期刊
FOODS
卷 9, 期 8, 页码 -出版社
MDPI
DOI: 10.3390/foods9081089
关键词
sausages; casings; core colour; discriminant analysis
资金
- Japan Society for the Promotion of Science [P16104]
- JSPS [16F16104, 20K15477]
- Exploratory Collaboration Seed in FY2020 Collaboration Seed Fund at Riken
- Special Postdoctoral Researcher Program at Riken
- Austrian Science Fund (FWF) [P16104] Funding Source: Austrian Science Fund (FWF)
- Grants-in-Aid for Scientific Research [20K15477, 16F16104] Funding Source: KAKEN
A hyperspectral imaging system was for the first time exploited to estimate the core colour of sausages stuffed in natural hog casings or in two hog casings treated with solutions containing surfactants and lactic acid in slush salt. Yellowness of sausages stuffed in natural hog casings (control group, 20.26 +/- 4.81) was significantly higher than that of sausages stuffed in casings modified by submersion for 90 min in a solution containing 1:30 (w/w) soy lecithin:distilled water, 2.5% wt. soy oil, and 21 mL lactic acid per kg NaCl (17.66 +/- 2.89) (p< 0.05). When predicting the lightness and redness of the sausage core, a partial least squares regression model developed from spectra pre-treated with a second derivative showed calibration coefficients of determination (R-c(2)) of 0.73 and 0.76, respectively. Ten, ten, and seven wavelengths were selected as the important optimal wavelengths for lightness, redness, and yellowness, respectively. Those wavelengths provide meaningful information for developing a simple, cost-effective multispectral system to rapidly differentiate sausages based on their core colour. According to the canonical discriminant analysis, lightness possessed the highest discriminant power with which to differentiate sausages stuffed in different casings.
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