Ricardo Carvalho Santos

Phytometal Availability, Evaluation of Antioxidant Activity and Total Phenolic Compounds of Genipa americana L. (Rubiaceae) Fruits

The present work studied the fruits of genipap ( Genipa americana L.) occurring in the city of Boa Vista, Roraima, State, Brazil. The content of the following minerals being evaluated: B, Ca, Cu, Fe, Mg, Mn, Na, P, Zn and their antioxidant activity on pulp, peel, seeds and oil extracted from the seeds. The levels of the minerals present in the different parts of the fruit were analyzed by flame atomic absorption spectroscopy (FAAS), flame atomic emission spectrometry (FAES) and UV-visible spectroscopy (UV/VIS). The mineral with the highest content was the potassium found in the peel (1,248.48±4.59 mg 100 g -1 ). The studies showed that the phenolic compounds are closely related to the antioxidant activity, in this study the peel presented the highest phenolic compounds content 712.21±11.04 mg GAE 100 g -1 and the pulp showed the highest capacity of Capture of the DPPH free radical of 661.34±17.12 EC 50 mg mL -1 , thus the genipap is a fruit with a potential food of the Roraima region.

Physicochemical analysis of the oil of tambaqui fillet (Colossoma macropomum) cultivated in the state of Roraima, Brazil

The objective this work was to realize chemometrics analysis and to determine the physicochemical characteristics of tambaqui fish oil (Colossoma macropomum), grown in four localities in the state of Roraima, Alto Alegre (A), Bonfim (B), Uraricoera (U) and Passarao (P). Obtaining oil tambaqui was through his ground meat, dried in oven air circulation following agitation for one hour. Some physicochemical characteristics were analyzed: acidity index (AI), in oleic acid acidity (OAA), of iodine (II), peroxide (PI), saponification (SI), and refractive index (RI), humidity contents and ashes, melting point, density, viscosity, totals lipids and organics substances soluble in ether. For chemometrics analysis was applied to the multivariate analysis, PCA and HCA. The samples different of the localities were discriminated geographically. The samples U1, U2 and U3 showed highest values for II and RI, B1, B2 and B3 showed the highest values for AI, OAA, SI and PI, P1, P2 and P3 showed lowest values for AI, RI, SI, OAA and PI, the samples A1, A2 and A3 had the highest humidity content, density and viscosity.