Antioxidant activities of threadfin bream (nemipterus japonicus) hydrolysate and its effect on oxidative stability of frying oil / Normah Ismail, Mohd Faizzuddin Mustapa Kamal and Kyaw Zay Ya

Ismail, Normah and Mustapa Kamal, Mohd Faizzuddin and Zay Ya, Kyaw (2020) Antioxidant activities of threadfin bream (nemipterus japonicus) hydrolysate and its effect on oxidative stability of frying oil / Normah Ismail, Mohd Faizzuddin Mustapa Kamal and Kyaw Zay Ya. Scientific Research Journal, 17 (2). pp. 130-148. ISSN 2289-649X

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Abstract

The antioxidant activities and oxidative stability of palm olein frying oil added with threadfin bream (TFB) hydrolysate and Nanox 189 were studied. The DPPH radical scavenging activities and chelating effects of ferrous ion were evaluated and compared with α-tocopherol. Oxidative stability after 30 frying cycles were analysed for the induction period, free fatty acids (FFA), peroxide values (PV), total polar compounds (TPC), and viscosity. Palm olein without any antioxidant was used as control. Nanox 189 exhibited a higher percentage on the DPPH scavenging effect and ferrous ion chelating effect than TFB hydrolysate. Frying oil added with Nanox 189 recorded the longest induction period, which was up to 11 hr. while TFB hydrolysate added oil showed an induction period of nine hours. Nanox 189 addition in frying oil yielded the lowest FFA and PV, followed by those added with TFB hydrolysate. The highest readings of TPC were recorded for TFB hydrolysate added oil, which is 13%. Throughout the 30 frying cycles, the addition of TFB hydrolysate recorded a lower percentage increase for viscosity than Nanox 189 with 4.7% compared to the latter, which is 9.6%. Even though the antioxidant activities of TFB hydrolysate was lower than that of Nanox 189, the study suggested some antioxidant potential of TFB hydrolysate based on the DPPH radical scavenging activities and chelating effects of the ferrous ion as well as its ability to slightly improve the oxidative stability of palm olein during the 30 frying cycles.

Metadata

Item Type: Article
Creators:
Creators
Email
Ismail, Normah
norismel@uitm.edu.my
Mustapa Kamal, Mohd Faizzuddin
UNSPECIFIED
Zay Ya, Kyaw
UNSPECIFIED
Subjects: Q Science > QD Chemistry > Physical and theoretical chemistry > Chemical elements
Q Science > QD Chemistry > Extraction (Chemistry)
Divisions: Universiti Teknologi MARA, Shah Alam > Research Management Centre (RMC)
Journal or Publication Title: Scientific Research Journal
UiTM Journal Collections: UiTM Journal > Scientific Research Journal (SRJ)
ISSN: 2289-649X
Volume: 17
Number: 2
Page Range: pp. 130-148
Official URL: https://srj.uitm.edu.my/
Item ID: 34629
Uncontrolled Keywords: threadfin bream, Nemipterus japonicas, hydrolysate
URI: https://ir.uitm.edu.my/id/eprint/34629

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34629

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