Physicochemical Characteristics of Date Sap Lagmi from Deglet Nour Palm (Phoenix Dactylifera L.)

[en] Physicochemical properties of sap from Deglet Nour date palm (Phoenix dactylifera L.) were studied. Composition analysis revealed (on a dry-weight basis) a high content of carbohydrates (94.98 g/100 g of dry matter basis) mainly sucrose, 2.72 g/100g (dry matter basis) of proteins and 2.29 g/100 g (dry matter basis) of ash. Date palm sap also contains 7.64 mg gallic acid equivalent/100 ml of total polyphenol. Thus, date palm sap showed antioxidant activity with a percentage inhibition of the DPPH radical value of 47.64%. Surface and foaming properties were also performed by drop volume and bubbling method, respectively. Equilibrium surface tension of fresh sap was 63.51 mN/m. Freeze-drying method preserved surface activity. Native sap showed better foam power (1.03) and foam stability (1150 s) than solutions prepared from lyophilised sap (5-30 g /100g of solution). Results demonstrated that this natural juice could be regarded as functional food due to its high nutritional value, antioxidant activity, surface activity, and foam power.

Disciplines :

Food science

Author, co-author :

Ben Thabet, Imene

Besbes, Souhail

Attia, Hamadi

Deroanne, Claude

Francis, Frédéric ; Université de Liège - ULiège > Gembloux Agro-Bio Tech

Drira, Nour*-Eddine

Blecker, Christophe ; Université de Liège - ULiège > Gembloux Agro-Bio Tech

Language :

English

Title :

Physicochemical Characteristics of Date Sap Lagmi from Deglet Nour Palm (Phoenix Dactylifera L.)

Publication date :

2009

Journal title :

International Journal of Food Properties

ISSN :

1094-2912

eISSN :

1532-2386

Publisher :

Taylor & Francis Ltd

Volume :

Issue :

Pages :

659-670

Peer reviewed :

Peer Reviewed verified by ORBi

Available on ORBi :

since 17 May 2010

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