Universidad Nacional Agraria La Molina. Escuela de Posgrado. Doctorado en Nutrición

The present study was carried out to determine the protein requirement in Peruvian grunt juvenile, Anisotremus scapularis. In total, 72 fish weighing 19.95 ± 4.09 g and length of 10.31 ± 0.63 cm were used. They were randomly distributed in groups of six units per tank. The experimental diets contained protein levels of 45, 50, 55 and 58%, which were supplied to three experimental units per diet. The fish were fed three times a day to satiety for a period of 56 days. The results showed that final weight, weight gain, feed intake and feed conversion ratio were significantly (p<0.05) affected by dietary protein levels. However, the increase in size and the specific growth rate did not present significant differences (p>0.05) between treatments. The protein requirement based on weight gain using second degree polynomial regression was 56.78%, for optimal growth of Peruvian grunt juve...

Algae had been part of the human diet for hundreds of years. In Peru, the oldest archaeological evidence of algae was found along the Peruvian coast e.g. in Pampa (ca. 2500 B.C.), in Playa Hermosa (2500-2275 B.C.), small marine algae were also found in the mummies of the Paracas culture, which indicates that marine algae could have been used by the ancient Peruvians to supplement their diets. In Peru, the consumption of algae is increasing caused by the growing interest of consumers for foods with high nutritional value. The aim of this research was to determine the protein quality, vitamins, minerals and amino acids of the algae Ulva lactuca; which is used for human consumption. Protein analysis was made by the Weende method, vitamins and minerals by the AOAC method, the amino acids were determined by the ion exchange method, using an amino acid analyzer, the biological evaluation of th...

El objetivo de la investigación fue determinar la correlación entre el comportamiento higiénico (CH) de Apis mellifera y la infestación de Varroa destructor (TIVA) en 17 colonias de abejas del apiario de la Universidad Nacional Agraria La Molina (UNALM), La Molina, Lima. El CH se determinó por la técnica de perforación de pupas con aguja hipodérmica, y la TIVA a través de la técnica del tamizado. Con el CH y la TIVA se realizó la prueba de correlación de Spearman, al 95 por ciento de confianza, y las colonias de abejas fueron categorizadas de acuerdo al nivel del CH. El promedio del CH alcanzó el 73,2% con un rango de 8,43 a 97,85, mientras que el promedio de la TIVA fue de 4,15% con un rango de 0,34 a 7,49, valores que según el coeficiente de Spearman r = -0,569, (p <0,05) demuestran la existencia de una correlación significativa. Por otro lado, las colonias de abejas ...

l objetivo que se persigue es el de estudiar la viabilidad económica de un proceso de recuperación de productos a partir del suero lácteo generado en queserías artesanales de la sierra del Perú, se pretende revalorizar un hasta ahora considerado residuo industrial mediante su transformación en subproductos alternativos. Se utilizó herramientas de análisis financieros que permitieron identificar y analizar las relaciones y factores financieros, con la finalidad de obtener el análisis económico financiero a partir de los estados contables de industrias lácteas en el Perú. La evaluación económica realizada muestra resultados aparentemente favorables, conllevando ahorro en materias primas en la sustitución de fuentes de proteína como la soja o la leche y beneficios ambientales relacionados con la reducción de emisiones de gases de efecto invernadero y la contaminación de su...

Rosewood (Aniba rosaeodora) is one of the most commercially valuable Amazonian tree species due to the extraction of its essential oil. Its trade is regulated by the Convention on International Trade in Endangered Species of Wild Fauna and Flora (CITES). Historically, it has been threatened by commercial overexploitation to meet the demands of cosmetic markets, mainly in Europe. This research aims to gather primary information on the population of rosewood in areas with known exploitation in Peru, estimating its density and determining its population structure. Data from 111 hectares were analyzed, divided into three sample strips of 1 hectare each (1000 x 10 m), spaced 350 m apart, and randomly distributed in areas with a probable species distribution (>75% probability of occurrence). The densities found were 0.524 individuals per hectare and 0.547 individuals per hectare in Loreto a...

Rosewood (Aniba rosaeodora) is one of the most commercially valuable Amazonian tree species due to the extraction of its essential oil. Its trade is regulated by the Convention on International Trade in Endangered Species of Wild Fauna and Flora (CITES). Historically, it has been threatened by commercial overexploitation to meet the demands of cosmetic markets, mainly in Europe. This research aims to gather primary information on the population of rosewood in areas with known exploitation in Peru, estimating its density and determining its population structure. Data from 111 hectares were analyzed, divided into three sample strips of 1 hectare each (1000 x 10 m), spaced 350 m apart, and randomly distributed in areas with a probable species distribution (>75% probability of occurrence). The densities found were 0.524 individuals per hectare and 0.547 individuals per hectare in Loreto a...

The inclusion of Dandelion meal [DL] (Taraxacum officinale) in the diet of laying hens and its effect on productive performance, intestinal morphology and dry matter content in feces was evaluated. Ninety-six 35-week-old brown Hisex hens were distributed in 6 treatments. Gradual levels of DM meal (1%, 2%, 3% and 4%) were compared with a diet based on the mixture of antibiotics (CAB; 0.03% Zinc bacitracin + 0.03% colistin sulfate) and another based of 0.20% sodium butyrate (CPB). DM and CPB improved egg production (p < 0.05) compared to CAB, but feed consumption and egg weight decreased with the use of 4% DM (p < 0.05), without affecting the feed conversion ratio (p > 0.05). In general, DM (1% - 4%) improved intestinal morphology parameters (p < 0.05). Higher quantity and content of dry matter in feces was observed in 4% DM compared to CAB. The incorporation of up to 3% DM imp...

The oil of debittered and dehulled grains from two Andean lupins (Lupinus mutabilis) from Peru, Andenes and Común, was extracted by expeller press. The extraction yield and the proximal composition of both varieties were assessed. The oil and the cake, as well as the defatted flour from the variety with the highest extraction yield, were characterised for physico-chemical properties, total polyphenol content and antioxidant capacity. The oil shelf-life at 25 °C was extrapolated by Rancimat test. Andenes presented an oil yield of 22.1% (vs. 18.4% of Común), CIELAB colour coordinates of L* = 36.5, a* = 2.2, b* = 20, refractive index and density at 25 ºC of 1.469 and 0.903 g/mL, acid number of 3.2 mg KOH/g, free fatty acids content of 1.6%, peroxide number of 2.7 meqO2/kg, p-anisidine number of 1.3, unsaponificable content of 58%, total antioxidant capacity 21.4 µmol TE/g and total pol...

The oil of debittered and dehulled grains from two Andean lupins (Lupinus mutabilis) from Peru, Andenes and Común, was extracted by expeller press. The extraction yield and the proximal composition of both varieties were assessed. The oil and the cake, as well as the defatted flour from the variety with the highest extraction yield, were characterised for physico-chemical properties, total polyphenol content and antioxidant capacity. The oil shelf-life at 25 °C was extrapolated by Rancimat test. Andenes presented an oil yield of 22.1% (vs. 18.4% of Común), CIELAB colour coordinates of L* = 36.5, a* = 2.2, b* = 20, refractive index and density at 25 ºC of 1.469 and 0.903 g/mL, acid number of 3.2 mg KOH/g, free fatty acids content of 1.6%, peroxide number of 2.7 meqO2/kg, p-anisidine number of 1.3, unsaponificable content of 58%, total antioxidant capacity 21.4 µmol TE/g and total pol...