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Ji Y, Ma X, Zheng H, Huang K, Wang S, Zhang D. Detection method for contact stress distribution of tapered roller bearings. Sci Rep 2024; 14:10472. [PMID: 38714809 PMCID: PMC11076488 DOI: 10.1038/s41598-024-61383-x] [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: 02/21/2024] [Accepted: 05/06/2024] [Indexed: 05/10/2024] Open
Abstract
The axle box of high-speed train adopts double row tapered roller bearings as transmission parts, and the reliability of bearings directly affects the safety of train operation. Tapered roller bearings can withstand axial and radial loads, their service life being closely related to the distribution of contact stress. The test object is the axle box bearing of high-speed train. According to bearing's structural characteristics, based on the digital speckle correlation method (DSCM) and machine vision, the contact stress distribution detection devices for rollers and complete sets of bearings are developed respectively and an effective detection method is proposed. The contact stress data of the bearing which has reached the service life and the new bearing under the condition of no lubrication and grease lubrication are collected and normalized. Through the geometric relationship, based on the measured data of the selected detection points, the normal and tangential contact stress distribution of the roller and raceway under different contact conditions is obtained by data fitting. The test can be used as an evaluation basis for the effectiveness of bearing modification and provide reference for bearing design.
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Affiliation(s)
- Ye Ji
- Luoyang Institute of Science and Technology, Luoyang, 471023, China.
- Luoyang Juchuang Bearing Technology Co., Ltd., Luoyang, 471003, China.
| | - Xinzhong Ma
- Luoyang Bearing Research Institute Co., Ltd., Luoyang, 471039, China
| | - Haotian Zheng
- Luoyang Bearing Research Institute Co., Ltd., Luoyang, 471039, China
| | - Kun Huang
- Luoyang Bearing Research Institute Co., Ltd., Luoyang, 471039, China
| | - Sheng Wang
- Shaanxi Business College, Xi'an, 710119, China
| | - Danwen Zhang
- Luoyang Institute of Science and Technology, Luoyang, 471023, China
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Gao E, Wang Y, Fan GL, Xu G, Wu ZY, Liu ZJ, Liu JC, Mao LF, Hou X, Li S. Discovery of gefitinib-1,2,3-triazole derivatives against lung cancer via inducing apoptosis and inhibiting the colony formation. Sci Rep 2024; 14:9223. [PMID: 38649732 PMCID: PMC11035632 DOI: 10.1038/s41598-024-60000-1] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2024] [Accepted: 04/17/2024] [Indexed: 04/25/2024] Open
Abstract
A series of 20 novel gefitinib derivatives incorporating the 1,2,3-triazole moiety were designed and synthesized. The synthesized compounds were evaluated for their potential anticancer activity against EGFR wild-type human non-small cell lung cancer cells (NCI-H1299, A549) and human lung adenocarcinoma cells (NCI-H1437) as non-small cell lung cancer. In comparison to gefitinib, Initial biological assessments revealed that several compounds exhibited potent anti-proliferative activity against these cancer cell lines. Notably, compounds 7a and 7j demonstrated the most pronounced effects, with an IC50 value of 3.94 ± 0.17 µmol L-1 (NCI-H1299), 3.16 ± 0.11 µmol L-1 (A549), and 1.83 ± 0.13 µmol L-1 (NCI-H1437) for 7a, and an IC50 value of 3.84 ± 0.22 µmol L-1 (NCI-H1299), 3.86 ± 0.38 µmol L-1 (A549), and 1.69 ± 0.25 µmol L-1 (NCI-H1437) for 7j. These two compounds could inhibit the colony formation and migration ability of H1299 cells, and induce apoptosis in H1299 cells. Acute toxicity experiments on mice demonstrated that compound 7a exhibited low toxicity in mice. Based on these results, it is proposed that 7a and 7j could potentially be developed as novel drugs for the treatment of lung cancer.
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Affiliation(s)
- En Gao
- School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, 453000, China.
- State Key Laboratory of Quality Research in Chinese Medicine/Macau Institute for Applied Research in Medicine and Health, Macau University of Science and Technology, Macau, China.
| | - Ya Wang
- School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, 453000, China
| | - Gao-Lu Fan
- Department of Pharmacy, Luoyang Third People' Hospital, Luoyang, 471000, China
| | - Guiqing Xu
- School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, 453000, China
| | - Zi-Yuan Wu
- College of Basic Medicine and Forensic Medicine, Henan University of Science and Technology, 263 Kaiyuan Road, Luoyang, 471003, China
| | - Zi-Jun Liu
- College of Basic Medicine and Forensic Medicine, Henan University of Science and Technology, 263 Kaiyuan Road, Luoyang, 471003, China
| | - Jian-Cheng Liu
- College of Basic Medicine and Forensic Medicine, Henan University of Science and Technology, 263 Kaiyuan Road, Luoyang, 471003, China
| | - Long-Fei Mao
- College of Basic Medicine and Forensic Medicine, Henan University of Science and Technology, 263 Kaiyuan Road, Luoyang, 471003, China.
| | - Xixi Hou
- Department of Pharmacy, The First Affiliated Hospital, College of Clinical Medicine of Henan University of Science and Technology, Luoyang, 471003, China
| | - Shouhu Li
- School of Pharmacy, Xinxiang University, Xinxiang, 453000, Henan, China
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