Table 6. Correlation coefficients between color values (L*, a*, b*, ΔE) and antioxidant capacities (TPC, TFC, DPPH, ABTS), amino acids (GABA, TA, EA) according to germination days of brown rice

DPPH1) ABTS TPC TFC GABA EA TA
L* 0.263 0.487***2) −0.778*** −0.355* 0.024 0.048 0.066
a* −0.298* −0.573*** 0.749*** 0.342* −0.143 −0.167 −0.182
b* 0.650*** 0.438** 0.511*** 0.573*** 0.678*** 0.607*** 0.664***
ΔE 0.466** −0.051 0.927*** 0.488** 0.631*** 0.543*** 0.557***
DPPH, DPPH radical scavenging activity; ABTS, ABTS radical scavenging activity; TPC, total phenolic content; TFC, total flavonoid content; GABA, γ-aminobutyric acid; TA, total aminoacid; EA, essential amino acid (Thr+Lys+Met+Val+Ile+Leu+Phe); L*, lightness; a*, redness; b*, yellowness; ΔE, total color difference.
*Significant at p<0.05; **significant at p<0.01; ***significant at p<0.001.