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Author: search.filters.author.Supapavnich, S.

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    Physicochemical properties and oxidative stability of oils from samrong (Sterculia foetida) seed
    (2018-12-01)
    Chanyawiwatkul, J.
    ;
    Supapavnich, S.
    ;
    Takeungwongtrakul, S.
    Samrong seed kernel consisted of 5.91 ± 0.12% moisture, 2.80 ± 0.17% ash, 46.09 ±0.44% oil, 11.68 ±0.16% protein and 33.52 ±0.07% carbohydrate. The crude oil was extracted from samrong seed kernel using cold hexane as solvent. The oil from samrong seed kernel contained 27.32% saturated fatty acid (SFA), 5.30% monounsaturated fatty acid (MUFA) and 55.95% poly-unsaturated fatty acid (PUFA). Gamma-linolenic acid (47.80%) was the dominant fatty acid, followed by palmitic acid (16.49%) and steric acid (10.45%). The physicochemical properties including color, viscosity, tocopherol content, total phenolic content, acid value, free fatty acid, peroxide value (PV), thiobarbituric acid reactive substances (TBARS) and ρ-anisidine value of kernel oil were determined. When kernel oil was stored at 30°C for 48 days, the oxidative stability of kernel oil was also examined. The kernel oil had the increase in PV and TBARS within the first 36 days of storage (P < 0.05). Subsequently, a decrease in PV and TBARS were noticeable up to day 48 (P < 0.05). Oil from samrong seed kernel showed high quality and oxidative stability during storage. Thus, samrong seed kernel could be used as a potential source of edible oil for use in the food industrial.
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    Efficiency of salicylic acid immersion using fine-bubble technique on quality of Musa AAA fruit during ripening
    (2018-12-01)
    Anuchai, J.
    ;
    Chumthongwattana, M.
    ;
    Tepsorn, R.
    ;
    Supapavnich, S.
    The physiological quality and bioactive compound in changes of banana (Musa AAA) fruit was determined by using 2 mM salicylic acid solution with 2 different methods. Dipping (SA) and immersion using fine-bubble technique (SAF) with 2 different period of time (15 and 30 minutes) were used. Peel color, fruit firmness, total acidity (TA), antioxidant, total phenol and total flavonoid were investigated. The result showed that banana treated with SAF for 15 minutes could maintain lightness (L*) and yellowness (b*) of peel color. In term of fruit firmness, there were not significantly different among the treatments. After 4 days of color break, banana treated with SAF for 15 minutes also resulted in high TA, antioxidant and total phenol. While SAF for 30 minutes resulted in high total flavonoid contents. It concluded that SAF technique can maintain and strengthen physiological quality and bioactive compound changes of banana (Musa AAA) fruit during ripening.