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Zhai H, Yue C, Li Z, Ma L, Wang T, Zhang H, Wang J, Yang S. MXene/Silk Fibroin Strengthened PVA-Based Eutectogel with Excellent Self-Healing Ability and Environmental Adaptability: Design, Synthesis, and Sensing Application. Chem Asian J 2024:e202400055. [PMID: 38545629 DOI: 10.1002/asia.202400055] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2024] [Revised: 03/06/2024] [Indexed: 05/08/2024]
Abstract
A superelastic self-healing eutectogel was designed and prepared using poly (vinyl alcohol) (PVA) as the bulk skeleton material, while silk fibroin (SF) and two-dimensional (2D) MXene (Ti3C2TX) as reinforcing fillers. In brief, the eutectogel possesses a high tensile strength of 7.63 MPa, and its elongation at break reached 1115.2%, higher than most reported polymers (<1000%). In addition, the eutectogel-assembled sensor has a high ionic conductivity of 0.61 S/m and a high strain sensitivity of 5.17 kPa-1. Moreover, eutectogel shows excellent self-healing ability and can achieve self-healing quickly within 10 min, while its tensile strength and elongation at break can be restored to 84.7% and 97.4% of the initial levels. Besides, a stable electrical signal can be transmitted after 200 cycles at 30% strain. Finally, the eutectogel can withstand various environmental conditions, such as atmospheric or even vacuum evaporation and low-temperature freezing, while maintaining good mechanical and sensing performances. The assembled flexible sensors based on the eutectogel demonstrate their significant application prospects in wearable devices, especially human physiological monitoring.
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Affiliation(s)
- Hanlin Zhai
- State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, 730000, China
- School of Chemical Engineering, Northwest Minzu University, Lanzhou, 730070, China
| | - Chen Yue
- State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, 730000, China
- School of Chemical Engineering, Northwest Minzu University, Lanzhou, 730070, China
| | - Zhangpeng Li
- State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, 730000, China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Limin Ma
- State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, 730000, China
| | - Tingting Wang
- School of Chemical Engineering, Northwest Minzu University, Lanzhou, 730070, China
| | - Hong Zhang
- School of Chemical Engineering, Northwest Minzu University, Lanzhou, 730070, China
| | - Jinqing Wang
- State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, 730000, China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Shengrong Yang
- State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, 730000, China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049, China
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Niu LM, Liu G, Li Y, Zhang R, Wu XQ, Liu YY. [Analysis of whole blood cells and genetic influencing factors in medical radiation workers]. Zhonghua Lao Dong Wei Sheng Zhi Ye Bing Za Zhi 2023; 41:827-831. [PMID: 37935548 DOI: 10.3760/cma.j.cn121094-20220616-00324] [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] [Grants] [Subscribe] [Scholar Register] [Indexed: 11/09/2023]
Abstract
Objective: To explore the influencing factors of whole blood cells and genetics of medical radiation workers, and provide technical support for improving occupational health management and strengthening radiation protection. Methods: In January 2022, a total of 4180 medical radiation workers who underwent occupational health examination in Gansu Provincial Center for Disease Control and Prevention from January 2020 to December 2021 were collected as the research objects, and the results of demographic characteristics, whole blood cells, chromosome aberrations, lymphocyte micronucleus and other results were collected. The whole blood cells and genetic abnormalities of different demographic characteristics of medical radiation workers were compared. And the influencing factors of whole blood cells and genetic abnormalities were analyzed by multivariate logistic regression. Results: The rates of hemoglobin (HGB), chromosome aberration and lymphocyte micronucleus abnormality were the highest in the nuclear medicine group, and the rate of white blood cell (WBC) abnormality in the radiotherapy group was higher than those in other occupational groups, the differences were statistically significant (P<0.05). The abnormal rates of WBC, HGB and lymphocyte micronucleus in female radiation workers were significantly higher than those in male radiation workers (P<0.001). The abnormal rates of HGB and lymphocyte micronucleus were statistically different among different working years and different age radiation workers (P<0.001). And the abnormal rate of platelet (PLT) was statistically different among different working years radiation workers (P<0.05). The abnormal rate of HGB in radiation workers of different hospital levels was statistically different (P<0.001). Logistic regression analysis showed that the risk of abnormal WBC and HGB in females radiation workers were 3.048 times and 13.122 times of those in males, respectively (P<0.001). The abnormal risks of WBC in the 6-20 working years group and >20 working years group were 1.517 times and 1.874 times of that in the ≤5 working years group, respectively (P<0.05). The abnormal risk of PLT in the >20 working years group was 2.643 times of that in ≤5 working years group (P<0.05). The abnormal risk of WBC in radiotherapy group and intervention group were 2.407 times and 1.341 times of that in general radiotherapy group, respectively (P<0.05) . Conclusion: Ionizing radiation has different effects on the whole blood cells and genetic indexes of workers in the nuclear medicine, interventional group and radiotherapy group. The occupational health protection of female radiation workers should be paid attention to.
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Affiliation(s)
- L M Niu
- Department of Radiation Medicine, Gansu Province Center for Disease Control and Prevention, Lanzhou 730000, China
| | - G Liu
- Department of Radiation Medicine, Gansu Province Center for Disease Control and Prevention, Lanzhou 730000, China
| | - Y Li
- Department of Radiation Medicine, Gansu Province Center for Disease Control and Prevention, Lanzhou 730000, China
| | - R Zhang
- Department of Radiation Medicine, Gansu Province Center for Disease Control and Prevention, Lanzhou 730000, China
| | - X Q Wu
- Department of Radiation Medicine, Gansu Province Center for Disease Control and Prevention, Lanzhou 730000, China
| | - Y Y Liu
- Department of Radiation Medicine, Gansu Province Center for Disease Control and Prevention, Lanzhou 730000, China
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Ba Z, Wang Y. Optimal heat emissivity control of n population system based on individual size-distribution. Sci Rep 2023; 13:17766. [PMID: 37853000 PMCID: PMC10584966 DOI: 10.1038/s41598-023-42648-3] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2023] [Accepted: 09/13/2023] [Indexed: 10/20/2023] Open
Abstract
This paper generalizes a class of controllability problems based on the scale structure population system model. Based on the comparison principle of linear systems, the solution of the nonlinear system model is obtained by referring to the fixed point theorem. The non-negative, boundedness, existence, and uniqueness of the solution of the system model are established. The optimality condition is described in detail by means of a normal cone and conjugate system under the condition of proving the continuous dependence of the state environment on the solution to control variables.
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Affiliation(s)
- Zhenggang Ba
- School of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou, 730070, China
| | - Ye Wang
- School of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou, 730070, China.
- Key Laboratory of Railway Vehicle Thermal Engineering, Ministry of Education of China, Lanzhou, 730070, China.
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Yang X, Li L, Zhao W, Li X, Mu Y, Chen M, Wu X. Substitute for polyethylene (PE) films: A novel cow dung-based liquid mulch on silage cornfields. PLoS One 2022; 17:e0271273. [PMID: 35830433 PMCID: PMC9278788 DOI: 10.1371/journal.pone.0271273] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2021] [Accepted: 06/28/2022] [Indexed: 12/02/2022] Open
Abstract
To prevent soil pollution caused by polyethylene (PE) films in the central region of Gansu, China, liquid mulching made from cow dung (CDLM) was trailed in silage maize fields. The degradation of CDLM and PE films, soil temperature, soil organic matter content, silage maize yield and water use efficiency (WUE) were evaluated for three years (2018–2020). The degradability of CDLM has been found to be much stronger than the one of PE films, with CDLM degrading 40–60 days after sowing and finishing around 100 days. CDLM had a lower insulating impact than PE films but a higher insulating effect than non-mulching films as the control (CK); CDLM could successfully increase soil organic matter, with a total increase of 1.01% over three years. CDLM increased silage maize yield by 6.2% compared to PE films and 17.2% compared to CK. Consequently, CDLM may be an interesting alternative to PE films for enhancing silage maize yield while decreasing soil contamination.
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Affiliation(s)
- Xiangjun Yang
- Faculty of Mechanical and Electrical Engineering, Gansu Agricultural University, Lanzhou, China
- Faculty of Mechanical Engineering, Chengdu University, Chengdu, China
| | - Lu Li
- Faculty of Mechanical and Electrical Engineering, Gansu Agricultural University, Lanzhou, China
| | - Wuyun Zhao
- Faculty of Mechanical and Electrical Engineering, Gansu Agricultural University, Lanzhou, China
- * E-mail:
| | - Xuan Li
- Faculty of Water Conservancy and Hydropower Engineering, Gansu Agricultural University, Lanzhou, China
| | | | - Maohan Chen
- Faculty of Mechanical Engineering, Chengdu University, Chengdu, China
| | - Xiaoqiang Wu
- Faculty of Mechanical Engineering, Chengdu University, Chengdu, China
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