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Current spin polarization of a platform molecule with compression effect

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Chinese Physics B 2022年第7期31卷 498-504页

作者： Zhi Yang Feng Sun deng-hui chen Zi-Qun Wang Chuan-Kui Wang Zong-Liang Li Shuai Qiu Shandong Key Laboratory of Medical Physics and Image Processing&Shandong Provincial Engineering and Technical Center of Light Manipulations School of Physics and ElectronicsShandong Normal UniversityJinan 250358China Zao Zhuang University Zao Zhuang 277160China

Using the first-principles method,the spin-dependent transport properties of a novel platform molecule containing a freestanding molecular wire is investigated by simulating the spin-polarized scanning tunneling microscope experiment with Ni tip and Au substrate *** calculations show that the total current increases as the tip gradually approaches to the substrate,which is consistent with the conductance obtained from previous *** interestingly,the spin polarization(SP)of current modulated by compression effect has the completely opposite trend to the total *** analyses reveal that the reduction of SP of current with compression process originates from the promotion of spin-down electron channel,which is controlled by deforming the molecule *** addition,the density of states shows that the SP of current is directly affected by the organic–ferromagnetic *** weak orbital hybridization between the Ni tip and propynyl of molecule results in high interfacial SP,whereas the breaking of the C≡C triple of propynyl in favor of the Ni–C–C bond induces the strong orbital hybridization and restrains the interfacial *** work proposes a new way to control and design the SP of current through organic–ferromagnetic spinterface using functional molecular platform.

关键词： molecular spintronics spin-dependent transport spin polarization single-molecule junctions

Generic-Model-Based Description Scheme for MPEG-7

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Wuhan University Journal of Natural Sciences 2004年第3期9卷 283-287页

作者： DenqJuan Tanhui chen.Xin-meng SchoolofComputer WuhanUniversityWuhan430072HubeiChina

We propose a new description scheme for MPEG-7:Generic-model-based Description Scheme to describe contents of audio, video, text and other sorts of multimedia. It uses a generic model as the description frame, which provides a simple but useful object\|based structure. The main components of the description scheme are generic model, objects and object features. The proposed description scheme is illustrated and exemplified by Extensible Markup Language. It aims at clarity and flexibility to support MPEG\|7 applications such as query and edit. We demonstrate its feasibility and efficiency by presenting applications: Digital Broadcasting and Edit System (DEBS) and Non\|linear Edit System (NLES) that already used the generic structure or will greatly benefit from it.

关键词： generic model object description scheme XML MPEG-7

LA-ICP-MS zircon U-Pb dating of tuffites in the Sachakou Pb-Zn mining area, Karakorum, Xinjiang and its establishment of Early Triassic strata

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China Geology 2024年第1期7卷 150-152页

作者： Xiao-jian Zhao Nuo Li Kai Weng Ming Wang Qing-lin Sui deng-hui chen Zhou-ping Guo Meng-qi Jin Xi’an Center China Geological SurveyMinistry of Natural ResourcesXi’an 710054China Xinjiang Research Center for Mineral Resources Xinjiang Institute of Ecology and GeographyChinese Academy of SciencesUrumqi 830011China College of Geography and Remote Sensing Sciences Xinjiang UniversityUrumqi 830046China University of Chinese Academy of Sciences Beijing 100029China No.8 Geological Party Xinjiang Bureau of Geology and Mineral Exploration and DevelopmentAksu 843000China School of Resource&Environment and Safety Engineering University of South ChinaHengyang 421001China

*** In the past decade,a group of medium to giant lead-zinc deposits,represented by Huoshaoyun,Sachakou,and Yuanbaoling,have been discovered in the Aksai Chin region of Karakoram,*** are all located in the Mesozoic carbonate and clastic rock *** Sachakou leadzinc mining area is adjacent to the northwest of the Huoshaoyun lead-zinc mining area and is in the same stratigraphic layer as *** many scholars have been arguing about the type and age of Huoshaoyun lead-zinc mineralization,few scholars have paid attention to the classification of the ore-bearing strata in the *** stratigraphy of the Lower Permian Shenxianwan Group to the Upper Cretaceous Tielongtan Group is exposed in the Sachakou area of Karakorum,Xinjiang,however,the Late Permian-Early Triassic stratigraphy is missing(Fig.1a).Due to the harsh natural conditions in the area and the low level of work,the stratigraphic delineation is not exhaustive,and the regional lithology is dominated by carbonates and clastic rocks,which makes it difficult to identify the age of the regional lithology and causes problems for the exploration and research of lead-zinc in the area.

关键词： strata Triassic Xinjiang

Autophagy-targeting modulation to promote peripheral nerve regeneration

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Neural Regeneration Research 2025年第7期20卷 1864-1882页

作者： Yan chen Hongxia deng Nannan Zhang Department of Obstetrics and Gynecology West China Second HospitalSichuan UniversityChengduSichuan ProvinceChina Key Laboratory of Birth Defects and Women and Children’s Diseases Ministry of EducationSichuan UniversityChengduSichuan ProvinceChina Laboratory of Reproductive Endocrinology and Reproductive Regulation Sichuan UniversityChengduSichuan ProvinceChina National Center for Birth Defect Monitoring West China Second University HospitalSichuan UniversityChengduSichuan ProvinceChina

Nerve regeneration following traumatic peripheral nerve injuries and neuropathies is a complex process modulated by diverse factors and intricate molecular *** studies have focused on factors that stimulate axonal outgrowth and myelin ***,recent studies have highlighted the pivotal role of autophagy in peripheral nerve regeneration,particularly in the context of traumatic ***,autophagy-targeting modulation has emerged as a promising therapeutic approach to enhancing peripheral nerve *** current understanding suggests that activating autophagy facilitates the rapid clearance of damaged axons and myelin sheaths,thereby enhancing neuronal survival and mitigating injury-induced oxidative stress and *** actions collectively contribute to creating a favorable microenvironment for structural and functional nerve regeneration.A range of autophagyinducing drugs and interventions have demonstrated beneficial effects in alleviating peripheral neuropathy and promoting nerve regeneration in preclinical models of traumatic peripheral nerve *** review delves into the regulation of autophagy in cell types involved in peripheral nerve regeneration,summarizing the potential drugs and interventions that can be harnessed to promote this *** hope that our review will offer novel insights and perspectives on the exploitation of autophagy pathways in the treatment of peripheral nerve injuries and neuropathies.

关键词： autophagy autophagy related genes Charcot–Marie–Tooth diseases diabetic peripheral neuropathy metformin myelination peripheral nerve injury Schwann cells sciatic nerve Wallerian degeneration

Post-tunable salt gel electrolytes toward flexible supercapacitor switches

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Journal of Energy Chemistry 2025年第1期100卷 114-124页

作者： hui Wang Shuang chen Xuming Liu Qin Zhang Xin Liu Polymeric and Soft Materials Laboratory School of Chemistry and Life Science and Advanced Institute of Materials Science Changchun University of Technology Polymeric and Soft Materials Laboratory School of Chemical Engineering and Advanced Institute of Materials Science Changchun University of Technology

Convertible hydrogel supercapacitors have emerged as promising energy storage devices in switches,diodes, and transistors. However, inherent weaknesses in ionic conductivity, mechanical properties,and water retention of hydrogel electrolytes seriously hinder their development. Inspired by the hardness conversion of sea cucumber skin, a conductivity and mechanics dual-tunable salt gel electrolyte is successfully designed. The salt gel presents a reversible switching of conductors-insulators and a mechanical regulation between softness and hardness via the dissolution-crystallization transition of sodium acetate trihydrate（SAT）. Meanwhile, the salt gels spontaneously grow a layer of “armor” through saturated phase-change salt crystals effectively reducing water evaporation of hydrogel ***, this phase-change soft-rigid conversion strategy will expand the capabilities of gel-based flexible supercapacitors(area capacitance: 258.6 mF cm-2), and the capacitance retention rate could still reach 86.9% after 3000 cycles at high temperatures. Moreover, the salt gel supercapacitor is potentially used in over-heat alarm systems. It is anticipated that the strategy of conductivity and mechanics of dual-tunable salt gel would provide a new perspective on the development of energy storage devices,wearable electronics, and flexible robots.

关键词： Capacitance

Reconstruction of Current Profiles and q Profiles on the HL-1M Tokamak

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Chinese Physics Letters 1999年第2期16卷 114-116页

作者： XU Wen-bin YANG Qing-wei WANG En-yao LI Guang-sheng GUO Gan-cheng LIU Li LI Fang-zhu DONG Jia-qi deng hui-chen YE Gao-ying LIN Hao-shu Southwestern Institute of Physics Chengdu 610041

The algorithm for reconstructing plasma current and safety factor profiles on a tokamak with an iron core transformer is given and applied to the analysis of experimental *** is shown that a central negative magnetic shear region is realized througth ajusting the ramp-up rate of plasma current in ohmic discharges and through lower hybrid current drive on HL-1M tokamak.

关键词： tokamak Profiles Tokamak

Isobaric enzymatic assays reveal depth-dependent variation in microbial ectoenzyme activities in the deepest ocean on Earth

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Science China Earth Sciences 2025年第1期68卷 185-194页

作者： Junwei CAO Jiahua WANG Hongge ZHANG Junhao deng Binbin PAN Jiawang chen Li ZHANG Jiasong FANG College of Oceanography and Ecological Science Shanghai Ocean University Ocean College Zhejiang University Laboratory for Marine Biology and Biotechnology Qingdao National Laboratory for Marine Science and Technology

Microbial ectoenzymes play essential roles in the transformation and mineralization of organic matter in the ***, conventional methods for measuring microbial ectoenzyme activities(MEAs) in the deep ocean under atmospheric conditions can misrepresent the metabolic activities of indigenous microbial communities. To overcome this limitation, we measured the activities of three microbial ectoenzymes(aminopeptidase, α-glucosidase, and β-glucosidase) under both atmospheric and in situ pressure conditions in seawater collected using pressure-retaining and non-pressure-retaining samplers in the Challenger Deep, Mariana Trench. In the case of aminopeptidase and α-glucosidase, the highest isobaric MEAs were observed in the surface layer(50 m), followed by those at abyssopelagic depths(4,000–6,000 m) for aminopeptidase, hadal realm(10,903 m)for α-glucosidase, while β-glucosidase activity exhibited the highest value at 10,903 m. Furthermore, the isobaric MEAs in hadal waters were commonly found to be higher than the decompressed counterparts, highlighting the importance of pressure-retaining sampling and isobaric enzymatic assays. The half-saturation constant(Km) showed a general decreasing trend with depth,suggesting that the deep ocean microbes might have adapted to the high-pressure and oligotrophic environment by increasing their ectoenzyme's affinity to substrate. Furthermore, particle-free MEAs contribute more to the total MEAs in the deep ocean than particle-associated MEAs, suggesting the significance of cell-associated and dissolved ectoenzymes in ocean *** study provides a foundation for future investigations of MEAs in the ocean and has important implications for understanding the dynamics of microbially mediated biogeochemical cycling in marine ecosystems.

关键词： Pressure-retaining sampling Microbial ectoenzyme activity Deep-sea microbes High pressure Mariana Trench

医院市场竞争与不同严重程度疾病医疗费用关系的比较研究——基于行手术治疗的腰椎间盘突出和老年性白内障住院病例的实证分析

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现代预防医学 2019年第23期46卷 4293-4297页

作者：邓晨卉潘杰四川大学华西公共卫生学院/四川大学华西第四医院

目的探讨和比较医院市场竞争与相对严重疾病和相对不严重疾病医疗费用的关系。方法采用赫芬达尔—赫希曼指数衡量医院市场竞争程度。分别选择行手术治疗的腰椎间盘突出和行手术治疗的老年性白内障作为相对严重疾病和相对不严重疾病的代... 详细信息

目的探讨和比较医院市场竞争与相对严重疾病和相对不严重疾病医疗费用的关系。方法采用赫芬达尔—赫希曼指数衡量医院市场竞争程度。分别选择行手术治疗的腰椎间盘突出和行手术治疗的老年性白内障作为相对严重疾病和相对不严重疾病的代表,使用2017年第四季度四川省病案首页数据,通过多重线性回归模型分析比较医院市场竞争与两种疾病住院总费用、药费和检查费的关系。结果本文共纳入3 887例行手术治疗的腰椎间盘突出患者和27 477例行手术治疗的老年性白内障患者。结果显示,医院竞争每增加10%,行手术治疗的腰椎间盘突出病人的住院总费用增加8.05%(B=-0.84, 95%CI:-1.038～-0.640,P<0.001),而行手术治疗的老年性白内障病人的住院总费用减少2.59%(B=0.26, 95%CI:0.17～0.34,P<0.001)。亚组费用分析结果显示,医院竞争每增加10%,行手术治疗的腰椎间盘突出病人的药费增加18.93%(B=-2.10, 95%CI:-2.52～-1.68,P<0.001),检查费降低5.28%(B=0.52, 95%CI:0.25～0.78,P<0.001);而行手术治疗的老年性白内障病人的药费和检查费则分别减少4.62%(B=0.45, 95%CI:0.27～-0.63,P<0.001)和8.63%(B=0.83, 95%CI:0.55～1.10,P<0.001)。结论在不同严重程度的医疗市场中,市场竞争与医疗费用的关系存在差异。

关键词：医院竞争市场集中度医疗费用

Ru doping triggering reconstruction of cobalt phosphide for coupling glycerol electrooxidation with seawater electrolysis

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Journal of Energy Chemistry 2025年第1期100卷 317-326页

作者： Binglu deng Jie Shen Jinxing Lu Chuqiang Huang Zhuoyuan chen Feng Peng Yunpeng Liu School of Materials Science and Hydrogen Energy Foshan University School of Chemistry and Chemical Engineering Guangzhou University Guangdong Key Laboratory for Hydrogen Energy Technologies

Seawater electrolysis is a promising approach for sustainable energy without relying on precious ***,the large-scale seawater electrolysis is hindered by low catalytic efficiency and severe anode corrosion caused by the harmful *** contrast to the oxygen evolution reaction （OER）and chlorin ion oxidation reaction （ClOR）,glycerol oxidation reaction （GOR） is more thermodynamically and kinetically favorable ***,a Ru doping cobalt phosphide （Ru-CoP2） is proposed as a robust bifunctional electrocatalyst for seawater electrolysis and GOR,for the concurrent productions of hydrogen and value-added *** in situ and ex situ characterization analyses demonstrated that Ru doping featured in the dynamic reconstruction process from Ru-CoP2to Ru-CoOOH,accounting for the superior GOR *** coupling GOR with hydrogen evolution was realized by employing Ru-CoP2as both anode and cathode,requiring only a low voltage of 1.43 V at 100 mA cm-2,which was 250 m V lower than that in alkaline *** work guides the design of bifunctional electrocatalysts for energy-efficient seawater electrolysis coupled with biomass resource upcycling.

关键词： Anodes