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22篇 您的检索式:作者名="LI Yeming"
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1Identification of Hercynian shoshonitic intrusive rocks in central Hainan Island and its geotectonic implications显示文摘An identification has been made of some shoshonitic intrusive rocks in central Hainan Island recently. These rocks are K-rich (K2O=2.9%―5.1%, K2O/Na2O=0.95―2.12), distinctly enriched in LILE and LREE, strongly depleted in Nb, Ta, and moder- ately depleted in Sr and Ti, with (87Sr/86Sr)i = 0.70859―0.71425 and ε Nd(t) = (?2.77―?7.49). They were derived from an EMⅡ-type mantle source. The enrichment process is related to metasomatism of depleted mantle caused by a great amount of fluid-melt released from oceanic crust and terri- genous sediments at great depth (eclogite facies) during the subduction of the South China plate under the Indochina-South China Sea plate in the Carbon- iferous–Early Permian. A SHRIMP U-Pb zircon dating yields a crystallization age of 272±7 Ma for the sho- shonitic intrusions, which is coeval with the strongly peraluminous granites found in central Hainan Island. These two kinds of rocks generally possess syn-intrusion ductile deformation structures. Thus they are considered to have been generated during the early stage (syn-thrust phase) of a post-collisional event. The primary magma of shoshonitic rocks was produced at a depth > 80 km by decompression- dehydration melting of previously enriched litho- spheric mantle wedge, phlogopite-bearing garnet peridotite, which was in turn caused by the break-off of a descendent slab and upwelling of a hot as- thenosphere. The rising of melts was accompaniedby crustal contamination and crystallization fractiona- tion (AFC). Combining with other related data, it is proposed that the southwards subduction and amal- gamation of the South China plate with the Indo- China-South China Sea plate took place at ca. 287- 278 Ma, which was a part of the convergence proc- ess of the Pangea supercontinent. The suture zone was probably located along the line of Song Ma-Beibu Gulf-north margin of the Yunkai Moun- tains-Wuyi Mountains.XIE Caifu ZHU Jinchu DING Shijiang ZHANG Yeming FU Tai'an LI Zhihong 2006Chinese Science Bulletin2006,51,20:17
2Metamorphosed mafic rocks with N-type MORE geochemical features in Hainan Island-Remnants of the Paleo-Tethys Oceanic Crust?显示文摘A number of metamorphosed mafic rocks occurred within the Paleozoic strata in the Chenxing and Bangxi regions at the northern side of the Changjiang-Qionghai Fault in Central Hainan Island. These metamorphosed mafic rocks are tholeiites in chemistry. They are characterized by extreme depletion of Th, Nb, Ta and LREEs, resembling the depleted N-type mid-ocean ridge basalts (MORE). Field relations suggest that the protolith of the metamorphosed mafic rocks were likely formed in Paleozoic. These metamorphosed mafic rocks with N-type MORB geochemical features were probably the remnants of the Paleo-Tethys oceanic crust.LI Xianhua, ZHOU Hanwen, DING Shijiang, LEE Chi-yu, ZHANG Renjie, ZHANG Yeming & GE Wenchun1. Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China 2. Hainan Geological Survey, Haikou 570206, China 3. Department of Geology, Taiwan University, Taipei 106-17, China 4. Yichang Institute of Geology and Mineral Resources, Chinese Academy of Geological Sciences, Yichang 443003, China 2000Chinese Science Bulletin2000,45,10:9
3Analysis of Power Matching on Energy Savings of a Pneumatic Rotary Actuator Servo-Control System显示文摘When saving energy in a pneumatic system,the problem of energy losses is usually solved by reducing the air supply pressure.The power-matching method is applied to optimize the air-supply pressure of the pneumatic system,and the energy-saving effect is verified by experiments.First,the experimental platform of a pneumatic rotary actuator servo-control system is built,and the mechanism of the valve-controlled cylinder system is analyzed.Then,the output power characteristics and load characteristics of the system are derived,and their characteristic curves are drawn.The employed air compressor is considered as a constant-pressure source of a quantitative pump,and the power characteristic of the system is matched.The power source characteristic curve should envelope the output characteristic curve and load characteristic curve.The minimum gas supply pressure obtained by power matching represents the optimal gas supply pressure.The comparative experiments under two different gas supply pressure conditions show that the system under the optimal gas supply pressure can greatly reduce energy losses.Yeming Zhang Hongwei Yue Ke Li Maolin Cai 2020Chinese Journal of Mechanical Engineering2020,33,2:3
4Regulation of the order-disorder phase transition in a Cs_(2)NaFeCl_(6) double perovskite towards reversible thermochromic application显示文摘Multifunctional lead-free double perovskites demonstrate remarkable potential towards applications in various fields.Herein,an environmentally-friendly,low-cost,high-throughput Cs_(2)NaFeCl_(6) single crystal with exceedingly high thermal stability is designed and grown.It obtains a cubic lattice system in the temperature range of 80-500 K,accompanied by a completely reversible chromatic variation ranging from yellow to black.Importantly,the intriguing thermochromism is proved to own extremely high reproducibility(over 1000 cycles)without a hysteretic effect,originating from its structural flexibility that including(i)the noteworthy distortion/deformation of[NaCl_(6)]5−and[FeCl_(6)]3−octahedra;(ii)order-disorder arrangement transition of[NaCl_(6)]5−and[FeCl6]3−octahedra as the function of temperature.This study paves the way towards a new class of smart windows and camouflage coatings with an unprecedented colour range based on a Cs_(2)NaFeCl_(6) perovskite.Wenzhe Li Naveed Ur Rahman Yeming Xian Hang Yin Yunkai Bao Yi Long Songyang Yuan Yangyi Zhang Yaxuan Yuan Jiandong Fan 2021Journal of Semiconductors2021,42,7:2
5The ER membrane protein complex subunit Emc3 controls angiogenesis via the FZD4/WNT signaling axis显示文摘The endoplasmic reticulum(ER) membrane protein complex(EMC) regulates the synthesis and quality control of membrane proteins with multiple transmembrane domains. One of the membrane spanning subunits, EMC3, is a core member of the EMC complex that provides essential hydrophilic vestibule for substrate insertion. Here, we show that the EMC subunit Emc3 plays critical roles in the retinal vascular angiogenesis by regulating Norrin/Wnt signaling. Postnatal endothelial cell(EC)-specific deletion of Emc3 led to retarded retinal vascular development with a hyperpruned vascular network, the appearance of bluntended, aneurysm-like tip endothelial cells(ECs) with reduced numbers of filopodia and leakage of erythrocytes at the vascular front. Diminished tube formation and cell proliferation were also observed in EMC3 depleted human retinal endothelial cells(HRECs). We then discovered a critical role for EMC3 in expression of FZD4 receptor of β-catenin signaling using RNA sequencing, real-time quantitative PCR(RT-q PCR) and luciferase reporter assay. Moreover, augmentation of Wnt activity via lithium chloride(Li Cl) treatment remarkably enhanced β-catenin signaling and cell proliferation of HRECs. Additionally, Li Cl partially reversed the angiogenesis defects in Emc3-c KO mice. Our data reveal that Emc3 plays essential roles in angiogenesis through direct control of FZD4 expression and Norrin/β-catenin signaling.Mu Yang Shujin Li Wenjing Liu† Xiao Li Yunqi He Yeming Yang Kuanxiang Sun Lin Zhang Wanli Tian Lixin Duan Huafu Chen Dezhong Yao Zhenglin Yang Xianjun Zhu 2021Science China(Life Sciences)2021,64,11:2
6Use of angiotensin-converting enzyme inhibitors and angiotensin Ⅱ receptor blockers in context of COVID-19 outbreak:a retrospective analysis显示文摘The possible effects of angiotensin-converting enzyme inhibitors(ACEIs)or angiotensin Ⅱ receptor blockers(ARBs)on COVID-19 disease severity have generated considerable debate.We performed a single-center,retrospective analysis of hospitalized adult COVID-19 patients in Wuhan,China,who had definite clinical outcome(dead or discharged)by February 15,2020.Patients on anti-hypertensive treatment with or without ACEI/ARB were compared on their clinical characteristics and outcomes.The medical records from 702 patients were screened.Among the 101 patients with a history of hypertension and taking at least one anti-hypertensive medication,40 patients were receiving ACEI/ARB as part of their regimen,and 61 patients were on antihypertensive medication other than ACEI/ARB.We observed no statistically significant differences in percentages of in-hospital mortality(28%vs.34%,P=0.46),ICU admission(20%vs.28%,P=0.37)or invasive mechanical ventilation(18%vs.26%,P=0.31)between patients with or without ACEI/ARB treatment.Further multivariable adjustment of age and gender did not provide evidence for a significant association between ACEI/ARB treatment and severe COVID-19 outcomes.Our findings confirm the lack of an association between chronic receipt of reninangiotensin system antagonists and severe outcomes of COVID-19.Patients should continue previous antihypertensive therapy until further evidence is available.Jiuyang Xu Chaolin Huang Guohui Fan Zhibo Liu Lianhan Shang Fei Zhou Yeming Wang Jiapei Yu Luning Yang Ke Xie Zhisheng Huang Lixue Huang Xiaoying Gu Hui Li Yi Zhang Yimin Wang Frederick G.Hayden Peter W.Horby Bin Cao Chen Wang 2020Frontiers of Medicine2020,14,5:2
7Pliocene charcoals from Shanxi Province of China and their application to studies of prehistoric wildfires显示文摘Charcoals collected from the middle-late Pliocene sediments of the Taigu Basin,Shanxi Province,China,have been identified as Ulmus sp.(Ulmaceae),Prunus sp.,Maloidoxylon sp.(Rosaceae),and Maclura sp.(Moraceae).These taxa,along with the previously known fossils,indicate the occurrence of temperate climate and local wildfire at that time.Charcoals of trees and/or shrubs and the morphological changes of these charcoals demonstrate that crown fires and surface fires occurred in the Taigu Basin during the middle-late Pliocene.CHENG YeMing JIANG XiaoMei LI ChengSen WANG YuFei 2011Science China Earth Sciences2011,54,4:1
8Experimental Simulation and Verification of Position Servo Control of Mechanical Rodless Cylinder显示文摘In order to improve the position control accuracy of rodless cylinder,the valve control cylinder system based on pneumatic proportional servo is studied deeply.According to the working principle of the mechanical rodless cylinder control system,under the condition of uniform speed,the driving voltage of the proportional valve is changed to measure multiple sets of friction force and corresponding velocity data.Analyzed the physical structure of each component in pneumatic system,established the mathematical model of pneumatic system,and introduced MATLAB system identification toolbox to identify the parameters of the transfer function.and the experiment verifies its correctness.Yeming ZHANG Kaimin LI Hongwei YUE Shuangyang HE Dongyuan LI Kun LYU Feng WEI 2020Mechanical Engineering Science2020,2,2:1
9Geochemical and Sm-Nd isotopic characteristics of metabasites from central Hainan Island, south China and their tectonic significance显示文摘Li Xian-hua Zhou Hanwen Chung Sun-lin Ding Shijiang Liu Ying Lee Chi-Yu Ge Wenchun Zhang Yeming Zhang Renjie 2002Island Arc2002,11,3:1
10Adaptability of four-samples sensory tests and prediction of visual and near-infrared reflectance spectroscopy for Chinese indica rice显示文摘Lu Qingyun Chen Yeming Takashi Mikami Motonobu Kawano Li Zaigui 2006Journal of Food Engineering2006,,4:1
11Expression of Human Calcitonin by Microencapsulated Recombinant Myoblasts显示文摘Yeming Wang Bingfang Zeng Xiaolin Li 2006Biotechnology Letters2006,,18:1
12Research on Systematic Analysis and Countermeasures of the Buildings Construction Safety Problems显示文摘The buildings construction safety problems contain various safety-hidden dangers that caused by the human unsafe behaviors,the substance unsafe conditions,operation environment unsafe factors and management defects.The authors summarize comprehensively the problems of buildings construction safety in China at present based on grasping the whole safety status of buildings construction,and the synthetic countermeasures including the systems about laws,management,technology and education civilization for buildings construction safety management are brought up based on the viewpoint of safety system theory.Then it is thought that building scientific management mechanisms and popularizing effective management methods and measures are the fundamental ways for improving further the level of safety management for buildings construction in China at present.Shen Liangfeng Li Jie Fan Yeming 2008Engineering Sciences2008,6,1:1
13Study on roasting process of zircon-silica sol ceramic mould显示文摘Dry stock of silica sol ceramic mould was prepared by using of colloidal moulding technique with an optimized vacuum drying process.Effect of roasting process on the shrinkage rate and compressive strength of zircon-silica sol ceramic mould,and the relationship between the roasting temperature and microstructure of zircon-silica sol ceramic mould were studied.The optimum roasting temperature of zircon-silica sol ceramic mould gained by the experiments is 900℃ and the holding time is 2 h.The scanning electron microscope(SEM) observation showed the growth of refractory particles during the roasting process.The occurrence of sintering was observed in the zircon-silica sol ceramic mould when roasting temperature was above 1,000℃.Zhang Yeming Zeng Ming Hu Li Liu Xingang Zhang Congzheng 2011China Foundry2011,8,2:1
14Defective EMC1 drives abnormal retinal angiogenesis via Wnt/β-catenin signaling and may be associated with the pathogenesis of familial exudative vitreoretinopathy显示文摘Endoplasmic reticulum(ER)membrane protein complex(EMC)is required for the co-translational insertion of newly synthesized multi-transmembrane proteins.Compromised EMC function in different cell types has been implicated in multiple diseases.Using inducible genetic mouse models,we revealed defects in retinal vascularization upon endothelial cell(EC)specific deletion of Emc1,the largest subunit of EMC.Loss of Emc1 in ECs led to reduced vascular progression and vascular density,diminished tip cell sprouts,and vascular leakage.We then performed an unbiased transcriptomic analysis on human retinal microvascular endothelial cells(HRECs)and revealed a pivotal role of EMC1 in theβ-catenin signaling pathway.Further in-vitro and in-vivo experiments proved that loss of EMC1 led to compromisedβ-catenin signaling activity through reduced expression of Wnt receptor FZD4,which could be restored by lithium chloride(LiCl)treatment.Driven by these findings,we screened genomic DNA samples from familial exudative vitreoretinopathy(FEVR)patients and identified one heterozygous variant in EMC1 that co-segregated with FEVR phenotype in the family.In-vitro expression experiments revealed that this variant allele failed to facilitate the expression of FZD4 on the plasma membrane and activate theβ-catenin signaling pathway,which might be a main cause of FEVR.In conclusion,our findings reveal that variants in EMC1 gene cause compromisedβ-catenin signaling activity,which may be associated with the pathogenesis of FEVR.Shujin Li Mu Yang Rulian Zhao Li Peng Wenjing Liu Xiaoyan Jiang Yunqi He Erkuan Dai Lin Zhang Yeming Yang Yi Shi Peiquan Zhao Zhenglin Yang Xianjun Zhu 2023Genes & Diseases2023,10,6:1
15The Dynamics Study of Locomotive under Saturated Adhesion 显示文摘YAO Yuan ZHANG Hongjun LI Yeming 2011Vehicle SystemDynamics2011,49,8:1
16Variants in the Wnt co-receptor LRP6 are associated with familial exudative vitreoretinopathy显示文摘Familial exudative vitreoretinopathy(FEVR),an inherited eye disease,is characterized by abnormal retinal vascular development,such as neovascularization,vitreous hemorrhage,exudation,and retinal detachment(Criswick and Schepens,1969;Robitaille et al.,2002).FEVR is inherited as autosomal dominant,autosomal recessive,and X-linked patterns(de Crecchio et al.,1998).Shujin Li Mu Yang Yunqi He Xiaoyan Jiang Rulian Zhao Wenjing Liu Lulin Huang Yi Shi Xiao Li Kuanxiang Sun Yeming Yang Periasamy Sundaresan Peiquan Zhao Zhenglin Yang Xianjun Zhu 2022Journal of Genetics and Genomics2022,49,6:1
17Loss of Wtap results in cerebellar ataxia and degeneration of Purkinje cells显示文摘N^(6)-methyladenosine(m^(6)A)modification,which is achieved by the METTL3/METTL14/WTAP methyltransferase complex,is the most abundant internal mRNA modification.Although recent evidence indicates that m^(6)A can regulate neurodevelopment as well as synaptic function,the roles of m^(6)A modification in the cerebellum and related synaptic connections are not well established.Here,we report that Purkinje cell(PC)-specific WTAP knockout mice display early-onset ataxia concomitant with cerebellar atrophy due to extensive PC degeneration and apoptotic cell death.Loss of Wtap also causes the aberrant degradation of multiple PC synapses.WTAP depletion leads to decreased expression levels of METTL3/14 and reduced m^(6)A methylation in PCs.Moreover,the expression of GFAP and NF-L in the degenerating cerebellum is increased,suggesting severe neuronal injuries.In conclusion,this study demonstrates the critical role of WTAP-mediated m^(6)A modification in cerebellar PCs,thus providing unique insights related to neurodegenerative disorders.Yeming Yang Guo Huang Xiaoyan Jiang Xiao Li Kuanxiang Sun Yi Shi Zhenglin Yang Xianjun Zhu 2022Journal of Genetics and Genomics2022,49,9:1
18Environmental Risk Assessment of Chemical Projects——A Case Study of a Polystyrene Production Project显示文摘Taking a polystyrene production project as an example,according to Technical Guidelines for Environmental Risk Assessment of Construction Projects( HJ /T169-2004),we firstly identify the risk of substances and production process to determine the major source of danger,and then conduct source analysis and consequence prediction of the maximum credible accident,finally assess the environmental risk of the project and propose main risk management measures. The results reveal that the environmental risk of the project is acceptable,and it is suggested that some risk prevention and mitigation measures as well as contingency plans should be established.Yeming Li Xin Wang Tieli Xiang Wei Liu 2013Meteorological and Environmental Research2013,4,10:0
19Impact of corticosteroids on initiation and half-year durability of humoral response in COVID-19 survivors显示文摘Background:The impact of corticosteroids on humoral responses in coronavirus disease 2019(COVID-19)sur-vivors during the acute phase and subsequent 6-month period remains unknown.This study aimed to determine how the use of corticosteroids influences the initiation and duration of humoral responses in COVID-19 survivors 6 months after infection onset.Methods:We used kinetic antibody data from the lopinavir-ritonavir trial conducted at Jin Yin-Tan Hospital in January 2020,which involved adults hospitalized with severe COVID-19(LOTUS,ChiCTR2000029308).Anti-body samples were collected from 192 patients during hospitalization,and kinetic antibodies were monitored at all available time points after recruitment.Additionally,plasma samples were collected from 101 COVID-19 survivors for comprehensive humoral immune measurement at the half-year follow-up visit.The main focus was comparing the humoral responses between patients treated with systemic corticosteroid therapy and the non-corticosteroid group.Results:From illness onset to day 30,the median antibody titre areas under the receiver operating characteristic curve(AUCs)of nucleoprotein(N),spike protein(S),and receptor-binding domain(RBD)immunoglobulin G(IgG)were significantly lower in the corticosteroids group.The AUCs of N-,S-,and RBD-IgM as well as neutralizing antibodies(NAbs)were numerically lower in the corticosteroids group compared with the non-corticosteroid group.However,peak titres of N,S,RBD-IgM and-IgG and NAbs were not influenced by corticosteroids.During 6-month follow-up,we observed a delayed decline for most binding antibodies,except N-IgM(��−0.05,95%CI[−0.10,0.00])in the corticosteroids group,though not reaching statistical significance.No significant difference was observed for NAbs.However,for the half-year seropositive rate,corticosteroids significantly accelerated the decay of IgA and IgM but made no difference to N-,S-,and RBD-IgG or NAbs.Additionally,corticosteroids group showed a trend towards delayed viral clearance compared with the non-corticosteroid group,but the results were not statistically significant(adjusted hazard ratio 0.71,95%CI 0.50-1.00;P=0.0508).Conclusion:Our findings suggested that corticosteroid therapy was associated with impaired initiation of the antibody response but this did not compromise the peak titres of binding and neutralizing antibodies.Throughout the decay phase,from the acute phase to the half-year follow-up visit,short-term and low-dose corticosteroids did not significantly affect humoral responses,except for accelerating the waning of short-lived antibodies.Yeming Wang Li Guo Guohui Fan Yang Han Qiao Zhang Lili Ren Hui Zhang Geng Wang Xueyang Zhang Tingxuan Huang Weiyang Wang Lan Chen Lixue Huang Xiaoying Gu Xinming Wang Jingchuan Zhong Ying Wang Hui Li Jiapei Yu Zhibo Liu Chaolin Huang Bin Cao Jianwei Wang 2024Chinese Medical Journal Pulmonary and Critical Care Medicine2024,2,1:0
20Quantitative Analysis of Kruppel‑Like Factor 5‑Related Messenger RNA Transcripts in Ischemic Myocardium for Discrimination of Death Causes显示文摘Background:Accumulated studies have demonstrated that Kruppel‑like factor 5(KLF5),a transcription factor,plays an important role in regulating cell proliferation and tissue remodeling through the expression of its downstream genes.KLF5‑related factors are expected to be involved in the healing process after myocardial injury or myocardial ischemic changes,especially for the forensic diagnosis of myocardial ischemic physiopathology.Aim and Objectives:This study aimed to explore the discrimination ability and applicability of KLF5-related factors in SCD caused by MI compared with other causes of death to provide further insights into the forensic diagnosis of myocardial ischemic pathology.Materials and Methods:The relative quantification of F‑Box and WD Repeat Domain Containing 7(FBW7),KLF5,factor‑binding protein(FGFBP)1,and FGFBP2 messenger RNAs(mRNAs)in myocardial tissue samples was performed using real‑time fluorescence quantitative reverse transcription polymerase chain reaction.KLF5 and FGFBP1/2 protein levels were examined using immunohistochemistry(IHC).The forensic autopsy cases(27 in total,autopsy within 72 h postmortem)included seven cases of acute myocardial infarction and 10 cases of acute myocardial ischemia.There were 10 cases in the control group,including four cases of traffic injury one case of injury by fall from height,one case of electric death,and four cases of blunt force injury.Results:Characteristic results were found in myocardial samples from three groups of deaths:KLF5 and FGFBP1 mRNA levels were significantly elevated in the infarction and ischemia groups,while FBW7 mRNA levels were significantly decreased.FBW7 is an important ubiquitin ligase that can mediate the degradation of KLF5 protein.In addition,FBW7 and FGFBP2 mRNA levels were decreased in the infarction group compared with the ischemia group.The IHC results were consistent with the observed mRNA expression patterns.Conclusions:Quantitative detection of FBW7,KLF5,FGFBP1,and FGFBP2 mRNA transcripts in myocardial tissues supports the pathophysiological study of myocardial ischemic diseases and provides molecular pathological evidence for forensic discrimination of death causes.Xingyu Ma Yeming Li Ya Xi Liyang Su Yuxing Tong Chun Wang Tianshui Yu Dong Zhao 2022Journal of Forensic Science and Medicine2022,8,4:0
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