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多宝山铜矿硫同位素空间分布特征

地质与勘探 2008年第1期44卷 46-49页

作者：冯健行黑龙江省第五地质勘察院黑河164300

多宝山铜矿是一大型斑岩铜矿床。矿床位于大兴安岭隆起带与松辽沉降带的接合部位。矿区出露的地层主要是奥陶系中统多宝山组地层岩性主要为安山岩、凝灰岩、凝灰质砂岩、砂岩;侵入岩主要是华力西晚期花岗闪长斑岩和花岗闪长岩;围绕花岗... 详细信息

多宝山铜矿是一大型斑岩铜矿床。矿床位于大兴安岭隆起带与松辽沉降带的接合部位。矿区出露的地层主要是奥陶系中统多宝山组地层岩性主要为安山岩、凝灰岩、凝灰质砂岩、砂岩;侵入岩主要是华力西晚期花岗闪长斑岩和花岗闪长岩;围绕花岗闪长斑岩体具有蚀变分带现象,由内向外分为钾化带—绢云母化带—青磐岩化带,矿体多产于绢云母化带内;研究表明,多宝山铜矿形成于中低温条件下,矿体内金属硫化物具有分带性,由矿体中心向边缘依次是斑铜矿—黄铜矿—黄铁矿。文章对多宝山铜矿硫同位素空间分布特征以及与矿体富集部位的对应关系进行了分析,并解释了形成这一现象的原因。

关键词：铜矿同位素特征多宝山

A New Type of Silicone Rubber Membrane for Amperometric Oxygen Gas Sensor

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Chemical Research in Chinese Universities 1996年第1期12卷 114-119页

作者： LIU Shan-jun and SHEN Han-xi(Department of Chemistry, Nankai University, Tianjin, 300071 )QIU Ying-hua and feng jian-xing.(Department of Environmental Science, Nankai University, Tia’din, 300071) NANKAI UNIV DEPT CHEMTIANJIN 300071PEOPLES R CHINA NANKAI UNIV DEPT ENVIRONM SCITIANJIN 300071PEOPLES R CHINA

Synergistic integration of self-supported 1T/2H-WS_(2) and nitrogendoped rGO on carbon cloth for pH-universal electrocatalytic hydrogen evolution

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Nano Research 2024年第3期17卷 1267-1280页

作者： feng Ming Yap jian Yiing Loh Wee-Jun Ong School of Energy and Chemical Engineering Xiamen University MalaysiaSelangor Darul Ehsan 43900Malaysia Center of Excellence for NaNo Energy&Catalysis Technology(CONNECT) Xiamen University MalaysiaSelangor Darul Ehsan 43900Malaysia State Key Laboratory of Physical Chemistry of Solid Surfaces College of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005China Gulei Innovation Institute Xiamen UniversityZhangzhou 363200China Shenzhen Research Institute of Xiamen University Shenzhen 518057China

Hydrogen economy based on electrochemical water splitting exemplified one of the most promising means for overcoming the rapid consumption of fossil fuels and the serious deterioration of global *** development of earth-abundant,efficient,and durable electrocatalysts for hydrogen evolution reaction(HER)plays a vital role in the commercialization of water ***,the self-supported electrode with unique nitrogen-doped reduced graphene oxide(N-rGO)nanoflakes and WS_(2) hierarchical nanoflower that were grown directly on carbon cloth(CC)substrate(WS_(2)/N-rGO/CC)was successfully synthesized using a facile dual-step hydrothermal *** as-synthesized 50%1T/2H-WS_(2)/N-rGO/CC(WGC),which possessed high metallic 1T phase of 57%not only efficiently exposed more active sites and accelerated mass/charge diffusion,but also endowed excellent structural lustiness,robust stability,and durability at a high current *** a result,the 50%WGC exhibited lower overpotentials and Tafel slopes of 21.13 mV(29.55 mV∙dec^(-1))and 80.35 mV(137.02 mV∙dec^(-1))as compared to 20%Pt-C/CC,respectively for catalyzing acidic and alkaline hydrogen evolution ***,the as-synthesized 50%WGC also depicted long-term stability for more than 8 h in the high-current-density regions(100 and 220 mA∙cm^(-2)).In brief,this work reveals a self-supported electrode as an extraordinary alternative to Pt-based catalysts for HER in a wide pH range,while paving a facile strategy to develop advanced electrocatalysts with abundant heterointerfaces for practical applications in energy-saving hydrogen production.

关键词： self-supported electrocatalyst carbon-based substrate phase engineering pH-universal water splitting

Healthy life expectancy with cardiovascular disease among Chinese rural population based on the prospective cohort study

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Journal of Geriatric Cardiology 2024年第8期21卷 799-806页

作者： feng jianG Xiao-Tian LIU Ze HU Wei LIAO Shuo-Yi LI Rui-Fang ZHU Zhen-xing MAO jian HOU Sohail Akhtar Fayaz Ahmad Tahir Mehmood Chong-jian WANG Department of Epidemiology and Biostatistics College of Public HealthZhengzhou UniversityZhengzhouChina Department of Mathematics and Statistics The University of HaripurHaripurPakistan School of Natural Sciences National University of Sciences and TechnologyIslamabadPakistan

BACKGROUND Limited research has explored the impact of cardiovascular disease(CVD)on healthy life expectancy(HLE)especially in resource-limited *** study aimed to investigate the association between CVD and HLE in Chinese rural *** This study included 11,994 participants aged 45 years and older from the baseline and follow-up surveys of the Henan rural cohort *** status was measured via a Visual Analogue *** multistate Markov model was applied to estimate the association between CVD and transitions in health,unhealthiness and ***-specific total life expectancy,HLE and unhealthy life expectancy were calculated by the multistate life table *** During a mean follow-up time of 3.85(3.84–3.86)years,there were 588 deaths *** individuals with CVD,the risk of switching from health to unhealthiness status was increased by 71%[hazard ratio(HR)=1.71,95%CI:1.42–2.07],the chance of recovery was reduced by 30%(HR=0.70,95%CI:0.60–0.82).Men aged 45 years without CVD could gain an extra 7.08(4.15–10.01)years of HLE and lose 4.00(1.60–6.40)years of unhealthy life expectancy compared to their peers with CVD,*** corresponding estimates among women were 8.62(5.55–11.68)years and 5.82(2.59–9.04)years,*** This study indicated that CVD was significantly associated with poorer health status and lower HLE among Chinese rural *** is an important public health policy to adopt targeted measures to reduce the CVD burden and enhance the quality of life and HLE in resource-limited areas.

关键词： Healthy cardiovascular life

Mast cell degranulation-triggered by SARS-CoV-2 induces tracheal-bronchial epithelial inflammation and injury

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Virologica Sinica 2024年第2期39卷 309-318页

作者： jian-Bo Cao Shu-Tong Zhu Xiao-Shan Huang xing-Yuan Wang Meng-Li Wu Xin Li feng-Liang Liu Ling Chen Yong-Tang Zheng jian-Hua Wang Guangzhou Institutes of Biomedicine and Health Chinese Academy of SciencesGuangzhou 510530China School of Life Sciences and Medicine University of Science and Technology of ChinaHefei 230026China Key Laboratory of Bioactive Peptides of Yunnan Province Key Laboratory of Animal Models and Human Disease Mechanisms of the Chinese Academy of SciencesKIZCUHK Joint Laboratory of Bioresources and Molecular Research in Common DiseasesCenter for Biosafety Mega-ScienceKunming Institute of ZoologyChinese Academy of SciencesKunming 650223China University of Chinese Academy of Sciences Beijing 101408China

SARS-CoV-2 infection-induced hyper-inflammation is a key pathogenic factor of *** research,along with others',has demonstrated that mast cells(MCs)play a vital role in the initiation of hyper-inflammation caused by *** previous study,we observed that SARS-CoV-2 infection induced the accumulation of MCs in the peri-bronchus and bronchioalveolar-duct junction in humanized ***,we found that MC degranulation triggered by the spike protein resulted in inflammation in alveolar epithelial cells and capillary endothelial cells,leading to subsequent lung *** trachea and bronchus are the routes for SARS-CoV-2 transmission after virus inhalation,and inflammation in these regions could promote viral *** are widely distributed throughout the respiratory ***,in this study,we investigated the role of MCs and their degranulation in the development of inflammation in tracheal-bronchial *** analyses showed the accumulation and degranulation of MCs in the peri-trachea of humanized mice infected with *** degranulation caused lesions in trachea,and the formation of papillary hyperplasia was *** transcriptome analysis in bronchial epithelial cells,we found that MC degranulation significantly altered multiple cellular signaling,particularly,leading to upregulated immune responses and *** administration of ebastine or loratadine effectively suppressed the induction of inflammatory factors in bronchial epithelial cells and alleviated tracheal injury in *** together,our findings confirm the essential role of MC degranulation in SARS-CoV-2-induced hyper-inflammation and the subsequent tissue ***,our results support the use of ebastine or loratadine to inhibit SARS-CoV-2-triggered degranulation,thereby preventing tissue damage caused by hyper-inflammation.

关键词： SARS-CoV-2 Mast cell(MC) Bronchial epithelial cell Inflammation Tracheal injury

Cable coupling response in metal cavity under X-ray irradiation

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NUCLEAR SCIENCE AND TECHNIQUES 2024年第10期35卷 1-11页

作者： Zhang, Mao-xing Yuan, Lan-feng Meng, Cui Liu, Yi-Nong Tsinghua Univ Dept Engn Phys Beijing 100084 Peoples R China Minist Educ Lab Particle & Radiat Imaging Beijing 100084 Peoples R China Zhejiang Univ Coll Elect Engn Hangzhou 310007 Peoples R China

This study investigates the coupling response of cables inside a metal cavity under X-ray irradiation using the finite-difference time-domain method, particle simulation method, and transmission-line equation to solve the electromagnetic field inside the cavity and load voltage at the cable terminal under X-ray excitation. The results show that under a strong ionizing radiation environment of 1J/cm2\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$${1}\,{\hbox {J/cm}{2}}$$\end{document}, a strong electromagnetic environment is generated inside the cavity. The cable shielding layer terminal couples a voltage of 15.32 V, whereas the core wire terminal couples a voltage of 0.31 V. Under strong X-ray irradiation, the metal cavity not only fails to provide electromagnetic shielding, but also introduces new electromagnetic interference. This study also provides a method for reducing the number of emitted electrons by adding low-Z materials, which can effectively reduce the coupled electric field and voltage.

关键词： Ionizing radiation Metal cavity System-generated electromagnetic pulse Transmission-line model SIMULATION CODE EQUATIONS IEMP

Embedded Majorana islands

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Science China(Physics,Mechanics & Astronomy) 2024年第9期67卷 154-164页

作者： Jin-xing Hou Alex Weststrom Rui Wang Wen-Li Yang jian Li Institute of Modern Physics Northwest UniversityXi’an 710127China Department of Physics School of ScienceWestlake UniversityHangzhou 310030China Shaanxi Key Laboratory for Theoretical Physics Frontiers Xi’an 710127China Institute of Natural Sciences Westlake Institute for Advanced StudyHangzhou 310024China National Laboratory of Solid State Microstructures and Department of Physics Nanjing UniversityNanjing 210093China Collaborative Innovation Center for Advanced Microstructures Nanjing 210093China Peng Huanwu Center for Fundamental Theory Xi’an 710127China

Mesoscopic superconducting islands hosting Majorana zero modes(MZMs),or Majorana islands in short,offer a prototype of topological *** this work we investigate theoretically the model of a generic Majorana island tunneling-coupled to a singlepiece metallic substrate,hence an embedded Majorana *** show the crucial consequences of an interplay between the topological ground states nonlocally addressed by the MZMs and the metallic bath with coherent electron propagation:on the one hand,the topological degeneracy on the Majorana island can be preserved,by virtue of the particle-hole symmetry,despite the apparent bath-induced coupling between MZMs;on the other hand,the electronic interference in the metallic bath may lead to profound alterations to the renormalization group behavior of the hybrid system towards low energy/temperature compared with conventional Kondo *** work serves to establish the model of embedded Majorana islands as an experimentally relevant and theoretically intriguing problem particularly in the direction of topological quantum computation.

关键词： topological quantum computation Majorana zero modes topological qubit mesoscopic superconductor topological Kondo effect

Hypoxia-mediated programmed cell death is involved in the formation of wooden breast in broilers

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Journal of Animal Science and Biotechnology 2024年第5期15卷 1918-1931页

作者： Xinrui Zhang Tong xing Lin Zhang Liang Zhao feng Gao College of Animal Science and Technology Key Laboratory of Animal Origin Food Production and Safety Guarantee of Jiangsu ProvinceJiangsu Collaborative Innovation Center of Meat Production and ProcessingQuality and Safety ControlNanjing Agricultural UniversityNo.1 WeigangNanjingJiangsu 210095P.R.China

Background Wooden breast(WB)myopathy is a common myopathy found in commercial broiler chickens *** examination has revealed that WB myopathy is accompanied by damage to the pectoralis major(PM)***,the underlying mechanisms responsible for the formation of WB in broilers have not been fully *** study aimed to investigate the potential role of hypoxia-mediated programmed cell death(PCD)in the formation of WB *** Histological examination and biochemical analysis were performed on the PM muscle of the control(CON)and WB groups.A significantly increased thickness of the breast muscle in the top,middle,and bottom portions(P<0.01)was found along with pathological structure damage of myofibers in the WB *** number of capillaries per fiber in PM muscle,and the levels of p O_(2) and s O_(2) in the blood,were significantly decreased(P<0.01),while the levels of p CO_(2) and TCO_(2) in the blood were significantly increased(P<0.05),suggesting hypoxic conditions in the PM muscle of the WB *** further evaluated the PCD-related pathways including autophagy,apoptosis,and necroptosis to understand the consequence response to enhanced hypoxic conditions in the PM muscle of birds with *** ratio of LC3 II to LC3 I,and the autophagy-related factors HIF-1α,BNIP3,Beclin1,AMPKα,and ULK1 at the m RNA and protein levels,were all significantly upregulated(P<0.05),showing that autophagy occurred in the PM muscle of the WB *** apoptotic index,as well as the expressions of Bax,Cytc,caspase 9,and caspase 3,were significantly increased(P<0.05),whereas Bcl-2 was significantly decreased(P<0.05)in the WB-affected PM muscle,indicating the occurrence of apoptosis mediated by the mitochondrial ***,the expressions of necroptosis-related factors RIP1,RIP3,and MLKL,as well as NF-κB and the pro-inflammatory cytokines TNF-α,IL-1β,and IL-6,were all significantly enhanced(P<0.05)in the WB-affected PM *** T

关键词： Apoptosis Autophagy Broiler chicken Hypoxia Necroptosis Wooden breast

Atomic force microscopy-based nanoscale infrared techniques for liquid environments

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Science Bulletin 2024年第2期69卷 151-153页

作者： jian Li Jing Liang Mu-Hao Lan xing-Hua Xia State Key Laboratory of Analytical Chemistry for Life Science School of Chemistry and Chemical EngineeringNanjing UniversityNanjing 210023China

Infrared(IR)light energy matches well with the vibration and rotation of chemical bonds in molecules,hence IR spectroscopy is commonly used for accurate molecular identification[1].Conventional IR analysis involves bulk samples,providing averaged information of the entire *** spatially-resolved investigation of heterogeneous sample properties is constrained by the micrometer-level spatial resolution of optical IR microscopy.

关键词： spatially hence rotation