title: Resistant starch contents of native and heat-moisture treated jackfruit seed starch.
abstract: Native jackfruit seed starch (JFS) contains 30% w/w type II resistant starch (RS2) and can potentially be developed as a new commercial source of RS for food and pharmaceutical application. Heat-moisture treatment (HMT) was explored as a mean to increase RS content of native JFS. The effect of the conditions was tested at varied moisture contents (MC), temperatures, and times. Moisture levels of 20-25%, together with temperatures 80-110°C, generally resulted in increases of RS amount. The highest amount of RS (52.2%) was achieved under treatment conditions of 25% MC and 80°C, for 16 h (JF-25-80-16). FT-IR peak ratio at 1047/1022 cm(-1) suggested increases in ordered structure in several HMT-JFS samples with increased RS. SEM showed no significant change in the granule appearance, except at high moisture/temperature treatment. XRD revealed no significant change in peaks intensities, suggesting the crystallinity within the granule was mostly retained. DSC showed increases in T g and, in most cases, ΔT, as the MC was increased in the samples. Slight but significant decreases in ΔH were observed in samples with low RS, indicating that a combination of high moisture and temperature might cause partial gelatinization. HMT-JFS with higher RS exhibited less swelling, while the solubility remained mostly unchanged.
authors: Department of Pharmaceutical Sciences, Faculty of Pharmacy, Chiang Mai University, Suthep Road, Mueang Chiang Mai District, Chiang Mai 50200, Thailand.
authors: Ornanong S
authors: OS
authors: Kittipongpatana
authors: Department of Pharmaceutical Sciences, Faculty of Pharmacy, Chiang Mai University, Suthep Road, Mueang Chiang Mai District, Chiang Mai 50200, Thailand.
authors: Nisit
authors: 0000-0003-4407-5488
authors: N
authors: Kittipongpatana
mesh_terms: D031622:Artocarpus / Q000737:chemistry* / Q000648:ultrastructure; D005511:Food Handling / Q000379:methods; D006358:Hot Temperature; D006813:Humidity; D008855:Microscopy, Electron, Scanning; D012639:Seeds / Q000737:chemistry* / Q000648:ultrastructure; D013213:Starch / Q000032:analysis*; D014961:X-Ray Diffraction
chemical_list: D013213:Starch
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