Gelling and emulsifying properties of tiger puffer (Takifugu rubripes) skin gelatin as manipulated by pH

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60076658%3A12520%2F23%3A43906210" target="_blank" >RIV/60076658:12520/23:43906210 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1016/j.molliq.2022.120886" target="_blank" >https://doi.org/10.1016/j.molliq.2022.120886</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.molliq.2022.120886" target="_blank" >10.1016/j.molliq.2022.120886</a>

Result language
angličtina
Original language name
Gelling and emulsifying properties of tiger puffer (Takifugu rubripes) skin gelatin as manipulated by pH
Original language description
The study investigated the modifications of gelling and emulsifying properties of tiger puffer skin gelatin (TPSG) by varying pH and the possible mechanism behind these modifications. f-potential analysis indicated the isoelectric point of TPSG was 6.5, and TPSG solution showed the largest particle size at pH6. Atomic force microscopy observation revealed that TPSG at pH 6 and 7 exhibited large size protein aggregates (370 and 340 nm) while TPSG at pH 4 and 9 showed small size irregular aggregates (<150 nm). FTIR analysis suggested that amide I band of TPSG at pH 6 and 7 was shifted to lower wavenumber. Secondary structure analysis suggested they contained high proportion of a-helix. The highest gel strength and gelling and cooling temperature were observed at pH 6, inconsistent with a gel microstructure characterized with dense network and small voids. Moreover, TPSG at pH 6 and 7 exhibited the lowest emulsion activity index but highest emulsion stability index. However, microscopic analysis found TPSG formed stable and small size emulsion droplets at pH 5 and 8. The results suggest that appropriate pH adjustment would provide good functional properties to TPSG.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10608 - Biochemistry and molecular biology

Project
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Continuities
S - Specificky vyzkum na vysokych skolach<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2023
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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