Effect of glandless cottonseed meal protein and maltodextrin as microencapsulating agents on spray‐drying of sugarcane bagasse phenolic compounds

Abstract

This study examines the effect of different concentrations of glandless cottonseed meal protein (GCSMP) and maltodextrin (MD) as microencapsulating agents on the shelf life stability of phenolic compounds extracted from sugarcane bagasse (SCB). Sugarcane bagasse showed high antioxidant activity, which remained stable after 30 days of storage at 4 • C. The best microencapsulation process was obtained with an MD and GCSMP ratio of 63.6% and 36.4%, respectively. The encapsulating agents' ratio affected the encapsulation efficiency (EE) (p < 0.05), while the spray-drying temperature did not show an effect on the EE of the SCB phenolic compounds (p > 0.05). The antioxidant activity of the microencapsulated phenolic compounds was affected by the MD/GCSMP ratio (p < 0.05). The combination of MD and GCSM showed a higher EE than MD (p < 0.05), while the EE was lower when the ratio of encapsulating agents consisted of either MD or GCSMP alone (p < 0.05). The total phenolic content (TPC) in the microcapsules was not affected by the GCSMP ratio (p < 0.05). The TPC of microencapsulated phenolic compounds was stable up to 100 • C for 14 days.GCSMP containing microcapsules showed a corrugated surface compared to a more homogenized surface of MD. The resulting corrugated structure explains the higher EE showed by the GCSMP.

Characterization of the Nonpolar and Polar Extractable Components of Glanded Cottonseed for Its Valorization

“…Whereas cottonseed is a natural resource of agrochemicals (e.g., fiber, proteins, carbohydrates, and lipids), its nutritional value is hindered by the presence of a toxic chemical (i.e., gossypol) in the conventional glanded (Gd) cottonseed [ 5 , 14 ]. The current strategies of valorization of cottonseed include (1) the development of novel Gl cottonseed varieties for food applications [ 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 ], (2) synthesis and formulation of biobased materials from traditional Gd cottonseed and its byproducts for nonfood applications [ 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 ], and (3) exploration of the bioactive components in cottonseed for nutritive, health, and medical applications [ 31 , 32 , 33 , 34 , 35 , 36 , 37 ]. While these bioactive components are assumed to be peptide fragments, polyphenolics, and/or flavonoids, the specific functional groups or compounds are yet to be identified [ 33 , 38 , 39 , 40 , 41 ].…”