Consulta: subjectFacets:"Extraction"
Registros recuperados: 52
Data/hora: 10/06/2024 07:50:06

Cultivo hidropónico y manejo nutrimental de la producción anual de Antirrhinum majus L. en condiciones de invernadero.
Provedor de dados: 32
Autores: Rojas Velázquez, Angel Natanael.
La información y tecnologías para el cultivo hidropónico de  perrito (Antirrhinum majus L.) en invernadero es limitada y requiere mayor conocimiento e investigación para el adecuado manejo del cultivo. En el presente estudio se utilizó un material de verano (Grupo IV) serie Potomac cv. Rose, para determinar los efectos del potencial osmótico (PO) en la solución nutritiva (-0.036, -0.054, -0.072, -0.090 y  -0.108 MPa) en el contenido de biomasa y calidad comercial, análisis de crecimiento, absorción y extracción nutrimental, durante en cultivos de invierno y verano. En general las diferentes variables evaluadas, biomasa aérea, vida de florero y días a cosecha se vieron afectados por los tratamientos de PO y por las estaciones de crecimiento. La...
Palavras-chave: Análisis de crecimiento; Absorción; Extracción; Hidroponía; Invernaderos; Growth analysis; Absorption; Extraction; Hydroponic; Greenhouse; Doctorado; Fruticultura.
Ano: 2010
URL: http://hdl.handle.net/10521/237

Potencial osmótico y absorción nutrimental en el cultivo in vitro de Agave potatorum Zucc.
Provedor de dados: 32
Autores: Solano Agama, Ana Luisa.
Con el objeto de conocer el efecto del potencial osmótico de las sales inorgánicas del medio de Murashige y Skoog se determinó el contenido de humedad, peso de materia seca, concentración y extracción nutrimental en brotes de Agave potatorum Zucc. Se establecieron medios de cultivo con los siguientes potenciales osmóticos: -0.187, -0.139, -0.094 y -0.050 MPa. El experimento se estableció con un diseño completamente al azar con tres repeticiones. Los datos obtenidos se sometieron a un análisis de varianza y comparación de medias. Después de 90 días del establecimiento del experimento se encontraron diferencias estadísticas significativas entre tratamientos para las variables evaluadas. El medio de cultivo con potencial osmótico de -0.187 MPa presentó los...
Palavras-chave: Agave potatorum; Potencial osmótico; Medio MS; Absorción; Extracción nutrimental; Osmotic potential; MS's medium; Nutrient absorption; Extraction; Maestría; Edafología.
Ano: 2011
URL: http://hdl.handle.net/10521/412

Potencial osmótico y absorción nutrimental en el cultivo in vitro de Agave potatorum Zucc.
Provedor de dados: 32
Autores: Solano Agama, Ana Luisa.
Con el objeto de conocer el efecto del potencial osmótico de las sales inorgánicas del medio de Murashige y Skoog se determinó el contenido de humedad, peso de materia seca, concentración y extracción nutrimental en brotes de Agave potatorum Zucc. Se establecieron medios de cultivo con los siguientes potenciales osmóticos: -0.187, -0.139, -0.094 y -0.050 MPa. El experimento se estableció con un diseño completamente al azar con tres repeticiones. Los datos obtenidos se sometieron a un análisis de varianza y comparación de medias. Después de 90 días del establecimiento del experimento se encontraron diferencias estadísticas significativas entre tratamientos para las variables evaluadas. El medio de cultivo con potencial osmótico de -0.187 MPa presentó los...
Palavras-chave: Agave potatorum; Potencial osmótico; Medio MS; Absorción; Extracción nutrimental; Osmotic potential; MS's medium; Nutrient absorption; Extraction; Maestría; Edafología.
Ano: 2011
URL: http://hdl.handle.net/10521/412

Cultivo hidropónico y manejo nutrimental de la producción anual de Antirrhinum majus L. en condiciones de invernadero.
Provedor de dados: 32
Autores: Rojas Velázquez, Angel Natanael.
La información y tecnologías para el cultivo hidropónico de  perrito (Antirrhinum majus L.) en invernadero es limitada y requiere mayor conocimiento e investigación para el adecuado manejo del cultivo. En el presente estudio se utilizó un material de verano (Grupo IV) serie Potomac cv. Rose, para determinar los efectos del potencial osmótico (PO) en la solución nutritiva (-0.036, -0.054, -0.072, -0.090 y  -0.108 MPa) en el contenido de biomasa y calidad comercial, análisis de crecimiento, absorción y extracción nutrimental, durante en cultivos de invierno y verano. En general las diferentes variables evaluadas, biomasa aérea, vida de florero y días a cosecha se vieron afectados por los tratamientos de PO y por las estaciones de crecimiento. La...
Palavras-chave: Análisis de crecimiento; Absorción; Extracción; Hidroponía; Invernaderos; Growth analysis; Absorption; Extraction; Hydroponic; Greenhouse; Doctorado; Fruticultura.
Ano: 2010
URL: http://hdl.handle.net/10521/237

Effects of drying air temperature and grain initial moisture content on soybean quality (Glycine Max (L.) Merrill)
Provedor de dados: 70
Autores: Coradi,Paulo C.; Fernandes,Carlos H. P.; Helmich,Jean C.; Goneli,André L. D.
ABSTRACT This study aimed to evaluate the effect of air-drying temperature and initial moisture content on volume shrinkage, physical quality and oil extraction yield of soybean grains. The grains used in this experiment were harvested at two distinct moisture levels of 19 and 25%. Then, these grains were taken to dryness at three different air temperatures of 75 °C, 90 °C and 105 °C, in a forced circulation convection oven of the air. The results showed a drying time reduction with increasing air temperatures. Regarding volume shrinkage, moisture content reductions influenced grain volume and the Rahman's model was the one that best fit the data. Moreover, the higher the air temperature, the greater the effects on soybean grain shrinkage and physical...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Extraction; Performance; Processing.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162016000500866

A Cultura do açaí.
Provedor de dados: 14
Autores: NOGUEIRA, O. L.; CARVALHO, C. J. R. de; MULLER, C. H.; GALVÃO, E. U. P.; SILVA, H. M. e; RODRIGUES, J. E. L. F.; OLIVEIRA, M. do S. P. de; CARVALHO, J. E. U. de; ROCHA NETO, O. G. da; NASCIMENTO, W. M. O. do; CALZAVARA, B. B. G.
Introdução; Clima e solo; Variedades; Formacao de mudas; Plantio; Tratos culturais; Adubacao; Controle de pragas e doencas; Colheita e beneficiamento dos frutos; Extração e beneficiamento do palmito; Coeficientes de produção.
Tipo: Col Criar Plantar ABC 500P/500R Saber (INFOTECA-E)
Palavras-chave: Cultivo; Trato cultural; Cabbage palm; Cultivation; Seedling; Plantation; Harvest; Fruit.; Solo; Plantio; Muda; Colheita; Palmito; Beneficiamento; Extração; Euterpe Oleracea.; Extraction; Soil.
Ano: 1995
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/115005

Métodos de extração de hidrocarbonetos policíclicos aromáticos em amostra de solo, sedimento e lodo.
Provedor de dados: 14
Autores: QUEIROZ, S. C. N.; FERRACINI, V. L.; SOUZA, D. R. C. de.
bitstream/item/12265/1/documentos_79.pdf
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Hidrocarbonetos policíclicos aromáticos; Métodos de extração; Análise química; Extração; Hidrocarboneto; Solo; Adubo de esgoto; Amostragem; Analytical methods; Extraction; Polycyclic aromatic hydrocarbons.
Ano: 2009
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/83100

Coeficientes técnicos, custo e rentabilidade para a coleta de castanha-do-brasil no Estado do Acre: sistema de produção melhorado.
Provedor de dados: 14
Autores: SA, C. P. de; BAYMA, M. M. A.; WADT, L. H. de O.
A castanheira (Bertholletia excelsa Bonpl., Lechytidaceae) é uma das árvores símbolo da Amazônia devido a sua importância social, ecológica e econômica para a região. Milhares de famílias de extrativistas e produtores rurais utilizam a semente da castanheira, popularmente conhecida como castanha-do-pará ou castanha-do-brasil e mais recentemente castanha-da-amazônia, como fonte de renda. O sistema tradicional de coleta da castanha-do-brasil não considera a qualidade do produto comercializado, especialmente com relação às condições sanitárias (contaminação por aflatoxinas e coliformes fecais), o que muitas vezes ocasiona a impugnação pelo mercado comprador. Os grandes entraves para a cadeia produtiva da castanha-do-brasil têm sido o transporte e...
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Produto florestal não madeireiro; Castanha do brasil; RESEX Chico Mendes; Brasiléia (AC); Acre; Western Amazon; Amazônia Ocidental; Amazonia Occidental; Análisis de costo-beneficio; Análisis económico; Extracción; Fruit; Frutos; Insumos agrícolas; Madera tropical; Rentabilidad.; Productos forestales no madereros; Nuez del Brazil; Rentabilidade; Análise econômica; Castanha do pará; Bertholletia excelsa; Análise de custo-benefício; Essência florestal; Fruto; Extração; Insumo.; Farm inputs.; Cost benefit analysis; Economic analysis; Extraction; Tropical wood; Nontimber forest products; Brazil nuts; Profitability.
Ano: 2008
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/494706

Metodo para a extracao de substancias humicas do solo: acido humico e acido fulvico.
Provedor de dados: 14
Autores: MACHADO, P. L. O. de A.
bitstream/item/62948/1/CNPS-COM.-TEC.-1-99.pdf
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Substancia humica; Acido humico; Acido fulvico; Humic Acid.; Extração.; Extraction; Humic substances.
Ano: 1999
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/336496

Extração do aroma de bacuri e sua utilização como flavorizante em iogurte natural.
Provedor de dados: 14
Autores: NAZARÉ, R. F. R. de; MELO, C. F. M. de.
bitstream/item/33536/1/CPATU-CirTec15.pdf
Tipo: Circular Técnica (INFOTECA-E)
Palavras-chave: Bubalino; Flavorizante; Flavour; Buffalo; Flavorer.; Bacuri; Aroma; Extração; Iogurte; Leite; Platonia Insignis; Tecnologia.; Extraction; Milk; Technology; Yogurt.
Ano: 1981
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/378781

Oportunidades, limitações e estratégias para a economia extrativa vegetal na Amazônia.
Provedor de dados: 14
Autores: HOMMA, A. K. O.
Tipo: Parte de livro
Palavras-chave: Extrativismo vegetal; Brasil; Forest; Economy; Economia; Floresta; Amazonia; Extraction.
Ano: 1992
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/394290

Extração de óleo do mesocarpo de bacaba.
Provedor de dados: 14
Autores: ÁLVARES, V. de S.; SOUZA, J. M. L. de.
O método de extração mecânica do mesocarpo desidratado dos frutos da bacabeira obtém maior rendimento e qualidade do óleo em relação ao método tradicional comumente utilizado na região. Dessa forma, torna-se uma opção viável para utilização dos recursos naturais das populações locais, além de não utilizar solventes químicos, que não são permitidos para uma produção orgânica.
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Oenocarpus bacaba; Jessenia; Aceite vegetal; Extracción; Bacaba; Óleo Vegetal; Extração; Vegetable oil; Extraction.
Ano: 2019
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1112669

Recomendações técnicas para extração de óleo do mesocarpo de bacaba.
Provedor de dados: 14
Autores: 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

Adaptação ao modelo tradicional de extração de oleorresina da copaíba.
Provedor de dados: 14
Autores: GUARINO, E. de S. G.; FONSECA, F. L. da; ULLER, H. F.; WADT, L. H. de O.
O oleorresina de copaíba (Copaifera L.) é um dos mais tradicionais produtos florestais não madeireiros extraídos na Amazônia. No entanto, como todos os outros produtos oriundos da floresta, apresenta lacunas de conhecimento e tecnologias para consolidação da cadeia produtiva. Na busca pela melhoria ergonômica e efi ciência na extração do oleorresina de copaíba, foi testada a viabilidade técnica do uso de um trado adaptado à motosserra para obtenção de oleorresina de copaíba.
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Produto florestal não-madeireiro; Embrapa Acre; Rio Branco (AC); Acre; Amazônia Ocidental; Copaifera L; Productos forestales no madereros; Adopción de innovaciones; Amazonia occidental; Extracción; Oleoresinas; Western amazon.; Copaiba; Oleorresina; Extração; Tecnologia apropriada; Campo Experimental; Tecnologia.; Nontimber forest products; Oleoresins; Extraction; Technology; Innovation adoption.
Ano: 2016
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1060569

Extração de óleo essencial de alecrim-do-mato (Lippia grata Schauer - Verbenaceae).
Provedor de dados: 14
Autores: SOUZA, A. V. de.
Óleo essencial é definido pela Organização Internacional de Padrões (ISO) como sendo os produtos obtidos de partes das plantas por meio de destilação por arraste com vapor d?água, bem como os produtos obtidos por esmagamento de pericarpos de frutos cítricos. São misturas complexas de substâncias voláteis, lipofílicas, líquidas, incolores ou ligeiramente amarelados, que possuem como característica básica o cheiro e o sabor. Na Caatinga, diversas plantas produzem óleos essenciais com potencial para exploração comercial, como por exemplo a espécie Lippia grata Schauer (Verbenaceae), conhecida popularmente como alecrim-do-mato, alecrim-dachapada ou alecrim-de-tabuleiro. É um arbusto cujas folhas são aromáticas e amplamente utilizadas na medicina popular no...
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Planta nativa; Alecrim do mato; Alecrim da chapada; Alecrim de tabuleiro; Folhas aromática; Lippia grata Schauer Verbenaceae; Caatinga; Planta Aromática; Alecrim; Óleo Essencial; Extração; Armazenamento; Lippia; Essential oil crops; Rosemary; Extraction.
Ano: 2021
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1136134

Desempenho de desfibrador comercial para espécies vegetais do Pantanal.
Provedor de dados: 14
Autores: GALVANI, F.; FÉLIX, C. G. S.
Este trabalho teve por finalidade avaliar o desempenho de um desfibrador mecânico comercial de cana-de-açúcar quanto à sua eficiência para a remoção de fibras para as espécies do gravatá, carandá e da bocaiuva em escala de bancada.
Tipo: Circular Técnica (INFOTECA-E)
Palavras-chave: Fibra Vegetal; Extração; Gravata; Caranda; Bocaiuva; Natural fibers; Plant fibers; Extraction.
Ano: 2017
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1083015

Observações sobre a extração de borracha de sapium, de balata de massaranduba e de outras gomas afins.
Provedor de dados: 14
Autores: MONTEIRO, F. P.
bitstream/item/197868/1/FL00298.pdf
Tipo: Outras publicações técnicas (INFOTECA-E)
Palavras-chave: Sepium; Massaranduba; Brasil; Balata; Borracha; Extração; Latex; Murupita; Amazonia; Extraction; Rubber.
Ano: 1943
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/374265

Extraction de matériaux marins. Sous-région marine Manche - Mer du Nord. Evaluation initiale DCSMM.
Provedor de dados: 5
Autores: Kalaydjian, Regis.
Tipo: Text
Palavras-chave: Manche; Mer du Nord; Extraction; Granulats marins; Réglementation environnementale; Interaction avec le milieu.
Ano: 2012
URL: https://archimer.ifremer.fr/doc/00328/43892/43465.pdf

Study on the microalgal pigments extraction process: Performance of microwave assisted extraction
Provedor de dados: 5
Autores: 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

Extraction de matériaux marins. Sous-région marine Méditerranée occidentale. Evaluation initiale DCSMM.
Provedor de dados: 5
Autores: Kalaydjian, Regis.
Tipo: Text
Palavras-chave: Méditerranée; Extraction; Granulats marins; Réglementation environnementale; Interaction avec le milieu.
Ano: 2012
URL: https://archimer.ifremer.fr/doc/00331/44260/43829.pdf

Dynamical modelling of a reactive extrusion process: Focus on residence time distribution in a fully intermeshing co-rotating twin-screw extruder and application to an alginate extraction process
Provedor de dados: 5
Autores: Baron, Regis; Vauchel, Peggy; Kaas, Raymond; Arhaliass, Abdellah; Legrand, Jack.
The context of this study is the modelling of reactive extrusion process based on an alginate extraction protocol. Residence Time Distribution (RTD) is one important part to predict the kinetics of reactive compounds. A simple model is proposed to predict RTD in fully intermeshing co-rotating twin-screw extruders without reaction. This model, which can be easily extended to reactive case in a future work, is based on the extension of an axial dispersion model, including control parameters (screw speed and flow rate) and geometrical parameters (screw profile and die design). Simulations were performed for various operating and geometrical conditions so as to illustrate possibilities offered by the proposed model. Validation was conducted for two different...
Tipo: Text
Palavras-chave: Alginate; Extraction; Extrusion; Mathematical modelling; Residence time distribution; Simulation; Laminaria digitata.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00005/11592/8985.pdf

Extraction de matériaux marins. Sous-région marine Golfe de Gascogne. Evaluation initiale DCSMM.
Provedor de dados: 5
Autores: Kalaydjian, Regis.
Tipo: Text
Palavras-chave: Golfe de Gascogne; Extraction; Granulats marins; Réglementation environnementale; Interaction avec le milieu.
Ano: 2012
URL: https://archimer.ifremer.fr/doc/00330/44078/43649.pdf

Optimisation de procédés innovants pour l'obtention de phycocolloïdes
Provedor de dados: 5
Autores: Vauchel, Peggy.
Alginates are polysaccharides which are naturally present in the cell wall of brown algae and extracted because of their rheological properties. The alginate industry uses an extraction protocol, which central step, the carbonatation, is conducted in batch reactors. It is a high water, reagent and time demanding process. The main objective of this thesis is to optimize the alginate extraction process. A study of the existing process, focused on carbonatation step, enabled to highlight points which could be enhanced to optimize the extraction yield and the quality of extracted alginates. Stirring intensity and algae pieces size have been identified as parameters having an influence on the carbonatation reaction kinetics. A specific analysis on medullar and...
Tipo: Text
Palavras-chave: Alginate; Extraction; Laminaria digitata; Extrusion réactive; Optimisation; Modélisation; Distribution des temps de séjour; Cinétique; Rendement; Propriétés rhéologiques; Alginate; Extraction; Laminaria digitata; Reactive extrusion; Optimization; Modeling; Residence time distribution; Kinetics; Extraction yield; Rheological properties.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/00002/11364/7937.pdf

Characterisation of dissolved organic compounds in hydrothermal fluids by stir bar sorptive extraction - gas chomatography - mass spectrometry. Case study: the Rainbow field (36 degrees N, Mid-Atlantic Ridge)
Provedor de dados: 5
Autores: Konn, Cecile; Charlou, Jean-luc; Donval, Jean-pierre; Holm, Nils G.
The analysis of the dissolved organic fraction of hydrothermal fluids has been considered a real challenge due to sampling difficulties, complexity of the matrix, numerous interferences and the assumed ppb concentration levels. The present study shows, in a qualitative approach, that Stir Bar Sorptive Extraction (SBSE) followed by Thermal Desorption - Gas Chromatography - Mass Spectrometry (TD-GC-MS) is suitable for extraction of small sample volumes and detection of a wide range of volatile and semivolatile organic compounds dissolved in hydrothermal fluids. In a case study, the technique was successfully applied to fluids from the Rainbow ultramafic-hosted hydrothermal field located at 36 degrees 14'N on the Mid-Atlantic Ridge (MAR). We show that...
Tipo: Text
Palavras-chave: Sample preparation; Extraction; Organic compounds; Hydrothermal fluids; Ultramafic rocks.
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00114/22514/20196.pdf

Novel Antifungal Compounds, Spermine-Like and Short Cyclic Polylactates, Produced by Lactobacillus harbinensis K.V9.3.1Np in Yogurt
Provedor de dados: 5
Autores: Mosbah, Amor; Delavenne, Emilie; Souissi, Yasmine; Mahjoubi, Mouna; Jehan, Philippe; Le Yondre, Nicolas; Cherif, Ameur; Bondon, Arnaud; Mounier, Jerome; Baudy-floc'H, Michele; Le Blay, Gwenaelle.
Lactobacillus harbinensis K.V9.3.1Np was described as endowed with high antifungal activity. Most of the studies associated this activity to the produced organic acids, i.e., lactic acid, acetic acid, and hexanoic acid. The aim of this study was to purify and identify, other not yet described, antifungal molecules produced by L. harbinensis K.V9.3.1 Np when used in yogurt fermentation. Active compounds were extracted through several extraction processes using organic solvents and protein precipitation. The fractions of interest were purified using flash chromatography and preparative HPLC for specific characterization. The bioactive compounds identification was performed using Nuclear Magnetic Resonance and Mass Spectrometry. Activity tests against...
Tipo: Text
Palavras-chave: Spermine; Polylactates; Lactobacillus; Extraction; Purification; Ms; Nmr.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00616/72773/72221.pdf

Purification de la chitine par hydrolyse enzymatique à partir de coproduits de crevette Penaeus vannamei. Caractérisations des produits et optimisation du procédé
Provedor de dados: 5
Autores: Le Roux, Karine.
The objective of this study was to optimize the extraction of chitin by acid proteolysis. The novelty of the method is based on the stabilization of pH by the balance between substrate composition and the acid solvent. This principle allows a simultaneous demineralization and deproteinization, the two main reactions associated with the purification of chitin. To evaluate the performance of this purification, the composition of the substrate and products was characterized. Different methods of quantification of chitin and proteins have been compared. As traditional assays were not satisfaying, a direct method of amino acids determination by gaz chromatography was selected to estimate the amount of protein. The estimate of chitin amount was based on indirect...
Tipo: Text
Palavras-chave: Coproduits de crustacés; Hydrolyse enzymatique; Protéolyse; Chitine; Extraction; Cinétique; Déminéralisation; Déprotéinisation; Crustacean by-products; Enzymatic hydrolysis; Proteolysis; Chitin; Extraction; Kinetic; Demineralization; Deproteinization.
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00087/19828/17470.pdf

Fiches Techniques. BD Récif. Mode d'emploi sous forme de fiches synthétiques permettant de faciliter l'utilisation de BD Récif de la saisie à l'administration des données
Provedor de dados: 5
Autores: Maurel, Laurence; Bocande, Stephane; Duval, Magali; Gauthier, Emilie; Huguet, Antoine.
Ces fiches ont été rédigées pour accompagner la mise en service de l'outil "BD Récif" et constitue la notice d'utilisation simplifiée. BD Récif est une application destinée à faciliter la bancarisation  des données relatives aux écosystèmes récifaux (suivis des aires marines protégées, suivis de la Directive Cadre sur l'eau, programmes de recherche, …). Cet outil a été financé par l'Etat / DEAL Réunion (inscrit dans le TIT Resobs de l'IFRECOR), le MNHN et IFREMER. Il a été mis en production en 2016 et livré avec des données historiques qui ont fait l'objet pour partie de reprises depuis l'outil CoReMo. Cet outil s'appuie sur le Système d'Information Quadrige² (constituant le système central, car désigné par le Ministère en charge de l'Environnement comme...
Tipo: Text
Palavras-chave: BD Récif; Données; Métadonnées; Résultats; Saisie; Extraction; Administration; Base de données; Benthos de substrats durs; Récifs coralliens.
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00386/49776/50321.pdf

Obtención de extracto de café por percolación
Provedor de dados: 20
Autores: Ortega, A.; Borges, P.; Roncal, E.; Rogert, E.; Pino, J. A.
Las mejores condiciones de extracción por percolación fueron empleando un tamaño de partícula promedio de 1,7 mm y una velocidad de extracción de 102 mL/h. El rendimiento del mejor extracto fue 79,2 % presentando 3,1 % de sólidos totales y una calificación del sabor a café de 5,1 que corresponde a una intensidad moderada. La variable acidez está determinada por la velocidad de extracción y en menor medida el tamaño de partícula; a medida que ambos factores disminuyen, la acidez se incrementa. En el contenido de sólidos totales se aprecia que al disminuir el tamaño de partícula, fue mayor el contenido de sólidos y el sabor a café está determinado fundamentalmente por el tamaño de partícula. A medida que este factor disminuyó, aumentó la intensidad del sabor...
Tipo: Journal Contribution
Palavras-chave: Food processing; Size; Coffee pulp; Flavour; Extraction.
Ano: 2013
URL: http://hdl.handle.net/1834/5016

The Forest Sector: Important Innovations
Provedor de dados: 31
Autores: 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

Análise de arranjos para extração de óleos vegetais e suprimento de usina de biodiesel
Provedor de dados: 31
Autores: Sartori,   Marco Antonio; Perez,   Ronaldo; da Silva Junior,   Aziz Galvao; Machado,   Silvia Regina Sartori; Santos,   Manoela Maciel de Souza; Miranda,   Carlos Alberto de Castro.
This study aimed at the technical-economical evaluation of implanting some vegetal-oil extraction units in order to insert the family agriculture into bio-diesel production chain. Three project models (arrangements) for vegetal-oil extraction units at different sizes were proposed, using extraction by pressing and mixed extraction (extracting by either pressing or solvent) and different raw materials (castor-oil and soybean). For the size analysis, the oil production scales between 50/60 tons/day were used with real market data concerning investments, inputs prices of the process, raw materials and vegetal oil. For the economic analyses, the software BioSoft was used. The BioSoft is a program for supporting the decision-making process, which was developed...
Tipo: Journal Article
Palavras-chave: Vegetal oil; Extraction; Viability; Crop Production/Industries; L25; D81; L69.
Ano: 2009
URL: http://purl.umn.edu/60807

NUTRIENT DEMAND BY THE CARROT CROP IS INFLUENCED BY THE CULTIVAR
Provedor de dados: 90
Autores: Aquino,Rosiane Filomena Batista Almeida; Assunção,Natália Silva; Aquino,Leonardo Angelo; Aquino,Priscila Maria de; Oliveira,Guilherme Anthony de; Carvalho,André Mundstock Xavier de.
Farmers must carefully choose the cultivar to be grown for a successful carrot crop. The yield potential of the cultivar may influence nutrient demand and should be known to plan for fertilization application. The aim of this study was to evaluate the cultivar effect on carrot yield and on the nutrient content and quantities allocated to leaves and roots. Three experiments were set up in two crop seasons in Rio Paranaíba, MG, Brazil. In the first season, typical summer, 10 summer cultivars were sown. In the second season, summer-winter (transition), two experiments were set up, one with summer cultivars and the other with winter cultivars. The treatments consisted of the carrot cultivars distributed in randomized blocks with four replications. Fresh and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Daucus carota L.; Nutritional balance; Extraction; Nutrient export.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832015000200541

Aflatoxin removal of peanut meals with aqueous ethanol
Provedor de dados: 63
Autores: Fonseca,H.; Regitano-d'Arce,M.A.B.
A preliminary approach to achieve compatible simultaneous extraction of aflatoxin and residual oil from pressed oil meals was conducted to determine the minimum amount of water to be added to ethanol versus necessary time to achieve complete removal of aflatoxin. Commercial anhydrous, 96, 93 and 90°GL ethanol were utilized in trials with Soxhlet extractors. Commercial anhydrous ethanol did not remove aflatoxin completely and the extraction efficiency in minutes was directly proportional to the amount of water present in the ethanol, as expected. Although 96°GL ethanol was efficient, alcoholic strengths between 96 and 99°GL need be evaluated to improve oil extraction, provided they do not decrease aflatoxin removal efficiency.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Aflatoxin; Peanut meal; Oil meals; Removal; Extraction; Aqueous ethanol; Ethanol.
Ano: 1993
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90161993000100021

สมบัติทางเคมี-กายภาพ ชีววิทยา และสมบัติเชิงหน้าที่ของโปรตีนจากรำข้าวอินทรีย์
Provedor de dados: 106
Autores: Kittima Triratanasirichai; Saroat Rawdkuen.
Physico-chemical, biological and functional properties of proteins extracted from organic rice bran with different methods were determined. Rice bran protein (RBP) obtained from enzymatic (phytase-xylanase) extraction showed the lowest color difference (ΔE, P&lt;0.05). Bulk density of RBP was ranged between 0.71-0.73 g/ml (P&gt;0.05). Total soluble solid and pH of RBP obtained from different extraction methods were not significantly different (P&gt;0.05). Sonication method provided the extract with the highest total phenolic content (3.01 mg tannic acid/g RBP), DPPH radical scavenging activity (62.29%), and ferric reducing activity power (FRAP 2.00 mM). The highest protein solubility (48.36%) and water absorption capacity (2.36 g/g sample) was found in the...
Tipo: PhysicalObject
Palavras-chave: Extraction; Rice bran protein; Organic rice bran; Antioxidant; การสกัด; โปรตีนจากรำข้าว; รำข้าวอินทรีย์; สารต้านอนุมูลอิสระ; สมบัติเชิงหน้าที่.
Ano: 2012
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5448

เทคนิคการสกัด DNA จากใบข้าวโพดสดให้มีคุณภาพดี
Provedor de dados: 106
Autores: Chaba Jampatong; Chatpong Balla; Usa Choorak; Gunyavee Saipun.
12 ill., 3 tables
Palavras-chave: Corn; Maize; DNA; Extraction; ข้าวโพด; ดีเอ็นเอ; การสกัด; ใบ.
Ano: 2004
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4211

Criteria for the Extraction of Fish Oil
Provedor de dados: 111
Autores: BAKO, TANKO; VICTOR, UMOGBAI I; J, AWULU O.
The effect of pre-treatment of mackery (Scomber scombrus) on oil recovery and quality was investigated. Fish oil was extracted using the screw expeller press after heat pre-treatment of the fish sample. The effect of cooking temperatures and cooking times was evaluated. It was observed that the oil yield has a positive relationship with cooking temperature. The oil yield increased with increasing cooking temperature at all the cooking times investigated and also increased with increasing cooking time from 5-15 minutes and then decreased for 20 minutes cooking time at all the cooking temperatures investigated. The results revealed that a highest yield of 22.8 % was obtained when the fish was treated at 90 0C cooking temperature for 15 minutes. The lowest...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Criteria; Fish Oil; Pre-treatment; Extraction; Oil yield.
Ano: 2017
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/4021

Mathematical modeling of mechanical horizontal screw oil extractor
Provedor de dados: 111
Autores: BAKO, TANKO; ENYI, OBETTA SAMUEL; IMOLEMHE, UMOGBAI VICTOR.
A theory using mechanical expression was proposed from the physics of oil expression in a screw press to characterize a mathematical model. The general oil expression equation was solved for three machine parameters (choke clearances, screw shaft clearances and screw shaft speeds) which simulate the machine parameters effects in the overall screw expeller process. The mathematical model was validated by the experimental data obtained from pressing fish oil with a screw press, using regression analysis. The experimental oil extraction data was fitted to the model and the quality of fit evaluated. A good fit was indicated by correlation coefficient of 0.9983, coefficient of determination of 0.9967, absolute average percentage deviation of 4.8 %, coefficient...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Mathematical; Model; Extraction; Parameters.
Ano: 2020
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/5521

Evaluation of a portable watermelon juice extracting machine
Provedor de dados: 111
Autores: ADEKANYE, TIMOTHY ADESOYE; Adelakun, Joseph Oluwasegun.
A small-scale machine for extracting watermelon juice was developed with locally available materials and evaluated to determine its best extracting operating factors. The machine slices a whole watermelon and extracts its juice content. This machine operates on the principle of compressive and shearing force exerted through an auger.  Component parts includes feeding hopper, conveyor shaft, auger conveyor housed in a cylindrical chamber, juice sieve, juice collector, seed - pulp outlet, gear and main frame. It was powered by a 1hp electric motor, coupled to a gear reduction speed to operate at 46.67 rm-1. In operation, watermelon fruits introduced via the hopper is squeezed and transferred to the auger conveyor. The auger presses and squeezes the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Agricultural Engineering Watermelon; Juice; Extraction; Small scale; Evaluation.
Ano: 2018
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/4109

Effect of Expeller Press Parameters on Fish Oil Extraction
Provedor de dados: 111
Autores: BAKO, TANKO; UMOGBAI, VICTOR I.; OBETTA, SAMUEL E.
An investigation was carried out on the effect of expeller press parameters such as choke clearances (1, 2 and 3 mm), screw clearances (1, 2 and 3 mm) and screw (worm) shaft speeds (50, 60 and 70 rpm) on fish oil extraction. The oil extraction rate and extraction efficiency had a negative relationship with choke clearances and screw clearances but had a positive relationship with screw (worm) shaft speeds. The oil extraction rate and extraction efficiency were found to decrease with increase in choke clearances and also decreased with increase in screw clearances. Increase in screw (worm) shaft speeds from 50 to 70 rpm was observed to increase oil extraction rate and extraction efficiency. The extraction loss had a positive relationship with choke...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fish oil; Extraction; Expeller; Parameters; Optimize.
Ano: 2018
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/4869

Extraction of bioactive compounds and free radical scavenging activity of purple basil (Ocimum basilicum L.) leaf extracts as affected by temperature and time
Provedor de dados: 42
Autores: PEDRO,ALESSANDRA C.; MOREIRA,FERNANDA; GRANATO,DANIEL; ROSSO,NEIVA D.
In the current study, response surface methodology (RSM) was used to assess the effects of extraction time and temperature on the content of bioactive compounds and antioxidant activity of purple basil leaf (Ocimum basilicum L.) extracts. The stability of anthocyanins in relation to temperature, light and copigmentation was also studied. The highest anthocyanin content was 67.40 mg/100 g extracted at 30 °C and 60 min. The degradation of anthocyanins with varying temperatures and in the presence of light followed a first-order kinetics and the activation energy was 44.95 kJ/mol. All the extracts exposed to light showed similar half-lives. The extracts protected from light, in the presence of copigments, showed an increase in half-life from 152.67 h for the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Anthocyanins; Extraction; Pigments; Response surface methodology.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652016000301055

Extraction of pectin from apple pomace
Provedor de dados: 52
Autores: Canteri-Schemin,Maria Helene; Fertonani,Heloísa Cristina Ramos; Waszczynskyj,Nina; Wosiacki,Gilvan.
As apple-processing units are now in expansion in Brazil, industrial by-products like pomace play an important role in pectin manufacture. The objective of this article was to determine a pratical follow-up to the extraction of pectin from apple pomace and to characterize it in a laboratory, on a small scale, aiming at establishing the optimum conditions for acid extraction. The highest yields were obtained when [1]apple pomace was dried and ground to obtain an apple flour to be used as raw material, [2] citric or nitric acids were used and [3] when the citric acid concentration was 6.2 g/100 ml and the time of reaction was 153 minutes. The apple variety in itself was not significant in pectin yield. The degree of esterification (DE = 68.84 %) of the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Apple pomace; Pectin; Agricultural wastes; Yield; Extraction; Response Surface Methodology.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132005000200013

Optimization of extraction parameters for recovery of alpha-amylase from the fermented bran of Bacillus circulans GRS313
Provedor de dados: 52
Autores: Palit,Soumen; Banerjee,Rintu.
The extraction of alpha-amylase in the solid state fermentation of wheat bran by Bacillus circulans GRS313 was optimized. Among various solvents tested, maximum extraction was achieved when 2.5% (v/v) glycerol was added. The optimum conditions for extraction were 2.5 hrs soaking time at 30° C under recirculation and agitated condition, which yielded 590 U/g bran of enzyme activity. Whereas under stationary soaking condition the activity of the enzyme was 439.58U/g bran. With repeated wash under the above optimum conditions showed that 600 U/g and 184.2 U/g of enzyme extracted in the 1st and 2nd washes respectively and only 36.84 U/g was recovered in the 3rd wash
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bacillus circulans; Solid state fermentation; Alpha- amylase; Extraction.
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132001000100015

Neural modeling of bromelain extraction by reversed micelles
Provedor de dados: 52
Autores: Fileti,Ana Maria Frattini; Fischer,Gilvan Anderson; Tambourgi,Elias Basile.
A pulsed-cap microcolumn was used for bromelain extraction from pineapple juice by reversed micelles. The cationic micellar solution used BDBAC as the surfactant, isooctane as the solvent and hexanol as the co-solvent. In order to capture the dynamic behavior and the nonlinearities of the column, the operating conditions were modified in accordance with the central composite design for the experiment, using the ratio between the light phase flow rate and the total flow rate, and the time interval between pulses. The effects on the purification factor and on total protein yield were modeled via neural networks. The best topology was defined as 16-9-2, and the input layer was a moving window of the independent variables. The neural model successfully...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bromelain; Reversed micelles; Extraction; Neural networks; Pineapple.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132010000200026

Extraction of red cabbage anthocyanins: optimization of the operation conditions of the column process
Provedor de dados: 52
Autores: Xavier,Marcelo Fonseca; Lopes,Toni Jefferson; Quadri,Mara Gabriela Novy; Quadri,Marintho Bastos.
The aim of this work was to extract anthocyanins from the red cabbage. Batch studies under several extraction conditions indicated that acetic acid in aqueous solution (10% V/V) was the best solvent, used in the proportion of 0.25 g of red cabbage mL-1. At this condition, column assays were carried out to evaluate the influence of the ionic force, pH, solvent flow rate, recirculated volume of red cabbage juice and the mass of red cabbage. Results showed that the pH, recirculation and mass of red cabbage had statistically significant effects, where the optimum operation conditions found for the process were pH 2.3, recirculation volume of the solvent 0.83 L and mass of red cabbage 50 g.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Anthocyanins; Extraction; Red cabbage; Experimental design; Optimization.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132008000100018

Purification and some properties of pectinesterase from potato (Solanum tuberosum L.) alpha cultivar
Provedor de dados: 52
Autores: Montañez Sáenz,Julio; Téllez,Alejandro; de la Garza,Heliodoro; de la Luz Reyes,María; Contreras-Esquivel,Juan Carlos; Aguilar,Cristóbal Noé.
Pectinesterase was extracted from potato alpha cultivar, purified and partially characterized The used protocol resulted in a 58.8-fold purification (51 850.2 units/mg protein) with 15.5% recovery of pectinesterase activity. The purified enzyme had a molecular weight of 27 kDa and its isoelectric point was around 4.5 with pH and temperature optima of 8.0 and 60°C, respectively. The purified enzyme had a single symmetric peak of specific activity after chromatographic steps. The homogeneity of the purified pectinesterase was confirmed by gel filtration and polyacrylamide electrophoresis gel.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Extraction; Purification; Properties; Pectinesterase; Potato.
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132000000400007

Extraction time for soybean isoflavone determination
Provedor de dados: 52
Autores: Carrão-Panizzi,Mercedes C.; Favoni,Silvana Pedroso de Goés; Kikuchi,Akio.
Studies were carried out on the optimization of the extraction procedures for isoflavones determination in soybean by HPLC. Isoflavones were extracted from 100 mg samples of full fat soybean flour "Kinako" (milled toasted grains). Recovery of average total isoflavones was higher when extraction was performed with agitation(217.2 mg/100g), than without agitation(191.0 mg/100g). Isoflavone extraction without agitation for 1,4, 20 and 24 hours, were equally efficient for total and individual compounds. These results suggested that an efficient isoflavone recovery could be achieved with extraction for one hour with agitation.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Soybeans; Isoflavones; Glucosides; Aglucones; Extraction; Ethanol; HPLC.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132002000600015

Characterization of Seed Oils of Pterodon emarginatus Vogel (Sucupira) Obtained by Different Extraction Methods
Provedor de dados: 52
Autores: Costa-Singh,Tainara; Jorge,Neuza.
Abstract The present study aims to evaluate the influence of extraction methods on the quality of bioactive compounds and antioxidant capacity in Pterodon emarginatusVogel (sucupira) oils. The oils were extracted from the sucupira seeds by Soxhlet and by the extraction system of Bligh &amp; Dyer. The oils were analyzed as to fatty acid profile, tocopherols, phytosterols, carotenoids, total phenolics, and total antioxidant capacity. The extraction by Soxhlet showed better yield of total lipids and was more efficient to extract tocopherols, phytosterols, and carotenoids, besides presenting better antioxidant activity by DPPH•. However, this method showed insufficient capacity to extract the polar lipid components of the sample, as evidenced by the low...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antioxidants; Bioactives; Extraction; Oxidative stability; Chromatography.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132019000100506

Extraction model of low methoxyl pectin from apple pomace effects of acid concentration and time on the process and the product
Provedor de dados: 52
Autores: Fertonani,Heloísa Cristina Ramos; Scabio,Ardalla; Carneiro,Eliana Beleski Borba; Schemim,Maria Helene Canteri; Nogueira,Alessandro; Wosiacki,Gilvan.
In Brazil, one of the top apple producing countries in the world, apple processing is an increasing activity, with pomace as the main by-product. To extract pectin from pomace, factors affecting process and product should be studied for optimization. A model to produce LMP directly from dried apple pomace was established observing the effects of HNO3 concentration and the time of reaction at 97ºC, analyzed from a statistical and practical point of view. The model for gravimetric yield (R² =0.9834) predicts the highest value of 20.07 g/100 g (126 mM; 14.07 min) of a pectin with a degree of esterification of 48.49%. The model for degree of esterification of extracted pectin (R²= 0.9797) predicts the lowest value of 43.73% (200 mM; 10.07 min) with a yield of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Apple; Pectin; Extraction; LMP; Nitric acid.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132009000100023

Development and optimization of extractives from Astronium urundeuva (allemão) Engl. by factorial design
Provedor de dados: 52
Autores: Cunha,Fabíola Pessoa da; Costa,Luana Janine Lopes da; Fernandes,Ana Josane Dantas; Souza,Tatiane Pereira de; Soares,Luiz Alberto Lira.
The purpose of this study was to evaluate the influences from variables of preparation on dry residue and total tannins from macerates of Astronium urundeuva barks. Thus, a 3 ² factorial design was used to study the importance of plant proportion (10, 15 and 20 %, w/v) and the ethanol concentration (40, 60 and 80 %, v/v) on the selected response. Mathematical models were fitted according to experimental data. The validated equations were used to generate response surfaces. The analysis of the surfaces showed that the optimum conditions to obtain extractive preparations with high extractive efficiency for tannins were: 10 % (w/v) of plant with ethanol 40 % (v/v) as solvent.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Astronium urundeuva; Extraction; Optimization; Factorial Design.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132009000300017

Extraction and in vitro antioxidant activity of exopolysaccharide by Pleurotus eryngii SI-02
Provedor de dados: 58
Autores: Sun,Xinyi; Hao,Long; Ma,Hua; Li,Tong; Zheng,Lan; Ma,Zhao; Zhai,Guoyin; Wang,Liqin; Gao,Shanglong; Liu,Xiaonan; Jia,Mengshi; Jia,Le.
The extraction parameters for Pleurotus eryngii SI-02 exopolysaccharide (EPS) produced during submerged culture were optimized using response surface methodology (RSM). The optimum conditions for EPS extraction were predicted to be, precipitation time 20.24 h, ethanol concentration 89.62% and pH 8.17, and EPS production was estimated at 7.27 g/L. The actual yield of EPS under these conditions was 7.21 g/L. The in vitro antioxidant results of the EPS showed that the inhibition effects of EPS at a dosage of 400 mg/L on hydroxyl, superoxide anion and 1,1-diphenyl-2-picrylhydrazyl (DPPH) radicals were 59.63 ± 3.72%, 38.69 ± 2.59%, and 66.36 ± 4.42%, respectively, which were 12.74 ± 1.03%, 8.01 ± 0.56%, and 12.19 ± 1.05% higher than that of butylated...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Pleurotus eryngii SI-02; Exopolysaccharide; Extraction; Antioxidant activity; In vitro.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822013000400009

Assessment of four different detergents used to extract membrane proteins from Xylella fastidiosa by two-dimensional electrophoresis
Provedor de dados: 58
Autores: Di Ciero,Luciana; Bellato,Cláudia de M.; Meinhardt,Lyndel W.; Ferrari,Fernanda; Castellari,Rafael R.; Marangoni,Sérgio; Novello,José C.
Four different detergents, ASB 14, SB 3-10, CHAPS and Triton X100, were utilized to determine the optimal detergent for the solubilization of membrane proteins from the phytopathogenic bacterium Xylella fastidiosa. These proteins were differentially solubilized in distinct buffers containing the detergent and subjected to bidimensional electrophoresis within the non-linear pH range of 3-10. The detergents ASB 14 and SB 3-10 were the most effective revealing 221 and 157 spots, respectively. CHAPS and Triton X100 were less effective and revealed only 72 and 43 spots, respectively. MALDI-TOF tryptic peptide mass fingerprinting of 18 excised proteins from the ASB 14 treatment revealed that 83% were membrane proteins and that the theoretical efficiency of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: X. fastidiosa; 2-DE; Extraction; Proteome; Solubilization.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822004000200018

Extraction of Soluble Polysaccharides from Grape Skins
Provedor de dados: 118
Autores: Gil Cortiella,Mariona; Peña-Neira,Álvaro.
Obtaining polysaccharides from grape cell walls is an interesting topic for the wine industry given its implications with regards to wine treatments and potential sensory attributes. In the present work, several conditions (i.e., a chelating agent, pH, titratable acidity, extraction time, number of successive extractions, solid to liquid ratio and alcoholic fermentation) were tested to assess their effects on the yield of soluble polysaccharides obtained from grape skins. Among the four tested solvents (i.e., water, tartaric acid, ammonium oxalate, and ethylenediaminetetraacetic acid), aqueous ammonium oxalate was the most effective for polysaccharide extraction but also produced the highest amount of protein impurities. Increasing the number of successive...
Tipo: Journal article
Palavras-chave: Carménère; Extraction; Grape skin polysaccharides; Pectin; Polysaccharides; Wine.
Ano: 2017
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202017000100009

Ultrasound pretreatment as an alternative to improve essential oils extraction
Provedor de dados: 65
Autores: 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