9 resultados para Cassava flour wastewater
Resumo:
2009
Resumo:
The physical, chemical and pasting properties of the flour and isolated starches from six different bean cultivars (Phaseolus vulgaris L.) were investigated in order to obtain information for application in new products. The protein and total starch contents of the bean flours ranged from 17.72 to 20.27% and from 39.68 to 43.78%, respectively. The bean starches had low amounts of proteins, lipids and ash and showed an amylose content ranging between 45.32 and 51.11% and absolute density values between 1.55 and 1.78 g.cm?3. The bean starch granules were round to oval with a smooth surface. Results viscoamylographic profiles of the starches and flours showed the possibility of selecting cultivars for specific applications according to these characteristics.
Resumo:
2016
Resumo:
2016
Resumo:
Este relato descreve a experiência realizada por meio de uma parceria entre o Projeto Rio Pardo, da Embrapa Cerrados e a Escola Politécnica/USP, visando inserir a questão do trabalho agrícola familiar nas ações desenvolvidas junto aos agricultores de três comunidades de Rio Pardo de Minas/MG, produtoras de frutos do cerrado, goma/farinha de mandioca e café sombreado. O objetivo foi levantar possíveis demandas ergonômicas existentes nestas unidades de produção, que estão implantando agroindústrias familiares para realizar o beneficiamento da produção. As demandas relacionam-se a problemas com a produção, a organização do trabalho e a saúde dos trabalhadores. Percebe-se a coexistência do saber tradicional, transmitido entre gerações, com a inovação em termos de maquinário e instalações. Há diversos arranjos produtivos presentes, fruto da criatividade e sabedoria aplicada dos agricultores. Estas inovações podem ser o embrião de projetos futuros de novos maquinários e arranjos produtivos. Trata-se de fazer comunicar dois saberes, dos projetistas e dos usuários, contribuindo para que estes últimos possam ser empoderados no papel de criadores de inovações, contribuindo para a incorporação de aspectos ergonômicos na evolução dos equipamentos e instalações. Abstract: This report describes the experience carried out through a partnership between Project ? Rio Pardo ?, Embrapa Cerrados/DF and the Polytechnic School of USP, in order to put the issue of family farm labor in the actions developed by farmers in three communities of Rio Pardo de Minas, north of Minas Gerais. The main products are fruits of the cerrado, cassava starch and manioc flour and shaded coffee. The initial goal was to raise possible these existing ergonomic demands of family farming units, which are in the process of implementation of family agri-industries to undertake the processing and beneficiation production. The ergonomic demands are related to production problems with the organization of work and the health of farm workers. In preliminary analyzes, it was possible to perceive the coexistence of traditional knowledge transmitted between generations, with innovation in terms of machinery and facilities. There are several productive arrangements, result of creativity and knowledge of farmers. These innovations, developed by who performs the work, may be the starting point for future designs of new machinery and productive arrangements. It could demonstrated the importance of communication between two knowledge, from the designers and from the users (farmers), contributing to the latter to be empowered in their role as creators of innovation and contributing to the incorporation of ergonomic aspects in the context of setting up their equipment.
Resumo:
2016
Resumo:
ABSTRACT: BACKGROUND: Cassava (Manihot esculenta Crantz) storage root provides a staple food source for millions of people worldwide. Increasing the carotenoid content in storage root of cassava could provide improved nutritional and health benefits. Because carotenoid accumulation has been associated with storage root color, this study characterized carotenoid profiles, and abundance of key transcripts associated with carotenoid biosynthesis, from 23 landraces of cassava storage root ranging in color from white-to-yellow-to-pink. This study provides important information to plant breeding programs aimed at improving cassava storage root nutritional quality. RESULTS: Among the 23 landraces, five carotenoid types were detected in storage root with white color, while carotenoid types ranged from 1 to 21 in storage root with pink and yellow color. The majority of storage root in these landraces ranged in color from pale-to-intense yellow. In this color group, total ß-carotene, containing all-E-, 9-Z-, and 13-Z-ß-carotene isomers, was the major carotenoid type detected, varying from 26.13 to 76.72 %. Although no ?-carotene was observed, variable amounts of a ?-ring derived xanthophyll, lutein, was detected; with greater accumulation of ?-ring xanthophylls than of ß-ring xanthophyll. Lycopene was detected in a landrace (Cas51) with pink color storage root, but it was not detected in storage root with yellow color. Based on microarray and qRT-PCR analyses, abundance of transcripts coding for enzymes involved in carotenoid biosynthesis were consistent with carotenoid composition determined by contrasting HPLC-Diode Array profiles from storage root of landraces IAC12, Cas64, and Cas51. Abundance of transcripts encoding for proteins regulating plastid division were also consistent with the observed differences in total ß-carotene accumulation. CONCLUSIONS: Among the 23 cassava landraces with varying storage root color and diverse carotenoid types and profiles, landrace Cas51 (pink color storage root) had low LYCb transcript abundance, whereas landrace Cas64 (intense yellow storage root) had decreased HYb transcript abundance. These results may explain the increased amounts of lycopene and total ß-carotene observed in landraces Cas51 and Cas64, respectively. Overall, total carotenoid content in cassava storage root of color class representatives were associated with spatial patterns of secondary growth, color, and abundance of transcripts linked to plastid division. Finally, a partial carotenoid biosynthesis pathway is proposed.
Resumo:
Toxicidade de manipueira de mandioca e erva-de-rato a adultos de Toxoptera citricida Kirkaldy.
Resumo:
Starches are applied in several fields of industry. Amylose and amylopectin (natural polymers) constitute the starch in vegetable cells. In some processes native starches cannot support high stress conditions (high temperatures/acidity). Then, modification methods are developed aiming the improving of starch technological utilization. Oxidative modification with H2O2 has been the subject of many researches. UV rays as well microwave irradiation can be used. The aim was to confirm possible thermogravimetric alterations in native cassava starch (A) granules due to a double starch modification: 1st step) H2O2 standard solutions 0.1 mol L-1 (B), 0.2 mol L-1 (C) and 0.3 mol L-1 (D) and UV rays exposure for 1h; 2nd step) microwave irradiation for 5 min. The results of thermogravimetric curves (TG-DTA) show that the behaviors of the starch proprieties were modified. Highlighting, the modified samples C and D showed a decrease on the thermal stability step. This alteration turned them suitable to many field of industry like the paper one.