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undergraduate thesis
41
14
QUALITY CHARACTERISTICS OF TABLEGRAPE cv. Italia CULTIVATED UNDER PLASTIC COVER IN ORDER TO DELAY HARVEST
Iva Marasović (2015)
University of Zagreb
Faculty of Food Technology and Biotechnology
Department of Food Engineering
Cite this item:
https://urn.nsk.hr/urn:nbn:hr:159:208480
Metadata
Title
Kvaliteta stolnog grožđa cultivar Italia uzgojenog ispod plastičnog pokrova u cilju odgode berbe
Author
Iva Marasović
Mentor(s)
Branka Levaj
(thesis advisor)
Abstract
Provedeno je ispitivanje stolnog grožđa cv. Italia proizvedenog ispod dva tipa plastičnog pokrova koji se koriste za odgađanje berbe. Jedan tip plastičnog pokrova bio je eksperimantalni, a drugi komercijalni koji već ima široku uporabu, a razlikuju se po transmisiji i radiomatrijskom spektru. Glavni cilj rada bilo je usporediti završnih promjene glavnih parametara koji opisuju vanjske i unutarnje karakteristike grožđa. Provedeni testovi su: fizička i mehanička svojstva grozda i bobice, glavni sadržaj soka bobice, ukupan sadržaj fenolnih komponenti u pokožici i pulpi, antioksidativna aktivnost pokožice. Rezultati su pokazali da se fizička i mehanička svojstva grožđa jako malo i zanemarivo razlikuju, dok ukupan sadržaj fenola, ponajviše polifenola i flavonoida je veći kod grožđa uzgojenog ispod eksperimentalnog pokrova zbog njegove transmisije većeg spektra ultraljubičastog zračenja što dovodi do povećanja fenolnog sadržaja.
Keywords
table grape
plastic cover
quality charecteristics
total phenol content
Parallel title (English)
QUALITY CHARACTERISTICS OF TABLEGRAPE cv. Italia CULTIVATED UNDER PLASTIC COVER IN ORDER TO DELAY HARVEST
Granter
University of Zagreb
Faculty of Food Technology and Biotechnology
Lower level organizational units
Department of Food Engineering
Place
Zagreb
State
Croatia
Scientific field, discipline, subdiscipline
BIOTECHNICAL SCIENCES
Interdisciplinary Technical Sciences
Study programme type
university
Study level
undergraduate
Study programme
Food Technology
Academic title abbreviation
univ. bacc. ing. techn. aliment.
Genre
undergraduate thesis
Language
Croatian
Defense date
2015-09-09
Parallel abstract (English)
In this thesis is included examination conducted on table grapes cv. Italia produced under two types of plastic cover used with the purpose to delay harvest day. One plastic cover was experimental, the other was a commercial type presently widely diffused; they differed in transmissivity to the radiometric spectrum. The main aim of work was to compare final changes regarding the main parameters that describe external and internal features of grape quality. Tests that conducted in this work were run to obtain indication about: physical and mechanical traits of cluster and berry; basic berry juice composition; total content of main skin and pulp phenol compounds; skin antioxidant activity. Results indicated that grape physical and mechanical traits and basic berry juice composition changed a very small extent. The parameters most influenced were the berry phenol contents, especially polyphenols and flavonoids: they were higher in grapes produced under the experimental film, likely due to its higher transmissivity to the ultraviolet wavelength range that is known to stimulate phenol biosynthesis.
Parallel keywords (Croatian)
stolno grožđe
plastični pokrov
kvaliteta grožđa
ukupni polifenoli
Resource type
text
Access condition
Open access
Terms of use
URN:NBN
https://urn.nsk.hr/urn:nbn:hr:159:208480
Committer
Jelena Viličić