Table 4.

Partial least-squares regression models for quantification of live C. jejuni strains treated with garlic-derived organosulfur compoundsa

SpectrabRangeNo. of samplesNo. of latent variablesR calcRMSEE calRPD calR valdRMSE valRPD val
FT-IR1.78–4.91458≥0.98≤0.12≥16.41≥0.95≤0.34≥8.75
Raman1.63–4.89459≥0.99≤0.28≥13.54≥0.95≤0.41≥9.12
  • a Five micromolar diallyl sulfide.

  • b For FT-IR spectroscopy, the wave number from 1,800 to 700 cm−1 was used for model analyses; for Raman spectroscopy, the wave number from 1,800 to 400 cm−1 was used for model analyses.

  • c cal, calibration.

  • d val, validation.