc.
Genremaster's thesis
Language Croatian
Defense date2012-02-14
Parallel abstract (English)
In this work, the influence of packaging material (glass or multilayer package) and storage temperature (room temperature or refrigerator temperature) on certain quality indicators of fruit juices was studied. The fruit juice quality was monitored during the period of 50 days by determining the amount of total anthocyanins, total polyphenols, malic, citric, tartaric and ascorbic acid. Results indicated the decrease of the anthocyanin content in fruit juices during storage, and the decrease was higher in juices stored at the room temperature. The packaging material probably didn’t have a big influence on the anthocyanin preservation. The amount of total polyphenols, malic and citric acid didn’t change significantly. The change in the ascorbic acid content (vitamin C) was observed. Ascorbic acid was better preserved in juices stored in glass bottles compared with those stored in the multilayer package. The storage temperature did not show greater influence on the ascorbic acid preservation. The results of this study showed that the fruit juice quality, based on the amount of polyphenolic compounds, vitamin C and other organic acids tested, can be better preserved by packaging in the glass package and storing at lower temperature (refrigerator temperature) before consumption.
Parallel keywords (Croatian)voćni sokovi skladištenje pakiranje polifenoli antocijanini organske kiseline askorbinska kiselina
Resource typetext
Access conditionAccess restricted to students and staff of home institution
Terms of usehttp://rightsstatements.org/vocab/InC/1.0/
URN:NBNhttps://urn.nsk.hr/urn:nbn:hr:109:219963
CommitterSanda Hasenay