RESUMO
This research evaluated the antioxidant, antimicrobial and toxicity potential of the leaf extract of Croton blanchetianus Baill (ExCb) and its effect on the conservation of lamb ribs. The ExCb (control treatment) revealed higher concentration of 2,5-dihydroxybenzoic acid (190.10 mg/g), catechin (84.10 mg/g), rosmarinic acid (56.01 mg/g), 4-hydroxybenzoic acid (52.05 mg/g) and myricetin (40.00 mg/g). And it showed high phenolic content (204.05 mg GAE/g), antioxidant potential (11.78 µg/mL by DPPH and 140.40 mmol Sulf Fer/g by FRAP) and antimicrobial activity with inhibition for Staphylococcus aureus, Listeria innocua, Salmonella enterica, Escherichia coli and Aspergillus flavus. However, it showed toxicity against brine shrimp (Artemia Salina) (LD50 of 66.26 µg/mL). The 2,5-dihydroxybenzoic acid was indicated as the main compound responsible for the toxicity of ExCb. After treatment in an oven at 110 °C for 15 min, the toxicity of ExCb was reduced by over 7 times, the compound 2,5-dihydroxybenzoic acid was not identified, and still maintained the phenolic compounds content of 94.35% and antioxidant activity compared to the control (without thermal treatment). The application of absorbent containing 50 mg/mL of ExCb added to the packaging maintained the quality and prevented the lipid oxidation of lamb ribs during 10 days of refrigerated storage.
