|
|
|
|
|
| COLNAGO, L. A.. |
| O conhecimento do teor de óleo em sementes e grãos é indispensável para procedimentos de seleção genética de variedades de milho, soja, amendoim etc., com alto teor de óleo, para se conhecer o potencial de produção dos grãos em agroindústrias de refinamento de óleo, para avaliar o valor energético dos alimentos, entre outros usos. A metodologia clássica de determinação do teor de óleo em sementes e grãos consiste em secá-los até peso constante, moagem até pó bem fino, extração exaustiva com solventes orgânicos em extratores soxhlet e evaporação do solvente até peso constante. Nesse método, o óleo é considerado como o material solúvel no solvente e não apenas os triglicerídeos. Esse é um processo demorado e que destrói as amostras analisadas. |
| Tipo: Circular Técnica (INFOTECA-E) |
Palavras-chave: Refinamento de óleo; Valor energético; Ressonância magnética nuclear; RMN; Soxhlet. |
| Ano: 1996 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/27416 |
| |
|
| |
|
|
| Aboonajmi, Mohammad; Ghorbani, Marzieh; Ghorbani Javid, Majid; Arabhosseini, Akbar. |
| The main objective of this study was to compare ultrasound assisted extraction with soxhlet extraction method as control in the extraction ascorbic acid of fennel seeds. Treatment conditions were performed using soxhlet method (240 min at 85 °C) and ultrasound treatment (20 kHz, 39, 64 and 96 W/cm2, 40 and 60 °C), for 15, 30 and 45 min. No significant differences were observed for total soluble solids among the samples studied. A similar trend was observed for both the amount of ascorbic acid extract and its ability to DPPH free radical scavenging. The greatest amount of ascorbic acid obtained in 15 minutes sonication (96 W/cm2 at 60 °C), with equivalent of 1.73 mg/ml fennel seeds extraction. There was a significant difference between soxhlet and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ultrasound-assisted extraction; Ascorbic acid; Soxhlet. |
| Ano: 2018 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/4328 |
| |
|
|
| Rossato,Roberta; Prete,Cássio Egídio Cavenaghi; Castro,César de; Tomm,Gilberto Omar; Leite,Rodrigo Santos; Mandarino,José Marcos Gontijo; Araújo,Pedro Mário de; Carvalho,Claudio Guilherme Portela de. |
| The objective of this work was to establish a calibration equation and to estimate the efficiency of near-infrared reflectance (NIR) spectroscopy for evaluating rapeseed oil content in Southern Brazil. Spectral data from 124 half-sib families were correlated with oil contents determined by the chemical method. The accuracy of the equation was verified by coefficient of determination (R²) of 0.92, error of calibration (SEC) of 0.78, and error of performance (SEP) of 1.22. The oil content of ten genotypes, which were not included in the calibration with NIR, was similar to the one obtained by the standard chemical method. NIR spectroscopy is adequate to differentiate oil content of rapeseed genotypes. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Brassica napus; NIR; Oilseed; Soxhlet; Spectral analysis. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2013001200010 |
| |
|
|
|
