Softening of Overdried 'Deglet Nour' Dates to Obtain High-Standard Fruits: Impact of Rehydration and Drying Processes on Quality Criteria

被引:13
作者
Boubekri, Abdelghani [2 ]
Benmoussa, Hocine [3 ]
Courtois, Francis [1 ,4 ]
Bonazzi, Catherine [1 ,4 ]
机构
[1] AgroParisTech, Ingn Procedes Aliments UMR1145, F-91300 Massy, France
[2] Univ Ouargla, Dept Mech Engn, Ouargla, Algeria
[3] Univ Batna, Dept Mech Engn, Batna, Algeria
[4] INRA, Ingn Procedes Aliments UMR1145, Massy, France
关键词
Color; Postharvest treatments; Soaking; Sugars; Texture; PALM; LAYER; PRETREATMENT; DEHYDRATION;
D O I
10.1080/07373930903526764
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
The postharvest hydrothermal treatment of date palm fruit was studied in order to enhance the quality and consumer acceptance of 'Deglet Nour' hard dates, because these dates are unfit for direct consumption. Hot water hydration was performed by soaking at 25, 45, and 65 degrees C and convective hot air drying at 35, 45, 60, 75, and 85 degrees C at various levels of air humidity. Numerous quality parametersi.e., texture, color, moisture and sugar contentswere investigated. Artificial maturation due to the softening of texture and the equilibration of sugars was achieved using the hydration pretreatment. A 6-h soaking at 45 degrees C could be the best option to obtain a product of highest quality, but the moisture content would exceed that required for safe storage. Drying and quality tests led to the selection of a pretreatment step of soaking at 30 degrees C for 8h, followed by drying at an intermediate temperature (60 degrees C) as the optimum condition to obtain a final product of high quality with the standard moisture content of 0.35kg/kg d.b.
引用
收藏
页码:222 / 231
页数:10
相关论文
共 44 条
[1]  
Achour Mohsen, 2005, Fruits, V60, P41, DOI 10.1051/fruits:2005011
[2]  
Al-Shahib W, 2003, INT J FOOD SCI NUTR, V54, P247, DOI 10.1080/096374803766666120
[3]  
ALBEKR AJ, 1972, DATE PALM REV ITS PA
[4]   Objective color measurement of fresh date fruits and processed date products [J].
AlHooti, S ;
Sidhu, JS ;
Qabazard, H .
JOURNAL OF FOOD QUALITY, 1997, 20 (03) :257-266
[5]   Vacuum drying of common date pulp cubes [J].
Amellal, Hayet ;
Benamara, Salem .
DRYING TECHNOLOGY, 2008, 26 (03) :378-382
[6]   Increasing the rate of ripening of date palm fruit (Phoenix dactylifera L.) cv. Helali by preharvest and postharvest treatments [J].
Awad, Mohamed A. .
POSTHARVEST BIOLOGY AND TECHNOLOGY, 2007, 43 (01) :121-127
[7]  
AZIZA BM, 1986, J SCI FOOD AGR, V37, P43
[8]  
BARREVELD WH, 1993, AGR SERVICE B, V101
[9]  
BELARBI A, 2001, THESIS ENSIA MASSY
[10]   Evolution of pectins and polygalacturonase activities during maturation of date Deglet-nour [J].
Benchabane, A. ;
Abbeddou, S. ;
Bellal, M. M. ;
Thibault, J. -F. .
SCIENCES DES ALIMENTS, 2006, 26 (03) :233-246