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The Hibiscus sabdariffa (H. sabdariffa) belongs to the Malvaceae family, and originates from Africa. It is characterized by a high polyphenols content (e.g., quercetin and anthocyanins), and has recognized bioactivity, that makes this plant an interesting resource for possible addition of its extracts to dairy beverages and obtain functional beverages. Nonetheless, it may be observed that many of these phenolic compounds are not stable depending on the environmental conditions. In this work, we propose the use of nanostructured lipid carriers (NLC) as a carrier for the loading of H. sabdariffa extracts, for further incorporation in daily beverages. Polyphenols-enriched extracts from H. sabdariffa were obtained using two distinct extraction approaches: by (i) microwave-assisted extraction (MAE), or by (ii) pressurized liquid extraction (PLE). The obtained extracts were then loaded into NLC to obtain two distinct samples identified as: HS-MAE-NLC and HS-PLE-NLC. The developed nanoparticles were then incorporated into a dairy beverage for the production of fortified milks identified with the same names. The long-term stability, texture properties and in vitro release profile were evaluated. The results show that the fortified milks, HS-MAE-NLC and HS-PLE-NLC, were stable under stress conditions attributed to the enhanced stability provided by the protein content present in the milk. The in vitro release profile of quercetin and anthocyanins from NLC-enriched dairy beverage was more prolonged than the milk containing the non-loaded extract, fitting better to the Korsmeyers–Peppas model. From our results, NLC may be considered a potential approach to formulate photoprotective, anti-inflammatory, and antioxidant bioactives from H. sabdariffa adding the extracts into dairy beverages to increase their bioavailability, and bioactivity. [ABSTRACT FROM AUTHOR]

Nowadays, there is an increasing interest in the exploitation and valorization of agricultural food waste and by-products. At the same time, the growing demand by markets worldwide, especially in Africa and Southeast Asia, can justify the growing interest in the use of by-products for the poultry industry. Olive pulp is one of the most interesting by-products of olive tree farming (typical of the Mediterranean area), being a good source of many biologically active compounds with antioxidant, antifungal, and antibacterial properties. The presence of processed olive pulp in the diet showed to be effective in increasing the weight of specific carcass and offal traits. This work aims at studying olive pulp as a feed supplement in poultry nutrition, by focusing on the effects on broiler carcass and offal. Olive pulp (OP) is one of the by-products of olive tree farming, being the residue of olive cake after it is dried. To evaluate the effects of OP in a diet supplemented with different levels of a commercial enzyme (ENZ) blend on broiler carcass and offal traits, three hundred male broiler chicks (Ross 308 lineage; one-day-old) were divided into ten treatment groups according to a completely randomized design. The treatments diets contained: unprocessed OP (50 g/kg, 100 g/kg, 50 g/kg with ENZ, 100 g/kg with ENZ), processed OP (50 g/kg, 100 g/kg, 50 g/kg with ENZ, 100 g/kg with ENZ), and control groups (without OP, and without OP with ENZ). The OP processing increased breast percentages in broilers. Supplementation with ENZ did not change any of the studied carcass or offal trait values. The presence of OP (50 g/kg) in broiler diets increased the eviscerated carcass, leg, and neck percentage values. The presence of processed OP (50 g/kg) in the diet showed to be effective in increasing the weight of specific carcass and offal traits. [ABSTRACT FROM AUTHOR]