INVESTIGADORES
DEMARCHI Silvana Maria
artículos
Título:
Effect of hot air, vacuum and infrared drying methods on quality of rose hip (Rosa rubiginosa) leathers
Autor/es:
QUINTERO RUIZ, NATALIA A.; DEMARCHI, SILVANA M.; GINER, SERGIO A.
Revista:
INTERNATIONAL JOURNAL OF FOOD SCIENCE AND TECHNOLOGY
Editorial:
WILEY-BLACKWELL PUBLISHING, INC
Referencias:
Lugar: Londres; Año: 2014 vol. 49 p. 1799 - 1804
ISSN:
0950-5423
Resumen:
For the development of fruit leathers, a formulation containing rose hip pulp, sucrose and citric acid was used as initial material for the drying process. Three dehydration techniques were tested: forced hot air, infrared and vacuum, all carried out at 60 and 70 °C. All methods led to flexible, translucent fruit leathers at both temperatures. Colour and water activity were not affected by the dehydration method nor by the temperatures tested. Nutritional parameters such as antioxidant capacity (TEAC) and content of phenolic substances were measured. The best retention was achieved with vacuum drying at 60 °C being of 57.5% and 25.1%, respectively. ESEM observations were conducted to assess the effect of drying methods and conditions on microstructure of leathers. Various extents of sucrose crystallisation were inferred from surface images. Cross-sectional micrographs showed that the size of pores was affected by the drying technique but not by temperature in the range studied.