Influence of packaging on the conservation of quality attributes of lamb’s-ear leaves during storage

Abstract

The objective of this study was to evaluate the influence of the packaging system on the useful life and post-harvest quality of lamb’s-ear leaves (Stachys byzantina L.). The sanitized sheets were packaged in four different packaging systems: (A) rigid polyethylene (PET), (B) PET together with ethylene-absorbing sachet, (C) PET wrapped with high barrier plastic film, and (D) PET together with an ethylene-absorbing sachet and wrapped with high barrier plastic film and stored at 7 ° C. Samples for physical-chemical analysis, bioactive compounds and antioxidant activity were removed before storing and at 5, 10 and 15 days of storage. The leaves contained in packages C showed less loss of mass and in system D they showed greater preservation of color attributes (L *, C * and °H). The packaging did not influence the contents of bioactive compounds, which showed higher values at 5 days of storage. The leaves stored in A, B, C and D showed high antioxidant capacity until the 15th day of storage. It was concluded that the quality atrib\utes of the lamb’s-ear leaves were kept in all packaging systems throughout 15 days of cold storage. The contents of bioactive compounds and antioxidant activity showed the highest values up to 5 days of storage at 7 ºC. Thus, considering the economic aspects and practicality in handling, packaging A is the most suitable for refrigerated storage (7 ºC) and commercialization of fresh lamb’s-ear leaves up to 15 days of storage.

Influence of Harvest Time on the Chemical Profile of Pereskia aculeate Mill. Using Paper Spray Mass Spectrometry

“…It was reported that TF contents near to 680 mg 100 g −1 sample on dry base and TA contents near to 56 mg cyanidin-3-glucoside 100 g −1 sample on dry base for the leaves of Stachys byzantina were observed, which is also a leafy PANC collected at the same site [28]. The TF contents of 1215.90 ± 201.35 mg 100 g −1 sample on dry base and a TA of 117.23 ± 19.32 mg cyanidin-3-glycoside 100 g −1 sample on dry base were previously presented for in natura GBB leaves collected at the same site [16].…”