Effect of osmotic dehydration on the quality of air-dried Porphyra

Osmosis with a solution of NaCl and sucrose to depress the water activity (aw) to 0.970 and the pH to 3.0 was assayed as a pretreatment to air-drying of red seaweeds (Porphyra columbina Montagne). Air-drying was performed at 30°C and 14% relative humidity. Process characteristics, color, flow patter...

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Autor principal: Valencia Rodriguez, T.
Otros Autores: Rojas, A.M, Campos, C.A, Gerschenson, L.N
Formato: Capítulo de libro
Lenguaje:Inglés
Publicado: Academic Press 2003
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030 |a LBWTA 
100 1 |a Valencia Rodriguez, T. 
245 1 0 |a Effect of osmotic dehydration on the quality of air-dried Porphyra 
260 |b Academic Press  |c 2003 
270 1 0 |m Gerschenson, L.N.; Departamento de Industrias, Fac. de Ciencias Exactas y Naturales, Universidad de Buenos Aires, (1428) Buenos Aires, Argentina; email: lia@di.fcen.uba.ar 
506 |2 openaire  |e Política editorial 
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520 3 |a Osmosis with a solution of NaCl and sucrose to depress the water activity (aw) to 0.970 and the pH to 3.0 was assayed as a pretreatment to air-drying of red seaweeds (Porphyra columbina Montagne). Air-drying was performed at 30°C and 14% relative humidity. Process characteristics, color, flow pattern and rehydration ability of the milled product, were evaluated to determine the usefulness of osmosis. The aw attained after 2 h of drying was similar for both osmosed and nonosmosed Porphyra and higher than monolayer water activity for both products. Consequently, no additional benefits concerning stability during storage were observed, after applying osmosis. Moreover, severe changes in color occurred. Powder flowability evaluated through the measurement of compressibility and cohesiveness decreased with pretreatment, which also determined a more plastic behavior. In summary, osmotic dehydration as a pretreatment for air-dried seaweeds did not seem to improve the final product quality. © 2003 Swiss Society of Food Science and Technology. Published by Elsevier Science Ltd. All rights reserved.  |l eng 
536 |a Detalles de la financiación: Consejo Nacional de Investigaciones Científicas y Técnicas 
536 |a Detalles de la financiación: Consejo Nacional de Investigaciones Científicas y Técnicas 
536 |a Detalles de la financiación: We acknowledge the financial support from Universidad de Buenos Aires and Consejo Nacional de Investigaciones Cientı́ficas y Técnicas de la República Argentina (CONICET). 
593 |a Departamento de Industrias, Fac. de Ciencias Exactas y Naturales, Universidad de Buenos Aires, (1428) Buenos Aires, Argentina 
690 1 0 |a AIR-DRYING 
690 1 0 |a PORPHYRA 
690 1 0 |a TEXTURE 
690 1 0 |a ALGAE 
690 1 0 |a COLUMBINA 
690 1 0 |a PORPHYRA 
650 1 7 |2 spines  |a COLOR 
650 1 7 |2 spines  |a OSMOSIS 
700 1 |a Rojas, A.M. 
700 1 |a Campos, C.A. 
700 1 |a Gerschenson, L.N. 
773 0 |d Academic Press, 2003  |g v. 36  |h pp. 415-422  |k n. 4  |p LWT - Food Sci. Technol.  |x 00236438  |w (AR-BaUEN)CENRE-292  |t LWT - Food Science and Technology 
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