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    The feasibility of using pulsed-vacuum in stimulating calcium-alginate hydrogel balls

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    Journal Article (4.059Mb)
    Date
    2021-07-01
    Author
    Jinnoros, J.
    Innawong, B.
    Udomkun, P.
    Parakulsuksatid, P.
    Silva, J.L.
    Type
    Journal Article
    Review Status
    Peer Review
    Target Audience
    Scientists
    Metadata
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    Abstract/Description
    The effect of the pulsed-vacuum stimulation (PVS) on the external gelation process of calcium-alginate (Ca-Alg) hydrogel balls was studied. The process was conducted at four different working pressures (8, 35, 61, and 101 kPa) for three pulsed-vacuum cycles (one cycle consisted of three repetitions of 10 min of depressurization and 10 min of vacuum liberation). The diffusion coefficients (D) of calcium cations (Ca2+) gradually reduced over time and were significantly pronounced (p < 0.05) at the first three hours of the external gelation process. The rate of weight reduction (WR) and rate of volume shrinkage (Sv) varied directly according to the D value of Ca2+. A significant linear relationship between WR and Sv was observed for all working pressures (R2 > 0.91). An application of a pulsed vacuum at 8 kPa led to the highest weight reduction and shrinkage of Ca-Alg hydrogel samples compared to other working pressures, while 61 kPa seemed to be the best condition. Although all textural characteristics (hardness, breaking deformation, Young’s modulus, and rupture strength) did not directly variate by the level of working pressures, they were likely correlated with the levels of WR and Sv. Scanning electron micrographs (SEM) supported that the working pressure affected the characteristics of Ca-Alg hydrogel structure. Samples stimulated at a working pressure of 8 kPa showed higher deformation with heterogenous structure, large cavities, and looser layer when compared with those at 61 kPa. These results indicate the PVS is a promising technology that can be effectively applied in the external gelation process of Ca-Alg gel.
    https://dx.doi.org/10.3390/foods10071521
    Multi standard citation
    Permanent link to this item
    https://hdl.handle.net/20.500.12478/7170
    IITA Authors ORCID
    Patchimaporn Udomkunhttps://orcid.org/0000-0003-0115-1997
    Digital Object Identifier (DOI)
    https://dx.doi.org/10.3390/foods10071521
    Research Themes
    Nutrition and Human Health
    IITA Subjects
    Aflatoxin; Nutrition
    Agrovoc Terms
    Calcium; Diffusion; External; Jellification; Behaviour; Hydrodynamics; Mode of action
    Regions
    Asia; Southeast Asia
    Countries
    Thailand
    Hubs
    Southern Africa Hub
    Journals
    Foods
    Collections
    • Journal and Journal Articles4835
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