Ultrasound-assisted extraction of guava and papaya leaves for the development of functional shrimp patties

Stabilization of Ficus carica L. Drink by utilizing varying levels of ultrasound-assisted moringa extract as a natural preservative

Fig fruit (Ficus carica L.) drink is a source of healthy minerals, vitamins, and bioactive ingredients however to improve the shelf-life of functional drink naturally, moringa leaf extract was compared with optimized concentration of potassium metabisulphite (synthetic preservative). Purposely, fig fruit drink, without preservatives was considered as negative control whereas, 0.2 % potassium metabisulphite-based fig fruit drink was taken as positive control. Further, ultrasound assisted extracts of moringa at varied levels; 5, 10, 15, and 20 % were incorporated in the fig fruit drink as natural preservative to test antioxidant, storage, and sensory quality against control samples. Resultantly, the maximum loss in antioxidant activity (18-38 %) and functional ingredients (24-56 %) was observed in negative control sample, in response to high microbial expansion till the termination of the study. Additionally, acceptability score for negative control sample was maximum at Day 1, that afterwards faced significant decline at 30th Day (6.6 ± 0.3). In contrast, positive control sample demonstrated minimum loss of free radical scavenging ability (7-22 %), polyphenols (11 %) and flavonoids (7 %) thus indicated maximum control on microbes i.e. 61-63 % as compared to negative control. Further, positive control sample indicated optimum consumer preference (7.0 ± 0.3) that remained stable throughout storage. Further, as the concentration of moringa exceeded from 5 to 20 %, the loss of functional ingredients reduced from 13 to 24 to 6-11 % and deterioration in antioxidant capacity suppressed from 14 to 26 to 8-20 %, correspondingly however, the sensory acceptability showed a declining trend, and 20 % moringa based sample portrayed poor consumer response (5.0 ± 0.2). Lastly, it was deduced that control on microbes was directly proportional to the concentration of moringa extract in fig fruit drink, that was poor in 5 % moringa extract concentration; 32-54 %. Conclusively, customer preference was reasonable (6 ± 0) at 15 % moringa extract concentration so this level should be employed in fig fruit drink for realistic control on bacterial (57 %) and fungal (47 %) activities.

Impact of gamma irradiation and guava leaf extract on the quality and storage stability of chicken patties

The current investigation was carried out to evaluate the impact of gamma irradiation and guava leaf extract (GLE) on chicken meat patties. The effects of treatments on chicken meat patties were determined by physicochemical, stability (oxidative and microbial), and antioxidant status during different packaging (aerobic and vacuum) at storage intervals (0, 5, and 10 days). The changes in physicochemical parameters of chicken patties were observed on various treatments, storage intervals, and different packaging. The TBARS and POV were found to increase significantly (p < .05) on 2 kGy and with the passage of storage time. The results of microbial load in samples were found to decrease on gamma irradiation with and without GLE. The antioxidant profile in chicken patties was with respect to control. Slight changes were seen in sensory parameters on different treatments at storage intervals. It is concluded that gamma irradiation eliminated the microbes and different concentrations of GLE improve the stability and antioxidant profile of chicken patties.