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BACKGROUND: Cerium (Ce) is the most abundant element among lanthanides, which is mostly in the form of ceria. The reversible transformation between Ce3+ and Ce4+ ions contributes to the high redox activity of cerium. Because of its antibacterial, anti-inflammatory, osteogenic, angiogenic and anti-tumor properties, cerium has been widely used in stomatology. OBJECTIVE: To summarize the antibacterial, anti-inflammatory, osteogenic, angiogenic and anti-tumor mechanism of cerium, and to review the research status and application prospects of cerium and cerium-based materials in the modification of oral materials and the diagnosis and treatment of oral diseases in recent years. METHODS: The articles published from database inception to 2023 were retrieved from Web of Science, PubMed, CNKI and WanFang databases with the search terms “cerium, ceria, prosthodontics, prosthesis, restorative dentistry, denture, dental implant, caries, endodontics, pulpitis, periodontitis, periodontal diseases, oral cancer” in English and “cerium, ceria, prosthodontics, implant, dental caries, dental pulp, periodontitis, periodontal disease, oral cancer” in Chinese. By analyzing and reading literature for screening, according to the inclusion and exclusion criteria, 73 articles were finally included in this review. RESULTS AND CONCLUSION: (1) Cerium exerts an antibacterial effect through direct contact with bacteria, oxidative stress and destroying bacterial biofilm, and exerts an anti-inflammatory function based on mimetic enzyme activity. The osteogenic and angiogenic activities of cerium involve a series of signaling pathways including ERK and Wnt signaling pathways. (2) Antibacterial, anti-inflammatory, osteogenic, and angiogenic activities allow cerium significant potential in the treatment of oral infectious diseases and regeneration of oral soft and hard tissues. However, there is still a certain gap in the application of cerium’s anti-tumor properties in the oral field. (3) Due to excellent mechanical properties and a low light-transmitting property, ceria-stabilized zirconia as a dental ceramic material can be used for core ceramics, the frameworks of dental prostheses and dental implants. (4) Benefited from its biological properties, cerium-based materials have the ability to promote osseointegration and soft tissue integration, inhibit demineralization and cariogenic bacteria, facilitate regeneration of the dentin-pulp complex, lessen inflammatory response and enhance periodontal tissue regeneration. There are wide applications of cerium in surface modifications of implants and treatments of caries, pulpitis, periodontitis and oral cancers. (5) Cerium shows certain toxicity under conditions of high concentration and long-term administration. To further expand clinical applications of cerium in dentistry, biosafety and optimization of cerium-based materials need to be further explored in the future. [ABSTRACT FROM AUTHOR]

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本文从实验的角度研究了多模光纤微弯和曲弯损耗与光纤参数的关系。以实验数据检验了前人所作的理论研究,并确立了以实验为基础的微弯和弯曲损耗的计算公式。

Copyright of Taiwan Law Review is the property of Angle Publishing Co., Ltd and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Acta Agronomica Sinica is the property of Crop Science Society of China and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Acta Materiae Compositae Sinica is the property of Acta Materiea Compositae Sinica Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Beijing University of Traditional Chinese Medicine is the property of Journal of Beijing University of Traditional Chinese Medicine and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

During the construction of the deep drainage project for the new works for Shenhua Luoyuan Bay Power Plant in Fujian Province, the construction of offshore cast-in-place piles was seriously impacted due to the bad geological conditions as the construction area was located in the riprapped slope of the jetty, easily causing the slipping of the slope. The boreholes for cast -in -place pile construction cannot be made with the conventional method. The paper describes how the construction of cast -in -place piles on the riprapped slope was completed by using the double casing technology and presents effective measures to control the slipping of the casing and the leakage of slurry during boreholing. [ABSTRACT FROM AUTHOR]

BACKGROUND: Mesenchymal stem cells, with self-replication and multidirectional differentiation potential, attracted much attention in the field of bone tissue regeneration. As a non-invasive physical stimulation factor, the magnetic field can effectively regulate the biological behaviors of mesenchymal stem cells such as adhesion, proliferation, osteogenic differentiation and mineralization, which means that it has a broad application prospect in bone tissue regeneration medicine. The effect of the magnetic field depends on parameters such as magnetic field strength, frequency and exposure time. Due to the window effect, the appropriate parameter range of magnetic field promoting bone regeneration remains to be clarified. OBJECTIVE: To review the effects of different magnetic fields and different magnetic parameters on osteogenic differentiation of mesenchymal stem cells as well as the possible mechanisms, and to summarize the appropriate parameters for promoting proliferation and osteogenic differentiation. METHODS: Databases of CNKI and PubMed were searched for relevant articles published from January 2010 to September 2021 using the keywords including “magnetic field, static magnetic field, pulsed electromagnetic field, mesenchymal stem cells, proliferation, osteogenic differentiation, bone regeneration, bone repair” in Chinese and English. A few classic early articles were also included. By reading the titles and abstracts, a preliminary screening was conducted. Repetitive studies, low-quality or irrelevant articles were excluded. Finally, a total of 56 articles were retained and analyzed for this review. RESULTS AND CONCLUSION: (1) Moderate static magnetic field, low frequency or low intensity pulsed electromagnetic field, have positive effects on the proliferation and osteogenic differentiation of mesenchymal stem cells. High-frequency pulsed electromagnetic field produces obvious inhibitory effect. (2) The magnetic field modulation effect was positively correlated with the total exposure time, but its effect did not increase with the time of single intermittent exposure. (3) Factors outside the magnetic field, such as stem cell type, differentiation stage, and cell density, also have complex effects on the biological effects of the magnetic field, which should be paid attention to in clinic. (4) Magnetic fields have effects on cellular targets such as plasma membrane, cytoskeleton and ion channel. The possible mechanisms mainly include magnetomechanical interaction, electrodynamic interaction and free radical effect. [ABSTRACT FROM AUTHOR]

Copyright of Chinese Journal of Aesthetic & Plastic Surgery is the property of Chinese Journal of Aesthetic & Plastic Surgery Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Angle Health Law Review is the property of Angle Publishing Co., Ltd. and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Science Technology & Engineering is the property of Chinese Society of Technology Economics and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Chinese Journal of Cancer Biotherapy is the property of Editorial Office of Chinese Journal of Cancer Biotherapy and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Special Oil & Gas Reservoirs is the property of Special Oil & Gas Reservoirs Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The concrete construction of steel tube column in the 3rd tower of CCCC Huitong Hengqin Square is one of the key and difficult points of this project. The maximum section of steel column is ∅2 800 mmx70 mm, and the highest pumping height is 309.4 m. Through the research on the selection of concrete raw materials, mixture ratio design, performance test of concrete mixture, comparison and selection of construction methods, and establishment of pumping technology, six groups of concrete mix proportion meeting the requirements of the specification were designed. The feasibility of designing concrete mixture ratio was verified by the test and detection of the concrete quality of steel tube column. In the research process, it is considered to avoid the cracking of mass concrete, and the requirements of ultra -high pumping on concrete. The research on steel tube column concrete construction technology can provide reference for similar projects in the future. [ABSTRACT FROM AUTHOR]

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Copyright of Electric Machines & Control / Dianji Yu Kongzhi Xuebao is the property of Electric Machines & Control and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Architecture & Civil Engineering is the property of Chang'an Daxue Zazhishe and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Engineering Geology / Gongcheng Dizhi Xuebao is the property of Journal of Engineering Geology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

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Copyright of Coal Science & Technology (0253-2336) is the property of Coal Science & Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Shandong Medical Journal is the property of Shandong Medical Health Newspapers and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Practical Pharmacy & Clinical Remedies is the property of Editorial Department of Practical Pharmacy & Clinical Remedies and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Coal Science & Technology (0253-2336) is the property of Coal Science & Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Practical Pharmacy & Clinical Remedies is the property of Editorial Department of Practical Pharmacy & Clinical Remedies and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Harbin Institute of Technology. Social Sciences Edition / Haerbin Gongye Daxue Xuebao. Shehui Kexue Ban is the property of Harbin Institute of Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Research & Exploration in Laboratory is the property of Research & Exploration in Laboratory and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Coal Science & Technology (0253-2336) is the property of Coal Science & Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Overwork has caused strokes or death for many physicians, and is currently a widespread social controversy. The protection of working rights of physicians is an issue that cannot be neglected. The Labor Standards Act (the Act) was enacted to provide minimum standards for working conditions. Employed physicians hope to get this long-awaited protection. Problems occurred when the Act was applied to to other businesses. From the perspective of social justice, however, will having physicians covered by the Act protect public health and prevent impairment? Other medical staff are covered by the the Act, as are accountants and lawyers who have similar long working hours, so should physicians not also be covered by the Act? In the end, what problems and their solutions may we encounter when physicians are included under the Act? This article will analyze the issue in terms of the protection of labor rights by the Act, and from the observation of the application process to accountants and lawyers; finally, we propose a way for physicians to be covered by the Act along with necessary supporting measures. [ABSTRACT FROM AUTHOR]