| Popis: |
Films for potential food use were prepared from aqueous solutions of β-glucan extracted from hulled barley, hull-less barley, and oats. The extracts (75.2–79.3% β-glucan) also contained proteins, fat, and ash. Glycerol was used as a plasticizer. The films were translucent, smooth, and homogeneous in structure on both sides. Water vapor permeability of films prepared from 4% solutions of β-glucan extracts were higher than those from 2% solutions, despite similar values for water vapor transmission rate. Mechanical properties were influenced by both β-glucan source and concentration. The oat β-glucan films showed higher tensile strength and water solubility, and lower color, opacity, and deformation values than those of barley. Films prepared from hull-less barley cv. HLB233 remained intact upon immersion in water for 24 hr. |
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