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Volume 7, Issue 1      January - March, 2019

Microbiological quality and sensory evaluation of partially dried mango for fruit salad, Kerabu Mangga
 

Lani Mohd Nizam1, Adnan Nur Ardawati1, Mohd Maidin Nurmahani1*, Ibrahim Roshita2, Hassan Zaiton3

1School of Food Science and Technology, Universiti Malaysia Terengganu, 21030 Kuala Nerus, Terengganu, Malaysia

2Department of Chemical Engineering Technology, Faculty of Engineering Technology, Universiti Malaysia Perlis, Uniciti Alam Campus Sg. Chuchuh, 02100 Pedang Besar, Perlis, Malaysia

3Faculty of Science and Technology, Universiti Sains Islam Malaysia (USIM), Bandar Baru Nilai, 71800 Nilai, Negeri Sembilan, Malaysia

Abstract

Kerabu Mangga is a fruit salad that is made from unripe matured mangoes. This salad is prepared fresh mixed with other ingredients. Since this salad has limited shelf life, the mango were dried at 60oC for one and two hours, then mixed with other ingredients in an attempt to make this salad has longer shelf life and readily available when mangoes are not in season. The effects of drying on water activity (aw), microbial load, shelf life of ‘Kerabu Mangga’ during storage at room (28 ± 2ºC) and chilled (5 ± 1ºC) temperatures as well as determination acceptance and nutrient compositions of the prepared ‘Kerabu Mangga’ were carried out. Drying treatment reduced the initial water activity (aw) of fresh mango from 0.994 to 0.953 and 0.874 after 1 and 2 h drying, respectively, and the microbial load was reduced (~ 0.6 log10 CFU/g) after drying treatments. Drying at 60°C affected significantly (p<0.05) the appearance and colour of the dried mango slices, without affecting the overall acceptability of the prepared Kerabu Mangga.  Storage temperature affected significantly (p<0.05) the microbial load (Total Plate Count), where chiller storage took 10 days  compared to 12 h for room temperature to reach spoilage to occur (normally at log10 6.00 CFU/g). For the nutrient compositions, only carbohydrate contents showed significant increased at (P<0.05), however, vitamin C content showed significant decreased (P<0.05). Drying for only 1 and 2 hours was found to be suitable for partially dried ‘Kerabu Mangga’ which resulted in negligible effect on its overall acceptance. Drying the mango slices at 60oC for 2 h resulted in longer shelf life than 1 h or without heat treatment.

Keywords: Microbiological quality, Sensory evaluation, Dried mango, Kerabu mangga

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