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Title

Combined use of nitrogen and coatings to improve the quality of mechanically harvested Manzanilla olives

AuthorsRamírez, Eva ; Sánchez, Antonio Higinio; Romero, Concepción; Brenes Balbuena, Manuel
Issue Date2015
PublisherElsevier
CitationFood Chemistry 171: 50- 55 (2015)
Abstract© 2014 Elsevier Ltd. All rights reserved. The combined effect of an edible coating and a nitrogen atmosphere on the quality of Manzanilla olives mechanically harvested and processed as Spanish-style green olives was assessed. The percentage of olives free of any brown spots ranged between 35-50%, 10-25% and 50-65% for fruit directly processed, storage under nitrogen and coated and storage under nitrogen respectively. Moreover, olives stored in the open air developed brown spots due to the oxidation of oleuropein. By contrast, the anoxic conditions prevented oleuropein from undergoing enzymatic oxidation but not from its enzymatic hydrolysis. Hence, the phenolic derivative HyEDA was formed in olives stored under nitrogen, and this substance was rapidly oxidized in the open air to give rise to brown spots although to a lesser extent in the coated fruit. Therefore, the postharvest storage of coated olives under nitrogen can be a good method to prevent bruise damage in mechanically harvested fruit.
URIhttp://hdl.handle.net/10261/125103
DOI10.1016/j.foodchem.2014.08.103
Identifiersdoi: 10.1016/j.foodchem.2014.08.103
issn: 1873-7072
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