Avalia??o de diferentes linhagens de soja preta quanto as suas caracter?sticas f?sico-qu?mica, nutricionais e compostos bioativos

• Ano de defesa: 2015
• Autor(a) principal: Pereira, Joana de Novais
• Orientador(a): Godoy, Ronoel Luiz de Oliveira
• Banca de defesa: Galdeano, Melicia Cintia, Carvalho, Carlos Wanderlei Piler de
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal Rural do Rio de Janeiro
• Programa de Pós-Graduação: Programa de P?s-Gradua??o em Ci?ncia e Tecnologia de Alimentos
• Departamento: Instituto de Tecnologia
• País: Brasil
• Palavras-chave em Português: Glycine max; composi??o centesimal; compostos fen?licos; atividade antioxidante
• Palavras-chave em Inglês: Glycine max; chemical composition; phenolic compounds; antioxidant activity
• Área do conhecimento CNPq: Ci?ncia e Tecnologia de Alimentos
• Link de acesso: https://tede.ufrrj.br/jspui/handle/jspui/4191

The soybean with black coat (Glycine max (L.) Merrill) is attracting great interest to consumers and researchers because its consumption is associated with benefits to human health, in part associated with the presence of secondary metabolites, mainly isoflavones and anthocyanins. Embrapa has different strains of black soybeans that need to be assessed not only in relation to their agronomic characteristics, but also suitable for human consumption. Therefore, this study aimed to evaluate and compare four different strains of black soybean developed by Embrapa as the chemical composition, antinutritional factors, content and profile of isoflavones, anthocyanins, amino acids, carotenoids and antioxidant activity measured by DPPH method and ABTS. In respect to composition, there was no statistical difference (p> 0.05) between the protein (41.15 to 41.69 g/100) and moisture (from 10.41 to 10.61 g/100 g) in four soybean lines, while the ether extract values (19.12 to 19.79 g/100 g), carbohydrates (33.38 to 34.22 g / 100g) and ash (5.13 to 5.81 g / 100g ) varied statistically. The BRM11-51400 was the lineage with the most significant result for mineral as it showed the highest potassium content (2372.89 mg / 100g), most abundant mineral in all samples, phosphorus (753.56 mg / 100g ), magnesium (255.32 mg / 100 g) and calcium (257.82 mg / 100). It was also determined the concentration of manganese, zinc, copper, cobalt, selenium, iron and aluminum in significant amounts (9.04 to 11.52 mg / 100g). The higher sucrose content (6.46 g / 100 g) and raffinose (1.56g / 100g) was observed in BRM90-50901 while BRM11-51400 was the strain with the highest concentration of stachyose (5.24g /100g). Phytate varied from 11.91 to 14.88 mg / 100g, respectively. In relation to bioactive compounds, the BRM09-50995 lineage showed the highest levels of total monomeric anthocyanins, total isoflavones and carotenoids. In all three soybean linages monomeric anthocyanins were identified: cyanidin-3-O-glucoside, majority profile in all samples (262.27 to 720.45 mg / 100g), delphinidin-3-O-glucoside (184.41 to 316.72 mg / 100g) and petunidin-3-O-glucoside (6.34 to 153.06 mg / 100g). The isoflavones daidzein, glycitin, genistein were also identified at higher levels, and their aglycone forms, daidzein, glycitein and genistein. It was not found statistically significant difference between the total isoflavone content in BRM09-50995 linage (138.65 mg / 100 g) and BRM11-51400 (140.75 mg / 100 g), which had the highest content of this compound. The greater the DPPH antioxidant activity was observed in BRM09-50995 (1072.92 g / g DPPH), while BRM11-51400 showed the most significant results when used in the method of ABTS radical. Based on the results obtained in this study, it was found that the four soybean lineages are suitable for human consumption.