Assessment of lipid oxidation in indonesian salted‐dried marine catfish (Arius thalassinus)

Abstract

Analysis of Indonesian salted-dried catfish (Arius thalassinusRuppell

Characteristics of the flesh and quality of products of catfishes

“…These phospholipids contain roughly the same content of w3 and w6 fatty acids (w31w6 ratio: 0.7) (Erickson, 1992). The phospholipid content and composition show the same pattern in wild Channel catfish (Chanmugam et al, 1986) and in marine catfish (Choi et al, 1985;Smith et al, 1990) except for the content of w3 fatty acids which are higher in marine catfish.…”

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“…The method of Lücke and Geidel (1935) was used to determine total volatile basic-nitrogen (TVB-N) content as described by Goulas and Kontominas (2005). Thiobarbituric acid (TBA) values, expressed in mg malonaldehyde (MA)/kg, were estimated by using the method of Tarladgis et al (1960) described by Smith et al (1992). The method of Boland and Paige (1971) was used for trimethylamine (TMA) analysis.…”

Defatting and Desalting Treatment of Indonesian Dried-salted Fish: Dietary Effects on Alpha-tocopherol and Peroxide Levels in the Serum and Liver of Rats

“…14) Total fat was determined by extracting with chloroform and methanol. 13) The acetic acid-soluble color and fluorescence intensity of each sample were determined by the methods of Smith et al 2 ) and Maruf et al 5 ) Conjugated dienes were analyzed by the method of Kanner et al,15) and serum glutamate-oxalate transaminase (SGOT) and serum glutamate-pyruvate transaminase (SGPT) were determined colorimetrically.16) Blood urea nitrogen (BUN) was analyzed by the method of Horn and Squire. 1 7) Lipid peroxidation.…”

“…The condensation product of malondialdehyde (MDA) with primary amino groups ofbiomolecules is known to possess fluorescence due to a Schiff base-type structure. 22 ) According to Smith et al 2 ) and Maruf et al,5) fluorescence intensity and acetic acid-soluble color are more appropriate indicators of extensive lipid oxidation and associated browning of dried-salted fish products, rather than the peroxide and thiobarbituric acid (TBA) values. Conjugated dienes, which are formed from methylene bridges of fatty acids with isolated double bonds,23) have been widely used as an index of lipid oxidation.…”