Browsing by Author "Barriga-Sánchez, Maritza Elizabeth"

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Comparative chemical composition and antioxidant capacity of essential oil and oleoresin from Eucalyptus globulus Labill. leaves
(Editorial CSIC, 2025-06-30) Barriga-Sánchez, Maritza Elizabeth; Arpi Anco, Eliud Dennis; Cueva-Martínez, Pedro Miguel; Medina-Cáceres, Erika Amalia; Varas Condori, Miguel Angel
The Eucalyptus globulus is a tree which is cultivated in Peru for its wood, while its leaves are often discarded. This study compared the extraction yield, chemical composition, and antioxidant capacity of essential oil and oleoresin obtained from the leaves. The essential oil was extracted by hydrodistillation (1.62 % yield), and oleoresins were obtained using supercritical CO2, with and without ethanol as a co-solvent (yield up to 8.96 %). GC-MS analysis identified 1,8-cineole as the major compound in the essential oil and in the oleoresin extracted with supercritical CO2+ethanol. The essential oil showed a higher monoterpene content (80.33 %), while the oleoresins were richer in sesquiterpenes (up to 63.68 %). The total phenolic content was significantly higher in the oleoresin (5.05-11.30 mg GAE/g) than in the essential oil (0.25 mg GAE/g). Antioxidant capacity was also significantly higher in the oleoresins. These findings highlight the potential of E. globulus oleoresin as a natural antioxidant for food and pharmaceutical applications.
Modified Tuber Starches as Sustainable Biopolymers for the Encapsulating Bioactive Compounds: A Comprehensive Review
(MDPI AG, 2025-12-07) Samaniego-Rafaele, César; Salvador-Reyes, Rebeca; Quispe-Santivañez, Grimaldo; Barriga-Sánchez, Maritza Elizabeth
Modified tuber starches have gained relevance as innovative and versatile materials for the encapsulation of bioactive compounds, distinguishing themselves from synthetic polymers due to their biocompatibility, biodegradability, and tunable functionality. This review analyzes the effects of physical, chemical, and biochemical modifications on the composition and morphological, rheological, thermal, and techno-functional properties of tuber starches, as well as their development prospects as coating materials in encapsulation techniques such as spray drying, freeze-drying, electrospinning, and emulsification. The evidence reviewed indicates that modified tuber starches exhibit reduced retrogradation, higher thermal resistance, improved solubility, and better digestibility, facilitating their application as protective agents. The main challenges for their industrial implementation are identified and analyzed, including the standardization of processes, scalability, and the ambiguous regulatory framework. In the future, research in this area should be directed toward the optimization of “clean-label” methodologies and the valorization of non-conventional tuber sources, thereby consolidating the development of safer, more effective, and more sustainable encapsulation systems for the food industry.