Changes in the bioactive properties of strawberries caused by the storage in oxygen‐ and carbon dioxide‐enriched atmospheres

Abstract

The changes in the antioxidant capacity, anti‐inflammatory, and wound healing properties of strawberry fruits as a consequence of the storage in atmospheres enriched in oxygen and carbon dioxide were investigated. Berries were exposed to two different gas compositions: 70% O 2 + 20% CO 2 and 90% O 2 + 10% CO 2 , and stored for up to 20 days at 5°C. The antioxidant capacity, assessed through DPPH and FRAP methods, decreased around 17% in samples exposed to 70% O 2 + 20% CO 2 at day 20. However, the antioxidant activity of fruits stored in 90% O 2 + 10% CO 2 was maintained until day 20 and experienced an increase of around 10% on day 10. Moreover, strawberry stored in 90% O 2 + 10% CO 2 at days 5–10 showed an improved suppression of the pro‐inflammatory genes Cox‐2 and iNOS up to 30% higher than samples at day 0 in an in vitro LPS‐stimulated RAW 264.7 macrophage culture. In addition, berries exposed to 90% O 2 + 10% CO 2 at day 10 showed a human dermal fibroblast migration 30% higher than samples at day 0 in an in vitro skin‐fibroblast‐migration model. Therefore, evidence suggests that strawberry storage in 90% O 2 + 10% CO 2 can be a promissory alternative to offer fruits with enhanced bioactivity.

Extracts from strawberry by-products rich in phenolic compounds reduce the activity of apple polyphenol oxidase

“…the antioxidant capacities of strawberry by-product extracts obtained with : 20 % water, 0.5 % acetic acid) determined by DPPH (9.96 mmol Trolox/kg) and FRAP (4.8 mmol Fe 2+ /kg) methods, respectively(Van de Velde et al, 2019). Latter results confirm the high potential of strawberry by-products as a source of antioxidant compounds.…”

Kinetic modeling of valuable phenolic compounds extraction from strawberry and apple agro‐industrial by‐products

“…For Kaempferol, the higher recovery was achieved with EtOH; 1:40 at 20°C, for both Kaempferol‐3‐ O ‐glucuronide (K3G, 0.1414 g/kg) and KP (0.1024 g/kg). Agro‐industrial strawberry by‐products contain some fruit tissue; therefore, anthocyanins of RF extracts, like Pelargonidin‐3‐ O ‐glucuronide (P3G), come mainly from these tissues, being P3G main compound of the whole fruit (Van de Velde, Esposito, et al, 2019). In RF, the extraction with EtOH, 1:40 at 20°C produced the highest P3G content (0.0141 g/kg).…”

Effects of 1-methylcyclopene and controlled-atmosphere treatment on the quality and antioxidant capacity of blueberries during storage

“…production rate, H 2 O 2 content and respiration rate and by maintaining both the levels of ATP and energy charge (Li et al, 2016). Van de Velde et al (2019) suggested that 90% O 2 + 10% CO 2 could be a potential approach to promote bioactivity within strawberry fruits. In addition, the CA condition of 3 kPa O 2 + 6 kPa CO 2 was suggested to have higher efficacy in retaining the quality of fresh-cut jackfruit bulbs (Saxena et al, 2013).…”