Examinando por Autor "Garcia Frias, Larry Dustin"

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Mycotoxins, antioxidant capacity, physicochemical and sensory quality of specialty coffees from Cajamarca, Peru
(Elsevier Ltd, 2026-04-28) Sarasara Akuts, Linder; Bobadilla Vásquez, Franklin Amilkar; Fernández Jibaja, Jorge Antonio; Álvarez Robledo, Yeltsin Abel; Garcia Frias, Larry Dustin; Cabrejos Barriga, Jorge B.; Taboada Mitma, Víctor Hujgo; Rojas Briceño, Nilton B.; Huamán Castilla, Nils L.; Mamani Pari, Salome; Cruz Luis, Juancarlos Alejandro; Goñas Goñas, Malluri; Tineo Flores, Daniel
Coffee is a globally important crop with significant economic and social relevance, particularly in the Cajamarca region of Peru, which is recognized for the production of high-quality beans. This study aimed to evaluate the occurrence of mycotoxins in three specialty coffee varieties while simultaneously assessing their physical, sensory, and compositional characteristics. A total of 36 parchment coffee samples were randomly collected from two storage facilities located in the provinces of Jaén and San Ignacio. The results revealed the exclusive presence of aflatoxin G₂, with concentrations varying between storage conditions. The Catimor variety exhibited the highest antioxidant activity and total polyphenol content; however, it showed lower physical yield and reduced sensory scores. In contrast, the Bourbon variety displayed a more balanced profile between bean composition and cup quality, producing a beverage with superior physical and sensory attributes and enriched with bioactive compounds associated with potential health benefits. These findings highlight the relevance of varietal selection, post-harvest management, and storage conditions for maintaining coffee quality. Nevertheless, the detection of aflatoxin G₂ indicates persistent food safety concerns, emphasizing the need for stricter monitoring and control measures during harvesting, drying, storage, and handling to mitigate potential health risks.
Occurrence, sources, and ecological risk of polycyclic aromatic hydrocarbons (PAHs) in rice field soils of northwestern Peru
(Elsevier B.V., 2026-02-04) Culqui Gaslac, Cristian; Tineo Flores, Daniel; Fernandez Jibaja, Jorge Antonio; Alvarez Robledo, Yeltsin Abel; Garcia Frias, Larry Dustin; Mendoza Merino, Jani Elisabet; Taboada Mitma, Víctor Hugo; Cruz Luis, Juancarlos Alejandro; Rojas Briceño, Nilton B.; García, Ligia; Zirena Vilca, Franz; Goñas Goñas, Malluri
Polycyclic aromatic hydrocarbons (PAHs) are organic contaminants that pose significant risks to human health and ecosystems. This study investigated the occurrence, sources, and ecological risks of PAHs in rice paddy soils from northwestern Peru. Ninety-seven soil samples were collected at a depth of 30 cm across three altitudinal zones, four phenological stages, and two agronomic management practices. Quantification was performed using ultra-high-performance liquid chromatography coupled with fluorescence detection (UHPLC-FLD). Source apportionment was conducted through rotated principal component analysis combined with multiple linear regression. Ecological risk was assessed using organic carbon normalization and the mean effects range-median quotient (M-ERM-Q) method, while carcinogenic potential was estimated using the toxic equivalent factor (TEQCARC). Total PAHs ranged from 22.02 to 130.55 ng g⁻¹ (mean: 55.26 ng g⁻¹); LMW PAHs averaged 37.38 ng g⁻¹, exceeding HMW PAHs (17.88 ng g⁻¹). No significant differences were observed among altitudinal zones, phenological stages or agronomic practices (p > 0.05). The predominant sources of PAHs were attributed to vehicular emissions (52.3%), petroleum and biomass combustion (42.1%), and coal combustion (5.4%). Ecological risk assessment revealed low contamination levels below established safety thresholds (CEC <290 μg g⁻¹), consistent with the carcinogenic risk estimated through TEQCARC (0.0083 to 18.7483 ng BaPeq g⁻¹). This study provides the first comprehensive evaluation of PAHs contamination in rice paddy soils in Peru and underscores the influence of altitude and agricultural practices, emphasizing the need for further research on pollution sources, impacts on crop productivity, and potential risks to human health.