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| - Near-Infrared Reflectance Spectroscopy for Predicting AminoAcids Content in Intact Processed Animal Proteins
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| - Near-infrared calibrations were developed for the instantaneous prediction of amino acids compositionof processed animal proteins (PAPs). Two sample presentation modes were compared (ground vsintact) for demonstrating the viability of the analysis in the intact form, avoiding the need for milling.Modified partial least-squares (MPLS) equations for the prediction of amino acids in PAPs weredeveloped using the same set of samples (N = 92 PAPs) analyzed in ground and intact form and inthree cups differing in the optical window size. The standard error for cross validation (SECV) andthe coefficient of determination (1-VR) values yielded with the calibrations developed using the samplesanalyzed in the intact form showed similar or even better accuracy than those obtained with finelyground samples. The excellent predictive ability (1-VR > 0.90; CV < 3.0%) obtained for the predictionof amino acids in intact processed animal proteins opens an enormous expectative for the on-lineimplementation of NIRS technology in the processing and marketing of these important protein feedingredients, alleviating the costs and time associated with the routine quality controls. Keywords: Processed animal proteins; NIRS; amino acids composition; intact NIRS analysis
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