The objective of this study was to compare the effects of the incorporation of microcapsules or nanoemulsions with Opuntiaoligacantha on the quality of fresh cheese. Three treatments were established: Control, cheese with microcapsules (Micro), and cheese with nanoemulsion (Nano). The parameters evaluated were physicochemical (moisture, ash, fat, proteins, and pH), microbiological (mesophilic aerobic bacteria, mold–yeast, and total coliforms), functional (total phenols, flavonoids, and antioxidant capacity), and texture (hardness, elasticity, cohesion, and chewiness) during storage for 45 days at 4 °C. The results showed that adding microcapsules and nanoemulsion did not affect the physicochemical parameters of the cheese. Total coliforms decreased in all samples from the first days of storage (Control: 4.23 ± 0.12, Micro: 3.27 ± 0.02, and Nano: 2.68 ± 0.08 Log10 CFU), as well as aerobic mesophiles and mold–yeast counts. Regarding the functional properties, an increase in total phenols was observed in all treatments. The texture profile analysis showed that the addition of microcapsules and nanoemulsion influenced hardness (Control: 8.60 ± 1.12, Micro: 1.61 ± 0.31, and Nano: 3.27 ± 0.37 N). The antimicrobial effect was greater when nanoemulsions were added, while adding microcapsules influenced the antioxidant activity more positively.
Coeliac disease has recently attracted interest in food science research. In search of gluten-free (GF) bread with good quality and nutritional value, several sources have been used in the formulation of GF composite flours. The goal of the present work was to study the textural and physical properties as well as the nutritional and sensory characteristics of GF Danish bread made with composite flour based on a mixture of flours and starches. First, we identified the optimal GF formulation by experimental orthogonal design. Regarding bread quality, optimisation of the doughs positively affected the textural and physical parameters of the bread. Moreover, some nutritional values were improved by increasing the ash and slowly digestible starch, and these breads had higher total phenol content and antioxidant capacity. In sensory analysis, the optimized breads received higher scores for flavour, aroma and overall acceptance attributes from the panellists.
Highlights
The ultrasound can release of bioactive compounds of the crystallized matrix of honey.
Some honeys liquefied with ultrasound showed increases in the bioactive compounds.
The treatment with ultrasound increased inhibitory effect against
S. Typhimurium
in some honeys.
Over the past decade, consumers have demanded natural, completely biodegradable active packaging serving as food containers. Bioactive plant compounds can be added to biopolymer-based films to improve their functionality, as they not only act as barriers against oxidation, microbiological, and physical damage, they also offer functionality to the food they contain. A water-in-oil (W/O) nanoemulsion was produced by applying ultrasound to xoconostle extract and orange oil, and was incorporated into gelatine films in different proportions 1:0 (control), 1:0.10, 1:0.25, 1:0.50, 1:0.75, and 1:1 (gelatine:nanoemulsion). The nanoemulsions had an average size of 118.80 ± 5.50 nm with a Z-potential of −69.9 ± 9.93 mV. The presence of bioactive compounds such as phenols, flavonoids, and betalains in the films was evaluated. The 1:1 treatment showed the highest presence of bioactive compounds, 41.31 ± 3.71 mg of gallic acid equivalent per 100 g (GAE)/100g for phenols, 28.03 ± 3.25 mg of quercetin equivalent per 100 g (EQ)/100g flavonoids and 0.014 mg/g betalains. Radical inhibition reached 72.13% for 2,20-azino-bis-3-ethylbenzothiazoline-6-sulphonic acid (ABTS), and 82.23% for 1,1-diphenyl-2-picrylhydrazyl (DPPH). The color of the films was influenced by the incorporation of nanoemulsions, showing that it was significantly different (p < 0.05) to the control. Mechanical properties, such as tensile strength, Young’s modulus, and percentage elongation, were affected by the incorporation of nanoemulsified bioactive compounds into gelatine films. The obtained films presented changes in strength and flexibility. These characteristics could be favorable as packaging material.
The acid fruit of the "xoconostle" cactus belongs to the genus Opuntia family of cacti. It is used as a functional food for its bioactive compounds. Several studies reported that xoconostle fruits have a high amount of ascorbic acid, betalains, phenols, tannins, and flavonoids. These compounds confer antioxidant, antibacterial, anti-inflammatory, and hepatoprotective gastroprotective activity. Xoconostle fruit extracts were tested by in vitro assays where the digestion conditions were simulated to measure their stability. At the same time, the extracts were protected by encapsulation (microencapsulation, multiple emulsions, and nanoemulsions). Applications of encapsulated extracts were probed in various food matrices (edible films, meat products, dairy, and fruit coatings). The xoconostle is a natural source of nutraceutical compounds, and the use of this fruit in the new food could help improve consumers’ health.
Oxalis tuberosa (Ot) is a tuber of Andean origin used mainly for home consumption. The combination of flours and starches used for the production of gluten free products intended mainly for people with celiac disease. The texture properties of dough and bread are measured in the rheological tests texture profile analysis (TPA) and extensibility. Found that increased hardness parameter in the gluten-free dough compared to wheat flour increasing as pregelatinized Oxalis tuberosa (OtP) was added, contrary to the cohesiveness and springiness, diminishing and affected the quality of the final product structure and volume. The treatment supplemented with 10% (T2) of OtP was the one that took a closer control made with wheat flour (TTR) improved behaviour and properties of gluten-free controls (TGF) presenting a lower hardness and cohesiveness more. In the affective sensory evaluation were no significant differences (P> 0.05) between TTR and T2 were found.
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