D. Cozzolino et al., Study of dissected lamb muscles by visible and near infrared reflectance spectroscopy for composition assessment, ANIM SCI, 70, 2000, pp. 417-423
Near infrared reflectance spectroscopy (NIRS) was used to study the reflect
ance properties of intact and minced lamb muscles in two presentations to t
he instrument to predict their chemical composition. A fetal of 306 muscles
were examined from 51 lambs, consisting of the following muscles: longissi
mus dorsi, supraspinatus, infraspinatus, semimembranosus, semitendinosus an
d rectus femoris. Modified partial least squares (MPLS) regression models o
f chemical variables yielded R-2 and standard error of cross-validation (SE
CV) of 0.76 (SECV: 10.4), 0.83 (SECV: 5.5) and 0.73 (SECV: 4.7) for moistur
e, crude protein and intramuscular fat in the minced samples expressed as g
/kg on a fresh-weight basis, respectively. Calibrations for intact samples
had lower R2 and higher standard error of cross validation (SECV) compared
with the minced samples.