Abstract
Objective: This study aimed to determine the stability of microspheres of Sargassum plagyophyllum (brown seaweed) after preparation using spraydrying with maltodextrin DE 10–15 and during drying and storage.Methods: Aqueous extracts of brown seaweed were formulated into microspheres using maltodextrin DE 10–15 as a coating agent. For increasing thestability of polyphenol compounds, spray drying was performed with an inlet temperature of 110°C. Four microsphere formulations were producedusing maltodextrin DE 10–15 at concentrations of 0%, 5%, 10%, and 15%. The resulting microspheres were then characterized in the assessments ofmoisture contents, particle size distributions, pH, total phlorotannin contents, and antioxidant activity, and surface morphology was analyzed usingscanning electron microscope analyses.Results: Powders that were produced with 0% and 15% maltodextrin were more stable at 4°C±2°C than at 28°C±2°C and 40°C±2°C. At the lowesttemperature, phlorotannin contents were maintained in powders that were prepared with 15% maltodextrin but were decreased by 10% in powdersthat were prepared without maltodextrin.Conclusion: Maltodextrin DE 10–15 is a suitable coating agent for dry formulations of S. plagyophyllum powder and maintained stability during spraydrying at 110°C and during storage for 2 months at 4°C±2°C.
Highlights
Sargassum plagyophyllum is a brown marine macroalgae (Phaeophyta) that is frequently found in tropical and subtropical countries, such as Indonesia, Malaysia, Thailand, and Vietnam [1]
Macerates were filtered to produce the aqueous extracts of S. plagyophyllum, which were characterized for pH, total phlorotannin contents, and antioxidant activity
Analyses of S. plagyophyllum aqueous extracts Total phlorotannin contents To develop the analytical procedure, we compared solvent extraction with 25%, 50%, and 75% (v/v) ethanol and demineralized water and found that polyphenol extraction from seaweeds is best achieved with demineralized water
Summary
Sargassum plagyophyllum is a brown marine macroalgae (Phaeophyta) that is frequently found in tropical and subtropical countries, such as Indonesia, Malaysia, Thailand, and Vietnam [1]. Like other polyphenols, phlorotannin is sensitive to environmental conditions, including temperature, light, pH, moisture, and oxygen contents, and is susceptible to degradation during product processing and storage [7]. Spray drying is the most widely used process for drying liquids and extracts and has advantages of short contact times with drying medium, high rates of evaporation, and relatively low costs, leading to higher quality products than those produced using conventional drying methods [8]. Spray drying technologies have been widely exploited in the food industry and are used for producing large quantities of microcapsules. Even though spray drying is widely used for producing food powders, some quality losses are associated with the high operating temperatures required
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