Nano selenium-alginate edible coating extends hydroponic strawberry shelf life and provides selenium fortification as a micro-nutrient  

作　　者：Thu Hong Tran Xuan Cuong Le Thi Ngoc Mai Tran Ngoc Thuy Trang Nguyen Bao Ngoc Pham Duong Vu 

机构地区：[1]Center of Radiation Technology and Biotechnology,Nuclear Research Institute,01 Nguyen Tu Luc,Ward 8,Dalat City,Viet Nam [2]Institute of Physics,Vietnam Academy of Science and Technology,18 Hoang Quoc Viet,Hanoi,Viet Nam

出　　处：《Food Bioscience》2023年第3期1000-1012,共13页食品生物科学（英文）

摘　　要：Although selenium nanoparticles(Nano Se)have gained attention for their anti-cancer and antioxidant activity,this nanomaterial’s antimicrobial activity also has great potential.The aim of this study was to synthesize Nano Se edible coating solution through gamma irradiation technique with a bio-stabilizer of sodium alginate(Na-alg.),which is an ingredient commonly used in food preservation.Dynamic light scattering and transmission electron microscopy identified 94-nm-diameter Nano Se,and energy dispersive X-ray spectroscopy and Raman spectroscopy confirmed the formation of Nano Se.Antifungal studies revealed that Na-alg./Nano Se coating solution well inhibited both Neopestalotiopsis rosae and Fusarium oxysporum in single species culture conditions.The effectiveness of edible coatings containing Nano Se and Na-alg.on the physicochemical properties of strawberries at 24±2℃ during 5-day storage period was evaluated.The results showed coated strawberries enhanced firmness by as much as 26%and a significantly less weight loss by as much as three fold compared to the control.The coating application was effective in maintaining a natural appearance and preserving half the amounts of vitamin C and B9 in the strawberries.In addition,the Na-alg./Nano Se coating was utilized as an additive to increase Se nutrient in strawberries.The Se content was supplemented from 0.28 to 0.56μg per 100 g FW after coating.This study may potentially be used in the bio-preservation and Se-enrichment of various fresh fruits and other foods.

关 键 词：Nano-coating Irradiation Antifungal activity Food preservation Dietary supplementation 

分 类 号：TS201[轻工技术与工程—食品科学]