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http://dx.doi.org/10.5851/kosfa.2019.e70

Effects of Bromelain and Double Emulsion on the Physicochemical Properties of Pork Loin  

Shin, Hyerin (Department of Food Science and Biotechnology of Animal Resources, Konkuk University)
Kim, Hyo Tae (Department of Food Science and Biotechnology of Animal Resources, Konkuk University)
Choi, Mi-Jung (Department of Food Science and Biotechnology of Animal Resources, Konkuk University)
Ko, Eun-Young (Department of Food Science and Biotechnology of Animal Resources, Konkuk University)
Publication Information
Food Science of Animal Resources / v.39, no.6, 2019 , pp. 888-902 More about this Journal
Abstract
Our aim was to investigate the effects of bromelain embedded in double emulsion (DE) on physicochemical properties of pork loin. We evaluated DE characteristics such as size, zeta potential, and microscopy after fabrication. We marinated meat with distilled water (DW), 1% (w/v) bromelain solution, blank DE, and 1% (w/v) bromelain loaded in double emulsion (DE E) for 0, 24, 48, and 72 h at 4℃, and prepared raw meat for control. The marinated samples were assessed for color, water holding capacity, cooking loss, moisture content, pH, protein solubility, Warner-Bratzler shear force (WBSF) and gel electrophoresis. The droplet size of 1% (w/v) bromelain embedded in DE was increased compared with blank DE (p<0.05) and values of zeta potential decreased. The increase in lightness and color difference range of the DE-treated group was lower than that of the DW-treated group (p<0.05). Moreover, treatment by immersion in 1% (w/v) DE E resulted in the highest water holding capacity values (p<0.05) and lower cooking loss values than water base treatment (p<0.05). Results for myofibrillar protein solubility and WBSF showed a similar trend. 1% (w/v) DE E showed degradation of myosin heavy chain after 48 h in sodium dodecyl sulfate-polyacrylamide gel electrophoresis. Thus, bromelain-loaded DE is useful for controlling and handling enzyme activity in food industry.
Keywords
bromelain; double emulsion; tenderization; encapsulation;
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