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SSRN 2023年

作者： Fu, Lei Lin, Li Yan, Shisen Luo, Yunrong Zhang, Yingqian Lai, Sheng Wang, Zhengguo Tan, Mingxing School of Mechanical Engineering Sichuan University of Science & Engineering Zigong643000 China Failure Mechanics and Engineering Disaster Prevention Key Lab of Sichuan Province Sichuan University Chengdu610065 China Key Laboratory of Deep Earth Science and Engineering Sichuan University Ministry of Education Chengdu610065 China School of Material Science and Engineering Sichuan University of Science & Engineering Zigong643000 China Vanadium and Titanium Resource Comprehensive Utilization Key Laboratory of Sichuan Province Panzhihua617000 China Sichuan Provincial Key Lab of Process Equipment and Control Zigong643000 China School of Civil Engineering Sichuan University of Science & Engineering Zigong643000 China

Sulfate reducing bacteria (SRB) are facultative anaerobic, and the electron transfer process of their growth and metabolic activities is as follows: the electrons released from the metal surface pass through the cell wall into the cell by extracellular electron transfer, and the electron shuttle to the body plays the role of electron transfer between cells and metals. In this study, the effect of riboflavin (RF) as an electron shuttle on SRB corrosion of X80 pipeline steel was analyzed. The results showed that the addition of 10 ppm RF to the SRB medium did not significantly change the type of corrosion products, but resulted in an enlarged corrosion pit area and an increased pit depth. The corrosion weight loss rate of the SRB + 10 ppm RF system is about 3 times that of the SRB system, and the corrosion current density of the polarization curve is about 38% higher than that of the SRB system. Therefore, RF can transfer the electrons released by iron oxidation to the cytoplasm by means of electron transfer across the cell wall, thereby accelerating the corrosion of X80 steel. This further proves that the electronic medium RF can accelerate the microbial influenced corrosion (MIC) caused by SRB. © 2023, The Authors. All rights reserved.

关键词： Electron transport properties

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Study on Microstructure Evolution Mechanism of Gradient Structure Surface of Aa7075 Aluminum Alloy by Ultrasonic Surface Rolling Treatment

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SSRN 2022年

作者： Fu, Lei Li, Xiulan Lin, Li Wang, Zhengguo Zhang, Yingqian Luo, Yunrong Yan, Shisen He, Chao Wang, Qingyuan School of Mechanical Engineering Sichuan University of Science & Engineering Zigong643000 China Failure Mechanics and Engineering Disaster Prevention Key Lab of Sichuan Province Sichuan University Chengdu610065 China School of Aeronautics and Astronautics Sichuan University Chengdu610065 China School of Material Science and Engineering Sichuan University of Science & Engineering Zigong643000 China Sichuan Provincial Key Lab of Process Equipment and Control Zigong643000 China School of Civil Engineering Sichuan University of Science & Engineering Zigong643000 China Institute for Advanced Materials Deformation and Damage from Multi-Scale China

The ultrasonic surface rolling treatment (USRT) was used to prepare aluminum alloy 7075 (AA7075) samples with a surface gradient structure. Microstructural evolution mechanism of the deformation layers on the gradient structure was studied by XRD, SEM, and TEM. The results show that the dislocation slip dominates the grain refinement process, and it follows the continuous cutting and refinement of dislocation cells, subgrains, and fragmentation of the second precipitates. The grain refinement on the surface layer of samples with gradient structure provides a theoretical foundation for the surface grain refinement and nanocrystallization of precipitation-strengthened aluminum alloy. © 2022, The Authors. All rights reserved.

关键词： Grain refinement

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Anaerobic Granular Sludge in Pilot Spiral Symmetry Stream Anaerobic Bioreactor: Its Physical and Chemical Properties Change Over Time and Space

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SSRN 2023年

作者： Ren, Luotong Li, Gongsong Dong, Bin Wang, Zhenxi Xu, Sheng Chen, Siyu Danping, Huang Chen, Xiaoguang Shanghai Frontier Science Research Center for Modern Textiles College of Environmental Science and Engineering Donghua University Shanghai201620 China College of Environmental Science and Engineering Tongji University Shanghai200092 China College of Sciences Nanchang Institute of Technology Nanchang330099 China Sichuan Provincial Key Lab of Process Equipment and Control School of Mechanical Engineering Sichuan University of Science & Engineering Zigong643000 China

Anaerobic granular sludge determines the high performance of the bioreactor. Numerous factors can affect the activity of microorganisms in granular sludge. To study the regionalization of granular sludge in the bioreactor, we established a pilot Spiral Symmetry Stream Anaerobic Bioreactor (P-SSSAB) over 216 days, divided into three zones (I, II, and III) from bottom to top. The temperature is the major factor affecting microbial activity. The monitoring of bed temperature in various zones during 216 days revealed that the microbial activity in I was times and times that in II and III, respectively. The sludge at the bottom of the P-SSSAB had a higher porosity (60.35% ~ 83.27%) and more suitable settling velocity (60 m/h) when the particle size range was in 1.0 to 2.0 mm. This proves the better metabolic activity and more superior settling performance in I than in II and III. In addition, the elemental composition of the granular sludge in various zones were analyzed. The relative content of Fe (5.66%, 3.36%, and 1.38%, respectively) and S (2.47%, 2.19%, and 1.49%, respectively) in I, II, and III tended to decrease with the rising of the P-SSSAB. This also verifies the better mass transfer performance and operational stability at the bottom of the reactor than in the upper layer. © 2023, The Authors. All rights reserved.

关键词： Bioreactors

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Preparation and Physical Properties of Polyethylene/Carbon Nanotubes/Nanosilver Composite

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IOP Conference Series: Materials Science and engineering 2020年第1期774卷

作者： Feifan Ge Wei-Hua Yao Xu Lin Jui-Chin-Chen Lin Jiang Chi-Hui Tsou Material Corrosion and Protection Key Laboratory of Sichuan Province Sichuan Provincial Key Laboratory of Process Equipment and Control College of Materials Science and Engineering Sichuan University of Science and Engineering Zigong 643000 China Department of Materials and Textiles Oriental Institute of Technology New Taipei City 22061 Taiwan ROC Zigong Fourth People's Hospital Zigong 643000 China Sichuan zhirenfa Environmental Protection Technology Co. Ltd 64300 China Sichuan Zhixiangyi Technology Co. Ltd. Chengdu 610051 China

In this paper, nanosilver and carbon nanotubes was melt blended with HDPE and pet respectively to prepare HDPE/CNT/nanosilver and PET/CNT/nanosilver composites with antibacterial effect. After the preparation of samples, SEM, DSC, TGA, mechanical properties and antibacterial properties were tested. The possibility of preparing new materials by this method is studied. Compared with pure HDPE, when the content of CNT/nanosilver is 0.1 phr, the tensile strength of HDPE/CNT/nanosilver composite reach to the max value.

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The 5th International Conference on Biomedical engineering and Biotechnology (ICBEB 2016) Abstracts

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BMC MEDICAL IMAGING 2016年第SUPPL 1期16卷 65-65页

作者： [Anonymous] Department of MRI Shandong Medical Imaging Research Institute Affiliated to Shandong University Jinan Shandong 250021 People’s Republic of China Department of Interventional Radiology Shandong Provincial Hospital Affiliated to Shandong University Jinan Shandong 250021 People’s Republic of China College of Information Science and Technology Engr. Research Center of Digitized Textile & Fashion Tech. for Ministry of Education Donghua University Shanghai 201620 China Intelligent multimedia information processing Lab College of Software Northeastern University Shenyang Liaoning Province 110004 China Institute of Biomedical and Health Engineering Shenzhen Institutes of Advanced Technology Chinese Academy of Sciences Shenzhen 518055 China School of Computer Science and Technology Nanjing Normal University Nanjing China Department of Electrical Engineering The City College of New York CUNY New York USA Jiangsu Key Laboratory of 3D Printing Equipment and Manufacturing Nanjing China School of Electronic Science and Engineering Nanjing University Nanjing Jiangsu 210046 China College of Engineering Nanyang Technological University Singapore 639798 Singapore School of Electronic Information Shanghai Dianji University Shanghai China School of Natural Sciences and Mathematics Shepherd University Shepherdstown WV 25443 USA Davis College of Agriculture Natural Resources and Design West Virginia University Morgantown WV 26505 USA State Key Laboratory of Millimeter Waves Southeast University Nanjing 210096 China Center of Medical Physics and Technology Hefei Institutes of Physical Science Chinese Academy of Sciences Hefei China College of Agricultural and Life Sciences University of Florida Gainesville FL 32611 USA Courant Institute of Mathematical Sciences New York University New York NY 10012 USA Translational Imaging Division & MRI Unit Columbia University and New York State Psychiatric Institute New York NY 10032 USA Guangxi Key Laboratory of Manufacturing System & Adv

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