Browsing by Author "Pariona-Velarde, Daniel"

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Cambios sensoriales, químicos y microbiológicos durante el almacenamiento de manto de calamar gigante (Dosidicus gigas) a 0 y 5°C
(Universidad Nacional Mayor de San Marcos, Vicerectorado de Investigacion, 2022-10-27) Pariona-Velarde, Daniel; Barriga-Sánchez, Maritza
El objetivo del estudio fue evaluar los cambios sensoriales, químicos y microbiológicos en manto de calamar gigante (Dosidicus gigas) con piel (CP) y sin piel (SP) almacenados en hielo (0 ± 1 ºC) por 19 días y en refrigeración (5 ± 1 ºC) por 8 días. La evaluación química se realizó mediante el análisis de nitrógeno de trimetilamina (N-TMA), nitrógeno de bases volátiles (N-BVT), relación de hipoxantina/adenosina monofosfato (Hx/AMP), pH, aminas biogénicas, y la evaluación microbiológica mediante el recuento de bacterias mesófilas, psicrófilas y enterobacterias. Las características sensoriales evaluadas fueron olor (crudo y cocido), sabor, textura y aceptabilidad general. Se utilizó el Análisis de Componentes Principales (ACP) y la Correlación de Pearson (p<0.05) para encontrar la asociación entre el deterioro sensorial y los análisis químicos o microbiológicos. Se concluye que los análisis Log(Put+Cad+Hist), Log (Psicrófilos) y Log. (Mesófilos) serían los adecuados para describir los cambios en el manto de calamar gigante almacenados a 0 y 5 °C.
Determinación de plomo, cadmio, mercurio y Bases Volátiles Nitrogenadas Totales (NBVT) en el músculo de tiburón azul Prionace glauca procedente de la zona sur del Perú
(Universidad de Valparaiso Chile, 2020-1-17) Reátegui-Quispe, Andrés; Pariona-Velarde, Daniel
Blue shark Prionace glauca is one of the most important elasmobranch species landed and consumed in Peru. Due to its importance as fishery resource, were evaluated lead (Pb), cadmium (Cd), mercury (Hg) and Total Volatile Base Nitrogen (TVBN) in the muscle tissue of 25 specimens, captured in the southern zone of Peruvian sea. These analytes were compared with current regulations and were determined its relationship with sex and total length (TL). We obtained ranges between 0.04-0.25, 0.01-0.04 and 0.09-0.50 mg kg-1 for Pb, Cd and Hg, respectively. TVBN values were between 38.50-94.60 mg TVBN 100 g-1. Analytes did not have differences with TL and gender. Pb was positive correlation with TL, while the Cd, Hg and TVBN did not. This study provides sanitary information of blue shark muscle from Peruvian waters.
Evaluación biológica, fisicoquímica y de potencial tecnológico del tiburón azul (Prionace glauca) procedente del pacifico sur peruano
(Universidad Nacional Mayor de San Marcos, Vicerectorado de Investigacion, 2024-2-29) Pariona-Velarde, Daniel; Reátegui-Quispe, Andrés
El objetivo del estudio fue evaluar las características biológicas, fisicoquímicas y tecnológicas relacionadas del tiburón azul Prionace glauca. Se trabajó con 128 especímenes para determinar sus propiedades biológicas, tecnológicas y 27 ejemplares para sus características fisicoquímicas. Se registraron los datos biométricos de longitud y peso (142 a 281 cm y 10.5 a 93.0 kg para machos; 153.5 a 255.0 cm y 14.5 a 80.0 kg para hembras), índice de alometría (machos 3.27 y hembras 2.87), potencial tecnológico mediante diferentes tipos de rendimientos (RED: 83.9±0.03%, RESV: 67.2±0.04%, RSCV: 48.9±0.07% y RPC: 33.5±0.07%) y capacidad de retención de agua en el músculo (16.1±0.03%). Dentro de las características fisicoquímicas se analizó la composición química proximal (proteína 21.8±0.23; grasa 0.6±0.03; humedad 78.0±0.31; ceniza 1.3±0.01) y los minerales (Cu: 2.0±0.11 mg/kg, Fe: 17.8±1.95 mg/kg, Zn: 25.8±1.76 mg/kg; Ca: 4.3±0.27 mg/100 g, Mg: 95.4±7.87 mg/100 g, Na: 716.3±24.03 mg/100 g, K: 1526.1±54.4 mg/100 g, P: 439.5±15.76 mg/100 g). No hubo evidencia de diferencias significativas en función al sexo. Con base a las comparaciones realizadas con bases de datos de recursos pesqueros, el músculo de tiburón azul no presenta ventajas comparativas relativos al rendimiento, perfil mineral o composición química proximal de otras especies.
Physicochemical comparison of aqueous extracts from Peruvian coffee husks (Caturra, Catimor and Geisha) varieties
(Coffee Science, 2023) Yoselyn Puñez Yance, Maciela; Chuquipiondo Peréz, Grover; Estela Ayala Galdos, María; Pariona-Velarde, Daniel
The study aimed to determine and compare the physico-chemical characteristics of coffee husks aqueous extracts corresponding to three Peruvian varieties of Arabica coffee: Caturra, Catimor and Geisha. Each sample was dehydrated at 45 °C for 10 hours, ground, sieved and dissolved in 2.5% w/w water. Aqueous extracts were obtained and analyzed for pH, total solids (TS), whiteness index (WI), reducing sugars (RS), total phenols (TP) and reducing power (RP) for the antioxidant activity The influence of coffee varieties, particle sizes (0.097, 0.033, and 0.0139in) and extraction temperaturas (60 and 80 ºC) on the physicochemical characteristics of their corresponding extracts was determined by factorial analysis. Correlation between TP and RP was significant while RS and TP showed an inverse relationship. Cluster values indicate similarity between Geisha extracts at 60 and 80 °C and the corresponding Catimor extracts at 80 °C. Differences were observed between the Catimor extracts at 60 °C and Caturra at 60 and 80 °C. Based on these results, the extracts ex-hibit distinctive intrinsic characteristics. The Caturra extracts at 60 °C showed the highest antioxidant capacity, while the Catimor extracts at 60 °C or 80 °C exhibited the highest WI (water holding capacity) and pH values. Additionally, the Geisha extracts displayed the highest amount of RS (reducing sugars). These findings are of utmost significance for the development of novel products using Peruvian coffee husks, encompassing beverages, concentrated juices, and the enhancement of coffee quality offered in coffee shops. These developments can be guided by the physicochemical characteristics obtained in this study. © 2023 Elsevier B.V., All rights reserved.
Seasonal effects on proximal composition of male and female giant squid (Dosidicus gigas) and its rheological properties of surimi
(Informa UK Limited, 2017-04-10) Albrecht-Ruiz, Miguel; Yupanqui-Galindo, Gladys; Solari-Godiño, Armando; Pariona-Velarde, Daniel
Giant squid adults of both sexes were used in different seasons. Grounded meat of each one were used to determine proximate composition, ammoniacal nitrogen, trimethyl amine contents, and viscosity. Simultaneously, surimi was prepared from each specimen to measure its gel strength. The moisture and protein values were between 81.2–86.9 and 10.5–16.4% respectively. They showed significant variations during summer in both sexes. The moisture: protein ratio was significantly lower in summer, showing greater variability among males. When protein is transformed to a dry basis, differences between sexes are observed in winter and spring. Ammonia nitrogen was about 310.0 mg% and trimethylamine content was below 3.0 mg%. The apparent viscosity and gel strength values were significantly lower during winter, presenting males the lowest average values. © 2021 Elsevier B.V., All rights reserved.
Use of the sludge obtained from the electrocoagulation process of pumping waters of fishmeal factories for feeding Tenebrio molitor larvae
(Elsevier BV, 2023-5) Aguilar-Ascón, Edwar; Pariona-Velarde, Daniel; Loayza-Muro, Raúl; Albrecht-Ruíz, Miguel
Sludge residue from pumping water treatment obtained by electrocoagulation process (LEC) in fishmeal factories, was used as a feeding ingredient for Tenebrio molitor larvae. LEC was conditioned by three bioprocesses: fermentation with Lactobacillus casei, fermentation with Sacharomyces, and hydrolysis with pancreatin enzymatic mixture. Soybean isolate was used as a control. Larvae consuming LEC-containing diets presented a higher weight gain rate than the controls. The proximal larvae dry basis composition values of fat, ash, and protein (37.2% ± 2%, 3.9% ± 0.4%, and 50.2% ± 4.9%, respectively) did not present significant intergroup differences. LEC contained 4.2% aluminum and its conditioning through fermentation with lactic bacteria reduced its bioavailability in the larvae, with values similar to those of controls (3.9 ± 0.7 μg Al/g). The iron content in LEC-fed larvae was higher than that in the control group, while their fatty acid profile was only slightly different. These initial results with LEC, which organic material is difficult to hydrate and assimilate, suggest its suitability as a protein source and attractant for a faster growth of T. molitor larvae. © 2023 Elsevier B.V., All rights reserved.