Figure 2: Projection of the scores (different apples treated with citrus essential oil, natural antimicrobials and their combination) and loadings (sensors) on the factor-plane (1x2). PC1 and PC2 explained 57.4% and 26.9 of the total variance respectively. Cluster 1: A0d (control 0 d), B0d (citral 0 d), C0d (hexanal 0 d), D0d (citral+hexanal 0 d), E0d (citral+citron oil 0 d), F0d (citral+2-(E)-hexenal 0 d), G0d (citron oil+carvacrol 0 d), H0d (hexanal+2-(E)-hexenal 0 d), S3d (control 3 d). Cluster 2: T10d (citral 10 d), U10d (hexanal 10 d), V0d (citral+hexanal 10 d), Z10d (citral+citron oil 10 d), AA10d (citral+2-(E)-hexenal 10 d), AB10d (citron oil+carvacrol 10 d), AC10d (hexanal+2-(E)-hexenal 10 d), L3d (citral 3 d), M3d (hexanal 3 d). Cluster 3: N3d (citral+hexanal 3 d), O3d (citral+citron oil 3 d), P3d (citral+2-(E)-hexenal 3 d), Q3d (citron oil+carvacrol 3 d), R3d (hexanal+2-(E)-hexenal 3 d), I10d (control 10 d).