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Zheng H, Sun Y, Zheng T, Zeng Y, Fu L, Zhou T, Jia F, Xu Y, He K, Yang Y. Effects of shear emulsifying/ball milling/autoclave modification on structure, physicochemical properties, phenolic compounds, and antioxidant capacity of lotus ( Nelumbo) leaves dietary fiber. Front Nutr 2023; 10:1064662. [PMID: 36908912 PMCID: PMC9995909 DOI: 10.3389/fnut.2023.1064662] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2022] [Accepted: 02/06/2023] [Indexed: 02/25/2023] Open
Abstract
Lotus (Nelumbo) leaves are rich in polyphenols and dietary fiber, which have the potential as a high-quality fiber material in functional food. However, lotus leaves exhibit dense structure and poor taste, it is vital to develop appropriate modification methods to improve the properties of lotus leaves dietary fiber. In this study, the effects of three modification methods with shear emulsifying (SE), ball milling (BM), and autoclave treatment (AT) on structure, physicochemical properties, phenolic compounds, and antioxidant capacity of lotus leave dietary fiber (LDF) were evaluated. SEM indicated that there were significant differences in the microstructure of modified LDFs. FT-IR spectra and X-ray diffraction pattern of modified LDFs revealed similar shapes, while the peak intensity and crystalline region changed by modification. SE showed the greatest effect on crystallization index. SE-LDF had the highest water holding capacity, water swelling capacity, and bound phenolic content in LDFs, which increased by 15.69, 12.02, and 31.81%, respectively, compared with the unmodified LDF. BM exhibited the most dramatic effect on particle size. BM-LDF had the highest free phenolic and total phenolic contents in LDFs, which increased by 32.20 and 29.05% respectively, compared with the unmodified LDF. Phenolic compounds in LDFs were mainly free phenolic, and modifications altered the concents of flavonoids. The BM-LDF and SE-LDF exhibited higher antioxidant capacity than that of AT-LDF. Overall, SE-LDF showed better physical properties, and BM-LDF showed better bioactive components. SE and BM were considered to be appropriate modification methods to enhance the properties of LDF with their own advantages.
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Affiliation(s)
- Hui Zheng
- College of Pharmacy, Hunan University of Chinese Medicine, Changsha, China
| | - Yan Sun
- College of Pharmacy, Hunan University of Chinese Medicine, Changsha, China
| | - Tao Zheng
- College of Pharmacy, Hunan University of Chinese Medicine, Changsha, China
| | - Yiqiong Zeng
- College of Pharmacy, Hunan University of Chinese Medicine, Changsha, China
| | - Liping Fu
- College of Pharmacy, Hunan University of Chinese Medicine, Changsha, China
| | - Tingting Zhou
- College of Pharmacy, Hunan University of Chinese Medicine, Changsha, China
| | - Fan Jia
- College of Pharmacy, Hunan University of Chinese Medicine, Changsha, China
| | - Yao Xu
- College of Pharmacy, Hunan University of Chinese Medicine, Changsha, China
| | - Kai He
- School of Pharmaceutical Science, Hunan University of Medicine, Huaihua, China
| | - Yong Yang
- College of Pharmacy, Hunan University of Chinese Medicine, Changsha, China
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Sari TP, Sirohi R, Krishania M, Bhoj S, Samtiya M, Duggal M, Kumar D, Badgujar PC. Critical overview of biorefinery approaches for valorization of protein rich tree nut oil industry by-product. BIORESOURCE TECHNOLOGY 2022; 362:127775. [PMID: 35964919 DOI: 10.1016/j.biortech.2022.127775] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2022] [Revised: 08/06/2022] [Accepted: 08/08/2022] [Indexed: 06/15/2023]
Abstract
This review explores reutilization opportunities of protein-rich bio-waste derived from the major tree nuts (almonds, walnuts, and cashew nuts) oil processing industries through biorefinery strategies. The mechanically pressed out oil cakes of these nuts have high protein (45-55%), carbohydrate (30-35%), and fiber that could be utilized to produce bioactive peptides, biofuels, and dietary fiber, respectively; all of which can fetch substantially greater value than its current utilization as a cattle feed. Specific attention has been given to the production, characterization, and application of nut-based de-oiled cake hydrolysates for therapeutic benefits including antioxidant, antihypertensive and neuroprotective properties. The often-neglected safety/toxicological evaluation of the hydrolysates/peptide sequences has also been described. Based on the available data, it is concluded that enzymatic hydrolysis is a preferred method than microbial fermentation for the value addition of de-oiled tree nut cakes. Further, critical insights on the existing literature as well as potential research ideas have also been proposed.
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Affiliation(s)
- T P Sari
- Department of Food Science and Technology, National Institute of Food Technology Entrepreneurship and Management, Kundli, Sonipat 131 028, Haryana, India
| | - Ranjna Sirohi
- Department of Food Technology, School of Health Sciences and Technology, University of Petroleum and Energy Studies, Dehradun 248 007, Uttarakhand, India
| | - Meena Krishania
- Center of Innovative and Applied Bioprocessing (CIAB), Sector-81, Mohali 140 306, India
| | - Suvarna Bhoj
- Livestock Production and Management Section, ICAR-Indian Veterinary Research Institute, Izatnagar, Bareilly 243 122, Uttar Pradesh, India
| | - Mrinal Samtiya
- Department of Food Science and Technology, National Institute of Food Technology Entrepreneurship and Management, Kundli, Sonipat 131 028, Haryana, India
| | - Muskaan Duggal
- Center of Innovative and Applied Bioprocessing (CIAB), Sector-81, Mohali 140 306, India
| | - Deepak Kumar
- Department of Food Science and Technology, National Institute of Food Technology Entrepreneurship and Management, Kundli, Sonipat 131 028, Haryana, India; Division of Food Science and Technology, Department of Nutrition and Dietetics, Manav Rachna International Institute of Research and Studies, Faridabad 121 004, Haryana, India
| | - Prarabdh C Badgujar
- Department of Food Science and Technology, National Institute of Food Technology Entrepreneurship and Management, Kundli, Sonipat 131 028, Haryana, India.
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