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A temporal–spatial Atlas of Peripheral Nerve Evoked Cortex Potential in Rat:A Novel Testbed to Explore the Responding Patterns of the Brain to Peripheral Nerves

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Engineering 2022年第7期8卷 147-155页

作者： Xiaofeng Yin Jiuxu Deng Bo Chen Bo Jin Xinyi Gu Zhidan Qi Kunpeng Leng Baoguo Jiang Department of Trauma and Orthopedics Peking University People’s HospitalBeijing 100044China

Observing the dynamic progress of the brain in response to peripheral nerve stimulation as a whole is the basis for a deeper understanding of overall brain function;however,it remains a great *** this work,a novel mini-invasive orthogonal recording method is developed to observe the overall evoked cortex potential(ECP)in rat brain.A typical ECP atlas with recognizable waveforms in the rat cortex corresponding to the median,ulnar,and radial nerve trunks and subdivided branches is *** exciting temporal–spatial progress in the rat brain is obtained and visualized for the first *** in the ECPs and exciting sequences in the cortex four months after median nerve transection are also *** results suggest that the brain’s response to peripheral stimulation has precise and reproducible temporal–spatial *** resource can serve as a testbed to explore the overall functional interaction and dynamic remodeling mechanisms between the peripheral and central nervous systems over time.

关键词： Peripheral nerve Brain Evoked cortex potential temporal–spatial Atlas

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temporal–spatial distribution and diastereoisomer pattern of hexabromocyclododecane in the vicinity of a chemical plant

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Journal of Environmental Sciences 2019年第8期31卷 203-212页

作者： Xinlei Wang Ruirui Sun Yuedong Chen Xu Zhang Zhaojie Cui School of Environmental Science and Engineering Shandong University Department of Plant and Microbial Biology University of Zurich

Hexabromocyclododecane(HBCD) is an effective brominated flame-retardant additive, which is mainly produced in the coastal area of China. This study collected soil samples from a HBCD production plant and its surrounding area in Weifang, Shandong Province, China, and analyzed the temporal–spatial distribution of HBCD and its diastereoisomers in soil. The analysis results showed that the concentration of HBCD in soil near the plant was much higher than normal values, with an annual average concentration reaching 5405 ng/g. Soils 1,2 and 4 km away from the plant were also analyzed, showing that the concentration of HBCD in soil decreased accordingly with the distance from the pollution sources. In order to investigate the effect of the season on HBCD content, the soil samples were collected in all four seasons of the year 2017–2018. According to variations in the wind direction, the concentration of HBCD in soil was also changed. The distribution trend showed that the concentration of HBCD in soil in the downwind direction of the prevailing wind was higher than that in the upwind direction. In addition, this work analyzed the distribution of HBCD in vertical soil sections. It was found that the concentration of HBCD decreased with depth in the soil vertical profile. Finally, the various diastereoisomer patterns in the soil compartments were examined, finding that α-HBCD and γ-HBCD were the predominant diastereoisomers in the soil of the study area.

关键词： Hexabromocyclododecane(HBCD) temporal–spatial distribution Diastereoisomers Seasonal variation Soil

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