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Shi W, Zhang T, Xie H, Xing B, Wen P, Ouyang K, Xiao F, Guo Q, Xiong H, Zhao Q. Characterization and in vitro digestibility of soybean tofu: Influence of the different kinds of coagulant. Food Chem 2024; 450:138984. [PMID: 38642532 DOI: 10.1016/j.foodchem.2024.138984] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2023] [Revised: 02/18/2024] [Accepted: 03/07/2024] [Indexed: 04/22/2024]
Abstract
This study explored the effect of diverse coagulants (glucono-δ-lactone (GDL), gypsum (GYP), microbial transglutaminase (MTGase), and white vinegar (WVG)) on microstructure, quality, and digestion properties of tofu. The four kinds of tofu were significantly different in their structure, composition, and digestibility. Tofu coagulated with MTGase had the highest springiness and cohesiveness while GDL tofu had the highest enthalpy (6.54 J/g). However, the WVG and GYP groups outperformed others in terms of thermodynamic, and digestion properties. The WVG group exhibited the highest nitrogen release (84.3%), water content, denaturation temperature, and the highest free-SH content but the lowest S-S content. Compared to WVG, the GYP group had the highest ash content, hardness, and chewiness. Results demonstrated that the tofu prepared by WVG and GYP show high digestibility. Meanwhile, the former has better thermal properties and the latter has better texture properties.
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Affiliation(s)
- Wenyi Shi
- State Key Laboratory of Food Science and Resources, Nanchang University, Jiangxi 330047, China
| | - Tingting Zhang
- State Key Laboratory of Food Science and Resources, Nanchang University, Jiangxi 330047, China
| | - Hexiang Xie
- State Key Laboratory of Food Science and Resources, Nanchang University, Jiangxi 330047, China
| | - Beibei Xing
- State Key Laboratory of Food Science and Resources, Nanchang University, Jiangxi 330047, China; Xi'an Institute of Integrated Medical Information, Shaanxi 710000, China
| | - Pingwei Wen
- State Key Laboratory of Food Science and Resources, Nanchang University, Jiangxi 330047, China
| | - Kefan Ouyang
- State Key Laboratory of Food Science and Resources, Nanchang University, Jiangxi 330047, China
| | - Fangjie Xiao
- State Key Laboratory of Food Science and Resources, Nanchang University, Jiangxi 330047, China
| | - Qing Guo
- State Key Laboratory of Food Science and Resources, Nanchang University, Jiangxi 330047, China
| | - Hua Xiong
- State Key Laboratory of Food Science and Resources, Nanchang University, Jiangxi 330047, China
| | - Qiang Zhao
- State Key Laboratory of Food Science and Resources, Nanchang University, Jiangxi 330047, China.
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Xia X, Yang X, Zhu Y, Sun Y, Zhu X. Effect and mechanism of freezing on the quality and structure of soymilk gel induced by different salt ions. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2024; 104:5284-5295. [PMID: 38308594 DOI: 10.1002/jsfa.13354] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/30/2023] [Revised: 12/23/2023] [Accepted: 02/01/2024] [Indexed: 02/05/2024]
Abstract
BACKGROUND The increasing attention toward frozen soy-based foods has sparked interest. Variations exist in the quality and structure of soymilk gels induced by different salt ions, leading to diverse changes post-freezing. This study compared and analyzed the effects of calcium chloride (CC), magnesium chloride (MC) and calcium sulfate (CS) on the quality characteristics and protein structure changes of soymilk gels (CC-S, MC-S and CS-S) before and after freezing, and clarified the mechanisms of freezing on soymilk gel. RESULTS The formation rate of soymilk gel is influenced by the type of salt ions. In comparison to CS and MC, soymilk gel induced by CC exhibited the fastest formation rate, highest gel hardness, lowest moisture content, and smaller gel pores. However, freezing treatment deteriorated the quality of soymilk gel induced by different salt ions, leading to a decline in textural properties (hardness and chewiness). Among these, the textual state of CC-induced soymilk gel remained optimal, exhibiting the least apparent damage and minimal cooking loss. Freezing treatments prompt a transition of soymilk gel secondary structure from β-turns to β-sheets, disrupting the protein's tertiary structure. Furthermore, freezing treatments also fostered the crosslinking between soymilk gel protein, increasing the content of disulfide bonds. CONCLUSION The quality of frozen soymilk gel is influenced by the rate of gel formation induced by salt ions. After freezing, soymilk gel with faster gelation rates exhibited a greater tendency for the transformation of protein-water interactions into protein-protein interactions. They showed a higher degree of disulfide bond formation, resulting in a more tightly knit and firm frozen gel network structure with denser and more uniformly distributed pores. © 2024 Society of Chemical Industry.
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Affiliation(s)
- Xiaoyu Xia
- College of Food Engineering, Harbin University of Commerce, Harbin, China
- Soybean Research Institute of Heilongjiang Academy of Agricultural Sciences, Harbin, China
| | - Xinxin Yang
- College of Food Engineering, Harbin University of Commerce, Harbin, China
| | - Ying Zhu
- College of Food Engineering, Harbin University of Commerce, Harbin, China
| | - Ying Sun
- College of Food Engineering, Harbin University of Commerce, Harbin, China
| | - Xiuqing Zhu
- College of Food Engineering, Harbin University of Commerce, Harbin, China
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Shen J, Chen Y, Li X, Zhou X, Ding Y. Enhanced probiotic viability in innovative double-network emulsion gels: Synergistic effects of the whey protein concentrate-xanthan gum complex and κ-carrageenan. Int J Biol Macromol 2024; 270:131758. [PMID: 38714282 DOI: 10.1016/j.ijbiomac.2024.131758] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2024] [Revised: 04/12/2024] [Accepted: 04/20/2024] [Indexed: 05/09/2024]
Abstract
In this study, the whey protein concentrate and xanthan gum complex obtained by specific pH treatment, along with κ-carrageenan (KC), were used to encapsulate Lactobacillus acidophilus JYLA-191 in an emulsion gel system. The effects of crosslinking and KC concentration on the visual characteristics, stability, mechanical properties, and formation mechanism of emulsion gels were investigated. The results of optical imaging, particle size distribution, and rheology exhibited that with the addition of crosslinking agents, denser and more homogeneous emulsion gels were formed, along with a relative decrease in the droplet size and a gradual increase in viscosity. Especially when the concentration of citric acid (CA) was 0.09 wt%, KC was 0.8 wt%, and K+ was present in the system, the double-network emulsion gel was stable at high temperatures and in freezing environments, and the swelling ratio was the lowest (9.41%). Gastrointestinal tract digestive treatments and pasteurization revealed that the probiotics encapsulated in the double-network emulsion gel had a higher survival rate, which was attributed to the synergistic cross-linking of CA and K+ biopolymers to construct the emulsion gels. Overall, this study highlights the potential of emulsion gels to maintain probiotic vitality and provides valuable insights for developing inventive functional foods.
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Affiliation(s)
- Jie Shen
- College of Food Science and Technology, Zhejiang University of Technology, Hangzhou 310014, Zhejiang, China; Key Laboratory of Marine Fishery Resources Exploitment & Utilization of Zhejiang Province, Hangzhou 310014, Zhejiang, China; National R&D Branch Center for Pelagic Aquatic Products Processing (Hangzhou), Hangzhou 310014, Zhejiang, China
| | - Yufeng Chen
- College of Food Science and Technology, Zhejiang University of Technology, Hangzhou 310014, Zhejiang, China; Key Laboratory of Marine Fishery Resources Exploitment & Utilization of Zhejiang Province, Hangzhou 310014, Zhejiang, China; National R&D Branch Center for Pelagic Aquatic Products Processing (Hangzhou), Hangzhou 310014, Zhejiang, China
| | - Xuepeng Li
- College of Food Science and Technology, Bohai University, Jinzhou 121013, Liaoning, China
| | - Xuxia Zhou
- College of Food Science and Technology, Zhejiang University of Technology, Hangzhou 310014, Zhejiang, China; Key Laboratory of Marine Fishery Resources Exploitment & Utilization of Zhejiang Province, Hangzhou 310014, Zhejiang, China; National R&D Branch Center for Pelagic Aquatic Products Processing (Hangzhou), Hangzhou 310014, Zhejiang, China; Collaborative Innovation Center of Seafood Deep Processing, Dalian Polytechnic University, Dalian 116034, Liaoning, China.
| | - Yuting Ding
- College of Food Science and Technology, Zhejiang University of Technology, Hangzhou 310014, Zhejiang, China; Key Laboratory of Marine Fishery Resources Exploitment & Utilization of Zhejiang Province, Hangzhou 310014, Zhejiang, China; National R&D Branch Center for Pelagic Aquatic Products Processing (Hangzhou), Hangzhou 310014, Zhejiang, China; Collaborative Innovation Center of Seafood Deep Processing, Dalian Polytechnic University, Dalian 116034, Liaoning, China.
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Qiao M, Zhang T, Miao M. Minced Beef Meat Paste Characteristics: Gel Properties, Water Distribution, and Microstructures Regulated by Medium Molecular Mass of γ-Poly-Glutamic Acid. Foods 2024; 13:510. [PMID: 38397487 PMCID: PMC10887638 DOI: 10.3390/foods13040510] [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: 01/09/2024] [Revised: 02/01/2024] [Accepted: 02/04/2024] [Indexed: 02/25/2024] Open
Abstract
The influences of various m-γ-PGA (0.08-0.20%, w/w) concentrations on the properties of minced beef meat paste in terms of rheological properties, texture, moisture distribution, and microstructures were evaluated. The results indicated that m-γ-PGA enhanced the water-holding capacity, gel strength, texture, and whiteness of the minced beef meat paste. Based on the microstructural results, m-γ-PGA helped form a more organized and compact gel, thereby limiting the migration of water through the gel matrix. In contrast to the control group, the water-holding property, gel strength, and whiteness of minced meat paste gels with m-γ-PGA content of 0.12% increased from 75.89%, 584.51 g·cm, and 61.83 to 79.91%, 780.87 g·cm, and 62.54, respectively (p < 0.05), exhibiting the highest water-holding property and gel strength. Thus, m-γ-PGA exhibits great potential for minced meat paste products as a healthy gel water retainer and enhancer in low-fat meat products.
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Affiliation(s)
- Mengmeng Qiao
- State Key Laboratory of Food Science and Resources, Jiangnan University, Wuxi 214122, China; (M.Q.); (M.M.)
- School of Food Science and Technology, Jiangnan University, Wuxi 214122, China
| | - Tao Zhang
- State Key Laboratory of Food Science and Resources, Jiangnan University, Wuxi 214122, China; (M.Q.); (M.M.)
- School of Food Science and Technology, Jiangnan University, Wuxi 214122, China
| | - Ming Miao
- State Key Laboratory of Food Science and Resources, Jiangnan University, Wuxi 214122, China; (M.Q.); (M.M.)
- School of Food Science and Technology, Jiangnan University, Wuxi 214122, China
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5
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Dang Y, Ren J, Guo Y, Yang Q, Liang J, Li R, Zhang R, Yang P, Gao X, Du SK. Structural, functional properties of protein and characteristics of tofu from small-seeded soybeans grown in the Loess Plateau of China. Food Chem X 2023; 18:100689. [PMID: 37151211 PMCID: PMC10154771 DOI: 10.1016/j.fochx.2023.100689] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2023] [Revised: 04/14/2023] [Accepted: 04/20/2023] [Indexed: 05/09/2023] Open
Abstract
The structural, functional properties of protein isolated from small-seeded soybeans were investigated and characteristics of tofu were studied. Small-seeded soybean protein had obvious α', α, β, acidic and basic subunits bands and two endothermic peaks (76.02-76.63℃ and 91.94-94.25℃). Small-seeded black soybean protein isolates (SBSPI) had more β-sheet (31.90-33.54%) structure, while small-seeded yellow soybean protein isolates (SYSPI) had more α-helix (18.89-20.72%) structure. SYSPI had higher fluorescence intensity (839.10-847.80) than SBSPI (482.70-565.10). SBSPI exhibited higher surface hydrophobicity (939.51-1252.75) and water absorption capacity (8.07-8.50 g/g). Tofu made from small-seeded yellow soybeans had higher yield (549.46-560.23 g/100 g soybean) and was brighter (L*, 74.61-77.48) and more yellowish (b*, 14.83-14.95) in color. Tofu made from Fugu small-seeded black soybean (FGSBS) had the highest hardness (178.52 g), adhesiveness (-25.77 g.sec), chewiness (87.45 g) and resilience (0.26), signifying a more compact structure.
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Affiliation(s)
- Yueyi Dang
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Jing Ren
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Ying Guo
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Qinghua Yang
- College of Agronomy, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Jibao Liang
- Shenmu Agricultural Technology Promotion Center, Shenmu, Shaanxi 719300, China
| | - Rui Li
- Shenmu Agricultural Technology Promotion Center, Shenmu, Shaanxi 719300, China
| | - Rui Zhang
- Shenmu Agricultural Technology Promotion Center, Shenmu, Shaanxi 719300, China
| | - Pu Yang
- College of Agronomy, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Xiaoli Gao
- College of Agronomy, Northwest A&F University, Yangling, Shaanxi 712100, China
- Engineering Research Center of Grain and Oil Functionalized Processing in Universities of Shaanxi Province, Yangling, Shaanxi 712100, China
- Corresponding authors at: College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi 712100, China.
| | - Shuang-kui Du
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi 712100, China
- Engineering Research Center of Grain and Oil Functionalized Processing in Universities of Shaanxi Province, Yangling, Shaanxi 712100, China
- Corresponding authors at: College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi 712100, China.
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Influence of Chitosan and Glucono-δ-Lactone on the Gel Properties, Microstructural and Textural Modification of Pea-Based Tofu-Type Product. Processes (Basel) 2022. [DOI: 10.3390/pr10081639] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
Abstract
This study investigated the effects of the addition of chitosan (0–1.0%) or glucono-δ-lactone (GDL) (0–60 mM) on the gel properties, microstructure, and texture of pea-based tofu-type product. Following the addition of 0.5% chitosan or 20 mM GDL, we observed a significant decrease in the hardness and cohesiveness of the tofu, resulting in a slightly discontinuous network structure with pores smaller than those in samples without chitosan or GDL. SDS-PAGE analysis revealed the induced aggregation of pea legumin (11S) and vicilin (7S) subunits (30, 34, and 50 kDa), legumin α subunit (40 kDa), and legumin β subunit (20 kDa) by chitosan or GDL. It appears that chitosan and GDL could potentially be used as food additives for the development of texture-modified pea-based tofu-type products.
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7
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Wang T, Chen X, Wang N, Wu N, Jiang L, Wu F, Yu D, Cheng J, Wang L. Effect of electrochemical treatment on the formation and characteristics of induced soybean milk gel. J FOOD ENG 2022. [DOI: 10.1016/j.jfoodeng.2022.111007] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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8
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Ibrahim SG, Wan Ibadullah WZ, Saari N, Karim R. Quality improvement of kenaf‐based tofu: effects of kenaf seed substitution, and coagulant types and concentrations on the physicochemical quality, texture profile and microstructure of the tofu. Int J Food Sci Technol 2022. [DOI: 10.1111/ijfs.15725] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Shafa’atu Giwa Ibrahim
- Department of Food Technology Faculty of Food Science and Technology Universiti Putra Malaysia Serdang 43400 Selangor Malaysia
- Department of Biochemistry and Molecular Biology Faculty of Science Usmanu Danfodiyo University Sokoto Nigeria
| | - Wan Zunairah Wan Ibadullah
- Department of Food Science Faculty of Food Science and Technology Universiti Putra Malaysia Serdang 43400 Selangor Malaysia
| | - Nazamid Saari
- Department of Food Science Faculty of Food Science and Technology Universiti Putra Malaysia Serdang 43400 Selangor Malaysia
| | - Roselina Karim
- Department of Food Technology Faculty of Food Science and Technology Universiti Putra Malaysia Serdang 43400 Selangor Malaysia
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9
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Li D, Hou L, Gao Y, Tian Z, Fan B, Wang F, Li S. Recent Advances in Microbial Synthesis of Poly-γ-Glutamic Acid: A Review. Foods 2022; 11:foods11050739. [PMID: 35267372 PMCID: PMC8909396 DOI: 10.3390/foods11050739] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2022] [Revised: 02/12/2022] [Accepted: 02/26/2022] [Indexed: 02/01/2023] Open
Abstract
Poly-γ-glutamic acid (γ-PGA) is a natural, safe, non-immunogenic, biodegradable, and environmentally friendly glutamic biopolymer. γ-PGA has been regarded as a promising bio-based materials in the food field, medical field, even in environmental engineering field, and other industrial fields. Microbial synthesis is an economical and effective way to synthesize γ-PGA. Bacillus species are the most widely studied producing strains. γ-PGA biosynthesis involves metabolic pathway of racemization, polymerization, transfer, and catabolism. Although microbial synthesis of γ-PGA has already been used extensively, productivity and yield remain the major constraints for its industrial application. Metabolic regulation is an attempt to solve the above bottleneck problems and meet the demands of commercialization. Therefore, it is important to understand critical factors that influence γ-PGA microbial synthesis in depth. This review focuses on production strains, biosynthetic pathway, and metabolic regulation. Moreover, it systematically summarizes the functional properties, purification procedure, and industrial application of γ-PGA.
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Affiliation(s)
- Danfeng Li
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, No. 2 Yuan Ming Yuan West Road, Beijing 100193, China; (D.L.); (L.H.); (Y.G.); (Z.T.); (B.F.)
| | - Lizhen Hou
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, No. 2 Yuan Ming Yuan West Road, Beijing 100193, China; (D.L.); (L.H.); (Y.G.); (Z.T.); (B.F.)
| | - Yaxin Gao
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, No. 2 Yuan Ming Yuan West Road, Beijing 100193, China; (D.L.); (L.H.); (Y.G.); (Z.T.); (B.F.)
| | - Zhiliang Tian
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, No. 2 Yuan Ming Yuan West Road, Beijing 100193, China; (D.L.); (L.H.); (Y.G.); (Z.T.); (B.F.)
| | - Bei Fan
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, No. 2 Yuan Ming Yuan West Road, Beijing 100193, China; (D.L.); (L.H.); (Y.G.); (Z.T.); (B.F.)
- Key Laboratory of Agro-Products Quality and Safety Control in Storage and Transport Process, Ministry of Agriculture and Rural Affairs, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Fengzhong Wang
- Key Laboratory of Agro-Products Quality and Safety Control in Storage and Transport Process, Ministry of Agriculture and Rural Affairs, Chinese Academy of Agricultural Sciences, Beijing 100193, China
- Key Laboratory of Agro-Products Processing, Ministry of Agriculture and Rural Affairs, Chinese Academy of Agricultural Sciences, Beijing 100193, China
- Correspondence: (F.W.); (S.L.); Tel.: +86-010-62815977 (F.W.); +86-010-62810295 (S.L.)
| | - Shuying Li
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, No. 2 Yuan Ming Yuan West Road, Beijing 100193, China; (D.L.); (L.H.); (Y.G.); (Z.T.); (B.F.)
- Correspondence: (F.W.); (S.L.); Tel.: +86-010-62815977 (F.W.); +86-010-62810295 (S.L.)
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YAN D, LIN Y, QIU J, LIN L, YANG C, GAO X. Correlation analysis between soluble sugars of soybean and mucus drawing length of fermented natto. FOOD SCIENCE AND TECHNOLOGY 2022. [DOI: 10.1590/fst.91522] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | | | - Jing QIU
- South China Agricultural University, China
| | | | - Cunyi YANG
- South China Agricultural University, China
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Hsieh KC, Lin TC, Kuo MI. Effect of whole chia seed flour on gelling properties, microstructure and texture modification of tofu. Lebensm Wiss Technol 2022. [DOI: 10.1016/j.lwt.2021.112676] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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12
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Hu Z, Sha X, Huang T, Yuan C, Chen W, Li X, Tu Z. Gelling properties and structure modification of tilapia skin gelatin by the addition of γ‐polyglutamic acid at different pH levels. Int J Food Sci Technol 2021. [DOI: 10.1111/ijfs.15198] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Zi‐Zi Hu
- National R&D Center for Freshwater Fish Processing Jiangxi Normal University Nanchang 330022 China
- Engineering Research Center for Freshwater Fish High‐value Utilization of Jiangxi Jiangxi Normal University Nanchang 330022 China
| | - Xiao‐Mei Sha
- National R&D Center for Freshwater Fish Processing Jiangxi Normal University Nanchang 330022 China
- Engineering Research Center for Freshwater Fish High‐value Utilization of Jiangxi Jiangxi Normal University Nanchang 330022 China
| | - Tao Huang
- College of Food and Pharmaceutical Sciences Ningbo University Ningbo Zhejiang 315800 China
| | - Chun‐Hong Yuan
- Department of Food Production and Environmental Management Faculty of Agriculture Iwate University Morioka Iwate 020‐8550 Japan
| | - Wen‐Mei Chen
- National R&D Center for Freshwater Fish Processing Jiangxi Normal University Nanchang 330022 China
- Engineering Research Center for Freshwater Fish High‐value Utilization of Jiangxi Jiangxi Normal University Nanchang 330022 China
| | - Xiao‐Xiao Li
- National R&D Center for Freshwater Fish Processing Jiangxi Normal University Nanchang 330022 China
- Engineering Research Center for Freshwater Fish High‐value Utilization of Jiangxi Jiangxi Normal University Nanchang 330022 China
| | - Zong‐Cai Tu
- National R&D Center for Freshwater Fish Processing Jiangxi Normal University Nanchang 330022 China
- Engineering Research Center for Freshwater Fish High‐value Utilization of Jiangxi Jiangxi Normal University Nanchang 330022 China
- State Key Laboratory of Food Science and Technology Nanchang University Nanchang 330047 China
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13
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Liang Y, Teng F, He M, Jiang L, Yu J, Wang X, Li Y, Wang Z. Effects of ultrasonic treatment on the structure and rehydration peculiarity of freeze-dried soy protein isolate gel. FOOD STRUCTURE 2021. [DOI: 10.1016/j.foostr.2020.100169] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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14
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Mechanism of change of the physicochemical characteristics, gelation process, water state, and microstructure of okara tofu analogues induced by high-intensity ultrasound treatment. Food Hydrocoll 2021. [DOI: 10.1016/j.foodhyd.2020.106241] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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15
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Pang Z, Safdar B, Wang Y, Sun M, Liu X. Improvement of tribo-rheological properties of acid soymilk gels by reinforcement of 7S or 11S proteins. Food Hydrocoll 2021. [DOI: 10.1016/j.foodhyd.2020.106173] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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16
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Xie X, Wu X, Shen Y, Song M, Xu C, Zhang B, Aziz U, Xu X. Effect of poly-γ-glutamic acid on hydration and structure of wheat gluten. J Food Sci 2020; 85:3214-3219. [PMID: 32857865 DOI: 10.1111/1750-3841.15400] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2020] [Revised: 06/17/2020] [Accepted: 07/07/2020] [Indexed: 11/29/2022]
Abstract
In recent years, hydrocolloids have been used extensively as enhancers in dough products. However, studies on the effect of hydrophilic polymers on wheat gluten (WG) within the dough are scarce. In the present study, poly-γ-glutamic acid (γ-PGA), a new and healthy food additive, was added to the WG to investigate its effect on hydration, rheological properties, and structures of WG. Results showed that with the addition of γ-PGA, the water-holding capacity (WHC) of WG and the content of bound water increased, whereas the content of immobilized water decreased. In addition, γ-PGA changed the rheological properties of WG. The elastic properties of WG gradually weakened and the viscous properties gradually increased. Furthermore, scanning electron microscopy (SEM) results showed that with the addition of γ-PGA, the structure of the WG network became more uniform and the pore size was smaller. A change also occurred in the secondary structure of WG, in which the α-helix content was significantly reduced while the contents of β-turn angles were significantly increased, thereby suggesting that γ-PGA not only functions as a filler in the WG system, but also interacts with WG. From the present study, we conclude that γ-PGA can interact with WG and water to change the WG secondary structure. γ-PGA can also restrict moisture migration and enhance the WHC of WG, thereby changing the WG microstructure and improving its functional properties. This condition provides the basis for γ-PGA to be recommended as WG enhancer for addition in WG-containing products such as bread, seitan (meat replacement), and others. PRACTICAL APPLICATION: WG performance plays a key role in the quality of flour products. Thus, many studies have been conducted to improve the WG quality to produce highly popular flour products. The results of this study showed that γ-PGA can interact with WG and water, and had a good effect on improving the WHC of WG, which means that γ-PGA has potential usefulness in improving the quality of WG and WG-containing products such as bread, seitan (meat replacement), and others.
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Affiliation(s)
- Xinhua Xie
- College of Food Science and Technology, Henan Agricultural University, Zhengzhou, Henan, 450002, P. R. China
| | - Xiuyuan Wu
- College of Food Science and Technology, Henan Agricultural University, Zhengzhou, Henan, 450002, P. R. China.,Henan Grain, oil and feed products Quality Inspection Supervision Center, Zhengzhou, Henan, 450002, P. R. China
| | - Yue Shen
- College of Food Science and Technology, Henan Agricultural University, Zhengzhou, Henan, 450002, P. R. China
| | - Miao Song
- College of Food Science and Technology, Henan Agricultural University, Zhengzhou, Henan, 450002, P. R. China
| | - Chao Xu
- College of Food Science and Technology, Henan Agricultural University, Zhengzhou, Henan, 450002, P. R. China
| | - Bei Zhang
- College of Food Science and Technology, Henan Agricultural University, Zhengzhou, Henan, 450002, P. R. China
| | - Usman Aziz
- College of Agronomy, Northwest A&F University, Yangling, 712100, P. R. China
| | - Xinjun Xu
- College of Food Science and Technology, Henan Agricultural University, Zhengzhou, Henan, 450002, P. R. China
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17
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Xing G, Giosafatto CVL, Carpentieri A, Pasquino R, Dong M, Mariniello L. Gelling behavior of bio-tofu coagulated by microbial transglutaminase combined with lactic acid bacteria. Food Res Int 2020; 134:109200. [DOI: 10.1016/j.foodres.2020.109200] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2019] [Revised: 03/21/2020] [Accepted: 03/26/2020] [Indexed: 12/23/2022]
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18
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Tailoring Physical and Sensory Properties of Tofu by the Addition of Jet-Milled, Superfine, Defatted Soybean Flour. Foods 2019; 8:foods8120617. [PMID: 31775330 PMCID: PMC6963333 DOI: 10.3390/foods8120617] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2019] [Revised: 11/21/2019] [Accepted: 11/22/2019] [Indexed: 11/16/2022] Open
Abstract
The use of defatted soybean flour (DSF) in food as a source of dietary fiber has been limited due to its rough texture and bitter taste. Our previous work indicates that superfine DSF prepared by jet milling could overcome these problems, as it positively affected physical and sensory properties. Therefore, differently sized DSFs were incorporated in tofu, and their impacts on physical and sensory properties were investigated in this study. Coarse DSF (Dv50 = 341.0 µm), fine DSF (Dv50 = 105.3 µm), and superfine DSF (Dv50 = 5.1 µm) were prepared by conventional sifting and jet milling. Tofu was made with a 5% addition of differently sized DSFs and without DSF (control tofu). The quality of tofu was evaluated by scanning electron microscopy, color measurement, texture profile analysis, and quantitative descriptive analysis. The tofu made with coarse and fine DSF showed negative changes in its physical and organoleptic qualities, such as reduced yields, a less pure color, a harder texture, and a rougher mouthfeel. However, the tofu made with superfine DSF showed only minimal changes in its qualities compared to the control. Therefore, superfine DSF is a promising fiber supplement that does not change the physical and sensory properties in the making of high-quality tofu.
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Zhao Y, Cao F, Li X, Mu D, Zhong X, Jiang S, Zheng Z, Luo S. Effects of different salts on the gelation behaviour and mechanical properties of citric acid‐induced tofu. Int J Food Sci Technol 2019. [DOI: 10.1111/ijfs.14348] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yan‐Yan Zhao
- Key Laboratory for Agricultural Products Processing of Anhui Province School of Food and Bioengineering Hefei University of Technology Hefei 230009 China
| | - Feng‐Hong Cao
- Key Laboratory for Agricultural Products Processing of Anhui Province School of Food and Bioengineering Hefei University of Technology Hefei 230009 China
| | - Xing‐Jiang Li
- Key Laboratory for Agricultural Products Processing of Anhui Province School of Food and Bioengineering Hefei University of Technology Hefei 230009 China
| | - Dong‐Dong Mu
- Key Laboratory for Agricultural Products Processing of Anhui Province School of Food and Bioengineering Hefei University of Technology Hefei 230009 China
| | - Xi‐Yang Zhong
- Key Laboratory for Agricultural Products Processing of Anhui Province School of Food and Bioengineering Hefei University of Technology Hefei 230009 China
| | - Shao‐Tong Jiang
- Key Laboratory for Agricultural Products Processing of Anhui Province School of Food and Bioengineering Hefei University of Technology Hefei 230009 China
| | - Zhi Zheng
- Key Laboratory for Agricultural Products Processing of Anhui Province School of Food and Bioengineering Hefei University of Technology Hefei 230009 China
| | - Shui‐Zhong Luo
- Key Laboratory for Agricultural Products Processing of Anhui Province School of Food and Bioengineering Hefei University of Technology Hefei 230009 China
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20
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Zhu J, Deng H, Yang A, Wu Z, Li X, Tong P, Chen H. Effect of microbial transglutaminase cross-linking on the quality characteristics and potential allergenicity of tofu. Food Funct 2019; 10:5485-5497. [PMID: 31411222 DOI: 10.1039/c9fo01118h] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2023]
Abstract
Microbial transglutaminase (MTGase) has been developed as a new tofu coagulant in recent years due to its good hydrophilicity, high catalytic activity, and strong thermal stability. This study aimed to investigate the effect of MTGase on the physicochemical properties and immunoreactivity of tofu relative to conventional coagulants [brine and glucono-δ-lactone (GDL)]. Structural changes of the MTGase cross-linked soymilk protein were characterized by sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE), circular dichroism (CD) spectroscopy, ultraviolet (UV) absorption spectroscopy, and fluorescence spectroscopy. The IgE-binding capacity of MTGase cross-linked proteins was tested by enzyme-linked immunosorbent assay (ELISA). The physicochemical properties, quality characteristics, and surface microstructures of five different types of tofu were determined by the Kjeldahl nitrogen method, texture analysis, and scanning electron microscopy (SEM). The digestibility of tofu was evaluated in vitro by simulated gastrointestinal (GIS) digestion. A cell sensitization experiment was performed in vitro to evaluate the capability of tofu digestion products to induce the release of bioactive mediators from human basophil leukemia (KU812) cells. Results indicated that MTGase significantly changed the advanced structure of the soymilk protein. Compared with tofu without MTGase, the composite coagulant tofu containing MTGase exhibited better quality. MTGase improved the water-holding capacity (WHC) of the internal mesh structure and increased the yield of tofu. The digestion products of the composite coagulant tofu, especially the GDL plus MTGase tofu, induced KU812 cells to release fewer bioactive mediators compared with those of MTGase-free tofu. MTGase can not only improve the quality of conventional coagulant tofu but also reduce the potential allergenicity of tofu to a certain extent.
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Affiliation(s)
- Jierui Zhu
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanjing Dong Lu 235, Nanchang 330047, China. and Sino-German Joint Research Institute, Nanchang University, Nanjing Dong Lu 235, Nanchang 330047, China
| | - Han Deng
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanjing Dong Lu 235, Nanchang 330047, China. and Sino-German Joint Research Institute, Nanchang University, Nanjing Dong Lu 235, Nanchang 330047, China
| | - Anshu Yang
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanjing Dong Lu 235, Nanchang 330047, China. and Sino-German Joint Research Institute, Nanchang University, Nanjing Dong Lu 235, Nanchang 330047, China
| | - Zhihua Wu
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanjing Dong Lu 235, Nanchang 330047, China. and Sino-German Joint Research Institute, Nanchang University, Nanjing Dong Lu 235, Nanchang 330047, China
| | - Xin Li
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanjing Dong Lu 235, Nanchang 330047, China.
| | - Ping Tong
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanjing Dong Lu 235, Nanchang 330047, China.
| | - Hongbing Chen
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanjing Dong Lu 235, Nanchang 330047, China. and Sino-German Joint Research Institute, Nanchang University, Nanjing Dong Lu 235, Nanchang 330047, China
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21
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Quality characteristics and storage stability of low-fat tofu prepared with defatted soy flours treated by supercritical-CO2 and hexane. Lebensm Wiss Technol 2019. [DOI: 10.1016/j.lwt.2018.10.073] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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22
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Guo Y, Hu H, Wang Q, Liu H. A novel process for peanut tofu gel: Its texture, microstructure and protein behavioral changes affected by processing conditions. Lebensm Wiss Technol 2018. [DOI: 10.1016/j.lwt.2018.05.020] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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23
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Effect of poly-γ-glutamic acid on the stability of set yoghurts. Journal of Food Science and Technology 2018; 55:4634-4641. [PMID: 30333660 DOI: 10.1007/s13197-018-3404-7] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Revised: 08/14/2018] [Accepted: 08/15/2018] [Indexed: 10/28/2022]
Abstract
The effects of poly-γ-glutamic acid (γ-PGA) on the stability of yogurt were studied in terms of texture, rheology, particle size, and microstructure. The effects of γ-PGA on the pH and water holding capacity (WHC) of yogurt during refrigeration were also studied. The tan δ value of the yogurt with 0.04% (w/w) γ-PGA was significantly lower than that of control. The addition of γ-PGA decreased the particle size. The yogurt with 0.02% (w/w) γ-PGA had denser network structure with less porosity, and cross-linking between complexes occurred with greater frequency. The pH of the yogurt supplemented with 0.02% and 0.04% γ-PGA was significantly higher. WHC increased with the amount of γ-PGA. The addition of γ-PGA to yogurt strengthened the antishear ability, inhibited the postacidification phenomenon, and improved stability during refrigeration.
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24
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Effects of organic acid coagulants on the physical properties of and chemical interactions in tofu. Lebensm Wiss Technol 2017. [DOI: 10.1016/j.lwt.2017.07.005] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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25
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Li C, Rui X, Zhang Y, Cai F, Chen X, Jiang M. Production of tofu by lactic acid bacteria isolated from naturally fermented soy whey and evaluation of its quality. Lebensm Wiss Technol 2017. [DOI: 10.1016/j.lwt.2017.04.054] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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26
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Shen YR, Kuo MI. Effects of different carrageenan types on the rheological and water-holding properties of tofu. Lebensm Wiss Technol 2017. [DOI: 10.1016/j.lwt.2016.12.038] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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27
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Zhao H, Wang Y, Li W, Qin F, Chen J. Effects of Oligosaccharides and Soy Soluble Polysaccharide on the Rheological and Textural Properties of Calcium Sulfate-Induced Soy Protein Gels. FOOD BIOPROCESS TECH 2016. [DOI: 10.1007/s11947-016-1826-7] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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28
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Xu Y, Tao Y, Shivkumar S. Effect of freeze-thaw treatment on the structure and texture of soft and firm tofu. J FOOD ENG 2016. [DOI: 10.1016/j.jfoodeng.2016.06.022] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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29
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Gomaa EZ. Cryoprotection of probiotic bacteria with poly-γ-glutamic acid produced by Bacillus subtilis and Bacillus licheniformis. J Genet Eng Biotechnol 2016; 14:269-279. [PMID: 30647625 PMCID: PMC6299871 DOI: 10.1016/j.jgeb.2016.10.001] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2015] [Revised: 09/20/2016] [Accepted: 10/17/2016] [Indexed: 11/24/2022]
Abstract
Poly-γ-glutamic acid (γ-PGA) is a naturally occurring biopolymer made up of repeating units of glutamic acid and can be potentially used for multiple applications. This study compared the production of γ-PGA by Bacillus subtilis and Bacillus licheniformis in GS and E media. The highest γ-PGA production was achieved using initial glycerol concentration of 40 and 80 g/l, ammonium chloride as the nitrogen source, 20 g/l glutamic acid at pH 6.5 for 72 h using E medium. On characterization, it was observed that glutamic acid was the sole component of the purified material. It contained a mixture of Na-γ-PGA and H+-γ-PGA. The survival of probiotics during freeze drying was improved by combining them with γ-PGA polymer. For Lactobacilli, 10% γ-PGA protected the cells significantly than 10% sucrose during freeze drying. γ-PGA protection was shown to improve the viability of probiotic bacteria in orange juice for 40 days. No considerable change was observed in the concentrations of citric acid, malic acid and ascorbic acid when probiotic bacteria and γ-PGA were introduced into orange juice and hence, it could be used as a non-dairy delivery platform for these bacteria.
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Affiliation(s)
- Eman Zakaria Gomaa
- Department of Biological and Geological Sciences, Faculty of Education, Ain Shams University, Cairo, Egypt
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30
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Lin HF, Lu CP, Hsieh JF, Kuo MI. Effect of ultrasonic treatment on the rheological property and microstructure of tofu made from different soybean cultivars. INNOV FOOD SCI EMERG 2016. [DOI: 10.1016/j.ifset.2016.08.013] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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31
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Changes in quality characteristics of tofu with freezing treatment of soybeans. Food Sci Biotechnol 2016; 25:757-761. [PMID: 30263333 DOI: 10.1007/s10068-016-0129-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2015] [Revised: 03/11/2016] [Accepted: 03/18/2016] [Indexed: 10/21/2022] Open
Abstract
The aim of this study was to investigate the influence of length of freezing time (-18°C for 5 or 24 h) on the quality characteristics of tofu. The yield and moisture content of tofu obtained from frozen soybean were lower than control tofu. Tofu made from frozen soybeans showed higher hardness, gumminess and chewiness than the control. Freezing treatment also made the microstructure of the tofu more uniform than the control. However, after 24-h freezing, hardness decreased and the microstructure of tofu appeared to form pores. Sensory evaluation showed that mouth-feel decreased with an increase of freezing time. Among all of tofu frozen at -18°C, 5-h freezing treatment showed the highest overall acceptability. These results indicate that the length of time that soybeans are frozen before making tofu affects the quality of tofu.
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Peng Y, Zhang T, Mu W, Miao M, Jiang B. Intracellular synthesis of glutamic acid in Bacillus methylotrophicus SK19.001, a glutamate-independent poly(γ-glutamic acid)-producing strain. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2016; 96:66-72. [PMID: 26112100 DOI: 10.1002/jsfa.7318] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/07/2015] [Revised: 06/21/2015] [Accepted: 06/22/2015] [Indexed: 05/08/2023]
Abstract
BACKGROUND Bacillus methylotrophicus SK19.001 is a glutamate-independent strain that produces poly(γ-glutamic acid) (γ-PGA), a polymer of D- and L-glutamic acids that possesses applications in food, the environment, agriculture, etc. This study was undertaken to explore the synthetic pathway of intracellular L- and D-glutamic acid in SK19.001 by investigating the effects of tricarboxylic acid cycle intermediates and different amino acids as metabolic precursors on the production of γ-PGA and analyzing the activities of the enzymes involved in the synthesis of L- and D-glutamate. RESULTS Tricarboxylic acid cycle intermediates and amino acids could participate in the synthesis of γ-PGA via independent pathways in SK19.001. L-Aspartate aminotransferase, L-glutaminase and L-glutamate synthase were the enzymatic sources of L-glutamate. Glutamate racemase was responsible for the formation of D-glutamate for the synthesis of γ-PGA, and the synthetase had stereoselectivity for glutamate substrate. CONCLUSION The enzymatic sources of L-glutamate were investigated for the first time in the glutamate-independent γ-PGA-producing strain, and multiple enzymatic sources of L-glutamate were verified in SK19.001, which will benefit efforts to improve production of γ-PGA with metabolic engineering strategies.
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Affiliation(s)
- Yingyun Peng
- State Key Laboratory of Food Science and Technology, Ministry of Education, Key Laboratory of Carbohydrate Chemistry & Biotechnology, Jiangnan University, Wuxi, Jiangsu, 214122, China
- School of Chemical and Biological Engineering, Yancheng Institute of Technology, Yancheng, Jiangsu 22400, China
| | - Tao Zhang
- State Key Laboratory of Food Science and Technology, Ministry of Education, Key Laboratory of Carbohydrate Chemistry & Biotechnology, Jiangnan University, Wuxi, Jiangsu, 214122, China
| | - Wanmeng Mu
- State Key Laboratory of Food Science and Technology, Ministry of Education, Key Laboratory of Carbohydrate Chemistry & Biotechnology, Jiangnan University, Wuxi, Jiangsu, 214122, China
| | - Ming Miao
- State Key Laboratory of Food Science and Technology, Ministry of Education, Key Laboratory of Carbohydrate Chemistry & Biotechnology, Jiangnan University, Wuxi, Jiangsu, 214122, China
| | - Bo Jiang
- State Key Laboratory of Food Science and Technology, Ministry of Education, Key Laboratory of Carbohydrate Chemistry & Biotechnology, Jiangnan University, Wuxi, Jiangsu, 214122, China
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Chen CC, Chen ST, Hsieh JF. Proteomic analysis of polysaccharide-milk protein interactions induced by chitosan. Molecules 2015; 20:7737-49. [PMID: 25927902 PMCID: PMC6272545 DOI: 10.3390/molecules20057737] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2015] [Revised: 04/19/2015] [Accepted: 04/23/2015] [Indexed: 11/16/2022] Open
Abstract
The chitosan-induced coacervation of milk proteins was investigated using a proteomic approach. The addition of 0.8% chitosan to milk caused the milk proteins to coacervate after a 1 h incubation period. Approximately 86% of the milk proteins were present in the milk pellet fraction (MPF), and the protein concentration of the milk supernatant fraction (MSF) decreased from 29.4±0.2 to 4.2±0.6 mg/mL. SDS-PAGE analysis showed that the total intensities of serum albumin (BSA), αS-casein (αS-CN), β-casein (β-CN), κ-casein (κ-CN) and β-lactoglobulin (β-LG) in the MSF decreased to 8.5%±0.2%, 0.9%±0.3%, 0.7%±0.3%, 0.5%±0.2% and 15.0%±0.5%, respectively. Two-dimensional electrophoresis analysis indicated that αS1-, αS2-, β- and κ-CN and a fraction of the β-LG and BSA were found in the MSF following incubation with 0.8% chitosan. Isothermal titration calorimetry analysis indicated that binding of chitosan to milk proteins is an exothermic reaction based on binding titration curves of milk proteins dispersions with chitosan, and the enthalpy of binding (ΔH) and binding constant (Ka) were -7.85×10(4) cal/mol and 1.06×10(5)/mol, respectively. These results suggested that the addition of 0.8% chitosan causes milk proteins to coacervate due to polysaccharide-protein interactions.
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Affiliation(s)
- Chun-Chi Chen
- Ph.D. Program in Nutrition & Food Science, Fu Jen Catholic University, Taipei 242, Taiwan.
- Department of Food Science, Fu Jen Catholic University, Taipei 242, Taiwan.
| | - Shui-Tein Chen
- Institute of Biological Chemistry, Academia Sinica, Taipei 115, Taiwan.
| | - Jung-Feng Hsieh
- Ph.D. Program in Nutrition & Food Science, Fu Jen Catholic University, Taipei 242, Taiwan.
- Department of Food Science, Fu Jen Catholic University, Taipei 242, Taiwan.
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35
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Preparation of organic tofu using organic compatible magnesium chloride incorporated with polysaccharide coagulants. Food Chem 2015; 167:168-74. [DOI: 10.1016/j.foodchem.2014.06.102] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2014] [Revised: 04/30/2014] [Accepted: 06/25/2014] [Indexed: 11/17/2022]
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36
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de Cesaro A, da Silva SB, da Silva VZ, Ayub MAZ. Physico-chemical and rheological characterization of poly-gamma-glutamic acid produced by a new strain of Bacillus subtilis. Eur Polym J 2014. [DOI: 10.1016/j.eurpolymj.2014.04.017] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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37
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Lee NR, Lee SM, Cho KS, Jeong SY, Hwang DY, Kim DS, Hong CO, Son HJ. Improved Production of Poly-γ-Glutamic Acid by Bacillus subtilis D7 Isolated from Doenjang, a Korean Traditional Fermented Food, and Its Antioxidant Activity. Appl Biochem Biotechnol 2014; 173:918-32. [DOI: 10.1007/s12010-014-0908-0] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2014] [Accepted: 04/03/2014] [Indexed: 10/25/2022]
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38
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Lee NR, Go TH, Lee SM, Jeong SY, Park GT, Hong CO, Son HJ. In vitro evaluation of new functional properties of poly-γ-glutamic acid produced by Bacillus subtilis D7. Saudi J Biol Sci 2014; 21:153-8. [PMID: 24600308 PMCID: PMC3942858 DOI: 10.1016/j.sjbs.2013.09.004] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2013] [Revised: 09/10/2013] [Accepted: 09/10/2013] [Indexed: 11/24/2022] Open
Abstract
We investigated the functionality of poly-γ-glutamic acid (γ-PGA), which is produced by Bacillus subtilis D7, for its potential applications in medicine and cosmetics. The γ-PGA had angiotensin-converting enzyme (ACE) inhibition activity. ACE inhibition activity was dependent on the γ-PGA concentration; the highest ACE inhibition activity was observed at 1.25 mg/l of γ-PGA. IC50 (0.108 mg/ml) of the γ-PGA was lower than that of standard ACE inhibitory drug, N-[(S)-mercapto-2-methylpropionyl]-L-proline (0.247 mg/ml). The γ-PGA also had water-holding capacity and hygroscopicity. Furthermore, the γ-PGA inhibited growth of some pathogenic bacteria, including Listeria monocytogenes, Salmonella typhimurium, Staphylococcus aureus, Klebsiella pneumonia and Esherichia coli. The γ-PGA exhibited a good metal adsorption capacity; Cr (VI) adsorption capacity of γ-PGA increased with decreasing pH, and the maximal adsorption was observed at pH 2. Our results suggest that γ-PGA may be expected to be widely applied in cosmetics, biomedical and environmental industries with the feature of being less harmful to humans and the environment.
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Affiliation(s)
- Na-Ri Lee
- Department of Life Science and Environmental Biochemistry, Life and Industry Convergence Institute, Pusan National University, Miryang 627-706, Republic of Korea
| | - Tae-Hun Go
- Department of Life Science and Environmental Biochemistry, Life and Industry Convergence Institute, Pusan National University, Miryang 627-706, Republic of Korea
| | - Sang-Mee Lee
- Department of Life Science and Environmental Biochemistry, Life and Industry Convergence Institute, Pusan National University, Miryang 627-706, Republic of Korea
| | - Seong-Yun Jeong
- Department of Medical Life Science, Catholic University of Daegu, Daegu 712-784, Republic of Korea
| | - Geun-Tae Park
- Research and University-Industry Cooperation, Pusan National University, Busan 609-735, Republic of Korea
| | - Chang-Oh Hong
- Department of Life Science and Environmental Biochemistry, Life and Industry Convergence Institute, Pusan National University, Miryang 627-706, Republic of Korea
| | - Hong-Joo Son
- Department of Life Science and Environmental Biochemistry, Life and Industry Convergence Institute, Pusan National University, Miryang 627-706, Republic of Korea
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LIM SUMIN, SHIM JAEYONG, OH SEJONG, RHEE MINSUK, SUNG MOONHEE, IMM JEEYOUNG. Effects of poly-γ-glutamic acid on the physicochemical characteristics of skim milk yoghurt. INT J DAIRY TECHNOL 2012. [DOI: 10.1111/j.1471-0307.2012.00836.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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