Cilt:27 Sayı:03 (2021)

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https://dspace.ankara.edu.tr/handle/20.500.12575/75094

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Browsing Cilt:27 Sayı:03 (2021) by Subject "Cold storage"

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    Impact of Hot Water and Modified Atmosphere Packaging Treatments on the Postharvest Quality of Pomegranate Fruit (Punica granatum cv. ‘Hicaznar’)
    (Ankara Üniversitesi, 2021-09-04) Özdemir, Ahmet Erhan; Ziraat Fakültesi
    Hot water (HW) and modified atmosphere packaging (MAP) treatments were evaluated to maintain postharvest quality of pomegranate fruit (Punica granatum cv. ‘Hicaznar’). Pomegranates were subjected to hot water (HW) treatment (at 50 °C for 3 min) and packaged with or without MAP bags. Fruit was then kept at 6 °C for 6 months and at 20 °C for 7 days after cold storage period. The untreated and unpackaged fruit was served as a control treatment (C). MAP and HW+MAP treatments was more effective in reducing weight loss, fungal decay and husk scald, compared to HW and C treatments. The lightness and red color intensity of husk and aril (higher values of L* and C* and lower values of h°) were maintained better in the packaged fruit with MAP (MAP + HW+MAP treatments). The unpackaged fruit from HW and C treatments became unmarketable while those from MAP and HW+MAP treatments were still marketable after 6 months of cold storage and shelf life period. Although fungal decay incidence was low in HW-treated fruit, relatively high scald incidence and weight loss had adverse effect on overall visual acceptability of HW-treated fruit. Hot water dipped pomegranate fruit cv. ‘Hicaznar’ (50 °C for 3 min) could be kept in MAP bags for 6 months at 6 °C and for 7 days 20 °C without adverse effect on quality.
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    Role of Controlled Atmosphere, Ultra Low Oxygen or Dynamic Controlled Atmosphere Conditions on Quality Characteristics of ‘Scarlet Spur’ Apple Fruit
    (Ankara Üniversitesi, 2021-09-04) Onursal, Cemile Ebru; Koyuncu, Mehmet Ali; Ziraat Fakültesi
    In this study, the effects of three cold storage technologies, (i) controlled atmosphere-CA (CO2 4%, O2 3%), (ii) ultra low oxygen-ULO and (iii) dynamic controlled atmosphere-DCA, were investigated on fruit quality of ‘Scarlet Spur’ apples stored during 10 months plus 7 days of shelf life at 20 °C. After harvest, apples were stored at 0 °C and 90±5% relative humidity during 10 months in CA, ULO (CO2 3%, O2 1%,) and DCA (CO2 1%, O2 0.5%) conditions. HarvestWatch™ sensors were used for assessment of lower oxygen limit (LOL) of fruit during DCA storage. DCA was the best storage condition suppressing ethylene synthesis and respiration rate during storage. The ULO and DCA conditions showed similar results in the maintenance of firmness and TA amount. Weight loss in these conditions was also lower than CA. No significant difference was observed between storage conditions in terms of SSC. DCA technology gave better results in maintaining color of ‘Scarlet Spur’ than other conditions during cold storage. Result showed that; ULO and DCA conditions were more effective in maintaining quality compared to CA in terms of all quality parameters.