Naslov
Type and planting positions influences on sensory characteristics, color and texture of fresh mandarin

Autori
Predrag Putnik, Branka Levaj, Nada Vahčić, Verica Dragović-Uzelac, Damir Ježek

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
7th International Congress of Food Technologists, Biotechnologists and Nutritionists / Medić, Helga - : Hrvatsko društvo prehrambenih tehnologa, biotehnologa i nutricionista, 2011, 245-245

ISBN
978-953-99725-3-8

Skup
7th International Congress of Food Technologists, Biotechnologists and Nutritionists

Mjesto i datum
Opatija, Hrvatska, 20.09.2011. - 23.09.2011

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
mandarin; Satsuma; Okitsu; tangerine; sensory; texture; colorimetry

Sažetak
Neretva valley has main planting positions for breeding mandarin in Croatia. Different factors 7 (e.g. micro-location, cultivar, harvest time, climate) define important palatable qualities. The 8 purpose of this work is to document 6 positional influences of 2 annual harvests over 2 seasons 9 on sensory characteristics, color/texture (measured instrumentally/sensory) in mandarin Citrus 10 unshiu Markovich cv. Okitsu. Further aim was to explore instrumental/sensory correlation for 11 texture/color. Color (L, a*, b*) was measured (n=468) by CIELAB method with Konica-Minolta 12 colorimeter, texture (F/[N], d/[mm]) was measured (n=234) by TA-XT2i StableMicro-Systems 13 texture analyzer. Sensory evaluation (cultivar/type, color, flavor, odor and texture) (n=679) was 14 done in aerated room (20°C), panelist were highly educated (37y) with +9 per session. Sensory 15 evaluation was approached by quantitative descriptive analysis that described main 16 characteristics of our sample. Discrete categorical variables were analyzed using χ2 tests and 17 continuous variables using nonparametric t-tests. Nonparametric ANOVA was used for analysis 18 of variance, and Pearson's correlation analysis measured the strength of associations. The 19 significance levels for all tests were α=0.05 or less. Analyses were performed with SPSS (v.17). 20 Planting position 5 ranked the best and 1 the worst (p<0.01) regarding total sensory score 21 (USO), with the best year being 2009 (p<0.01). Negative correlation (r=-0.5, p=0.039) was 22 found between instrumental colorimetry [a*/b*] ratio and average sensory color evaluation. 23 Average values for a*=7.0±1.6, b*=17.0±3.4, and [F/d] ratio was 0.149±0.119 N/mm, and it is 24 generally lower for 2nd harvest. Textural sensory scores negatively correlated with texture 25 measured instrumentally (r=-0.58, p=0.012 ; r=-0.63, p=0.05). Okitsu mandarins were attractive 26 to consumers/good technological choice because of their high USO/measure of taste, low 27 [a*/b*] (more appealing yellowish-red color, signaling ripeness) and low [F/d] (less chewy).

Izvorni jezik
Engleski

Znanstvena područja
Prehrambena tehnologija

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