Acacia Gum as a Natural Anti-Plasticizer for the Production of Date Syrup Powder: Sorption Isotherms, Physicochemical Properties, and Data Modeling

The thermoplastic and hygroscopic behaviors of date syrup (DS) challenge the DS drying process. In this context, DS was mixed with 30%, 40%, 50%, and 60% acacia gum (AG) and subjected to a drum dryer. The chemical composition, bulk density ( ), caking degree (CD), glass transition temperature (Tg),...

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Bibliographic Details
Published in:Foods 2020-01, Vol.9 (1), p.50
Main Authors: Mansoori, Nasim, Majzoobi, Mahsa, Gavahian, Mohsen, Badii, Fojan, Farahnaky, Asgar
Format: Article
Language:English
Subjects:
acacia gum
anti-plasticizer
Antiplasticizers
Bulk density
Caking
Chemical composition
date powder
date syrup
Drying
Food science
Glass transition temperature
Glucose
Gums
Investigations
Isotherms
Laboratories
Mathematical models
modeling
Moisture content
palm date
phoenix dactylifera
Physicochemical properties
Plasticizers
powder stability
Sorption
sorption isotherm
Sucrose
Syrup
Transition temperatures
Water content
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Summary:The thermoplastic and hygroscopic behaviors of date syrup (DS) challenge the DS drying process. In this context, DS was mixed with 30%, 40%, 50%, and 60% acacia gum (AG) and subjected to a drum dryer. The chemical composition, bulk density ( ), caking degree (CD), glass transition temperature (Tg), and color values of DS powders were studied. The sorption isotherms were also obtained and compared to that of those predicted by mathematical models. According to the results, increasing the AG concentration enhanced the moisture content, , brightness, and Tg while it reduced the CD and equilibrium moisture sorption. All DS powders had type III isotherm behavior, i.e., similar to high-sugar foods. Guggenheim-Anderson-de Boer (GAB) and Peleg models were found to be suitable for fitting the experimental data and these models explained the monolayer moisture content decrease with increasing AG concentration. These results of the present study, for the first time, verified that the AG can be used as a natural anti-plasticizer agent for DS powder production.
ISSN:2304-8158
2304-8158
DOI:10.3390/foods9010050