Effect of ultrafiltration process on physico-chemical, rheological, microstructure and thermal properties of syrups from male and female date palm saps
| Autor: | Souhail Besbes, Hamadi Attia, Samia Baklouti, Christophe Blecker, Manel Masmoudi, Sabine Danthine, Ines Makhlouf-Gafsi, Abir Mokni |
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| Rok vydání: | 2015 |
| Předmět: |
Chromatography
Shear thinning Chemistry Plant Extracts Viscosity Ultrafiltration Phoeniceae Temperature 04 agricultural and veterinary sciences General Medicine Permeation Microstructure 040401 food science Analytical Chemistry Shear rate Beverages 0404 agricultural biotechnology Chemical engineering Rheology Cooling curve Nutritive Value Food Science |
| Zdroj: | Food chemistry. 203 |
| ISSN: | 1873-7072 |
| Popis: | This study investigates the effect of the ultrafiltration process on physicochemical, rheological, microstructure and thermal properties of syrups from male and female date palm sap. All the studied syrups switched from pseudoplastic rheological behaviour (n=0.783) to Newtonian behaviour (n∼1) from 10 to 50 °C respectively and present similar thermal profiles. Results revealed that the ultrafiltration process significantly affects the rheological behaviour of the male and female syrups. These differences on rheological properties are attributed to the variation of chemical composition between sap and sap permeate syrups. Furthermore, the effect of temperature on viscosity of the syrups was investigated during heating and cooling processes at the same shear rate (50s(-1)). This study provides idea of the stability of the syrup by evaluating the area between heating and cooling curves. Actually, the syrup prepared from male sap permeate is the most stable between the four studied syrups. |
| Databáze: | OpenAIRE |
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