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...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Rojas, Ana María Luisa, Campos, Carmen Adriana, Gerschenson, Lía Noemí
Publicado:	2003
Materias:	Air-drying Color Osmosis Porphyra Texture algae Columbina
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00236438_v36_n4_p415_ValenciaRodriguez http://hdl.handle.net/20.500.12110/paper_00236438_v36_n4_p415_ValenciaRodriguez
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	paper:paper_00236438_v36_n4_p415_ValenciaRodriguez
record_format	dspace
spelling	paper:paper_00236438_v36_n4_p415_ValenciaRodriguez2023-06-08T14:51:41Z Effect of osmotic dehydration on the quality of air-dried Porphyra Rojas, Ana María Luisa Campos, Carmen Adriana Gerschenson, Lía Noemí Air-drying Color Osmosis Porphyra Texture algae Columbina 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 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. Fil:Rojas, A.M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Campos, C.A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Gerschenson, L.N. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2003 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00236438_v36_n4_p415_ValenciaRodriguez http://hdl.handle.net/20.500.12110/paper_00236438_v36_n4_p415_ValenciaRodriguez
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Air-drying Color Osmosis Porphyra Texture algae Columbina Porphyra
spellingShingle	Air-drying Color Osmosis Porphyra Texture algae Columbina Porphyra Rojas, Ana María Luisa Campos, Carmen Adriana Gerschenson, Lía Noemí Effect of osmotic dehydration on the quality of air-dried Porphyra
topic_facet	Air-drying Color Osmosis Porphyra Texture algae Columbina Porphyra
description	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.
author	Rojas, Ana María Luisa Campos, Carmen Adriana Gerschenson, Lía Noemí
author_facet	Rojas, Ana María Luisa Campos, Carmen Adriana Gerschenson, Lía Noemí
author_sort	Rojas, Ana María Luisa
title	Effect of osmotic dehydration on the quality of air-dried Porphyra
title_short	Effect of osmotic dehydration on the quality of air-dried Porphyra
title_full	Effect of osmotic dehydration on the quality of air-dried Porphyra
title_fullStr	Effect of osmotic dehydration on the quality of air-dried Porphyra
title_full_unstemmed	Effect of osmotic dehydration on the quality of air-dried Porphyra
title_sort	effect of osmotic dehydration on the quality of air-dried porphyra
publishDate	2003
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00236438_v36_n4_p415_ValenciaRodriguez http://hdl.handle.net/20.500.12110/paper_00236438_v36_n4_p415_ValenciaRodriguez
work_keys_str_mv	AT rojasanamarialuisa effectofosmoticdehydrationonthequalityofairdriedporphyra AT camposcarmenadriana effectofosmoticdehydrationonthequalityofairdriedporphyra AT gerschensonlianoemi effectofosmoticdehydrationonthequalityofairdriedporphyra
_version_	1768542774248865792

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

Ejemplares similares