1
|
Zhao Y, Tian R, Zhang Q, Jiang L, Wang J, Zhang Y, Sui X. Enhancing the properties of soy protein isolate and dialdehyde starch films for food packaging applications through tannic acid crosslinking. Carbohydr Polym 2024; 332:121903. [PMID: 38431410 DOI: 10.1016/j.carbpol.2024.121903] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2023] [Revised: 01/28/2024] [Accepted: 01/30/2024] [Indexed: 03/05/2024]
Abstract
The utilization of naturally derived biodegradable polymers, including proteins, polysaccharides, and polyphenols, holds significant promise in addressing environmental concerns and reducing reliance on nonrenewable resources. This study aimed to develop films with enhanced UV resistance and antibacterial capabilities by covalently cross-linking soy protein isolate (SPI) with dialdehyde starch (DAS) through the incorporation of tannic acid (TA). The covalent crosslinking of TA with DAS and SPI was shown to establish a stable chemical cross-linking network. The tensile strength of the resulting SPI/DAS/15TA film exhibited a remarkable increase of 208.27 % compared to SPI alone and 52.99 % compared to SPI/DAS film. Notably, the UV absorption range of SPI/DAS/10TA films extended from 200 nm to 389 nm. This augmentation can be attributed to the oxidation of TA's phenolic hydroxyl groups to quinone under alkaline conditions, which then facilitated cross-linking with the SPI chain via Michael addition and Schiff base reactions. Furthermore, the film demonstrated robust antibacterial properties due to the incorporation of TA. Collectively, the observed properties highlight the significant potential of the SPI/DAS/10TA film for applications in food packaging, where its enhanced mechanical strength, UV resistance, and antibacterial characteristics can contribute to improved product preservation and safety.
Collapse
Affiliation(s)
- Yuan Zhao
- College of Food Science, Northeast Agricultural University, Harbin 150030, China
| | - Ran Tian
- College of Food Science, Northeast Agricultural University, Harbin 150030, China
| | - Qin Zhang
- College of Food Science, Northeast Agricultural University, Harbin 150030, China
| | - Lianzhou Jiang
- College of Food Science, Northeast Agricultural University, Harbin 150030, China
| | - Jing Wang
- Key Laboratory of Geriatric Nutrition and Health (Beijing Technology and Business University), Ministry of Education, Beijing 100048, China.
| | - Yan Zhang
- College of Horticulture and Landscape Architecture, Northeast Agricultural University, Harbin 150030, China.
| | - Xiaonan Sui
- College of Food Science, Northeast Agricultural University, Harbin 150030, China.
| |
Collapse
|
2
|
Ren P, Wei D, Liang M, Xu L, Zhang T, Zhang Q. Alginate/gelatin-based hybrid hydrogels with function of injecting and encapsulating cells in situ. Int J Biol Macromol 2022; 212:67-84. [PMID: 35588977 DOI: 10.1016/j.ijbiomac.2022.05.058] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2022] [Revised: 04/23/2022] [Accepted: 05/08/2022] [Indexed: 12/18/2022]
Abstract
Multi-network hydrogels with high strength and toughness have attracted increasing attention. Herein, a hybrid hydrogel consisting of alginate, gelatin, and polyacrylamide was constructed with the combination of advantages of natural and synthetic polymers. Alginate grafted with host-guest complex of βCD/Ad-AAm was first prepared, namely Alg-βCD/Ad-AAm, then further crosslink with gelatin methacryloyl (GelMA) to form hydrogel via one-step UV light initiation. The hydrogel produced by this method has more uniform and well-crosslinked networks. The hydrogels demonstrated uniform porosity, adjustable hydrophilicity (water contact angle within 32.7-91.5°), and desired mechanical properties (maximum tensile strain of 242.8%, tensile strength of 75.9 kPa, and Young's modulus of 28.5 kPa). The hydrogel also possessed self-healing ability and pH sensitivity, showing higher mechanical tensile strength at lower pH. The temperature-adjustable viscosity of pre-gel solution (sol-gel transition point of 20.4 °C) endowed it to be 3D printed as a bioink, and the printed scaffold exhibited good resilience and toughness. Moreover, HUVEC, L929, and 3T3 cells were cultured on hydrogel surfaces for 28 days and were enveloped within the hydrogels for 3D culture, indicating excellent cytocompatibility of the hydrogels. Therefore, this hybrid hydrogel system can be used potentially in 3D cell culture and tissue engineering.
Collapse
Affiliation(s)
- Pengfei Ren
- State Key Laboratory of Bioelectronics, National Demonstration Center for Experimental Biomedical Engineering Education, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, China
| | - Dandan Wei
- State Key Laboratory of Bioelectronics, National Demonstration Center for Experimental Biomedical Engineering Education, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, China
| | - Min Liang
- State Key Laboratory of Bioelectronics, National Demonstration Center for Experimental Biomedical Engineering Education, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, China
| | - Li Xu
- State Key Laboratory of Bioelectronics, National Demonstration Center for Experimental Biomedical Engineering Education, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, China
| | - Tianzhu Zhang
- State Key Laboratory of Bioelectronics, National Demonstration Center for Experimental Biomedical Engineering Education, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, China.
| | - Qianli Zhang
- School of Chemistry and Life Science, Suzhou University of Science and Technology, Suzhou 215009, China
| |
Collapse
|
3
|
Abstract
Collagens represent a large family of structurally related proteins containing a unique triple-helical structure. Among them, the fibril-forming collagens are the most abundant in vertebrates providing tissues with form and stability. One of the characteristics of the fibrillar collagens is its sequential posttranslational modifications of specific lysine residues that have major effects on molecular assembly and stability of the fibrils in the extracellular space. Hydroxylation of lysine residues is the first modification catalyzed by lysyl hydroxylases, and is critical for the following glycosylation and in determining the fate of covalent cross-linking. This chapter presents an overview of lysine hydroxylation and cross-linking of collagen, and the analytical methods we have developed.
Collapse
Affiliation(s)
- Mitsuo Yamauchi
- Department of Oral and Craniofacial Health Sciences, School of Dentistry, University of North Carolina, Chapel Hill, NC, USA.
| | - Masahiko Terajima
- Department of Oral and Craniofacial Health Sciences, School of Dentistry, University of North Carolina, Chapel Hill, NC, USA
| | - Masashi Shiiba
- Department of Oral Science, Graduate School of Medicine, Chiba University, Chiba, Japan
| |
Collapse
|
4
|
Ding S, Fang D, Pang Z, Luo B, Kuang L, Wang H, Zhang Q, Shen Q, Ji F. Immobilization of powdery calcium silicate hydrate via PVA covalent cross-linking process for phosphorus removal. Sci Total Environ 2018; 645:937-945. [PMID: 30032089 DOI: 10.1016/j.scitotenv.2018.07.197] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2018] [Revised: 07/15/2018] [Accepted: 07/15/2018] [Indexed: 06/08/2023]
Abstract
Calcium silicate hydrate (CSH) is a popular material used for phosphorus removal in recent years. In this work, a novel immobilized material, polyvinyl alcohol-CSH (PVA-CSH), was prepared using a 1:10 weight ratio of CSH powder to 8% PVA solution and then used for phosphorus removal. Samples were characterized by scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR). The adsorption mechanism and practical application properties of phosphorus wastewater were studied by sequential batch and continuous flow experiment. The results showed PVA-CSH possessed a porous network structure and an average pore diameter of 24.94 ± 0.11 nm. Furthermore, the CSH functional groups were unaffected by PVA immobilization. Compared with CSH, PVA-CSH did not easily lose CSH after being immobilized by PVA, and the duration of efficient phosphorus removal stage was approximately 20 h longer than that of CSH. In addition, the effluent turbidity of PVA-CSH was 0.11 ± 0.03 NTU during the continuous operation period, which was significantly lower than CSH. In summary, this research study demonstrated the significant potential of PVA-CSH for practical phosphorus removal.
Collapse
Affiliation(s)
- Shilin Ding
- Key Laboratory of Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, China
| | - Dexin Fang
- Key Laboratory of Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, China
| | - Zishan Pang
- Chongqing Yuxi Water Co., Ltd, Chongqing 402160, China
| | - Bin Luo
- Chongqing Yuxi Water Co., Ltd, Chongqing 402160, China
| | - Li Kuang
- Chongqing Gangli Environmental Protection Co., Ltd, Chongqing 404100, China
| | - Han Wang
- Key Laboratory of Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, China
| | - Qian Zhang
- Key Laboratory of Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, China
| | - Qiushi Shen
- Key Laboratory of Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, China
| | - Fangying Ji
- Key Laboratory of Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, China.
| |
Collapse
|
5
|
Sheng W, Xi Y, Zhang L, Ye T, Zhao X. Enhanced activity and stability of papain by covalent immobilization on porous magnetic nanoparticles. Int J Biol Macromol 2018; 114:143-148. [PMID: 29567500 DOI: 10.1016/j.ijbiomac.2018.03.088] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2018] [Revised: 03/16/2018] [Accepted: 03/18/2018] [Indexed: 12/11/2022]
Abstract
Papain enzyme was successfully immobilized by covalent bonding onto biocompatible Fe3O4/SF nanoparticles, which were prepared with the soft template of silk fibroin (SF). The optimized immobilization condition is pH6.0, hydrolysis time of 60min, and an enzyme/support ratio of 10.0mg/g. Compared with free papain, the immobilized papain exhibits a high effective activity, broader working pH and temperature. This immobilized papain can be separated from the solution by the external magnetic field for cyclic utilization, and 70% of initial activity was retained after eight consecutive operations while completely loss of proteolytic activity for the free papain. Furthermore, the immobilized papain maintained 85% of their initial activity after being stored for 28days. Kinetic parameters, maximum reaction rate (Vmax) and Michaelis constant (Km) of immobilized papain, were determined as 4.95mg/l·min and 0.23mg/ml, larger than its free counterpart. All the results above indicated that the immobilized papain onto magnetic Fe3O4/SF nanoparticles would have potential industrial and medical applications.
Collapse
Affiliation(s)
- Weiqin Sheng
- Laboratory for Nanoelectronics and Nano Devices, School of Electronic Information, Hangzhou Dianzi University, Hangzhou 310018, PR China
| | - Yinyin Xi
- Zhejiang Provincial Key Laboratory of Silkworm Bioreactor and Biomedicine, College of Life Sciences, Zhejiang Sci-Tech University, Hangzhou 310018, PR China
| | - Luting Zhang
- Zhejiang Provincial Key Laboratory of Silkworm Bioreactor and Biomedicine, College of Life Sciences, Zhejiang Sci-Tech University, Hangzhou 310018, PR China
| | - Ting Ye
- Zhejiang Provincial Key Laboratory of Silkworm Bioreactor and Biomedicine, College of Life Sciences, Zhejiang Sci-Tech University, Hangzhou 310018, PR China
| | - Xueqin Zhao
- Zhejiang Provincial Key Laboratory of Silkworm Bioreactor and Biomedicine, College of Life Sciences, Zhejiang Sci-Tech University, Hangzhou 310018, PR China.
| |
Collapse
|
6
|
Tso D, Peebles CL, Maurer JB, Duda RL, Hendrix RW. On the catalytic mechanism of bacteriophage HK97 capsid crosslinking. Virology 2017; 506:84-91. [PMID: 28359902 DOI: 10.1016/j.virol.2017.03.011] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2016] [Revised: 03/22/2017] [Accepted: 03/23/2017] [Indexed: 10/19/2022]
Abstract
During maturation of the phage HK97 capsid, each of the 415 capsid subunits forms covalent bonds to neighboring subunits, stabilizing the capsid. Crosslinking is catalyzed not by a separate enzyme but by subunits of the assembled capsid in response to conformational rearrangements during maturation. This report investigates the catalytic mechanism. Earlier work established that the crosslinks are isopeptide (amide) bonds between side chains of a lysine on one subunit and an asparagine on another subunit, aided by a catalytic glutamate on a third subunit. The mature capsid structure suggests that the reaction may be facilitated by the arrival of a valine with the lysine to complete a hydrophobic pocket surrounding the glutamate, lysine and asparagine. We show that this valine has an essential role for efficient crosslinking, and that any of six other amino acids can successfully substitute for valine. Evidently none of the remaining 13 amino acids will work.
Collapse
Affiliation(s)
- DanJu Tso
- Department of Biological Sciences, University of Pittsburgh, Pittsburgh, PA 15260, USA
| | - Craig L Peebles
- Department of Biological Sciences, University of Pittsburgh, Pittsburgh, PA 15260, USA
| | - Joshua B Maurer
- Department of Biological Sciences, University of Pittsburgh, Pittsburgh, PA 15260, USA
| | - Robert L Duda
- Department of Biological Sciences, University of Pittsburgh, Pittsburgh, PA 15260, USA
| | - Roger W Hendrix
- Department of Biological Sciences, University of Pittsburgh, Pittsburgh, PA 15260, USA.
| |
Collapse
|