Physicochemical properties of tarap (Artocarpus adoratisimus) starch

Noorfarahzilah Masri, and Jau, Shya Lee and Mansoor Abdul Hamid, and Jaharul, M. H. A, and Umi Hartina Mohd Razali, and Zainol, M. K., and Hasmadi Mamat, (2020) Physicochemical properties of tarap (Artocarpus adoratisimus) starch. Food Research, 4 (3). pp. 602-611.

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The objective of the research was to investigate the physicochemical characteristics of Tarap fruit starch. In this study, young Tarap fruit starch was extracted and the percentage of total starch, resistant starch, amylose and amylopectin were determined. Scanning electron microscope was used to evaluate the morphological features of the starch granule. Swelling, pasting, gelatinization, retrogradation and in vitro digestibility were also investigated. A total of 17.85% starch was successfully extracted from unripe Tarap fruit, whereas the amount of total starch and resistant starch were 89.14% and 47.82%, respectively. The amounts of rapid digestible starch and slowly digestible starch were 6.58% and 23.25%, respectively. Results found that the amylopectin content was higher than amylose (77.15% and 11.97%). The starch granules were round and polygon in shapes with smooth surfaces. The average of starch granules size was range from 6.50 to 8.30 μm with 7.4 μm of mean granule diameter. Pasting properties showed that peak viscosity was observed at about 6.5 min at 73.5oC. Tarap starch gelatinization temperatures (onset, 71.63°C; peak, 74.56°C; conclusion, 78.24°C) and enthalpy of gelatinization (ΔHgel) (3.74 J/g) were higher while the retrograded starches show lower retrogradation temperature and enthalpy than native starches. Unripe Tarap starch showed good potential to be utilized as adhesives and thickener for industrial applications.

Item Type: Article
Uncontrolled Keywords: Tarap, Artocarpus, Starch, Pasting, Gelatinization, Retrogradation
Subjects: S Agriculture > SB Plant culture
T Technology > TP Chemical technology > TP368-456 Food processing and manufacture
Divisions: FACULTY > Faculty of Food Science and Nutrition
Date Deposited: 02 Mar 2020 07:41
Last Modified: 17 Apr 2020 15:50

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