The Effects of Cooling Delay on the Cooling Response and the Physico-Chemical Properties of Eksotika Papaya

Handling papaya in bulk can result in cooling delay of up to forty-eight hours due to equipment, cost and labour factors. The effects of cooling delay on chilling injury, quality and storage life of papaya were studied to develop effective strategies in postharvest handling and storage. Sound fr...

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Main Author: Salleh, Hanim
Format: Thesis
Language:English
English
Published: 1997
Online Access:http://psasir.upm.edu.my/id/eprint/10092/1/FK_1997_18_A.pdf
http://psasir.upm.edu.my/id/eprint/10092/
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spelling my.upm.eprints.100922011-03-09T02:33:19Z http://psasir.upm.edu.my/id/eprint/10092/ The Effects of Cooling Delay on the Cooling Response and the Physico-Chemical Properties of Eksotika Papaya Salleh, Hanim Handling papaya in bulk can result in cooling delay of up to forty-eight hours due to equipment, cost and labour factors. The effects of cooling delay on chilling injury, quality and storage life of papaya were studied to develop effective strategies in postharvest handling and storage. Sound fruits of maturity index 2 were stored at 26°C±2°C (control) and in the cool room (13°C±2°C) approximately 24, 48, 72 and 96 hours after harvest. Storage and fruits' temperature were monitored using data acquisition system to obtain cooling rates. Physico-chemical properties namely weight loss, moisture content, firmness, rupture force, colour, titratable acidity (TA), citric acid content, total soluble solids (TSS) and pH were recorded. Fruits were also access for chilling injury symptoms. Data were taken for fruits at ambient condition, room cooled fruits before (labelled as RCl, RC2, RC3 and RC4 for 1, 2, 3 and 4 days of cooling delay respectively) and after they have ripened (labelled as AF1, AF2, AF3 and AF4 for 1, 2, 3 and 4 days of cooling delay respectively) upon weekly removal from the cool room. Data were compared for significant differences. Longer cooling delay (RC3/AF3 and RC4/AF4) resulted in higher halfcooling time, higher weight loss, better colour development, higher TSS and lower in firmness and lower in chilling injury occurrences when compared to the shorter cooling delay (RCI/AFI and RC2/AF2). No good correlation were found for moisture content, rupture strength, pH, TA and citric acid content in relation to cooling delay. All treatments had acceptable quality up to the second week of storage for the cool room treatments, while the control had acceptable quality up to nine days. The results show that Eksotika papaya can tolerate up to ninety-six hours of cooling delay for a storage life of up to two weeks. This can help reduce the refrigeration cost. 1997-07 Thesis NonPeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/10092/1/FK_1997_18_A.pdf Salleh, Hanim (1997) The Effects of Cooling Delay on the Cooling Response and the Physico-Chemical Properties of Eksotika Papaya. Masters thesis, Universiti Putra Malaysia. English
institution Universiti Putra Malaysia
building UPM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Putra Malaysia
content_source UPM Institutional Repository
url_provider http://psasir.upm.edu.my/
language English
English
description Handling papaya in bulk can result in cooling delay of up to forty-eight hours due to equipment, cost and labour factors. The effects of cooling delay on chilling injury, quality and storage life of papaya were studied to develop effective strategies in postharvest handling and storage. Sound fruits of maturity index 2 were stored at 26°C±2°C (control) and in the cool room (13°C±2°C) approximately 24, 48, 72 and 96 hours after harvest. Storage and fruits' temperature were monitored using data acquisition system to obtain cooling rates. Physico-chemical properties namely weight loss, moisture content, firmness, rupture force, colour, titratable acidity (TA), citric acid content, total soluble solids (TSS) and pH were recorded. Fruits were also access for chilling injury symptoms. Data were taken for fruits at ambient condition, room cooled fruits before (labelled as RCl, RC2, RC3 and RC4 for 1, 2, 3 and 4 days of cooling delay respectively) and after they have ripened (labelled as AF1, AF2, AF3 and AF4 for 1, 2, 3 and 4 days of cooling delay respectively) upon weekly removal from the cool room. Data were compared for significant differences. Longer cooling delay (RC3/AF3 and RC4/AF4) resulted in higher halfcooling time, higher weight loss, better colour development, higher TSS and lower in firmness and lower in chilling injury occurrences when compared to the shorter cooling delay (RCI/AFI and RC2/AF2). No good correlation were found for moisture content, rupture strength, pH, TA and citric acid content in relation to cooling delay. All treatments had acceptable quality up to the second week of storage for the cool room treatments, while the control had acceptable quality up to nine days. The results show that Eksotika papaya can tolerate up to ninety-six hours of cooling delay for a storage life of up to two weeks. This can help reduce the refrigeration cost.
format Thesis
author Salleh, Hanim
spellingShingle Salleh, Hanim
The Effects of Cooling Delay on the Cooling Response and the Physico-Chemical Properties of Eksotika Papaya
author_facet Salleh, Hanim
author_sort Salleh, Hanim
title The Effects of Cooling Delay on the Cooling Response and the Physico-Chemical Properties of Eksotika Papaya
title_short The Effects of Cooling Delay on the Cooling Response and the Physico-Chemical Properties of Eksotika Papaya
title_full The Effects of Cooling Delay on the Cooling Response and the Physico-Chemical Properties of Eksotika Papaya
title_fullStr The Effects of Cooling Delay on the Cooling Response and the Physico-Chemical Properties of Eksotika Papaya
title_full_unstemmed The Effects of Cooling Delay on the Cooling Response and the Physico-Chemical Properties of Eksotika Papaya
title_sort effects of cooling delay on the cooling response and the physico-chemical properties of eksotika papaya
publishDate 1997
url http://psasir.upm.edu.my/id/eprint/10092/1/FK_1997_18_A.pdf
http://psasir.upm.edu.my/id/eprint/10092/
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score 13.214268