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| 1 | Pathological evidence for residual SARS-CoV-2 in pulmonary tissues of a ready-for-discharge patient显示文摘Dear Editor,SARS-CoV-2,a novel coronavirus and causing COVID-19,has given rise to a worldwide pandemic.1,2 So far,tens of thousands of COVID-19 patients have been clinically cured and discharged,but multiple COVID-19 cases showed SARS-CoV-2 positive again in discharged patients,3 which raises an attention for the discharged patients.Also,there is an urgent need to understand the pathogenesis of SARS-CoV-2 infection.Here,we conducted postmortem pathologic study in a ready-fordischarge COVID-19 patient who succumbed to sudden cardiovascular accident.Pathological examination revealed SARSCoV-2-viruses remaining in pneumocytes and virus-caused pathological changes in the lungs.Our study provided new insights into SARS-CoV-2 pathogenesis and might facilitate the improvement of clinical guideline for virus containment and disease management. | Xiao-Hong Yao Zhi-Cheng He Ting-Yuan Li Hua-Rong Zhang Yan Wang Huaming Mou Qiaonan Guo Shi-Cang Yu Yanqing Ding Xindong Liu Yi-Fang Ping Xiu-Wu Bian | 2020 | Cell Research2020，30，6： | 35 |
| 2 | Celastrus orbiculatus extract induces mitochondrial-mediated apoptosis in human hepatocellular carcinoma cells显示文摘OBJECTIVE:To investigate the apoptotic effects and underlying molecular mechanisms of Celastrus orbiculatus(C.orbiculatus) extract in human hepatocellular carcinoma cells.METHODS:Human hepatocellular carcinoma cells(HCCLM6) were treated with C.orbiculatus extract(COE) at different nontoxic concentrations(10,20,40,80,and 160 μg/mL).The effect of COE on HC-CLM6 viability was examined using 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl tetrazolium bromide(MTT) assays.Cellular apoptosis following COE treatment was assessed by flow cytometry and western blot analysis.RESULTS:COE significantly inhibited cell viability and induced apoptosis of HCCLM6 cells in a dose-dependent manner.Apoptosis was accompanied by increased Bax expression and decreased Bcl-2 expression.In addition,COE treatment led to the release of cytochrome c,activation of caspase-3,and cleavage of poly(ADP-ribose) polymerase(PARP).Furthermore,activation of extracellular signal-regulated kinase(ERK),p38 kinase,and c-Jun N-terminal kinase(JNK) phosphorylation,and down-regulation of Akt phosphorylation was observed.CONCLUSION:COE induces mitochondrial-mediated,caspase-dependent apoptosis in HCCLM6 cells,which might be attributed to the activation of mitogen-activated protein kinase(MAPK) and inhibition of Akt signaling pathways.These data suggest that COE may be a potential treatment for human hepatocellular carcinoma. | Hua Zhang Yayun Qian Yanqing Liu Guoqing Li Pingfang Cui Yaodong Zhu Hui Ma Xue Ji Shiyu Guo Hisamits Tadashi | 2012 | Journal of Traditional Chinese Medicine2012，32，4： | 18 |
| 3 | miR-181b functions as an oncomiR in colorectal cancer by targeting PDCDZ显示文摘 | Yanqing Liu Uzair-ur-Rehman Yu Guo Hongwei Liang Rongjie Cheng Fei Yang Yeting Hong Chihao Zhao Minghui Liu Mengchao Yu Xinyan Zhou Kai Yin Jiangning Chen Junfeng Zhang Chen-Yu Zhang Feng Zhi Xi Chen | 2016 | Protein & Cell2016，7，10： | 14 |
| 4 | Strengthening FCC-CoCrFeMnNi high entropy alloys by Mo addition显示文摘In order to strengthen the face-centered-cubic(FCC) type CoCrFeMnNi high entropy alloys(HEAs), different contents of Mo(0–16 at.%, similarly hereinafter) were alloyed. Phase evolution, microstructure,mechanical properties and related mechanism of these HEAs were systematically studied. The results show that sigma phase is appeared with addition of Mo, and the volume fraction of it increases gradually from 0 to 66% with increasing Mo content. It is found that Mo is enriched in sigma phase, which indicates that Mo element is beneficial to form sigma phase. Compressive testing shows that the yield strength of the alloys increases gradually from 216 to 765 MPa, while the fracture strain decreases from 50%(no fracture) to 19% with increasing of Mo. The alloy exhibits the best compressive performance when Mo content reaches 11%, the yield strength, fracture strength and fracture strain are 547 MPa, 2672 MPa and44% respectively. The increased volume fraction of sigma phase plays an important role in improving the compressive strength of(CoCrFeMnNi)_(100-x)Mo_xHEAs. | Gang Qin Ruirun Chen Huiting Zheng Hongze Fang Liang Wang Yanqing Su Jingjie Guo Hengzhi Fu | 2019 | Journal of Materials Science & Technology2019，35，4： | 11 |
| 5 | Effect of Traveling Magnetic Field on Mould-Filling Length of the A357 Melt during Casting Thin Walled Plate显示文摘In order to improve the mould filling ability, the method for production of thin-walled castings in the travelingmagnetic field was applied. The relationship between magnetic field density and input voltage as well as distancewas investigated, and the mould filling length of A357 melt has been studied. The electromagnetic forcesappliedon the melt were also analyzed. The result shows that the mould-filling length of the melt increase rapidly with theincrease of magnetic flux density. The mould filling lengths in gypsum upper mould and magnetic material uppermould were compared from the standpoint of application. It demonstrated that the steel upper mould is superior togypsum mould. | Tiejun ZHANG, Jingjie GUO, Yanqing SU, Hongsheng DING, Weisheng BI, Jim JIA and Hengzhi FUSchool of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China | 2003 | Journal of Materials Science & Technology2003，19，1： | 8 |
| 6 | Microstructures and mechanical properties of Nb-alloyed CoCrCuFeNi high-entropy alloys显示文摘Nb has a positive effect on improving the mechanical properties of metal materials, and it is expected to strengthen CoCrCuFeNi high-entropy alloys(HEAs) with outstanding ductility and relatively weak strength. In this paper, the alloying effects of Nb on the microstructural evolution and the mechanical properties of the(CoCrCuFeNi)_(100-x)Nb_xHEA were investigated systematically. The result shows that Nb promotes the phase transition from FCC(face-centered cubic) to Laves phase, and the volume fractions of Laves phase increase from 0% to 58.2% as the Nb content increases. Compressive testing shows that the addition of Nb has a positive effect on improving the strength of CoCrCuFeNi HEA. The compressive yield strength of(CoCrCuFeNi)_(100-x)Nb_xHEAs increases from 338 MPa to 1322 MPa and the fracture strain gradually reduces from 60.0%(no fracture) to 8.1% as the Nb content increases from 0 to 16 at.%. The volume fraction increase of hard Laves phase is the key factor for the strength increase, and the reduction of the VEC(valence electron concentration) value induced by the addition of Nb is beneficial for the increase of the Laves phase content in these alloys. | Gang Qin Shu Wang Ruirun Chen Xue Gong Liang Wang Yanqing Su Jingjie Guo Hengzhi Fu | 2018 | Journal of Materials Science & Technology2018，34，2： | 8 |
| 7 | Lamellar orientation control in directionally solidified TiAl intermetallics显示文摘TiAl-based alloys are potentially used as high-temperature structural materials with a high specific strength in the range of^900°C.However,the mechanical properties of TiAl-based alloys are extremely anisotropic with respect to the lamellar orientation of the microstructures.A balance combination of room-temperature ductility and strength can be achieved when the lamellar orientation are aligned parallel to the tensile stress direction.Lamellar orientation control of TiAl-based alloys by directional solidification technique has been widely studied in recent years.Two different directional solidification processes can be used to modify the lamellar orientation.One is a seeding technique and the other is adjusting the solidification path.This paper reviews the principles of the two methods and their progress.The influence of alloy composition and solidification parameters on lamellar orientation control is also discussed. | Su Yanqing Liu Tong Li Xinzhong Chen Ruirun Ding Hongsheng Guo Jingjie Fu Hengzhi | 2014 | China Foundry2014，11，4： | 7 |
| 8 | Efficacy and safety of the Qiguiyin formula in severe pneumonia: study protocol for a randomized, double-blind, placebo-controlled clinical trial显示文摘OBJECTIVE: To evaluate the clinical efficacy and safety of Qiguiyin(QGY) formula in patients with severe pneumonia in China compared with a placebo.METHODS: This is a multicenter double-blind, placebo-controlled, randomized clinical trial with two parallel arms. There will be 530 patients enrolled and randomized into either the experimental group(QGY formula) or the control group(placebo). Therapies for patients in the two groups above will be based on the conventional therapy. The primary outcome is 28-day mortality. Secondary outcomes include:(a) duration of hospital stay;(b) duration of time in the intensive care unit(ICU) stays;(c) duration of mechanical ventilation;(d) antibiotic DDD value(which means the doses of antibotics during the treatment period);(e) serum procalcitonin(PCT) level;(f) serum C-reactive protein(CRP)level;(g) Pneumonia severity index(PSI) score;(h)Sequential Organ Failure Assessment(SOFA) score;(i) sputum culture results;(j) blood routine examination results;(k) routine urine test results;(l) stool routine examination results;(m) electrocardiogram results;(n) alanine aminotransferase levels;(o) aspartate amino transferase levels;(p) total bilirubin;(q) creatinine levels;(r) urea nitrogen levels;and(s)adverse events.ETHICS AND DISSEMINATION: The protocol has been approved by the Research Ethics Committee of Beijing Hospital of Traditional Chinese Medicine,Affiliated with Capital Medical University(2018 BL-053-02). This trial aims to provide evidence for QGY formula combined with conventional therapy in treating patients with severe bacterial pneumonia,and to verify the clinical effectiveness and safety of QGY formula in China compared with placebo. Additionally, this trial will reveal the effect of QGY formula on delaying/reversing the characteristics of drug-resistant bacteria.Trial registration number: Chi CTR1800019785. | Huang Po Guo Yuhong Zhao Jingxia Li Bo Wu Yanqing Liu Qingquan | 2020 | Journal of Traditional Chinese Medicine2020，40，2： | 6 |
| 9 | The corrosion behavior of Ti-6Al-3Nb-2Zr-1Mo alloy:Effects of HCl concentration and temperature显示文摘Investigation about the corrosion behavior of Ti alloys in different ambient environment is of great significance for their practical application.Herein,we systematically investigate the corrosion behavior of a newfound Ti-6 Al-3 Nb-2 Zr-1 Mo(Ti80)alloy in hydrochloric acid(HCl)ranging from 1.37 to 7 M,and temperature ranging from 25 to 55℃,by means of electrochemical measurements,static immersion tests and surface analysis.Results manifest that increasing either HCl concentration or temperature can accelerate the corrosion of Ti80 alloy via promoting the breakdown of native protective oxide film and then further facilitating the active dissolution of Ti80 matrix.According to potentiodynamic polarization curves,Ti80 alloy displays a spontaneous passive behavior in 1.37 M HCl at 25℃,compared to a typical active-passive behavior under the other conditions.As indicated by cathodic Tafel slope,the rate determining step for cathodic hydrogen evolution reaction is likely the discharge reaction step.The apparent activation energies obtained from corrosion current density and maximum anodic current density for Ti80 alloy in 5 M HCl solution are 62.4 and 55.6 kJ mol-1,respectively,which signifies that the rate determining step in the corrosion process of Ti80 alloy is mainly determined by surface-chemical reaction rather than diffusion.Besides,the electrochemical impedance spectroscopy tests demonstrate that a stable and compact oxide film exists in 1.37 M HCl at 25℃,whereas a porous corrosion product film forms under the other conditions.Overall,the critical HCl concentration at which Ti80 alloy can maintain passivation at 25℃can be determined as a value between 1.37 and 3 M.Furthermore,the corroded surface morphology characterization reveals that equiaxedαphase is more susceptible to corrosion compared to intergranularβphase due to a lower content of Nb,Mo,and Zr in the former. | Baoxian Su Binbin Wang Liangshun Luo Liang Wang Yanqing Su Fuxin Wang Yanjin Xu Baoshuai Han Haiguang Huang Jingjie Guo Hengzhi Fu | 2021 | Journal of Materials Science & Technology2021，，15： | 5 |
| 10 | Annealed microstructure dependent corrosion behavior of Ti-6Al-3Nb-2Zr-1Mo alloy显示文摘Corrosion resistance of titanium(Ti)alloys is closely connected with their microstructure which can be adjusted and controlled via different annealing schemes.Herein,we systematically investigate the specific effects of annealing on the corrosion performance of Ti-6 Al-3 Nb-2 Zr-1 Mo(Ti80)alloy in 3.5 wt.%NaCl and 5 M HCl solutions,respectively,based on open circuit potential(OCP),potentiodynamic polarization,electrochemical impedance spectroscopy(EIS),static immersion tests and surface analysis.Results indicate that increasing annealing tempe rature endows Ti80 alloy with a higher volume fraction ofβphase and finerαphase,which in turn improves its corrosion resistance.Surface characterization demonstrates thatβphase is more resistant to corrosion thanαphase owing to a higher content of Nb,Mo,and Zr in the former;additionally,the decreased thickness of a phase alleviates segregation of elements to further restrain the micro-galvanic couple effects betweenαandβphases.Meanwhile,the influential mechanisms of environmental conditions on corrosion of Ti80 alloy are discussed in detail.As the formation of a highly compact and stable oxide film on surface,annealed Ti80 alloys exhibit a low corrosion current density(10^(-6)A/cm^(2))and high polarization impedance(10^(6)Ω·cm^(2))in 3.5 wt.%NaCl solution.However,they suffer severe corrosion in 5 M HCl solution,resulting from the breakdown of native oxide films(the conversion of TiO_(2)to aqueous Ti^(3+)),active dissolution of substrate Ti to aqueous Ti^(3+)and existence of micro-galvanic couple effects.Those findings could provide new insights to designing Ti alloys with high-corrosion resistance through microstructural optimization. | Baoxian Su Liangshun Luo Binbin Wang Yanqing Su Liang Wang Robert O.Ritchie Enyu Guo Ting Li Huimin Yang Haiguang Huang Jingjie Guo Hengzhi Fu | 2021 | Journal of Materials Science & Technology2021，，3： | 5 |
| 11 | Optimizing microstructure,shrinkage defects and mechanical performance of ZL205A alloys via coupling travelling magnetic fields with unidirectional solidification显示文摘ZL205A alloys tend to form disordered and defective microstructure due to the large solidification intervals and multi-phase.Accordingly,finding ways to effectively optimize the microstructure and mechanical performance is of great significance.In this regard,the coupling of travelling magnetic fields(TMF)with unidirectional solidification was used to continuously regulate the mushy zones of ZL205A alloys.Additionally,experiments are combined with simulations to systematically reveal the mechanisms on the optimizations at each stage of solidification process.Current findings demonstrate that different directional strong melt flows generated by TMF are responsible for these optimizations.Additionally,the effects of TMF on microstructure are different at each stage of solidification process.Specifically,downward TMF coupled with unidirectional solidification can refine and uniform the microstructure,decrease the formation of precipitation,promote the growth consistency of matrix phaseα-Al growing along the<001>crystal orientation,reduce the secondary dendrites and overlaps between dendrites,eliminate the shrinkage defects,and increase the ultimate tensile strength,yield strength,elongation and hardness from 198.3 MPa,102.2 MPa,7.5%and 82.3 kg mm^(-2)without TMF to 225.5 MPa,116.1 MPa,13.6%and 105.2 kg mm^(-2).Contrastively,although upward TMF can reduce Al3Ti and refineα-Al,it increases the formation of Al6Mn,Al2Cu,secondary dendrites,overlaps between dendrites,and shrinkage defects;then it deflects and disorders the growth ofα-Al,further to decrease the overall performance of alloys. | Lei Luo Liangshun Luo Yanqing Su Lin Su Liang Wang Jingjie Guo Hengzhi Fu | 2021 | Journal of Materials Science & Technology2021，，15： | 4 |
| 12 | Influence of silicide on fracture behavior of a fully lamellar Ti-46Al-0.5W-0.5Si alloy显示文摘The fracture behavior of fully lamellar binaryγ-TiAl alloys is extremely anisotropic with respect to the lamellar orientation.For the fully lamellar Ti-46Al-0.5W-0.5Si alloy,the existence of silicide clusters plays a critical role on the fracture behavior.In the present study,tensile test and three point bending test were performed at room temperature with the loading axis parallel and perpendicular to the lamellar orientation,respectively.To investigate the influence of silicide clusters on the initiation and propagation of cracks,the fracture surface and the cracks adjacent to the fracture zone of the specimens have been analyzed.Results show that the fracture process is related to the morphology and distribution of the silicide clusters.Crack preferentially initiates at and propagates along the interface of silicide andα 2 /γlamellar with the loading axis perpendicular to the length direction of silicide.While the silicide can prevent the propagation of cracks from running across with the crack growth direction perpendicular to the length direction of silicide. | Chen Hui Su Yanqing Luo Liangshun Li Xinzhong Wang Zhantao Guo Jingjie Fu Hengzhi | 2012 | China Foundry2012，9，2： | 4 |
| 13 | As-cast structure refinement of Ti-46Al alloy by hafnium and boron additions显示文摘The influence of Hf and B on the solidifi cation structure of cast Ti-46Al alloys was investigated.The results show that the coupling effect of Hf and B changes the solidifi cation structure morphology and strongl ref ines the grain size.When the Hf+B contents were increased from 0 + 0.0 to 3 + 0.2,5 + 0.6 and 7 + 1.0(in at.%),the solidification structure morphology changed from coarse columnar dendrite to fine columnar dendrite then to equiaxed dendrite,and further to f ine near granular grain whilst the average grain size decreased to 20 μm It is concluded that the columnar dendrite refinement is due to the effect of Hf and B on the decrease of A diffusion coeffi cient in the melt.The f ine near granular grain formation is attributed to the combined constitutiona supercooling formed by Al and B segregation that is strengthened by Hf and B additions at the solid/liquid interface during solidifi cation,and the TiB2 precipitates acting as heterogeneous nuclei. | Zhang Li Su Yanqing Yang Huimin Luo Liangshun Guo Jingjie | 2009 | China Foundry2009，6，2： | 3 |
| 14 | Interface effects on the electroluminescence spectra in amorphous-Si/silicon oxynitride multilayer structures显示文摘We report room-temperature electroluminescence (EL) from as-deposited amorphous-Si/silicon oxynitride multilayer structure prepared by plasma enhanced chemical vapor deposition. We prepared 8-period a-Si/SiOxNy multilayer with thickness of 4 nm both for the Si and SiOxNy sublayers. The EL spectral profile exhibits some obviously modulated features upon the barrier material. By adjusting the nitride/oxygen ratio in the barrier layer, the EL peak position can be tuned from 750 nm to 695 nm. From the result of the Raman and Fourier transform infrared results, the EL is attributed to the radiative recombination of electrons and holes in luminescent centers related to the interface. The different interface characteristics induce the shift of EL peak position. | WANG Xiang HUANG Rui SONG Chao SONG Jie GUO YanQing | 2012 | Science China(Physics,Mechanics & Astronomy)2012，55，7： | 3 |
| 15 | ANALYSIS OF OVERFLOW CRITICAL VALUE FOR TiAl BASED ALLOY MELT DURING PROCESS OF CENTRIFUGAL CASTING显示文摘1INTRODUCTIONTiAlbasedaloyshaveatractedagreatdealofatentionbecauseoftheirpotentialyatractivepropertiesforhightemperaturestru... | Guo, Jingjie Sheng, Wenbin Su, Yanqing Ding, Hongsheng Jia, Jun | 1999 | 中国有色金属学会会刊:英文版1999，9，2： | 3 |
| 16 | Efect of growth rate on characteristic lengths of microstructure in directionally solidiied Ti-46Al-2Cr-2Nb-0.2B alloy显示文摘The microstructure of TiAl based alloys is sensitive to growth rates.In this paper,Bridgman directional solidification of Ti-46Al-2Cr-2Nb-0.2B(at.%)alloy was carried out at a constant temperature gradient(G)to investigate the effects of various growth rates(v)on characteristic lengths(primary dendritic arm spacing,secondary dendritic arm spacing and lamellar spacing)of the microstructure.Results show that under the experimental conditions of G=18 K·mm-1and v=15μm·s-1to 70μm·s-1,the primary phase of directionally solidified Ti-46Al-2Cr-2Nb-0.2B alloy isαphase,the values of primary dendritic arm spacing(λl),secondary dendritic arm spacing(λ2)and lamellar spacing(λla)decrease with the increase in growth rate.The results were compared with theoretical models and similar experimental results of TiAl based alloys.The Bouchard-Kirkaldy model agrees well with the relationship between primary dendritic arm spacing and growth rate obtained in the experiment;the relationship between them can be expressed byλl=758.6v-0.39.The relationship between the secondary dendritic arm spacing and the growth rate can be expressed byλ2=113.9v-0.45,while the relationship between the lamellar spacing and growth rate can be expressed byλla=22.88v-0.94. | Zhang Yuan Li Xinzhong Guo Jingjie Su Yanqing Fu Hengzhi | 2013 | China Foundry2013，10，5： | 3 |
| 17 | Influence of columnar grain boundary on fracture behavior of as-cast fully lamellar Ti-46Al-0.5W-0.5Si alloy显示文摘The fracture behavior of fully lamellar γ-TiAl alloys depends on the angle between the lamellar orientation and loading axis,but the role of the presentation of grain boundary cannot be ignored.To investigate the influence of the grain boundary on the initiation and propagation of cracks,the tensile test of the alloy was conducted at room temperature with loading axis parallel and perpendicular to the lamellar orientation,respectively.The cracks adjacent to the fracture zone of the tensile specimens have been investigated to analyze the fracture behavior.Results show that the grain boundary has dual influences on the fracture behavior.When the loading axis is parallel to the lamellar orientation,cracks are preferentially initiated at and propagate along the grain boundaries.When the loading axis is perpendicular to the lamellar orientation,the grain boundaries can prevent the propagation of cracks from running across.Additionally,serrated-shape grain boundaries have a better inhibiting effect on the propagation of cracks than planar boundaries. | Chen Hui Su Yanqing Luo Liangshun Li Xinzhong Liu Jiangping Guo Jingjie Fu Hengzhi | 2012 | China Foundry2012，9，1： | 3 |
| 18 | Recognition of Early Paleozoic Magmatisms in the Supposed Proterozoic Basements of Zhalantun, Great Xing’an Range, NE China显示文摘The Zhalantun terrane from the Xing’an massif, northeast China, was used to be considered as Proterozoic basements. However, amounts of detrital zircon ages from the meta-sedimentary rocks deny the existence of Precambrian basements recently. Notably, magmatic rocks were barely reported to limit the exact ages of the Zhalantun basements. In this study, we collected rhyolite, gabbro and quartz diorite for zircon in-situ U-Pb isotopic dating, which yield crystallization ages of ~505 Ma, ~447 Ma and ~125 Ma, respectively. Muscovite schist and siltstone define maximum depositional ages of ~499 Ma and ~489 Ma, respectively. Additionally, these dated supracrustal rocks and plutons also yield ancient detrital/xenocryst zircon ages of ~600-1000 Ma, ~1600-2220 Ma, ~2400 Ma, ~2600-2860 Ma. Based on the whole-rock major and trace element compositions, the ~505 Ma rhyolites display high SiO2 and alkaline contents, low Fe2O3T, TiO2 and Al2O3, and relatively high Mg O and Mg#, which exhibit calc-alkaline characteristics. These rhyolites yield fractionated REE patterns and negative Nb, Ta, Ti, Sr, P and Eu anomalies and positive Zr anomalies. The geochemistry, petrology and Lu-Hf isotopes imply that rhyolites were derived from the partial melting of continental basalt induced by upwelling of sub-arc mantle magmas, and then experienced fractional crystallization of plagioclase, which points to a continental arc regime. The ~447 Ma gabbros exhibit low Si O2 and alkaline contents, high Fe2 O3 T, Ti O2, Mg O and Mg#. They show minor depletions of La and Ce, flat MREE and HREE patterns, and negative Nb, Ta, Zr and Hf anomalies. Both sub-arc mantle and N-MORB-like mantle were involved in the formation of the gabbros, indicative of a probable back-arc basin tectonic setting. Given that, the previously believed Proterozoic supracrustal rocks and several plutons from the Zhalantun Precambrian basements were proved to be Paleozoic to Mesozoic rocks, among which these Paleozoic magmatic rocks were generally related to subduction regime. So far, none Proterozoic rocks have been identified from the Zhalantun Precambrian basement, though some ~600-3210 Ma ancient detrital/xenocryst zircons were reported. Combined with ancient zircon ages and newly reported ~2.5 Ga and ~1.8 Ga granites from the south of the Zhalantun, therefore, the Precambrian rocks probably once exposed in the Zhalantun while they were re-worked and consumed during later long tectonic evolutionary history, resulting in absence of Precambrian rocks in the Zhalantun. | QIN Tao GUO Rongrong ZANG Yanqing QIAN Cheng WANG Yan SI Qiuliang SUN Wei MA Yongfei | 2019 | Acta Geologica Sinica(English Edition)2019，93，5： | 3 |
| 19 | Study on traveling magnetic field casting of sheet components显示文摘The distribution of a magnetic field over an inductor used for sheet castings has been investigated experimentally.With an increase in height from the surface, the magnetic field density decreases according to the exponential law.In the transverse direction, the magnetic field density is approximately uniform except near the edges.The magnetic field density is direct proportional to the number of turns multiplied by the current in amperes.Ferro-magnetic material in the upper mould can enhance the magnetic field density.Under the electromagnetic force, the mould-filling process of sheet casings has been studied by physical simulation method.The difference in filling capability between gravity casting and travelling magnetic field casting has been studied.The electromagnetic force can enhance the filling process, but it also brings a problem.With an increase in the magnetic field density, the surface quality of the aluminum alloy sheet castings becomes poor.The reason is discussed. | Su Yanqing Xu Yanjin Zhao Lei Zhang Tiejun Wu Shiping Guo Jingjie | 2010 | China Foundry2010，7，3： | 3 |
| 20 | A dual-active Co-CoO heterojunction coupled with Ti_(3)C_(2)-MXene for highly-performance overall water splitting显示文摘Development of cost-effective and highly-efficient bifunctional hydrogen evolution reaction(HER)and oxygen evolution reaction(OER)catalysts is crucial for overall water splitting in practical utilization.Herein,we proposed a novel non-noble metal bifunctional,HER/OER electrocatalyst by synergistically coupling a dual-active Co-based heterojunction(Co-CoO)with high conductive and stable two-dimensional Ti_(3)C_(2)-MXene(defined as Co-CoO/Ti^(3)CrMXene).A series of characterizations and theoretical calculations'verify that the synergistic effect of metallic Co with HER activity and Coo with OER performance leads to superb bifunctional catalytic performance,and Ti_(3)C_(2)-MXene can enhance electrical conductivity and prevent the aggregation of the Co-based catalysts,thereby improving both the activity arid stability.Co-Co0/Ti_(3)C_(2)-MXene presents low onset potential(11onse1)of 8 mV and,Tafel slope of 47 mV·dec^(-1) for HER(close to that of Pt/C)and 17onset of 196 mV and Tafel slope of 47 mV·dec^(-1) for OER(superior to:that of Ru02).Assembled as an electrolyzer,Co-CoO/Ti_(3)C_(2)-MXene shows a low voltage of 1.55 V at 10 mA·cm^(-2),high Faradaic efficiency and remarkable stability.It can be driven by a solar cell of-1.55 V for consecutive production of hydrogen and oxygen gases. | Dezheng Guo Xin Li Yanqing Jiao Haijing Yan Aiping Wu Ganceng Yang Yu Wang Chungui Tian Honggang Fu | 2022 | Nano Research2022，15，1： | 2 |
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