Optimising the Encapsulation of an Aqueous Bitter Melon Extract by Spray-Drying

Abstract

Our aim was to optimise the encapsulation of an aqueous bitter melon extract by spray-drying with maltodextrin (MD) and gum Arabic (GA). The response surface methodology models accurately predicted the process yield and retentions of bioactive concentrations and activity (R2 > 0.87). The optimal formulation was predicted and validated as 35% (w/w) stock solution (MD:GA, 1:1) and a ratio of 1.5:1 g/g of the extract to the stock solution. The spray-dried powder had a high process yield (66.2% ± 9.4%) and high retention (>79.5% ± 8.4%) and the quality of the powder was high. Therefore, the bitter melon extract was well encapsulated into a powder using MD/GA and spray-drying.

The effect of encapsulated plant extract of hyssop (Hyssopus officinalis L.) in biopolymer nanoemulsions of Lepidium perfoliatum and Orchis mascula on controlling oxidative stability of soybean oil

“…If some of the moisture remains inside the nanocapsules, their structure changes from smooth to intense and rough state (Tonon, Brabet, & Hubinger, 2008). Tan, Kha, Parks, Stathopoulos, and Roach (2015) showed a similar morphology of the melan extracts in nanocapsules of maltodextrin and arabic gum coatings.…”

Microencapsulation of sea buckthorn (Hippophae rhamnoides L.) pulp oil by spray drying

“…It was also shown that the microcapsules with surface dents occupied a large proportion. Many studies had confirmed that the drying temperature taken an important effect on the morphology of microcapsules (Janiszewska & Witrowa-Rajchert, 2009;Mestry, Mujumdar, & Thorat, 2011;Nijdam & Langrish, 2006;Tan et al, 2015;Tonon, Brabet, & Hubinger, 2008). At high drying temperatures, the moisture of the particles evaporated quickly, resulting to most of particles having a smooth and hard outer shell.…”

“…However, its high cost, limited supply, has restricted the use of GA. Maltodextrin (MD) can ameliorate the oxidation resistance of encapsulated oil but have the disadvantage of poor emulsion stability and low microencapsulation efficiency (ME) (Gharsallaoui, Saurel, & Chambin, 2012). The combination of GA and MD had been applied to the encapsulation of bitter melon extract (Tan, Kha, Parks, Stathopoulos, & Roach, 2015), soy oil (McNamee, O’Riordan, & O’Sullivan, 2001), fatty acids (Minemoto, Hakamata, Adachi, & Matsuno, 2002), and flavor (Apintanapong & Noomhorm, 2003). These results had shown that the combination of GA and MD could give play to their respective characteristics and make up each other's shortcomings, which reduced costs and improved product quality.…”

Effects of Spray-Drying Temperatures and Ratios of Gum Arabic to Microcrystalline Cellulose on Antioxidant and Physical Properties of Mulberry Juice Powder

“…To investigate the influences of different temperatures on the quality of spray-dried mulberry juice powder, the mulberry juice was mixed with maltodextrin and gum Arabic at the ratio of 7:3 (w/w) [32] and then spray-dried with the constant feed flow rate of 8 rpm at different temperatures (120 • C, 130 • C, 140 • C and 150 • C, 160 • C), as described by Fazaeli et al [11] with slight modification.…”