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Food Science and Technology International
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Influence of processing and storage conditions in strawberry jam color / Influencia de las condiciones de tratamiento y de almacenamiento en el color de confituras de fresa

C. García-Viguera

Laboratorio Fitoquimica, Departamento Ciencia y Tecnología de Alimentos, CEBAS-CSIC, Apdo Correos 4195, 30080 Murcia, Spain

P. Zafrilla

Laboratorio Fitoquimica, Departamento Ciencia y Tecnología de Alimentos, CEBAS-CSIC, Apdo Correos 4195, 30080 Murcia, Spain

F.A. Tomás-Barberán

Laboratorio Fitoquimica, Departamento Ciencia y Tecnología de Alimentos, CEBAS-CSIC, Apdo Correos 4195, 30080 Murcia, Spain

The influence of time and temperature of processing on the color of strawberry jams, and the time and presence of light during their storage is evaluated. Results showed that processing time is the determinant for obtaining color quality products, as boiling for over 15 min has a deleterious effect. The effect of daylight during storage caused insignificant color and anthocyanin losses, when com pared with storage under dark conditions. However, there was no direct relationship between antho cyanin loss during processing and storage and the color observed under any of the assayed condi tions. The freezing of fruit for long periods (one year) for future jam preparation provoked 77% of anthocyanin losses. Nevertheless, fruit could be stored at -20°C for six months, since less than 20% loss of anthocyanins was noted.

Key Words: strawberry • jams • processing • color • anthocyanins • browning • storage

Food Science and Technology International, Vol. 5, No. 6, 487-492 (1999)
DOI: 10.1177/108201329900500606
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