检索结果-南通市图书馆

Effect of Ti and rare earth on microsegregation and large-sized precipitates of H13 steel

在线全文

学校读者我要写书评

暂无评论

Journal of Iron and Steel Research International 2021年第12期28卷 1591-1604页

作者： Fa Ji Rui Xu yu-long gao Qing-chao Tian Lu Wang Zhi-xia Xiao Fu-xing Yin School of Materials Science and Engineering Hebei University of TechnologyTianjin300130China Research Institute for Energy Equipment Materials Hebei University of TechnologyTianjin300130China State Key Laboratory of Advanced Special Steel&Shanghai Key Laboratory of Advanced Ferrometallurgy&School of Materials Science and Engineering Shanghai UniversityShanghai200444China

Large-sized precipitates are fatal to the thermal fatigue of H13 hot work die *** amounts of Ti and/or rare earth(RE)were added in H13 steel during electroslag remelting to improve the element segregation and refine the large-sized *** results show that as Ti content increases from 0.0032 to 0.057 wt.%,the segregation of Cr,Mo and V becomes more severe.V-rich M(C,N)carbides are shorter,and their branches are denser in 3D ***,the number density of V-rich M(C,N)carbides with a size less than 2μm increases and that with other sizes *** addition,Ti-rich MN nitrides with the size greater than 4μm increases significantly at high Ti *** RE content increases from 0.0051 to 0.036 wt.%,the segregation of main alloying elements is first weakened and then *** with that in RE-free H13 steel,V-rich M(C,N)carbides are less developed in 3D observation,and the change in number density is similar to that of Ti-modified *** composite modification of 0.024 wt.%Ti and 0.011 wt.%RE,the segregation of alloying element and V-rich M(C,N)carbides are not significantly improved.

关键词： H13 steel Segregation Primary carbide Ti Rare earth Precipitate

An efficient TILLING platform for cultivated tobacco

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Integrative Plant Biology 2020年第2期62卷 165-180页

作者： yu-long gao Xue-Feng Yao Wen-Zheng Li Zhong-Bang Song Bing-Wu Wang yu-Ping Wu Jun-Li Shi Guan-Shan Liu Yong-Ping Li Chun-Ming Liu Key Laboratory of Tobacco Biotechnological Breeding National Tobacco Genetic Engineering Research CenterYunnan Academy of Tobacco Agricultural SciencesKunming 650021China Key Laboratory of Plant Molecular Physiology Institute of Botanythe Chinese Academy of SciencesBeijing 100093China The University of Chinese Academy of Sciences Beijing 100049China Tobacco Research Institute the Chinese Agriculture Academy of SciencesQingdao 266101China Institute of Crop Sciences the Chinese Academy of Agricultural SciencesBeijing 100081China

Targeting-induced local lesions in genomes(TILLING)is a powerful reverse-genetics tool that enables high-throughput screening of genomic variations in *** TILLING has been developed for many diploid plants,the technology has been used in very few polyploid species due to their genomic ***,we established an efficient capillary electrophoresis-based TILLING platform for allotetraploid cultivated tobacco(Nicotiana tabacum L.)using an ethyl methanesulfonate(EMS)-mutagenized population of 1,536 *** optimized the procedures for endonuclease preparation,leaf tissue sampling,DNA extraction,normalization,pooling,PCR amplification,heteroduplex formation,and capillary *** a test screen using seven target genes with eight PCR fragments,we obtained 118 *** mutation density was estimated to be approximately one mutation per 106kb on *** analyses showed that mutations in two heavy metal transporter genes,HMA2S and HMA4T,led to reduced accumulation of cadmium and zinc,which was confirmed independently using CRISPR/Cas9 to generate knockout *** results demonstrate that this powerful TILLING platform(available at http://***)can be used in tobacco to facilitate functional genomics applications.

关键词： An efficient TILLING platform cultivated tobacco HMA

Clinical efficacy of different treatments and their impacts on the quality of life of octogenarians with coronary artery disease

在线全文

学校读者我要写书评

暂无评论

Chinese Medical Journal 2019年第22期132卷 2657-2663页

作者： Xiang-yu Wu Tao Ying Cheng-Qian Yin Su Wang yu-long gao yu-Tong Cheng Zhao Li Zhi-Zhong Li Department of Cardiology Ward 5 Beijing Anzhen HospitalCapital Medical UniversityBeijing 100029China

Background:Coronary artery disease(CAD)in octogenarians(age of>80 years)has a high risk of mortality and high *** shows that the prevalence of CAD is higher among octogenarians than that among younger people,but few such patients undergo percutaneous coronary intervention(PCI)or coronary artery bypass grafting(CABG).This study aimed to evaluate different treatments w让h respect to their clinical effects and impacts on quality of life of octogenarians with ***:Data of 519 octogenarians with CAD consecutively treated at Beijing Anzhen Hospital,Capital Medical University(Beijing,China)from January 2010 to January 2016 were collected in this *** patients were categorized into three groups based on the treatments they received:the PCI group(n=292),CABG group(n=110),and medical treatment group(n=117).The followings were recorded during follow-up:clinical data,death(all-cause and cardiovascular-related),re-hospitalization time,Seattle Angina Questionnaire(SAQ)score,and occurrence of hemorrhagic events(cerebral bleeding,gastrointestinal bleeding,and dermal ecchymosis).Results:The median follow-up duration was 25.0(25th,75th percentile:17.0,55.5)months among 417 *** all-cause death rates(28.2%vs.12.0%and 14.6%,respectively)and cardiovascular-related death rates(15.4%us.3.8%and 6.4%,respectively)were significantly higher in the medical treatment group than those in the PCI group and CABG group(all P<0.05).The re-hospitalization rate for cardiovascular events was significantly lower in the CABG group than those in the PCI group and medical treatment group(3.8%vs.12.8%and 14.9%,respectively)(x^2=8.23&P=0.018).The SAQ scores of physical limitation,angina frequency,treatment satisfaction,and disease perception were significantly higher in the PCI group and CABG group than those in the medical treatment group(all P<0.05).No significant difference in the angina stability score was observed among the three groups(F=3.179,P=0.204).Conclusion:PCI an

关键词： Coronary artery disease Octogenarian Percutaneous coronary intervention Coronary artery bypass graft Death Life quality

A sample of metal-poor galaxies identified from the LAMOST spectral survey

在线全文

学校读者我要写书评

暂无评论

Research in Astronomy and Astrophysics 2017年第5期17卷 17-30页

作者： yu-long gao Jian-Hui Lian Xu Kong Ze-Sen Lin Ning Hu Hai-Yang Liu En-Ci Wang Zi-Huang Cao Yong-Hui Hou yue-Fei Wang Yong Zhang CAS Key Laboratory for Research in Galaxies and Cosmology Department of Astronomy University of Scienceand Technology of China Hefei 230026 China School of Astronomy and Space Science University of Science and Technology of China Hefei 230026 China Key Laboratory of Optical Astronomy National Astronomical Observatories Chinese Academy of SciencesBeijing 100012 China Nanjing Institute of Astronomical Optics & Technology National Astronomical Observatories Chinese Academyof Sciences Nanjing 210042 China

We present a sample of 48 metal-poor galaxies at z 〈 0.14 selected from 92 510 galaxies in the LAMOST survey. These galaxies are identified by their detection of the auroral emission line[OⅢ]λ4363 above the 3σ level, which allows a direct measurement of electron temperature and oxygen abundance. The emission line fluxes are corrected for internal dust extinction using the Balmer decrement method. With electron temperature derived from [OⅢ]λλ4959, 5007/[OⅢ]λ4363 and electron density from [SⅡ]λ6731/[SⅡ]λ6717, we obtain the oxygen abundances in our sample which range from 12 ＋ log（O/H） = 7.63（0.09 Z_⊙） to 8.46（0.6 Z_⊙）. We find an extremely metal-poor galaxy with 12 ＋ log（O/H） = 7.63 ± 0.01. With multiband photometric data from FUV to NIR and Hαmeasurements, we also determine the stellar masses and star formation rates, based on the spectral energy distribution fitting and Hα luminosity, respectively. We find that our galaxies have low and intermediate stellar masses with 6.39 ≤ log（M/M_⊙） ≤ 9.27, and high star formation rates（SFRs） with-2.18 ≤ log（SFR/M_⊙yr^（-1）） ≤ 1.95. We also find that the metallicities of our galaxies are consistent with the local T_e-based mass-metallicity relation, while the scatter is about 0.28 dex. Additionally,assuming the coefficient of α = 0.66, we find most of our galaxies follow the local mass-metallicity-SFR relation, but a scatter of about 0.24 dex exists, suggesting the mass-metallicity relation is weakly dependent on SFR for those metal-poor galaxies.

关键词： galaxies: abundances -- galaxies: evolution -- galaxies: starburst -- star formation

Unfractionated Heparin with Sequential Enoxaparin in Patients with Complex Coronary Artery Lesions during Percutaneous Coronary Intervention

在线全文

学校读者我要写书评

暂无评论

Chinese Medical Journal 2018年第20期131卷 2417-2423页

作者： Zhi-Zhong Li Ying Tao Su Wang Cheng-Qian Yin yu-long gao yu-Tong Cheng Zhao Li Chang-Sheng Ma Department of Cardiology Beijing Anzhen Hospital Capital Medical University Beijing Institute of Heart Lung and Blood Vessel Diseases Beijing 100029 China

Background： Unfractionated heparin （UFH）, despite its limitations, has been used as the primary anticoagulant alternative during the percutaneous coronary intervention （PCI）. Some studies indicated that intravenous enoxaparin could be an effective and safe option. Our team used enoxaparin alone at one time according to the guidelines （Class IIA） and found a little catheter thrombosis during PCI. We recommend a new anticoagulation strategy using enoxaparin in combination with UFH. Enoxaparin has a more predictable anticoagulant response with no need of repeatedly monitoring anticoagulation during PCI. This retrospective study aimed to evaluate the efficacy and safety of using enoxaparin in combination with UFH in PCI patients with complex coronary artery disease. Methods： Between January 2015 and April 2017, 600 PCI patients who received intravenous UFH at an initial dose of 3000 U plus intravenous enoxaparin at a dose of 0.75 mg/kg （observation group） and 600 PCI patients who received UFH at a dose of 100 U/kg （control group） were consecutively included in this retrospective study. The endpoints were postoperative 48-h thrombolysis in myocardial infarction （TIMI） bleeding and transfusion and 30-day and l-year major adverse cardio-cerebrovascular events （MACCE）. Results： Baseline clinical, angiographic, and procedural characteristics were similar between groups, except there was less stent implantation per patient in the observation group （2.13 vs. 2.25 in the control group, P = 0.002）. TIMI bleeding （3.3% vs. 4.7%） showed no significant difference between the observation group and control group. During the 30-day follow-up, the rate of MACCE was 0.9% in the observation group and 1.5% in the control group. There was no significant difference in the rates of MACCE, death, myocardial infarction, target vessel revascularization, cerebrovascular event, and angina within 30 days and 1 year after PC1 between groups as well as in the subgroup analysis of transfemoral approa

关键词： Complex Coronary Heart Disease Enoxaparin Percutaneous Coronary Intervention Unfractionated Heparin

Optimization Strategies of Na_(3)V_(2)(PO_(4))_(3) Cathode Materials for Sodium‑Ion Batteries

在线全文

学校读者我要写书评

暂无评论

Nano-Micro Letters 2025年第2期17卷 204-251页

作者： Jiawen Hu Xinwei Li Qianqian Liang Li Xu Changsheng Ding yu Liu Yanfeng gao School of Materials Science and Engineering Shanghai UniversityShanghai 200444People’s Republic of China Shanghai Institute of Ceramics Chinese Academy of SciencesShanghai 200050People’s Republic of China

Na_(3)V_(2)(PO_(4))_(3)(NVP)has garnered great attentions as a prospective cathode material for sodium-ion batteries(SIBs)by virtue of its decent theoretical capacity,superior ion conductivity and high structural ***,the inherently poor electronic conductivity and sluggish sodium-ion diffusion kinetics of NVP material give rise to inferior rate performance and unsatisfactory energy density,which strictly confine its further application in ***,it is of significance to boost the sodium storage performance of NVP cathode *** to now,many methods have been developed to optimize the electrochemical performance of NVP cathode *** this review,the latest advances in optimization strategies for improving the electrochemical performance of NVP cathode material are well summarized and discussed,including carbon coating or modification,foreign-ion doping or substitution and nanostructure and morphology *** foreign-ion doping or substitution is highlighted,involving Na,V,and PO_(4)^(3−)sites,which include single-site doping,multiple-site doping,single-ion doping,multiple-ion doping and so ***,the challenges and prospects of high-performance NVP cathode material are also put *** is believed that this review can provide a useful reference for designing and developing high-performance NVP cathode material toward the large-scale application in SIBs.

关键词： Sodium-ion batteries Na_(3)V_(2)(PO_(4))_(3) Cathode materials Electrochemical performance Optimization strategies

An Unprecedented Efficiency with Approaching 21%Enabled by Additive‑Assisted Layer‑by‑Layer Processing in Organic Solar Cells

在线全文

学校读者我要写书评

暂无评论

Nano-Micro Letters 2025年第2期17卷 372-375页

作者： Shuai Xu Youdi Zhang Yanna Sun Pei Cheng Zhaoyang Yao Ning Li long Ye Lijian Zuo Ke gao Key Laboratory of Advanced Green Functional Materials College of ChemistryChangchun Normal UniversityChangchun 130032People’s Republic of China Shandong Provincial Key Laboratory for Science of Material Creation and Energy Conversion School of Chemistry and Chemical EngineeringShandong UniversityQingdao 266237People’s Republic of China College of Polymer Science and Engineering Sichuan UniversityChengdu 610065People’s Republic of China State Key Laboratory and Institute of Elemento‑Organic Chemistry Centre of Nanoscale Science and Technology and Key Laboratory of Functional Polymer MaterialsRenewable Energy Conversion and Storage Center(RECAST)College of ChemistryNankai UniversityTianjin 300071People’s Republic of China Institute of Polymer Optoelectronic Materials and Devices State Key Laboratory of Luminescent Materials and Devices South China University of TechnologyGuangzhou 510640People’s Republic of China Tianjin Key Laboratory of Molecular Optoelectronic Sciences School of Materials Science and EngineeringTianjin UniversityTianjin 300350People’s Republic of China State Key Laboratory of Silicon Materials MOE Key Laboratory of Macromolecular Synthesis and FunctionalizationDepartment of Polymer Science and EngineeringZhejiang UniversityHangzhou 310027People’s Republic of China

Recently published in Joule,Feng Liu and colleagues from Shanghai Jiaotong University reported a record-breaking 20.8%power conversion efficiency in organic solar cells(OSCs)with an interpenetrating fibril network active layer morphology,featuring a bulk p-in structure and proper vertical segregation achieved through additive-assisted layer-by-layer *** optimized hierarchical gradient fibrillar morphology and optical management synergistically facilitates exciton diffusion,reduces recombination losses,and enhances light capture *** approach not only offers a solution to achieving high-efficiency devices but also demonstrates the potential for commercial applications of OSCs.

关键词： Organic solar cells Additive-assisted layer-by-layer processing Three-dimensional fibril morphology Bulk p-i-n structure Optical management

Small extracellular vesicles derived from human induced pluripotent stem cell-differentiated neural progenitor cells mitigate retinal ganglion cell degeneration in a mouse model of optic nerve injury

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2025年第2期20卷 587-597页

作者： Tong Li Hui-Min Xing Hai-Dong Qian Qiao gao Sheng-Lan Xu Hua Ma Zai-long Chi State Key Laboratory of Ophthalmology Optometry and Visual ScienceEye HospitalWenzhou Medical UniversityWenzhouZhejiang ProvinceChina National Clinical Research Center for Ocular Diseases Eye HospitalWenzhou Medical UniversityWenzhouZhejiang ProvinceChina

Several studies have found that transplantation of neural progenitor cells(NPCs)promotes the survival of injured ***,a poor integration rate and high risk of tumorigenicity after cell transplantation limits their clinical *** extracellular vesicles(sEVs)contain bioactive molecules for neuronal protection and *** studies have shown that stem/progenitor cell-derived sEVs can promote neuronal survival and recovery of neurological function in neurodegenerative eye diseases and other eye *** this study,we intravitreally transplanted sEVs derived from human induced pluripotent stem cells(hiPSCs)and hiPSCs-differentiated NPCs(hiPSC-NPC)in a mouse model of optic nerve *** results show that these intravitreally injected sEVs were ingested by retinal cells,especially those localized in the ganglion cell *** with hiPSC-NPC-derived sEVs mitigated optic nerve crush-induced retinal ganglion cell degeneration,and regulated the retinal microenvironment by inhibiting excessive activation of *** analysis further revealed that hiPSC-NPC derived sEVs transported neuroprotective and anti-inflammatory miRNA cargos to target cells,which had protective effects on RGCs after optic nerve *** findings suggest that sEVs derived from hiPSC-NPC are a promising cell-free therapeutic strategy for optic neuropathy.

关键词： exosome miRNA neural progenitor cell neurodegeneration neuroinflammation neuroprotection optic nerve crush optic neuropathy retinal ganglion cell small extracellular vesicles

Observation of acoustic hybrid topological phases induced by the p-d orbital interactions

在线全文

学校读者我要写书评

暂无评论

Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 132-139页

作者： Xiao Xiang Feng gao yu-Gui Peng Peng Wu Zong-Lin Li Xue-Feng Zhu School of Physics and Innovation Institute Huazhong University of Science and Technology

In spinless systems,growing attention has recently been attracted to synthetic gauge fields,which redefine the fundamental crystal symmetries by utilizing the projective algebraic ***,synthetic gauge fields have been commonly investigated in single orbital systems,and explorations on hybrid orbitals remain elusive in ***,we report the experimental observation of hybrid topological phases induced by hybrid synthetic gauge flux,which is formed by the interaction between p and d orbitals embedded in acoustic *** breaking the translation symmetries of Lxand/or Ly,we unambiguously demonstrate the first-order M?bius edge states and higher-order corner *** work establishes a platform for seeking exotic topological phases induced by hybrid-orbitals interactions and initializing the framework of hybrid-orbitalsrelated topological *** applications can be anticipated in scenarios such as high-quality sensing and robust wave trapping due to the stepwise energy distribution of the hybrid topological phase.

关键词： topological insulator synthetic gauge field projective symmetry corner states