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Antifungal Effect of Chitosan/Nano-TiO 2 Composite Coatings against Colletotrichum gloeosporioides, Cladosporium oxysporum and Penicillium steckii. Molecules 2021; 26:molecules26154401. [PMID: 34361552 PMCID: PMC8347353 DOI: 10.3390/molecules26154401] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2021] [Revised: 07/09/2021] [Accepted: 07/19/2021] [Indexed: 01/23/2023] Open
Abstract
Postharvest pathogens such as C. gloeosporioides (MA), C.oxysporum (ME) and P. steckii (MF) are the causal agents of disease in mangoes. This paper presents an in vitro investigation into the antifungal effect of a chitosan (CTS)/nano-titanium dioxide (TiO2) composite coating against MA, ME and MF. The results indicated that, the rates of MA, ME and MF mortality following the single chitosan treatment were 63.3%, 84.8% and 43.5%, respectively, while the rates of mycelial inhibition were 84.0%, 100% and 25.8%, respectively. However, following the addition of 0.5% nano-TiO2 into the CTS, both the mortality and mycelial inhibition rates for MA and ME reached 100%, and the mortality and mycelial inhibition rate for MF also increased significantly, reaching 75.4% and 57.3%, respectively. In the MA, the dry weight of mycelia after the CTS/0.5% nano-TiO2 treatment decreased by 36.3% in comparison with the untreated group, while the conductivity value was about 1.7 times that of the untreated group, and the protein dissolution rate and extravasation degree of nucleic acids also increased significantly. Thus, this research revealed the potential of CTS/nano-TiO2 composite coatings in the development of new antimicrobial materials.
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Shao X, Sun H, Zhou R, Zhao B, Shi J, Jiang R, Dong Y. Effect of bovine bone collagen and nano-TiO 2 on the properties of hydroxypropyl methylcellulose films. Int J Biol Macromol 2020; 158:937-944. [PMID: 32389656 DOI: 10.1016/j.ijbiomac.2020.04.107] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2020] [Revised: 03/27/2020] [Accepted: 04/15/2020] [Indexed: 12/15/2022]
Abstract
Hydroxypropyl methylcellulose (HPMC) film containing bovine bone collagen (BC) and nano-TiO2 were developed via casting method. The films were characterized by scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FTIR), and their mechanical properties, barrier properties, thermal stability and surface color were investigated. The results showed that polymer matrices of HPMC and BC had good compatibility. The nano-TiO2 could be well embedded and dispersed in the matrix of HPMC/BC films, resulting in homogeneous, continuous and compact structure of the composite films. The addition of BC and nano-TiO2 significantly (p < .05) changed the surface color parameters of the films (p < .05). In addition, the introduction of BC and nano-TiO2 had a positive effect on the improvement of mechanical properties, barrier properties and thermal stability of the HPMC based films. The results suggest that HPMC based films containing BC and nano-TiO2 are more suitable for active packaging in the food industry.
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Affiliation(s)
- Xinru Shao
- College of Food Science and Engineering, Tonghua Normal University, No. 950 Yucai Road, Tonghua 134002, Jilin, PR China; Changbai Mountain Edible Plant Resources Development Engineering Center, Tonghua Normal University, No. 950 Yucai Road, Tonghua, Jilin 134002, PR China.
| | - Haitao Sun
- College of Food Science and Engineering, Tonghua Normal University, No. 950 Yucai Road, Tonghua 134002, Jilin, PR China; Changbai Mountain Edible Plant Resources Development Engineering Center, Tonghua Normal University, No. 950 Yucai Road, Tonghua, Jilin 134002, PR China
| | - Ran Zhou
- College of Food Science and Engineering, Tonghua Normal University, No. 950 Yucai Road, Tonghua 134002, Jilin, PR China
| | - Bingbing Zhao
- College of Food Science and Engineering, Tonghua Normal University, No. 950 Yucai Road, Tonghua 134002, Jilin, PR China
| | - Jinfeng Shi
- College of Food Science and Engineering, Tonghua Normal University, No. 950 Yucai Road, Tonghua 134002, Jilin, PR China
| | - Ruiping Jiang
- College of Food Science and Engineering, Tonghua Normal University, No. 950 Yucai Road, Tonghua 134002, Jilin, PR China; Changbai Mountain Edible Plant Resources Development Engineering Center, Tonghua Normal University, No. 950 Yucai Road, Tonghua, Jilin 134002, PR China
| | - Yu Dong
- Chinese Institute of Jilin Ginseng, No. 666 Longquan Road, Tonghua, Jilin 134001, PR China
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