کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4563286 | 1628525 | 2016 | 8 صفحه PDF | دانلود رایگان |
• Stability of β-carotene during GI transit was improved by nanoentrapment.
• Nano-entrapped β-carotene in zein NPs was protected until release.
• Nano-enabled improvement in stability and antioxidant activity was less in milk.
• Zein nanoparticles proved superior to nanoemulsions for nanodelivery of β-carotene.
The addition of nanoentrapped β-carotene in milk is proposed as a valid method to improve stability and enhance antioxidant activity of β-carotene during GI transit. This study focused on two types of delivery systems, nanoparticles and nanoemulsions, and compared their ability to enhance the physicochemical stability and antioxidant activity of β-carotene in the presence of milk under simulated GI conditions. β-Carotene-loaded zein nanoparticles and nanoemulsion, stabilized by pluronic F127 and lecithin, were synthesized and added to liquid milk. Degradation of β-carotene was spectrophotometrically analyzed, and antioxidant activity was measured using ABTS and TBARS assays in simulated gastric fluid (SGF) with pepsin for 2 h and in simulated intestinal fluid (SIF) with pancreatin for 24 h. The initial amount of β-carotene remained at 18.30 ± 1.29% and 4.41 ± 2.51% after a 26 h total time of GI exposure in nanoentrapped and emulsified forms, respectively. In both systems, nanoentrapment proved to be beneficial to beta-carotene stability, but this benefit was decreased in the presence of milk. The improvement in antioxidant activity of nanodelivered β-carotene was confirmed by ABTS and TBARS assays. In conclusion, zein nanoparticles improved chemical stability and antioxidant activity of entrapped beta-carotene versus emulsions in the presence of milk under simulated gastrointestinal environments.
Figure optionsDownload as PowerPoint slide
Journal: LWT - Food Science and Technology - Volume 72, October 2016, Pages 302–309