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Seismogenic Tectonics and Dynamics of the 2011 Ms5.9 Yingjiang Earthquake in Yunnan, China

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Acta Geologica Sinica(English Edition) 2014年第2期88卷 468-482页

作者： sun yao AN Meijian FENG Mei LONG Changxing YANG Zhenyu Institute of Geomechanics Chinese Academy of Geological Sciences

In the southern South-North Seismic Zone,China,seismic activity in the Yingjiang area of western Yunnan increased from December 2010,and eventually a destructive earthquake of Ms5.9 occurred near Yingjiang town on 10 March *** focal mechanism and hypocenter location of the mainshock suggest that the Dayingjiang Fault was the site of the mainshock ***,most of foreshocks and all aftershocks recorded by a portable seismic array located close to the mainshock occurred along the N-S-striking Sudian Fault,indicating that this fault had an important influence on these *** stress calculations show that three strong （magnitude ≥5.0） earthquakes that occurred in the study region in 2008 increased the coulomb stress along the plane parallel to the Dayingjiang *** supports the Dayingjiang Fault,and not the Sudian Fault,as the seismogenic fault of the 2011 Ms5.9 Yingjiang *** strong earthquakes in 2008 also increased the Coulomb stress at depths of ≤5 km along the entire Sudian Fault,and by doing so increased the shallow seismic activity along the *** explains why the foreshocks and aftershocks of the 2011 Yingjiang earthquake were located mostly on the Sudian Fault where it cuts the shallow *** earthquakes at the intersection of the Sudian and Dayingjiang faults are distributed mainly along a belt that dips to the southeast at ～40°,suggesting that the Dayingjiang Fault in the mainshock area also dips to the southeast at ～40°.

关键词： Yingjiang earthquake Dayingjiang fault Sudian fault earthquake triggering Yunnan

Research on the nanometric machining of a single crystal nickel via molecular dynamics simulation

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Science China(Technological Sciences) 2016年第12期59卷 1837-1846页

作者： GONG Ya Dong ZHU Zong Xiao ZHOU Yun Guang sun yao School of Mechanical Engineering & Automation Northeastern University

Molecular dynamics simulations are employed to study the nanometric machining process of single crystal nickel. Atoms from different machining zones had different atomic crystal structures owing to the differences in the actions of the cutting tool. The stacking fault tetrahedral was formed by a series of dislocation reactions, and it maintained the stable structure after the dislocation reactions. In addition, evidence of crystal transition and recovery was found by analyzing the number variations in different types of atoms in the primary shear zone, amorphous region, and crystalline region. The effects of machining speed on the cutting force, chip and subsurface defects, and temperature of the contact zone between the tool and workpiece were investigated. The results suggest that higher the machining speed, larger is the cutting force. The degree of amorphousness of chip atoms and the depth and extent of subsurface defects increase with the machining speed. The average friction coefficient first decreases and then increases with the machining speed because of the temperature difference between the chip and machining surface.

关键词： molecular dynamics simulation nanometric machining single crystal nickel crystal transition and recovery machining speed

PRX1-positive mesenchymal stem cells drive molar morphogenesis

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International Journal of Oral Science 2024年第2期16卷 293-305页

作者： Xiaoqiao Xu Xuyan Gong Lei Zhang Han Zhang yao sun Department of Implantology Stomatological Hospital and Dental School of Tongji UniversityShanghai Engineering Research Center of Tooth Restoration and RegenerationShanghaiChina

Mammalian teeth,developing inseparable from epithelial-mesenchymal interaction,come in many shapes and the key factors governing tooth morphology deserve to be *** merging single-cell RNA sequencing analysis with lineage tracing models,we have unearthed a captivating correlation between the contrasting morphology of mouse molars and the specific presence of PRX1^(+)cells within *** PRX1^(+)cells assume a profound responsibility in shaping tooth morphology through a remarkable divergence in dental mesenchymal cell *** into the mechanisms,we have discovered that Wnt5a,bestowed by mesenchymal PRX1^(+)cells,stimulates mesenchymal cell proliferation while orchestrating molar morphogenesis through WNT signaling *** loss of Wnt5a exhibits a defect phenotype similar to that of *** addition of WNT5A can successfully reverse the inhibited cell proliferation and consequent deviant appearance exhibited in Prx1-deficient tooth *** findings bestow compelling evidence of PRX1-positive mesenchymal cells to be potential target in regulating tooth morphology.

关键词： Wnt5a mesenchymal inhibited

Tooth number abnormality:from bench to bedside

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International Journal of Oral Science 2023年第1期15卷 1-15页

作者： Han Zhang Xuyan Gong Xiaoqiao Xu Xiaogang Wang yao sun Department of Implantology Stomatological Hospital and Dental School of Tongji UniversityShanghai Engineering Research Center of Tooth Restoration and RegenerationShanghaiChina Key Laboratory of Big Data-Based Precision Medicine School of Engineering MedicineBeihang UniversityBeijingChina

Tooth number abnormality is one of the most common dental developmental diseases,which includes both tooth agenesis and supernumerary *** development is regulated by numerous developmental signals,such as the well-known Wnt,BMP,FGF,Shh and Eda pathways,which mediate the ongoing complex interactions between epithelium and *** expression of these crutial signalling during this process may eventually lead to the development of anomalies in tooth number;however,the underlying mechanisms remain *** this review,we summarized the major process of tooth development,the latest progress of mechanism studies and newly reported clinical investigations of tooth number *** addition,potential treatment approaches for tooth number abnormality based on developmental biology are also *** review not only provides a reference for the diagnosis and treatment of tooth number abnormality in clinical practice but also facilitates the translation of basic research to the clinical application.

关键词： abnormality diagnosis epithelium

Integrated bioremediation techniques in a shrimp farming environment under controlled conditions

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Acta Oceanologica Sinica 2016年第2期35卷 88-94页

作者： SONG Xianli YANG Qian REN J.Shengmin sun yao WANG Xiulin sun Fuxin College of Chemistry and Chemical Engineering Ocean University of China Qingdao 266003 China Yellow Sea Fisheries Research Institute Chinese Academy of Fishery Science Qingdao 266071 China Marine Biology Institute of Shandong Province Qingdao 266104 China National Institute of Water and Atmospheric Research Christchurch 8440 New Zealand

This study investigated the integrated bioremediation techniques for a shrimp culture system to reduce unconsumed feed and the contents of suspended solids（SS）, nutrients and organic pollutants using barracuda,clamworm, scallop, large algae and a biofilter. A multi-pool internal circulation system was designed to test the effectiveness of the techniques in the laboratory. The experimental result has shown that Argopecten irradians,Gracilaria lemaneiformis and the biofilter efficiently reduced the contents of SS, dissolved inorganic carbon（DIC）and dissolved organic carbon（DOC） in the breeding wastewater. The amount of unconsumed feed was significantly reduced by barracuda and clamworm, but there was an increase in the contents of SS, DIC and DOC in the water due to disturbance by the barracuda and clamworm. The capacity of macroalgae to extract inorganic nitrogen was insufficient. However, the balance of the nitrogen fixation rate of macroalgae and the biological exhaust nitrogen rate within the system should be fully considered. The use of the biofilter alone was not optimal for the remediation of organic matter in shrimp effluent so that auxiliary foam separation technology is needed to improve the ability of the system to remove macromolecules. This study provides a basis for the further development of remediation techniques to reduce the environmental impact of shrimp aquaculture.

关键词： shrimp aquaculture environment bioremediators integrated remediation technique

Last 150-Year Variability in Japanese Anchovy (Engraulisjaponicus) Abundance Based on the Anaerobic Sediments of the Yellow Sea Basin in the Western North Pacific

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Journal of Ocean University of China 2016年第1期15卷 131-136页

作者： HUANG Jiansheng sun yao JIA Haibo TANG Qisheng College of Ocean and Earth Sciences Xiamen University Xiamen 361005 P. R. China Yellow Sea Fisheries Research Institute Chinese Academy of Fishery Sciences Qingdao 266071 P. R. China

Relatively short historical catch records show that anchovy populations have exhibited large variability over multi-decadal *** order to understand the driving factors(anthropogenic and/or natural) of such variability,it is essential to develop long-term time series of the population prior to the occurrence of notable anthropogenic ***-preserved fish scales in the sediments are regarded as useful indicators reflecting the fluctuations of fish populations over the last *** study aims to validate the anchovy scale deposition rate as a proxy of local anchovy biomass in the Yellow Sea adjoining the western North *** reconstructed results indicated that over the last 150 years,the population size of anchovy in the Yellow Sea has exhibited great fluctuations with periodicity of around 50 years,and the pattern of current recovery and collapse is similar to that of historical *** pattern of large-scale population synchrony with remote ocean basins provides further evidence proving that fish population dynamics are strongly affected by global and basin-scale oceanic/climatic variability.

关键词： fish scales record anchovy the central South Yellow Sea population dynamic

Recent advances on small-molecule fluorophores with emission beyond 1000 nm for better molecular imaging in vivo

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Chinese Chemical Letters 2019年第10期30卷 1731-1737页

作者： Le Tu Yuling Xu Qingying Ouyang Xiangyang Li yao sun College of Chemistry China University of PetroleumQingdao 266555China International Joint Research Center for Intelligent Biosensor Technology and Health Key Laboratory of Pesticides and Chemical BiologyMinistry of EducationCollege of ChemistryCentral China Normal UniversityWuhan 430079China State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering Key Laboratory of Green Pesticide and Agricultural BioengineeringMinistry of EducationGuizhou UniversityGuiyang 550025China

In the second near-infrared channel(NIR-II, 1000–1700 nm), organic and inorganic fluorophores are designed with superior chemical/optical properties to provide real-time information with deeper penetration depth and higher resolution owing to the innate lower light scattering and absorption of the NIR-II imaging than conventional optical imaging. Among them, the small-molecule based fluorophores have been highlighted due to their desirable biocompatibility and favorable pharmacokinetics. In this review, we introduced the latest research progress of the rational design of small-molecule NIR-II fluorophores and their impressively biological applications including the NIR-II signal imaging,multimodal imaging and theranostic.

关键词： Small-molecule fluorophores The second near-infrared channel Benzo-bisthiadiazole Biomedical imaging

Spatial distribution and reconstruction potential of Japanese anchovy(Engraulis japonicus) based on scale deposition records in recent anaerobic sediment of the Yellow Sea and East China Sea

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Acta Oceanologica Sinica 2014年第12期33卷 138-144页

作者： HUANG Jiansheng sun yao JIA Haibo YANG Qian TANG Qisheng College of Ocean and Earth Science Xiamen University Yellow Sea Fisheries Research Institute Chinese Academy of Fishery Sciences

Many studies have revealed that anchovy has exhibited large variability in population size on decadal tim-escales. However, such works concerning anchovy population are mainly based on short historical catch records. In order to understand the causes of variability in fish stocks （natural and/or anthropogenic） and calibrate the error between catches and standing stocks, it is essential to develop long-term time series of fish stocks from the time when human impacts are minimal or negligible. Well preserved fish scales from sediment record are regarded as useful indicators revealing the history of fish population dynamics over the last centuries. Anchovy scales was first analyzed over the Yellow Sea and East China Sea and the largest abundance was found in the central South Yellow Sea where is regarded as the largest overwintering ground for Japanese anchovy （Engraulis japonicas）. Thus in the central South Yellow Sea, two cores covering the last 150 years were collected for estimating fish scale flux. The scale deposition rate （SDR） records show that the decadal scale SDRs were obviously coherent between cores with independent chronologies. Thecalibration of downcore SDRs to the standing stocks of anchovy further validated that SDR is a reliable proxy to recon-struct the long-term anchovy population dynamic in the central South Yellow Sea where anoxic conditions prevail in the sediment. When assembled with other productivity proxies, it would be expected that SDR could be associated with changes in oceanic productivity and may make a contribution to determine the forcing factors and elucidate the mechanism of the process in future.

关键词： anchovy the Yellow Sea and East China Sea population dynamic reconstruction potential

Electrical conductivities of carbon nanotube-filled polycarbonate/polyester blends

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Science China Chemistry 2012年第5期55卷 808-813页

作者： XIONG ZhuoYue sun yao WANG Li GUO ZhaoXia YU Jian Key Laboratory of Advanced Materials(MOE) Department of Chemical EngineeringTsinghua UniversityBeijing 100084China

Carbon nanotube (CNT)-filled polycarbonate (PC)/poly(butylene terephthalate) (PBT) and polycarbonate (PC)/poly(ethylene terephthalate) (PET) blends containing 1 wt% CNTs over a wide range of blend compositions were prepared by melt mixing in a torque rheometer to investigate the structure-electrical conductivity relationship. Field emission scanning electron microscopy was used to observe the blend morphology and the distribution of CNTs. The latter was compared with the thermodynamic predictions through the calculation of wetting coefficients. It was found that CNTs are selectively localized in the polyester phase and conductive blends can be obtained over the whole composition range (20 wt%, 50 wt% and 80 wt% PBT) for CNT-filled PC/PBT blends, while conductive CNT-filled PC/PET blends can only be obtained when PET is the continuous phase (50 wt%, 80 wt% PET). The dramatic difference in the electrical conductivity between the two types of CNT-filled PC/polyester blends at a low polyester content (20 wt%) was explained by the size difference of the dispersed phases on the basis of the transmission electron microscope micrographs.

关键词： electrical resistivity polyester carbon nanotubes polycarbonate