Valorization of asparagus-leaf by-product through nutritionally enriched chips to evaluate the effect of powder particle size on functional properties and rutin contents. Issue 1 (3rd January 2023)

• Record Type: Journal Article
• Authors: Chitrakar, Bimal; Zhang, Min; Zhang, Xiaohu; Bhandari, Bhesh
• Is Part Of: Drying technology. Volume 41:Issue 1(2023)
• Page Start: 34
• Page End: 45
• Publication Date: 2023-01-03
• Subjects: Asparagus-leaf by-product -- chips -- rutin -- TPC -- TFC; Drying -- Periodicals; Desiccation; 660.28426
• DOI: 10.1080/07373937.2022.2080703
• Languages: English
• ISSNs: 0737-3937

Abstract

Abstract: This study first observed that the nutritional and phytochemical contents in asparagus leafy by-product were comparable or higher than those in edible portion. The extractable rutin in leaf was found to increase with a decrease in powder particle size (400–120 μm), as indicated by ultra-performance liquid chromatographic analysis. Then, such leaf powders of different particle sizes were incorporated into freeze-dried chips formulation to evaluate the effect on chips properties. There was an apparent higher retention of total chlorophylls (161%), total phenolic (46%), and total flavonoid (79%) due to the decrease in particle size, ultimately showing an increase in the antioxidant activities. Also, the color ( L*, a*, and b* values) was significantly difference ( p < 0.05). LF-NMR study indicated the status of water and safer level of drying ( a w = 0.6). Conclusively, samples containing finer asparagus powder showed higher nutritional and phytochemical contents than those made with coarser powder.