Naslov
Statistical Evaluation of Dynamic Changes of "Idared" Apples Colour During Storage

Autori
Magdić, Damir ; Dobričević, Nadica

Izvornik
ACS. Agriculturae conspectus scintificus (1331-7768) 72 (2007), 4; 311-316

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Idared; storage; colour; CIE Lab; RGB

Sažetak
Colour changes on fruit during storage from brighter to darker nuances are caused by chemical reactions which oft en have degradative changes as a consequence. In this paper, evaluation of colour changes was done in CIE Lab colour model by using Minolta colorimeter CR-300 and in RGB colour model by applying digital image analysis method. In the aim of increasing of sample representativity analyzed apples were taken from diff erent positions on trees and from diff erent trees in orchard that was planted in 1983. Apples were harvested at a big commercial orchard in two diff erent harvest times during one season. 30 apple pieces of Idared cultivar were analyzed immediately aft er harvest and periodically during storage for 20 weeks at 0 º ; C and 85-88% relative humidity. Apple temperature of all analyzed samples during storage period was T=0± ; 0.4 º ; C. Mean colour change of apple skin determined in CIE Lab was Δ Eab=1.53, while in RGB color model was Δ ERGB=1.81. Total apple skin colour changes in Lab colour model was Δ Eab=5.90, while in RGB colour model was Δ ERGB=8.48. Both methods showed apple skin colour changes in the same way. Correlation between results was found to be 0.32 (p<0.05).

Izvorni jezik
Engleski

Znanstvena područja
Poljoprivreda (agronomija), Prehrambena tehnologija

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