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| Risso,Fernanda Vaz Alves; Mazutti,Marcio Antonio; Treichel,Helen; Costa,Fátima; Maugeri,Francisco; Rodrigues,Maria Isabel. |
| This work investigated the fructooligosaccharides (FOS) synthesis by immobilized inulinase obtained from Kluyveromyces marxianus NRRL Y-7571 in aqueous and aqueous-organic systems using sucrose as substrate. The sequential strategy of experimental design was used to optimize the FOS conversion in both systems. For the aqueous-organic system, a 2(6-2) fractional design was carried out to evaluate the effects of temperature, sucrose concentration, pH, aqueous/organic ratio, enzyme activity, and polyethylene glycol concentration. For the aqueous system, a central composite design for the enzyme activity and the sucrose concentration was carried out. The highest fructooligosaccharides yield (Y FOS) for the aqueous-organic system was 18.2 ± S0.9 wt%, at 40 ºC,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Immobilized inulinase; Fructooligosaccharides synthesis; Kluyveromyces marxianus NRRL Y-7571. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612012000200006 |
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| Vissotto,Fernanda Zaratini; Giarola,Raquel Carolina; Jorge,Lívia Calegari; Makita,Gisele Tokie; Cardozo,Gina Maria Bueno Quirino; Rodrigues,Maria Isabel; Menegalli,Florencia Cecilia. |
| In this study, the morphological characteristics of cocoa beverage powder granules under minimal, average, and maximal process conditions of a steam agglomerator were studied. a stereoscopic microscope coupled to a digital camera was used for the morphological analysis. The images were analyzed to obtain shape and size descriptors. aiming to evaluate the descriptors, 150 particles were analyzed. The results showed that there was no difference between the shape descriptors - compacity, circularity, roughness, and aspect ratio - in the operating conditions evaluated. It was observed that the cocoa beverage powder granules are elongated in shape. The size descriptors, area, perimeter, perimeter of convex bounding polygon, minimal and maximal Feret diameter,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Agglomeration; Steam; Cocoa beverage powder; Morphological analysis; Particle shape; Particle size. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612014000400001 |
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