Laser-induced fluorescence spectral analysis of papaya fruits at different stages of ripening.

Laser-induced fluorescence (LIF) spectra were obtained from Maradol papaya fruits at harvested mature, harvested immature, different ripeness stages, and during the ripening. The chlorophyll fluorescence of papaya fruits showed two maxima; one in the red at 680-690 nm (F690), and the other in far-red region at 730-740 nm (F740). The fruits that were harvested immature showed a definite increase in fluorescence intensity at both maxima within the first six days.

Antimicrobial and antioxidant activities of Mexican oregano essential oils (Lippia graveolens H. B. K.) with different composition when microencapsulated in beta-cyclodextrin.

Aims: To study how the antimicrobial and antioxidant activities of Lippia graveolens essential oils with different composition are affected after the microencapsulation process with beta-cyclodextrin (beta CD).

Methods And Results: Three Mexican oregano essential oils (EOs) with different carvacrol/thymol/p-cymene ratios (38 : 3 : 32, 23 : 2 : 42, 7 : 19 : 35) were used in this study. Microencapsulation was carried out by spray-drying.