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Zhang L, Ge H, Zhao J, Liu C, Wang Y. L-Theanine Improves the Gelation of Ginkgo Seed Proteins at Different pH Levels. Gels 2024; 10:131. [PMID: 38391461 PMCID: PMC10887952 DOI: 10.3390/gels10020131] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2023] [Revised: 01/26/2024] [Accepted: 02/03/2024] [Indexed: 02/24/2024] Open
Abstract
L-theanine (L-Th), a non-protein amino acid naturally found in teas and certain plant leaves, has garnered considerable attention due to its health benefits and potential to modify proteins such as ginkgo seed proteins, which have poor gelling properties, thereby expanding their applications in the food industry. The objective of this study was to investigate the impact of varying concentrations of L-Th (0.0%, 0.5%, 1.0%, and 2.0%) on the gelling properties of ginkgo seed protein isolate (GSPI) at various pH levels (5.0, 6.0, and 7.0). The GSPI gels exhibited the highest strength at a pH of 5.0 (132.1 ± 5.6 g), followed by a pH of 6.0 (95.9 ± 3.9 g), while a weak gel was formed at a pH of 7.0 (29.5 ± 0.2 g). The incorporation of L-Th increased the hardness (58.5-231.6%) and springiness (3.0-9.5%) of the GSPI gels at a pH of 7.0 in a concentration-dependent manner. However, L-Th did not enhance the gel strength or water holding capacity at a pH of 5.0. The rheological characteristics of the GSPI sols were found to be closely related to the textural properties of L-Th-incorporated gels. To understand the underlying mechanism of L-Th's effects, the physicochemical properties of the sols were analyzed. Specifically, L-Th promoted GSPI solubilization (up to 7.3%), reduced their hydrophobicity (up to 16.2%), reduced the particle size (up to 40.9%), and increased the ζ potential (up to 21%) of the sols. Overall, our findings suggest that L-Th holds promise as a functional ingredient for improving gel products.
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Affiliation(s)
- Luyan Zhang
- Department of Food Science and Engineering, College of Light Industry and Food Engineering, Nanjing Forestry University, Nanjing 210037, China
| | - Huifang Ge
- State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, 130 Changjiang West Road, Hefei 230036, China
| | - Jing Zhao
- School of Exercise and Nutritional Sciences, San Diego State University, San Diego, CA 92182, USA
| | - Changqi Liu
- School of Exercise and Nutritional Sciences, San Diego State University, San Diego, CA 92182, USA
| | - Yaosong Wang
- Department of Food Science and Engineering, College of Light Industry and Food Engineering, Nanjing Forestry University, Nanjing 210037, China
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Abdullah BA, Basyigit B, Karaaslan M. Drying Technique Providing Maximum Benefits on Hydrogelling Ability of Avocado Seed Protein: Spray Drying. Foods 2023; 12:4219. [PMID: 38231597 DOI: 10.3390/foods12234219] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2023] [Revised: 11/16/2023] [Accepted: 11/17/2023] [Indexed: 01/19/2024] Open
Abstract
The current study focused on creating natural hydrogels consisting of mixtures of avocado seed proteins dried with different techniques and locust bean gum. Proteins were extracted from avocado seed by alkali and isoelectric precipitation methods. Avocado seed proteins were dried by five different drying methods, namely ambient drying, oven drying, vacuum drying, freeze drying, and spray drying. FT-IR spectra were used to analyze the chemical structure of proteins dried using various techniques. Additionally, hydrogel models were constructed in the presence of avocado seed proteins and locust bean gum to clarify the effect of drying techniques on their hydrogelling ability. The impact of drying techniques on the functional behavior of hydrogels was notable. The maximum water holding capacity values were detected in the hydrogel system containing spray-dried proteins (93.79%), followed by freeze-dried (86.83%), vacuum-dried (76.17%), oven-dried (72.29%), and ambient-dried (64.8%) counterparts. The swelling ratio was 34.10, 33.51, 23.05, 18.93, and 14.39% for gels in the presence of freeze-dried, spray-dried, vacuum-dried, oven-dried, and ambient-dried proteins, respectively. Additionally, the desirable values for the amount of protein leaking from the systems prepared using spray-dried (7.99%) and freeze-dried (12.14%) proteins were obtained compared to others (ambient-dried: 24.03%; oven-dried: 17.69%; vacuum-dried: 19.10%). Superior results in terms of textural properties were achieved in hydrogel models containing spray-dried and freeze-dried proteins. In general, hydrogel models exhibited elastic behavior rather than viscous properties; however, the magnitudes of elasticity varied. Furthermore, the success of gels containing hydrogel models containing spray-dried protein and locust bean gum in the bioactive compound delivery system was obvious compared with protein ones alone.
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Affiliation(s)
- Bakhtiyar Azad Abdullah
- Department of Biology, Faculty of Science and Health, Koya University, Danielle Mitterrand Boulevard, Koya KOY45, Kurdistan Region-F.R., Iraq
- Food Engineering Department, Engineering Faculty, Harran University, Sanliurfa 63000, Turkey
| | - Bulent Basyigit
- Food Engineering Department, Engineering Faculty, Harran University, Sanliurfa 63000, Turkey
| | - Mehmet Karaaslan
- Food Engineering Department, Engineering Faculty, Harran University, Sanliurfa 63000, Turkey
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Cháirez-Jiménez C, Castro-López C, Serna-Saldívar S, Chuck-Hernández C. Partial characterization of canola ( Brassica napus L.) protein isolates as affected by extraction and purification methods. Heliyon 2023; 9:e21938. [PMID: 38027992 PMCID: PMC10654237 DOI: 10.1016/j.heliyon.2023.e21938] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2023] [Revised: 10/31/2023] [Accepted: 10/31/2023] [Indexed: 12/01/2023] Open
Abstract
Canola (Brassica napus L.) meal represents a prominent alternative plant-based source for protein isolation. This work aimed to investigate the combined effect of extraction and purification methods for the production of canola protein isolates (CPIs). CPIs were characterized in terms of process yield, protein recovery, basic composition, amino acid profile, in vitro protein digestibility, techno-functional properties, structural properties, and molecular features. The results showed that the Alk-Uf method enhanced yield (16.23 %) and protein recovery (34.88 %). Meanwhile, the Et-Alk-Uf method exhibited the highest crude protein (89.71 %) and free amino nitrogen (4.34 mg g protein-1) contents. Furthermore, protein digestibility (95.5 %) and protein digestibility corrected amino acid score (1.0) were improved using the Et-Alk-Ac method. Conversely, the amino acid composition, secondary structure, and electrophoretic profiles were generally similar for all CPIs. The Alk-Uf and Et-Alk-Uf methods produced isolates with the highest water solubility (∼39.18 %), water absorption capacity (∼3.86 g water g protein-1), oil absorption capacity (∼2.77 g oil g protein-1), and foaming capacity (∼505.26 %). Finally, the foaming stability (93.75 %) and foaming density (34.38 %) were increased when employing the Alk-Ac method. These findings suggest that, in general, the Alk-Uf and Et-Alk-Uf methods can be used to obtain CPIs with high added value for use in food formulations.
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Affiliation(s)
- Cristina Cháirez-Jiménez
- Tecnologico de Monterrey, Escuela de Ingeniería y Ciencias, Eugenio Garza Sada 2501, Monterrey, Nuevo León, 64849, Mexico
- Tecnologico de Monterrey, Instituto para la Investigación en Obesidad, Eugenio Garza Sada 2501, Monterrey, Nuevo León, 64849, Mexico
| | - Cecilia Castro-López
- Laboratorio de Química y Biotecnología de Productos Lácteos. Centro de Investigación en Alimentación y Desarrollo A.C. (CIAD A.C.), Carretera Gustavo Enrique Astiazarán Rosas 46, Hermosillo, Sonora, 83304, Mexico
| | - Sergio Serna-Saldívar
- Tecnologico de Monterrey, Escuela de Ingeniería y Ciencias, Eugenio Garza Sada 2501, Monterrey, Nuevo León, 64849, Mexico
| | - Cristina Chuck-Hernández
- Tecnologico de Monterrey, Instituto para la Investigación en Obesidad, Eugenio Garza Sada 2501, Monterrey, Nuevo León, 64849, Mexico
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Cingöz A, Yildirim M. Effects of hydrolysis degree on the functional properties of hydrolysates from sour cherry kernel protein concentrate. FOODS AND RAW MATERIALS 2023. [DOI: 10.21603/2308-4057-2023-2-566] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/07/2023] Open
Abstract
During the processing of sour cherries into different foodstuffs, a large amount of kernels is produced as waste material, which creates a significant disposal problem for the food industry. Sour cherry kernels containing 25.3–35.5% of protein can be used as a functional protein source in food production. Therefore, we aimed to study the effects of hydrolysis degree on the sour cherry kernel protein hydrolysates.
Proteins were extracted from the defatted flour by isoelectric precipitation. The resulting protein concentrate was hydrolyzed (5, 10, and 15% hydrolysis) using Alcalase to yield hydrolysates. We determined their oil and water holding, emulsifying, gelation, and foaming properties, as well as apparent molecular weight distribution and proximate compositions.
No protein fractions greater than an apparent molecular weight of about 22 kDa were present in the hydrolysates. The hydrolysis of the protein concentrate mostly led to an increase in protein solubility. As the degree of hydrolysis increased from 5 to 15%, the water holding capacity of the hydrolysates decreased from 2.50 ± 0.03 to 2.03 ± 0.02 g water/g, indicating its deterioration.
The hydrolysates obtained at different degrees of hydrolysis had a better solubility than the intact protein concentrate. The oil holding capacity, the foaming stability, and the least gelation concentration of the protein concentrate could not be considerably improved by hydrolysis. In contrast, its emulsifying activity index and foaming capacity could be increased with a limited degree of hydrolysis (up to 10%).
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Phospholipids molecular species, proteins secondary structure, and emulsion microstructure of egg yolk with reduced polar and/or nonpolar lipids. Int J Biol Macromol 2023; 233:123529. [PMID: 36740113 DOI: 10.1016/j.ijbiomac.2023.123529] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2022] [Revised: 01/28/2023] [Accepted: 01/30/2023] [Indexed: 02/05/2023]
Abstract
This study investigated the phospholipids (PLs) molecular species (PLs-MS), protein secondary structure (PSS), and emulsion microstructure of the egg yolk (EY) treated with supercritical-CO2 (T1), hexane (T2), and ethanol {at room temperature (T3) and 65 °C (T4)}. PLs-MS, PSS, and microstructure of EY emulsion were investigated with UPLC-Q-TOF-MS, Fourier-transforms infrared and Raman spectroscopy, and confocal laser scanning microscope, respectively. Predominant PLs molecular fractions were C18:0-C20:4, C18:0-C20:4, C16:0-C18:2, C16:0, C18:0-C18:2, and d18:1/16:0, for phosphatidylcholine, phosphatidylethanolamine, phosphatidylinositol, lysophosphatidylcholine, sphingomyelin, and phosphatidylserine, respectively. All the PLs-MS were highest for T1 and many of them (C14:0-C16:0, C18:0-C18:1, C18:0-C20:3) were absent in T2, T3, and T4. PSS components (α-helices, β-sheets, β-turn, and random coil) were highest for T4, followed by T3, T2, T1, and control (non-treated EY). However, T1-added o/w emulsion showed excellent stability (95.64 %) with smaller and denser oil droplets due to better ionic interactions by synergistic effect of PLs-MS and PSS components.
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Liu FF, Li YQ, Wang CY, Zhao XZ, Liang Y, He JX, Mo HZ. Impact of pH on the physicochemical and rheological properties of mung bean (Vigna radiata L.) protein. Process Biochem 2021. [DOI: 10.1016/j.procbio.2021.10.008] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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He Z, Liu C, Zhao J, Li W, Wang Y. Physicochemical properties of a ginkgo seed protein-pectin composite gel. Food Hydrocoll 2021. [DOI: 10.1016/j.foodhyd.2021.106781] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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Evaluation of chicken nugget properties using spent hen meat added with milk fat and potato mash at different levels. JOURNAL OF FOOD SCIENCE AND TECHNOLOGY 2021; 58:2783-2791. [PMID: 34194112 DOI: 10.1007/s13197-020-04787-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Revised: 07/28/2020] [Accepted: 09/09/2020] [Indexed: 02/07/2023]
Abstract
This study was aimed to develop chicken nuggets using spent hen meat (SHM) added with milk fat (MF) and potato mash (PM) at different levels. Four different spent hen nuggets (SHNs) i.e. T1 (75% SHM with 5% MF), T2 (70% SHM with 8% MF and 2% PM), T3 (65% SHM with 11% MF and 4% PM), and T4 (60% SHM with 14% MF and 6% PM) were formulated and compared with the control, using broiler chicken meat without MF and PM. The control, T1, and T2 were not significantly different with respect to protein and fat contents. The emulsion stability (92.2%), frying yield (84.1%), hardness (19.2 N) and chewiness (11.4 N) of T2 were similar to the control. The incorporation of MF and PM resulted in increased taste and flavor scores for SHN. The overall acceptability score was same for the control and T2. The conjugated dienes and thiobarbituric acid-reactive substance results showed that the addition of MF at 8 to 10% did not have an effect on the oxidative stability of SHN during storage. MF-incorporated SHN may be a regular chicken nugget for all consumers due to improved texture and sensory quality with similar fat content to the control.
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Kim AN, Rahman MS, Lee KY, Choi SG. Superheated steam pretreatment of rice flours: Gelatinization behavior and functional properties during thermal treatment. FOOD BIOSCI 2021. [DOI: 10.1016/j.fbio.2021.101013] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Effects of pretreatments on physicochemical and structural properties of proteins isolated from canola seeds after oil extraction by supercritical-CO2 process. Lebensm Wiss Technol 2021. [DOI: 10.1016/j.lwt.2020.110415] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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Yang HJ, Wang HF, Tao F, Li WX, Cao GT, Yang YY, Xu XL, Zhou GH, Shen Q. Structural basis for high-pressure improvement in depolymerization of interfacial protein from RFRS meat batters in relation to their solubility. Food Res Int 2021; 139:109834. [PMID: 33509459 DOI: 10.1016/j.foodres.2020.109834] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2020] [Revised: 10/13/2020] [Accepted: 10/18/2020] [Indexed: 11/30/2022]
Abstract
High-pressure processing (HPP) can modify the construction of interfacial proteins (IPs) to improve the properties of reduced-fat and reduced-salt (RFRS) meat batters. In this study, the relationship between the construction of IPs and their solubility at fat droplet/water interface in RFRS meat batters with HPP treatments was investigated. When 200 MPa for 2 min was applied, the IPs exhibited the highest solubility due to a high concentration of absorbed myosin with the content of random coil 65.62%, but the particle diameter was in reverse. The microscopy revealed the depolymerization of IPs occurred at low pressure, while macromolecular aggregates were produced as the cross-linking of IPs to some degree at pressure ≥ 200 MPa. This phenomenon was supported by the result of SDS-PAGE and the sulfhydryl of IPs. In conclusion, the HPP induced solubility alteration of IPs was achieved by modifying their construction through adjusting the secondary structures and regulating bond interactions.
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Affiliation(s)
- Hui-Juan Yang
- College of Standardization, China Jiliang University, Hangzhou 310018, PR China; Synergetic Innovative Center of Food Safety and Nutrition, Key Laboratory of Meat Processing and Quality Control, Ministry of Education, College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, PR China
| | - Hai-Feng Wang
- Collaborative Innovation Center of Seafood Deep Processing, Zhejiang Province Joint Key Laboratory of Aquatic Products Processing, Institute of Seafood, Zhejiang Gongshang University, Hangzhou, PR China
| | - Fei Tao
- College of Standardization, China Jiliang University, Hangzhou 310018, PR China
| | - Wei-Xia Li
- College of Standardization, China Jiliang University, Hangzhou 310018, PR China
| | - Guang-Tian Cao
- College of Standardization, China Jiliang University, Hangzhou 310018, PR China
| | - Yun-Yun Yang
- College of Standardization, China Jiliang University, Hangzhou 310018, PR China
| | - Xing-Lian Xu
- Synergetic Innovative Center of Food Safety and Nutrition, Key Laboratory of Meat Processing and Quality Control, Ministry of Education, College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, PR China
| | - Guang-Hong Zhou
- Synergetic Innovative Center of Food Safety and Nutrition, Key Laboratory of Meat Processing and Quality Control, Ministry of Education, College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, PR China
| | - Qing Shen
- Collaborative Innovation Center of Seafood Deep Processing, Zhejiang Province Joint Key Laboratory of Aquatic Products Processing, Institute of Seafood, Zhejiang Gongshang University, Hangzhou, PR China.
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Lee KY, Rahman MS, Kim AN, Jeong EJ, Kim BG, Lee MH, Kim HJ, Choi SG. Effect of superheated steam treatment on yield, physicochemical properties and volatile profiles of perilla seed oil. Lebensm Wiss Technol 2021. [DOI: 10.1016/j.lwt.2020.110240] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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