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| Registros recuperados: 52 | |
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| ALVARES, V. de S.; SOUZA, J. M. L. de; PEREIRA, G. S.; MACIEL, V. T.; SOUSA, S. B. de; PEREIRA, J. D. da S.. |
| Apesar da qualidade elevada, o processo de extração do óleo presente na polpa da bacaba é realizado na região Norte prioritariamente na forma artesanal, sendo os frutos aquecidos em água para que ocorra o amolecimento da polpa. Após essa etapa, realiza-se maceração manual e novo aquecimento com água para separação do óleo sobrenadante. Essa exposição a elevadas temperaturas prejudica a qualidade final do óleo, além de ser um método demorado e de baixo rendimento. Em contraposição, extrações químicas resultam em maior rendimento, contudo podem deixar resíduos nos óleos que não são adequados para a produção de comestíveis. Dessa forma, propõe-se otimizar o método mecânico de extração de óleo do mesocarpo de bacaba, para obtenção de um bom rendimento e óleo... |
| Tipo: Comunicado Técnico (INFOTECA-E) |
Palavras-chave: Oenocarpus bacaba; Mesocarpo; Mesocarpio; Aceite vegetal; Extracción; Tecnologia de Alimento; Bacaba; Pericarpo; Óleo Vegetal; Extração; Food technology; Mesocarp; Vegetable oil; Extraction. |
| Ano: 2018 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1099841 |
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| Pasquet, Virginie; Cherouvrier, Jean-rene; Farhat, Firas; Thiery, Valerie; Piot, Jean-marie; Berard, Jean-baptiste; Kaas, Raymond; Serive, Benoit; Patrice, Thierry; Cadoret, Jean-paul; Picot, Laurent. |
| The performance of microwaves irradiation (MAE and VMAE) to extract pigments from two marine microalgae was compared to conventional processes (cold and hot soaking and ultrasound-assisted extraction). Pigments were quantified by RP-HPLC and extraction performance was assessed regarding rapidity, reproducibility and extraction yields. Scanning electron microscopy was used at all extraction steps to assess the impact of the process on microalgal cell integrity. Freeze-drying and pigments extraction preserved microalgae cell integrity (except sonication) and evoked agglutination in superposed cells layers. All processes performed on Dunaliella tertiolecta (chlorophyte) lead to rapid pigments extraction, and equivalent pigments extraction yields, the absence... |
| Tipo: Text |
Palavras-chave: Pigments; Microalgae; Microwave; Extraction; Chlorophyll; Fucoxanthin; Carotene; MAE; VMAE. |
| Ano: 2011 |
URL: http://archimer.ifremer.fr/doc/00029/14059/11533.pdf |
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| Sedjo, Roger A.. |
| Unlike other resources such as petroleum, coal, and copper, forests are renewable. Yet, in many respects forests historically have been treated as a nonrenewable resource in that forest stocks were depleted or "mined" and loggers moved on to exploit other "deposits." The lands were often put to other uses, typically agricultural, or allowed to regenerate naturally. This paper looks at technical change in forest extraction, i.e., logging under a number of different conditions. It finds that, on average, labor productivity has been increasing in recent decades. However, total factor productivity in the US has declined in recent years. In addition, the study examines the tree-growing potential of plantation forestry. It finds that there is underway a... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Productivity; Resources; Forests; Timber; Technology; Innovations; Plantations; Logging; Genetics; Extraction; Resource /Energy Economics and Policy; O31; O32; O50; O51; Q23. |
| Ano: 1997 |
URL: http://purl.umn.edu/10667 |
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| Nora,Flávia Michelon Dalla; Borges,Caroline Dellinghausen. |
| ABSTRACT: Essential oils are substances originated from plants in general. These compounds are well known to have a high biological activity, specially the antioxidant and antimicrobial. Several extraction techniques are employed to obtain these substances. However, the majority of these techniques require a long extraction time. In this sense, innovative and alternative extraction techniques, such as ultrasound, have recently been the target of studies. In view of the small amount of publications using ultrasonic pretreatment, this review aimed to congregate current relevant information on ultrasound-assisted extraction of essential oils. In this sense, theoretical aspects, such as the main factors that influence the performance of this technique as well... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Essential oil; Food; Extraction; Ultrasound; Green chemistry. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017000900753 |
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| Registros recuperados: 52 | |
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