Abstract
Objective: The aim of this study was to prepare powder from liquid extract with maltodextrin dextrose equivalent 10–15 as a stabilizer using a freezedryingmethod to maintain stability during drying process and extend storage time.Methods: Powders were prepared for four formulas: F1 (without maltodextrin), F2 (2.5% maltodextrin), F3 (5% maltodextrin), and F4 (10%maltodextrin). Powder from the four formulas was characterized by its phlorotannin concentration, antioxidant activity, water content, morphology,particle size distribution, pH, and organoleptic activities.Results: F4 was the best formula because it contained the highest phlorotannin concentration (113.06±1.36) or 0.25%, highest percentage ofinhibition concentration50 (IC50) (4.06% at a concentration of 5000 ppm), and lowest water content (5.16%); moreover, in a stability test, F4 exhibiteda more stable phlorotannin concentration and lower water content than F1, with an optimal storage temperature of 4°C.Conclusion: Maltodextrin can improve the stability bioactive compounds during the freeze-drying process and storage time.
Highlights
Seaweed is a component of the ecosystem along the coasts of Indonesia [1]
One type of brown seaweed found along the coast of Indonesia is Sargassum spp., such as Sargassum plagyophyllum
Among many bioactive compounds contained in brown seaweed including Sargassum sp., antioxidants are interesting because they are key compounds in treating various degenerative diseases and for preventing aging
Summary
Seaweed is a component of the ecosystem along the coasts of Indonesia [1]. It can be divided into green seaweed or Chlorophyta, brown seaweed or phaeophyta, and red seaweed or Rhodophyta [2]. Brown seaweed has a higher level of bioactive compounds than the two other types [3]. One type of brown seaweed found along the coast of Indonesia is Sargassum spp., such as Sargassum plagyophyllum. Among many bioactive compounds contained in brown seaweed including Sargassum sp., antioxidants are interesting because they are key compounds in treating various degenerative diseases and for preventing aging. Natural antioxidants in seaweed come from phlorotannin compounds, ascorbic acid, tocopherol, and carotenoid. Various studies have revealed that phlorotannin is an antioxidant compound that plays the most important role in photoprotection in seaweed [4]
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