Multivariate statistical {using factor and discriminant} analyses of some selected chemical and physical freshness indicators of fish [Scomberomorus brasiliensis (carite)] muscle tissue samples
✍ Scribed by Derrick A Balladin; Dyer Narinesingh; Valerie A Stoute; That T Ngo
- Publisher
- Elsevier Science
- Year
- 1998
- Tongue
- English
- Weight
- 174 KB
- Volume
- 40
- Category
- Article
- ISSN
- 0169-7439
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✦ Synopsis
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Ž .x Seventy-eight samples of Scomberomorus brasiliensis carite muscle tissue were analyzed for % fat, hypoxanthine con-Ž . tent determined by a flow injection method , total volatile acids and bases, total bacterial count, and textural parameters Ž . firmness, hardness, fracturability, cohesiveness, chewiness, and elasticity were subjected to discriminant and factor analyses. The apparent error rate obtained by discriminant analysis with all the parameters in the analysis was about 5.6%. How-Ž . ever, classification was not improved apparent error rate 6.9% when cohesiveness and chewiness were excluded from the Ž . analysis. The stepwise methods of selection Wilks and Minresid H = FI ranked second, and fourth when the Mahal and Maxminf methods were used. In the factor analysis, using the principal component analysis, five factors were extracted. Fac-Ž . Ž . tor loadings relate factor 1 tastiness with hypoxanthine concentration, total volatile acids and bases: factors 2, 3, 5 texture Ž . with the textural attributes; and factor 4 rancidity with the % fat content. Rotation of the reference axes showed that factors 1, 2 and 5 remained unchanged, while factors 3 and 4 were interchanged.