Inulin suitable as reduced-kilojoule carrier for production of microencapsulated spray-dried green Cyclopia subternata (honeybush) extract

Phenolic and physicochemical stability of a functional beverage powder mixture during storage: effect of the microencapsulant inulin and food ingredients

“…The BET model was found suitable ( R 2 > 0.95) to describe the relationship between the a w and moisture content of all treatments (Table ). The MSIs of T1 and T2 were identical to that of the pure spray‐dried extract and extract spray‐dried with 250 g kg −1 inulin previously reported by Pauck et al …”

“…The pure spray‐dried honeybush extract, and the extract microencapsulated with inulin, were in an amorphous state, as reported previously . Changes in this physical state during storage could lead to caking of the powders .…”

“…The inulin content of the spray‐dried powder was thus limited to 250 g kg −1 for incorporation into honeybush iced tea powder mixtures. This microencapsulated powder was previously shown to have desirable physicochemical characteristics . Formulation of the iced tea powder mixture was guided by the formulation of an RTD green rooibos iced tea, comprising 1.75 g L −1 rooibos extract, 1.2 g L −1 citric acid, 0.2 g L −1 ascorbic acid and 60 g L −1 sucrose.…”

Microencapsulation of phenolic compounds: Technologies and novel polymers

“…In another study, it was confirmed the retention of phenolic compounds during spray-drying of Cyclopia subternata extract using corn syrup solids and inulin separately (Pauck et al, 2017). The results showed that both microencapsulations were very similar; in the case of the phenolic compounds, specifically the thermolabile ones mangiferin, isomangiferin and iriflophenone 3-C-β-D-glucopyranoside, the spray drying had not affect, probably due to both wall materials used.…”

“…Consequently, to maintain phenolic compounds safe from external (e.g., environment) and internal (e.g., gastrointestinal) degradation, microencapsulation could be a good option to protect and manage those molecules (Fang and Bhandari, 2010). There are reports that describe different techniques to microencapsulate phenolic compounds like Fang and Bhandari (2010), while Bartkowiak et al (2017a) and others present the use of novel polymers such as Aloe vera mucilage (Medina-Torres et al, 2018), psyllium husk mucilage (Álvares- Monge-Neto et al, 2017) or microencapsulation with inulin (Pauck et al, 2017). However, despite all this information, there are few specific reports that focus on the microencapsulation of polyphenols using novel materials, being this an opportunity to show the current state-of-the-art in this important field.…”