Banca de QUALIFICAÇÃO: DARLISSON SLAG NERI SILVA

Uma banca de QUALIFICAÇÃO de DOUTORADO foi cadastrada pelo programa.
DISCENTE: DARLISSON SLAG NERI SILVA
DATA: 08/08/2023
HORA: 14:30
LOCAL: Auditório do Programa de Pós-Graduação em Química
TÍTULO: Investigation of the chemical composition of fruits from Brazilian Cerrado
PALAVRAS-CHAVES: cerrado fruits, minerals, bioactive compounds, principal component analysis
PÁGINAS: 43
GRANDE ÁREA: Ciências Exatas e da Terra
ÁREA: Química
RESUMO:

Cerrado is the world's largest savannah and one of Brazil's richest biomes in terms of biodiversity. In that regard, several species of plants arouse the scientific community's interest due to their fruits' nutritional potential. Although these fruits are little commercialized and still need to be part of the diet of most of the population, they are excellent sources of nutrients. Therefore, this work aims to investigate the nutritional composition of the fruits of the Brazilian cerrado: buriti (Mauritia flexuosa), pequi (Caryocar brasiliense), murici (Byrsonima crassifólia), guabiraba (Campomanesia xanthocarpa), tucum (Astrocaryum aculeatum) and tuturuba (Pouteria macrophylla). For macronutrients, murici and buriti stand out, with the highest total concentrations of Ca (69.1 and 56.0 mg/100g), Fe is more abundant in tuturubá (29.6 mg/100g), while total K varies between 155.2 and 425.1 mg/100g (pequi and murici) tucum stands out as a source of Mg, P and S (46.7, 29.5, 55.1 mg/100g), Mn was the element in the lowest total concentration, below the limit of quantification for pequi, tuturubá and murici. Bioaccessibility, performed in vitro, showed an average range of variation from 28.4 to 37.7% (K and Ca) concerning the total mineral content, where the global bioaccessible average was 33.9% of the total concentration. The dialyzable fraction (bioavailable concentration) showed a more irregular behavior, with average percentage contents ranging from 7.6 to 20.3% (Mg and Ca). With regard to phenolic compounds, the highest concentration was found in tucum and murici (1640.8 and 1439.3 mg GAE/100g), but pequi and guabiraba had the lowest (410.9 and 467.5 mg GAE/100g). Buriti, known for its high carotenoid content, in this study, presented 781 ± 5 µg g^-1 of total carotenoids; tuturubá, whose carotenoid content was not yet known, presented a content of 204 ± 13 µg g^-1, close to that of pequi (211 ± 9 µg g^-1), more widely studied. In addition, tuturubá and pequi are good protein sources (139.7 and 124.7 mg g^-1) and fiber (38.7 and 33.4%). The highest percentages of lipids were observed for pequi and buriti (60.6 and 50.4%). Principal Component Analysis was performed to confirm whether any sample had a degree of similarity. Total, accessible, and dialyzable potassium, carotenoids, and fiber concentrations were the variables that most influenced PC1 (37.7%). These variables differentiate the pequi and buriti samples from the others studied. These results highlight the importance of cerrado fruits as valuable sources of nutrients, which suggests their potential as functional ingredients and health promoters. Valuing and encouraging the consumption of these native fruits can contribute to diversifying the diet and preserving the biodiversity of the cerrado.

MEMBROS DA BANCA:
Presidente - 1635927 - EDIVAN CARVALHO VIEIRA
Interno - 2350685 - BENEDITO BATISTA FARIAS FILHO
Externo ao Programa - 236.101.088-78 - MAHENDRA KUMAR RAI - SGB
Externo à Instituição - MARCOS YASSUO KAMOGAWA - USP ESALQ