Brazil nut
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Recent papers in Brazil nut
We attempt to describe the historical trajectory of the Brazil nut as a product obtained essentially through gathering, and by the very earliest of Amerindian societies. Despite being an established product in both domestic and foreign... more
We attempt to describe the historical trajectory of the Brazil nut as a product obtained essentially through gathering, and
by the very earliest of Amerindian societies. Despite being an established product in both domestic and foreign markets, Brazil nut trees have suffered from the negative consequences of a series of public policies in the Amazon region. Japanese immigrants who settled in Tomé-Açu (1929) and Parintins (1931) were the first to try planting Brazil nut trees in agroforestry systems (AFS). In the 1980s, with the development of seedlings techniques and grafting by EMBRAPA Amazônia Oriental, large-scale plantations were attempted which struggled to achieve economic viability. The loss of Brazilian hegemony to Bolivia, the changes in the marketing process and the difficulties establishing the Brazil nut as a cultivated plant remain major challenges for the future. The inclusion of Brazil nut trees in agroforestry systems potentially offers one of the most promising ways to ensure their economic viability.
by the very earliest of Amerindian societies. Despite being an established product in both domestic and foreign markets, Brazil nut trees have suffered from the negative consequences of a series of public policies in the Amazon region. Japanese immigrants who settled in Tomé-Açu (1929) and Parintins (1931) were the first to try planting Brazil nut trees in agroforestry systems (AFS). In the 1980s, with the development of seedlings techniques and grafting by EMBRAPA Amazônia Oriental, large-scale plantations were attempted which struggled to achieve economic viability. The loss of Brazilian hegemony to Bolivia, the changes in the marketing process and the difficulties establishing the Brazil nut as a cultivated plant remain major challenges for the future. The inclusion of Brazil nut trees in agroforestry systems potentially offers one of the most promising ways to ensure their economic viability.
At the beginning of the 21st century, and after several decades of strong exploratory pressure, Brazilian production and exports of Brazil nuts showed clear signs of serious decline. It shows how it was successful in diagnosing the causes... more
At the beginning of the 21st century, and after several decades of strong exploratory pressure, Brazilian production and exports of Brazil nuts showed clear signs of serious decline. It shows how it was successful in diagnosing the causes of losses in production and in overcoming the economic crisis that was threatening the continuation of the activity as a result of applied scientific research and local development projects promoted by the Federal University of Amazonas and its partners whose objectives aimed at spreading the adoption of agroecological principles and good practices in the management of native chestnut forests, the quality of production and post-harvest and processing by collecting communities and local industries.
Shelled and broken Brazil nuts easily lose quality, if not properly stored. Pressing is an alternative use of these nuts and the crude oil stability was studied. Our previous studies demonstrated that TBHQ (200 mg kg-1) was very efficient... more
Shelled and broken Brazil nuts easily lose quality, if not properly stored. Pressing is an alternative use of these nuts and the crude oil stability was studied. Our previous studies demonstrated that TBHQ (200 mg kg-1) was very efficient to prevent rancidity development in oils bottled in brown and clear glass. As TBHQ has higher price than other phenolic antioxidants like BHT and BHA, an oven test (at 63 degrees C) was conducted to determine the economical and best concentration of TBHQ for Brazil nut crude oil. An assay at ambient temperature was conducted in brown and clear glass flasks with and without the economical concentration of TBHQ calculated (83 mg kg-1) for 90 days. Acid, peroxide, and iodine indices and the absorptivity at 232 nm were determined. TBHQ, even at this low dosage, was very efficient in both brown and clear glass flasks. Peroxide value increased from 11.5 meq O2 kg-1 to average 15 and 35, in TBHQ and control samples after 90 days. The absorptivity at 232 n...
Resumo Os estados do Acre e do Amapá apresentam algumas semelhanças referentes às políticas de desenvolvimento local a partir da valorização das cadeias produtivas de produtos florestais não-madeireiros, sendo que a da castanha-do-Brasil... more
Resumo Os estados do Acre e do Amapá apresentam algumas semelhanças referentes às políticas de desenvolvimento local a partir da valorização das cadeias produtivas de produtos florestais não-madeireiros, sendo que a da castanha-do-Brasil (Bertholletia excelsa) concentrou inicialmente grande parte das ações nos dois estados. Com base nesses contextos similares, o objetivo do artigo é realizar uma análise das estratégias de desenvolvimento local relacionadas à cadeia produtiva da castanha-do-Brasil no Acre e no Amapá, a fim de identificar os aspectos favoráveis e desfavoráveis ao desenvolvimento desta cadeia nos dois estados. Apresentamos inicialmente as principais diferenças e similaridades da cadeia nos dois estados, seguido de uma proposta de quadro teórico que possibilitou o entendimento dos principais obstáculos e aspectos favoráveis ao desenvolvimento da cadeia nos dois casos estudados. Os elementos teóricos utilizados na análise dessas estratégias relacionam-se aos aspectos organizacionais internos e externos às cooperativas extrativistas, que foram criadas tendo como um dos objetivos principais a promoção do desenvolvimento sustentável das comunidades extrativistas locais. Abordaremos os conceitos de autogestão e empoderamento para analisar os aspectos internos das cooperativas, e as estruturas de cadeia produtiva, cadeia de suprimento (supply chain) e arranjo produtivo local para analisar os aspectos externos às cooperativas. A metodologia utilizada para a avaliação nos dois estados consistiu em um estudo exploratório sobre a cadeia produtiva da castanha-do-Brasil em cada estado, que permitiu uma revisão de literatura mais pertinente sobre os conceitos organizacionais ligados ao contexto dos projetos de desenvolvimento analisados e um estudo de casos múltiplos em seis cooperativas, sendo três localizadas no Acre e três no Amapá. Os resultados das avaliações, que fazem parte de uma pesquisa mais abrangente, sinalizam que o estado do Acre apresenta uma maior orientação e integração dos atores locais para o desenvolvimento da cadeia produtiva-e até mesmo de um arranjo produtivo local-da castanha-do-Brasil. Entretanto, mesmo neste estado, alguns obstáculos ainda devem ser superados, principalmente aqueles relacionados aos aspectos organizacionais internos às cooperativas extrativistas locais.
- by Janaina D D A S Diniz and +1
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- Amazonia, Extractivism, Brazil nut