The effect of the extraction procedure on the antioxidant capacity of extracts of pequi pulp: aqueous (AQ), alcoholic (ALC) and acetomethyl (AM), obtained respectively by the solvents water, ethanol and methanol followed by acetone, was investigated. Antioxidant action was expressed by the antioxidant capacity coefficient (K) obtained by the electrochemical test (DPV) at different pH values, and in trolox equiv...
The multi-enzyme complex (crude extract) of white rot fungi Pleurotus ostreatus, Pleurotus eryngii, Trametes versicolor, Pycnosporus sanguineus and Phanerochaete chrysosporium were characterized, evaluated in the hydrolysis of pretreated pulps of sorghum straw and compared efficiency with commercial enzyme. Most fungi complexes had better hydrolysis rates compared with purified commercial enzyme.
O objetivo deste trabalho foi caracterizar e avaliar a variabilidade quanto ao teor e perfil de carotenoides nos grãos de 134 genótipos de milho (Zea mays), com vistas à utilização em programas de biofortificação. Os materiais foram provenientes dos campos experimentais e do Banco Ativo de Germoplasma da Embrapa Milho e Sorgo, Sete Lagoas, MG. São cultivares e híbridos comerciais, linhagens-elite e outros acess...
The objective of this work was to optimize the total cellulase activity of the crude extract cocktails from five white rot fungi produced by solid-state fermentation, by means of the central composite design. The white rot fungi Pleurotus ostreatus PLO 06, Pleurotus eryngii PLE 04, Trametes versicolor TRAM 01, Pycnosporus sanguineus PYC 02 and Phanerochaete chrysosporium PC were tested. For optimization process...
O entendimento das necessidades dos clientes e a utilização de tecnologia dos alimentos podem tornar uma ideia em um produto inovador. O objetivo deste trabalho foi estudar, por meio de uma pesquisa de mercado, a oportunidade de um novo produto e, posteriormente, elaborar uma salada de frutas frescas, utilizando técnicas de processamento mínimo com métodos combinados. A pesquisa de mercado foi realizada na regi...
Maize is considered a source of carotenoids; however, these compounds are highly unstable, degraded by high temperatures, exposure to light and presence of oxygen. The objective of this work was to evaluate the influence of the moisture and type of drying applied to grains on the level of carotenoids in yellow maize. The experiment was conducted in a completely randomized design (2 × 4 factorial), two levels of...
O consenso para a definição qualitativa de um alimento não é uma tarefa trivial, entretanto, quando analisada a composição química e sensorial do café, a tarefa se torna ainda mais complexa. Recentes discussões no meio acadêmico retratam os esforços entre as tentativas de convergências entre o emprego de técnicas físicas e químicas em relação ao processo de análise sensorial de cafés especiais, visando entender...
O artigo não contém resumo em português; Agronomic biomass yields of forage sorghum BRS 655 presented similar results to other energy crops, producing 9 to 12.6 tons/ha (dry mass) of sorghum straw. The objective of this study was to evaluate the lignocellulosic part of this cultivar in terms of its potential in the different unit processes in the production of cellulosic ethanol, measuring the effects of pretre...
Conselho Nacional de Desenvolvimento Científico e Tecnológico; Seeking technological alternatives to ethanol, this work studied the production of cellulases by solid state fermentation (SSF), using sorghum straw as substrate and five strains of white rot fungi, Phanerochaete chrysosporium, Pycnoporus sanguineus, Trametes versicolor, Pleurotus eryngii and P. ostreatus. Was also evaluated the straw sorghum, about...
Conselho Nacional de Desenvolvimento Científico e Tecnológico; Vitamin A deficiency is the leading cause of blindness in the world, reaching approximately 21% of all the mal nourished children, with the largest number of affected kids in parts of Asia and Africa. Biofortification of the maize with provitamin A carotenoids, through breeding, is an alternative to diminish this deficiency, mainly in poor countries...