The objective of this study was to incorporate avocado peel (AEE) and coconut (CEE) extracts as antifungal additive in the development of gelatin and carboxymethylcellulose coatings to extend shelf life in strawberries. Fractions of 200 mg/L of extracts were incorporated in the coating and characterized during storage at 2°C. AEE and CEE in the coating delayed significantly (P < .05) weight loss (40%), softening, color, and compositional changes (°Brix, sugars, titratable acidity). Rhizopus stolonifer and Aspergillus niger strains were isolated and inoculated to evaluate the effectiveness of the coatings on strawberries. The use of the coating + plant extracts decreased the proliferation of fungi by 45% compared to the uncoated fruit and extended the shelf life for 15 days. With these findings, it is suggested that biopolymeric coatings + plant extracts can be used as a potential method of ecological preservation in strawberries against microbial deterioration.

Introduction. Polyphenols have received significant attention in recent years due to their antioxidant capacity and their significant role in disease prevention. Cocoa is one of the major naturally occurring sources of antioxidants, particularly of polyphenolic compounds. Materials and methods. Gelatin nanoparticles loaded with a cocoa-derived polyphenolic extract were synthesized by nanoprecipitation. The nanoparticle synthesis was performed using a central composite experimental design that allowed for the assessment of how gelatin concentration and surfactant concentration (Tween 80) affected the hydrodynamic diameter and polydispersity of the particles. The nanoparticles were characterized using dynamic light scattering (DLS), assessments of zeta potential, scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FT-IR). Results. The analyses demonstrated that the nanoparticles examined exhibited hydrodynamic diameters of (100 to 400) nm, polydispersity indices of less than 0.2 and average zeta potential values of 29–33 mV. SEM images revealed that most nanoparticles were spherical and uniform in morphology, with average sizes less than 250 nm. In vitro experiments in which the 2,2-diphenyl-1-picrylhydrazyl (DPPH) method was used to assess the prevalence of free radical-scavenging ability among these nanoparticles indicated that the loading efficiency for the nanoparticles was approximately 77.56%. Conclusion. Nanoparticles loaded with polyphenolic extract were obtained with average sizes ranging from (120 to 250) nm and largely spheroidal morphologies. Polymer and surfactant concentrations significantly influenced the hydrodynamic diameters and polydispersity indices of the particles. The incorporation of the polyphenolic extract into the polymer matrix enabled the preservation of the antiradical activity of the bioactive compound.

One-fifth of the edible insect species identified worldwide have been documented in Mexico. In states with an entomophagy tradition, insects have been incorporated into the local cuisine. Results show that the country has a wide diversity of climates and vegetation; thus, each state has its own set of edible insects. This narrative review aims to determine the current state of entomophagy in Mexico, divided into two segments: wild-collected insects, and farmed insect products, and to identify the current trends, both in research and in commercial products available. Wild-gathered insects are mostly purchased at local marketplaces, with prices varying widely, depending on the insect and the sales point. Increased demand for wild edible insects, and the loss of natural habitat, have put some insect species at risk of extinction. Since whole edible insects are wild-gathered and commercialised whole in traditional markets, there are currently no specific mandatory standards for food products containing insects as ingredients. Alongside traditional wild insect activities, there is a fledgling industry of farmed edible insect products which can be purchased online. In conclusion, while the wild-gathered edible insect market is well established, a farmed insect products market is developing, with manufacturers incorporating insect flour into food products where the insect element is inconspicuous, seeking to appeal to a wider range of consumers, yet most recent academic research focuses on wild edible insect species, with a near absence of research articles on the farmed insect species. The insect food product industry would benefit from a closer collaboration with the academic research sector. Furthermore, the lack of a specific regulation for manufacturing insect food products constitutes a disadvantage for firms seeking to export to countries with stricter regulations. Also, with the food safety concerns inherent in wild-gathered insect consumption, studies focusing on the sanitary aspects of entomophagy are insufficient.