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The present work aimed to evaluate the contents of total phenolic compounds, total flavonoids and antioxidant activity, as well as to identify and quantify phenolic acids before and after simulated gastrointestinal digestion in vitro, in raw and cooked cowpea grains, of biofortified cultivars BRS Aracê and BRS Tumucumaque. The raw grains were analyzed as flour and the cooked grains were analyzed after maceration, before and after cooking and in the stages of the digestive process. The contents of total phenolic compounds were analyzed by the spectrophotometric method, using the reagent Folin-Ciocalteu, and total flavonoids using a spectrophotometric method with quercetin as standard. Made available in DSpace on 2021-05-18T14:27:39Z (GMT). No. of bitstreams: 1 In-vitro7191-35576-1-PB.pdf: 164245 bytes, checksum: d801c58363c226658614a3b3559dcfa9 (MD5) Previous issue date: 2021

Cheese bread presents great acceptance and market expansion. Due to the lack of standardization in its manufacturing, various ingredients can be added. It was aimed to determine the content of minerals, bioactive compounds and antioxidant activity in cheese bread enriched with biofortified cowpea. Two formulations were prepared, standard cheese bread (without cowpea) and enriched cheese bread. The minerals were analyzed using the plasma emission spectrometry technique with inductive coupling, phenolic compounds and antioxidant activity were determined by spectrophotometry and the amines by High Performance Liquid Chromatography. All analyzes were performed in triplicate and for the comparison of the means between two variables, Student?s t-test was applied and for multiple comparisons, the Tukey test. It was observed that the enriched cheese bread is source of copper, zinc and sodium and presents high content of calcium, phosphorus and magnesium, considering the recommendations for the children?s audience. The concentrations of total phenolics, flavonoids and condensed tannins increased significantly with the introduction of cowpea. It was also observed an significant increase of spermidine, cadaverine and agmatine. The antioxidant activity was statistically higher in enriched cheese bread. It is concluded, therefore, that cheese bread with cowpea contributes to the supply of minerals and bioactive compounds. Made available in DSpace on 2019-12-31T00:38:13Z (GMT). No. of bitstreams: 1 Cavalcanteetal2019.pdf: 556007 bytes, checksum: 9f940613cf698f444de8bba4cf17abc2 (MD5) Previous issue date: 2019

Flour production through milling is an alternative for the cowpea processing, when the aim is to obtain a product with higher added value. The objective of this work was to determine the chemical composition, the granulometry, and evaluate the microbiological characteristics of whole-bean flours from five cowpea cultivars (BRS Cauamé, BRS Guariba, BRS Xiquexique, BRS Novaera and BRS Itaim)... Made available in DSpace on 2018-01-05T23:22:22Z (GMT). No. of bitstreams: 1 RevistaCaatinga31n1p217.pdf: 552937 bytes, checksum: a4096fc000f9cb252ce16363d1c697af (MD5) Previous issue date: 2018-01-05

CNPq - Conselho Nacional de Desenvolvimento Científico e Tecnológico CAPES - Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - O presente estudo visou avaliar a influência do cozimento no conteúdo de compostos bioativos e atividade antioxidante nos grãos de cultivares de feijão-caupi. As análises foram realizadas em cultivares cruas e após o cozimento em panela de pressão doméstica. Para os compostos bioativos, o grão da cultivar BRS Aracê apresentou os maiores conteúdos de compostos fenólicos totais antes (205,10 mg/100 g + 2,89) e após (150,62 mg/100 g + 2,64) o cozimento (p

The cowpea (Vigna unguiculata (L.) Walp.) is one of the most widely consumed legumes in the North and Northeast of Brazil, representing an important source of protein, energy, fibre and minerals, in addition to generating employment and income. The aim of this study was to determine the chemical composition, and the effect of thermal processing on the green grain from biofortified cowpea cultivars. Samples of green grain from four cowpea cultivars were analysed, only one not being biofortified (standard). Centesimal composition and total energy value (TEV) were determined before and after thermal processing. The mean values of the characteristics under evaluation were compared by Student's t-test and Tukey's test (.

Cowpea grain is noteworthy due to its functional properties, which are probably a result of the synergistic action of its nutrients and bioactive compounds. Since these compounds undergo the effects of thermal processing, the aim of the present study was to verify the influence of cooking on the total polyphenol content of the grain of cowpea cultivars. Samples were obtained from the experimental area of Embrapa Meio-Norte, located at 5°5' S and 42°48' W, at an altitude of 72 metres. Meal (0.5 mesh) resulting from the raw grain being ground in a cyclone rotor mill (Tecnal model TE-651/2-T), and cooked beans (with no maceration, at a bean to water ratio of 1:5 (w/v), cooked in a domestic pressure cooker (2 L) for 780 seconds) were stored in airtight containers under refrigeration (8 °C) for analysis, which was carried out in triplicate. Total phenolic content was determined by spectrophotometry (λ = 765 nm), using Folin-Ciocalteau reagent. The total phenolic content, mg GAE (gallic acid equivalent)/100g, in the raw grain of the BRS Marataoã, BR 17-Gurguéia, BRS Itaim, BRS Cauamé and BRS Guariba cultivars was 295.23, 255.67, 132.32, 98.14 and 89.43 respectively. After cooking, the content was 405.87, 255.4, 161.71, 127.79 and 111.92 respectively, considering both grain and broth. This rise may have been the result of increased solubilisation and extraction of the compounds, due to the softening or rupture of the plant cells. It was concluded that, considering both grain and broth, the total phenolic content increased after cooking; the BRS Marataoã and BR 17-Gurguéia cultivars showed the highest levels. RESUMO Os grãos de feijão-caupi se destacam devido suas propriedades funcionais, provavelmente, pelas ações sinérgicas dos seus nutrientes e compostos bioativos. Visto que estes compostos sofrem efeitos do processamento térmico, o presente trabalho objetivou verificar a influência da cocção no conteúdo de polifenóis totais em grãos de cultivares de feijão-caupi. As amostras foram provenientes do campo experimental da Embrapa Meio-Norte, que está a 72 metros de altitude, 5° 5' de Latitude Sul e 42° 48' de Longitude Oeste. As farinhas (0,5 mesh) resultantes dos grãos crus moídos em moinho rotor tipo ciclone (Tecnal modelo TE-651/2-T) e os grãos cozidos (sem maceração em uma proporção feijão:água de 1:5 (p/v) em panela de pressão doméstica (2 L), durante 780 segundos) foram armazenados em embalagens herméticas sob refrigeração (8 °C) até o momento das análises, realizadas em triplicata. O conteúdo de fenólicos totais foi determinado espectrofotometricamente (λ= 765 nm), utilizando-se reagente Folin-Ciocalteau. Os teores de fenólicos totais, mg GAE (equivalente a ácido gálico)/100g, nos grãos crus das cultivares BRS Marataoã, BR 17 - Gurguéia, BRS Itaim, BRS Cauamé e BRS Guariba foram 295,23; 255,67; 132,32; 98,14 e 89,43, respectivamente. Após a cocção, esses teores foram 405,87; 255,4; 161,71; 127,79 e 111,92, respectivamente, considerando-se grãos mais caldo. Este incremento pode ser resultado do aumento na solubilização e extração desses compostos, em virtude do amolecimento ou rompimento das células vegetais. Concluiu-se que após o cozimento os teores dos fenólicos totais aumentaram considerando-se grãos mais caldo; as cultivares BRS Marataoã e BR 17 - Gurguéia apresentaram os maiores teores.

This study aimed to determine the effect of cooking on the centesimal compositions, the content of bioactive compounds, and antioxidant activities in beans of the cowpea cultivars. The beans were cooked without soaking (1:5 w/v) in a pressure cooker for 780 seconds...