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Copyright of Journal of Food Safety & Quality is the property of Journal of Food Safety & Quality 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.)

The dental mesenchymal stem cells (DMSCs) are mesenchymal stem cells derived from the neural crest ectoderm and have exceptional self-renewal and multilineage differentiation capabilities. The DMSCs are extensively used in tissue engineering and regenerative medicine research. The DMSCs can be expanded in vitro on a large scale to meet the needs of research and therapy by three-dimensional culture technique. Compared with traditional two-dimensional cell culture techniques, three-dimensional culture more effectively simulates the structure and microenvironment that the stem cells encounter in vivo, providing simultaneous spatial and temporal regulation of the proliferation and differentiation of the stem cells. Various three-dimensional in vitro culture techniques have been developed in recent years. Hanging drop culture is straightforward, but controlling the tissue culture environment is challenging; microfluidic chips offer better control over cellular parameters, but are costly and face the technical platform challenges, so their widespread application is limited; magnetic levitation culture is cost-effective and easy to perform with the rapid cell spheroid formation, but its magnetization effect make it unsuitable for the quantitative analysis. Other three-dimensional culture methods include rotating cell culture systems, centrifugation for spheroid culture, overlay culture and artificial scaffold methods, and they all have their own advantages and limitations. This review encompasses the different methods of three-dimensional culturing of DMSCs and their applications in various tissue regeneration and disease treatment, and provide the reference for the precise regulation of the function of the DMSCs and the research of regenerative medicine. [ABSTRACT FROM AUTHOR]

Copyright of Computer Measurement & Control is the property of Magazine Agency of Computer Measurement & 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 Telecommunications Science is the property of Beijing Xintong Media 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 Journal of Data Acquisition & Processing / Shu Ju Cai Ji Yu Chu Li is the property of Editorial Department of Journal of Nanjing University of Aeronautics & Astronautics 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 leaching solution of gold tailings contains much ammonia nitrogen and is difficult to treat. In the test, the sodium hypochlorite oxidation method has been applied to the treatment of certain gold tailings leaching solutions. The effects of pH, reaction time, and dosage of NaClO solution on the removal of NH4-N and COD have been investigated. The results show that the NaClO dosage has the greatest effect on the NH4-N and COD removal rate. Under the optimal treatment conditions: pH of 6. 00, the reaction time of 10 min, and NaClO dosage of 80 mL/L, the removal rates of NH4-N and COD are 99. 3 % and 87. 5 % respectively. [ABSTRACT FROM AUTHOR]

Copyright of Mining & Metallurgy (10057854) is the property of Beijing Research Institute of Mining & Metallurgy Technology Group 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.)