Sangadkit, Wipavadee

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Preferred name
Sangadkit, Wipavadee
Alternative Name
Sangadkit, W.
Main Affiliation
Email
wipavadee.sa@kmitl.ac.th

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    Item type:Publication,
    Impact of wall materials on the physicochemical properties of spray-dried microencapsulated soybean oil bodies
    (2025-12-01)
    Twumasi, Grace Asantewaa
    ;
    Sangadkit, Wipavadee
    ;
    Manareet, Nitjaree
    ;
    Aussanasuwannakul, Aunchalee
    ;
    Ishii, Toya
    Soybean oil bodies (SOB) are naturally occurring emulsions with promising applications in food formulations. However, their sensitivity to environmental factors such as moisture, oxidation, and temperature fluctuations, coupled with their native instability, makes them difficult to incorporate into food products. This necessitates effective encapsulation strategies to preserve their bioactive properties, extend shelf life, and improve processability. This study aimed to encapsulate SOB using a spray drying technique with maltodextrin, whey protein isolate, and soy lecithin as wall materials. The encapsulation efficiency (56.43 - 85.41%) demonstrated the effective retention of oil bodies within the microparticles. The resulting powders were further characterized for powder yield, moisture content, water activity, color, wettability, solubility, hygroscopicity, particle size, surface charge, and morphological properties. SOB-maltodextrin microparticles showed higher yield and exhibited lower wettability time, indicating improved encapsulation efficiency and enhanced reconstitution ability. The whey protein isolate-based microparticles exhibited higher solubility (87.65 - 88.62%) and the smallest particle size, reflecting improved emulsification and stabilization properties, whereas soy lecithin-based formulations showed higher absolute surface charge (37.79 - 45.91 mV), lower moisture content, and reduced water activity, indicating superior stability. Spray-dried powders demonstrated good reconstitution properties, making them suitable for food applications. These findings highlight the potential of spray-drying, along with the choice of wall material, as key factors in the effective encapsulation of SOB, paving the way for the development of more stable, functional, and sustainable food products.
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    Item type:Publication,
    Characterization and physicochemical properties of a novel microencapsulated bio-calcium from Asian sea bass bones
    (2025-12-01)
    Phengleng, Salinee
    ;
    Sangadkit, Wipavadee
    ;
    Wattanachaisaereekul, Songsak
    ;
    Sirison, Jiraporn
    ;
    Ruangsomboon, Suneerat
    Calcium is the most abundant mineral in the human body, yet intake remains insufficient in many populations. Fishbone-derived bio-calcium from Asian sea bass (Lates calcarifer), containing approximately 37.5 % calcium (dry weight), offers a cost-effective source. However, its primary form, hydroxyapatite, has low solubility due to high crystallinity, limiting its application in food fortification. This study aimed to enhance the physicochemical properties of bio-calcium (B) powders by encapsulating them with maltodextrin (M), gum arabic (G), and their combination (MG) at 5 %, 10 %, and 15 % (w/v) using spray drying. A 1:4 (w/w) ratio of B to wall materials was applied at 180 °C (inlet) and 60 °C (outlet) temperatures. Powder yields ranged from 25.2 % (15 % BG) to 30.3 % (15 % BM), with no significant differences (p > 0.05) among treatments. Encapsulated powders had higher lightness (L*) than B. The highest calcium content and encapsulation efficiency were observed in 5 % BG, while BM showed the lowest. Moisture content and water activity remained below 10 % and 0.6 %, respectively. BG had the highest hygroscopicity, while wall concentration had no significant (p > 0.05) impact. Encapsulation improved water solubility index (75.4–86.5 %), especially in BM. Particle sizes ranged from 0.92 µm (10 % BMG) to 2.89 µm (15 % BM), while zeta potentials ranged from -8.71 mV (15 % BM) to -20.90 mV (15 % BMG). Encapsulated powders were more spherical and smoother than B, while BG particles showed aggregation, whereas BMG showed mixed morphologies. These findings suggest that encapsulation enhanced the physicochemical properties of bio-calcium, supporting its potential application in calcium-fortified foods and dietary supplements.