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| 1 | Enhancing both selectivity and coking-resistance of a single-atom Pd1/C3N4 catalyst for acetylene hydrogenation显示文摘选择加氢是在化学升级的一个重要工业催化过程,在因为他们的高加氢活动,基于 Pd 的催化剂广泛地被使用的地方。然而,因为重焦炭形成,差的选择和短催化剂一生是主要担心。在这个工作,原子地驱散 Pd 原子成功地在 graphitic 碳氮化物上被综合(g-C 3 用原子层免职的 N 4) 。没有 Pd nanoparticle (NP ) ,改正错误的高角度的环形的黑暗地的扫描传播电子显微镜学(HAADF 茎) 证实了孤立的 Pd 原子的主导的存在形成。在在过量乙烯的乙炔的选择加氢期间, g-C 3 N 4-supported Pd NP 催化剂比常规 Pd/Al 2 O 3 和 Pd/SiO 2 催化剂。在原处, X 光检查光致核裂变光谱学表明可观的费用从 Pd NP 转到 g-C 3 N 4 多半在催化表演改进起一个重要作用。更给人深刻印象地,单个原子的 Pd 1/C3 N 4 催化剂展出了两种更高的乙烯选择和更高的 coking 抵抗。我们的工作证明单个原子的 Pd 催化剂是在加氢反应改进选择和焦炭抵抗的一个有希望的候选人。 | Xiaohui Huang Yujia Xia Yuanjie Cao Xusheng Zheng Haibin Pan Junfa Zhu Chao Ma Hengwei Wang Junjie Li Rui You Shiqiang Wei Weixin Huang Junling Lu | 2017 | Nano Research2017，10，4： | 16 |
| 2 | Sirt1-ROS-TRAF6 Signaling-Induced Pyroptosis Contributes to Early Injury in Ischemic Mice显示文摘Stroke is an acute cerebro-vascular disease with high incidence and poor prognosis,most commonly ischemic in nature.In recent years,increasing attention has been paid to inflammatory reactions as symptoms of a stroke.However,the role of inflammation in stroke and its underlying mechanisms require exploration.In this study,we evaluated the inflammatory reactions induced by acute ischemia and found that pyroptosis occurred after acute ischemia both in vivo and in vitro,as determined by interleukin-1β,apoptosis-associated speck-like protein,and caspase-1.The early inflammation resulted in irreversible ischemic injury,indicating that it deserves thorough investigation.Meanwhile,acute ischemia decreased the Sirtuin 1(Sirtl)protein levels,and increased the TRAF6(TNF receptor associated factor 6)protein and reactive oxygen species(ROS)levels.In further exploration,both Sirtl suppression and TRAF6 activation were found to contribute to this pyroptosis.Reduced Sirtl levels were responsible for the production of ROS and increased TRAF6 protein levels after ischemic exposure.Moreover,N-acetyl-L-cysteine,an ROS scavenger,suppressed the TRAF6 accumulation induced by oxygen-glucose deprivation via suppression of ROS bursts.These phenomena indicate that Sirtl is upstream of ROS,and ROS bursts result in increased TRAF6 levels.Further,the activation of Sirtl during the period of ischemia reduced ischemiainduced injury after 72 h of reperfusion in mice with middle cerebral artery occlusion.In sum,these results indicate that pyroptosis-dependent machinery contributes to the neural injury during acute ischemia via the Sirt1-ROS-TRAF6 signaling pathway.We propose that inflammatory reactions occur soon after oxidative stress and are detrimental to neuronal survival;this provides a promising therapeutic target against ischemic injuries such as a stroke. | Weijie Yan Wei Sun Jiahui Fan Haiqing Wang Song Han Junfa Li Yanling Yin | 2020 | Neuroscience Bulletin2020，36，8： | 9 |
| 3 | Study on liquid-liquid bimetal composite casting hammers显示文摘Crusher hammers for the mineral processing industry must meet the demands of both high wear resistance at the hammer head and high impact toughness at the hammer handle. The crusher hammers made of Hadfield steel have typically low service life of less than 40 hours. To solve the problem, a kind of bimetal crusher hammers made of high chromium cast iron(HCCI) and low alloy steel(LAS) has been successfully developed by using liquid-liquid composite casting. The microstructure and composite interface bonding was analyzed using optical microscope, SEM, EDX and XRD. Micrographs indicate that the composite interface is metallurgically bonded with a zigzag shape across the boundary and without unbound region or void. After heat treatment, the composite hammers have shown excellent properties. The hardness of HCCI is at least 63 HRC and its αk is greater than 3.5 J·cm-2; the hardness of LAS is greater than 35 HRC and its αk is no less than 80 J·cm-2. Diffusion of elements takes place at the interface and forms a transition region. The micro hardness increases from LAS to the interface and then to HCCI. Wear comparison was made separately between the bimetal composite hammer and a Hadfield steel hammer in two quarries of Jilin province and Liaoning province. The results showed that the liquid-liquid bimetal composite hammers did not have the falling off of hammer head or impact fracture phenomenon, and their service life was 3.75 times as long as that of the Hadfield steel hammers. | Rong Shoufan Zhou Haitao ZhuYongchang Wang Junfa Yao Jia Li Chunhong | 2014 | China Foundry2014，11，5： | 9 |
| 4 | Voussoir beam model for lower strong roof strata movement in longwall mining - Case study显示文摘The paper presents the influence of varying immediate roof thickness on the lower strong roof strata movement and failure pattern in longwall coal mining with large mining height. The investigation is based on 58 geological drill holes and hydraulic shield pressure measurements around the longwall Panel 42105 of the Buertai Mine in Inner Mongolia Autonomous Region, China. The longwall Panel 42105 is characterized by relatively soft immediate roof strata of varying thickness superposed by strong strata,herein defined as lower strong roof. A voussoir beam model is adopted to interpret the structural movement of the lower strong roof strata and shield pressure measurements. It is shown that when the immediate roof is relatively thick, the broken overlying lower strong roof tends to form a stable voussoir beam with previously broken layer, thus not exerting high pressure on the hydraulic shield and working face. When the immediate roof is relatively thin, the broken overlying lower strong roof tends to behave as a cantilever beam, thus exerting higher pressure on the hydraulic shield and working face. Comparison of model predictions with measured time-weighted average shield pressure(TWAP) shows good agreement. | Chuang Liu Huamin Li Hani Mitri Dongjie Jiang Huigui Li Junfa Feng | 2017 | Journal of Rock Mechanics and Geotechnical Engineering2017，9，6： | 5 |
| 5 | Study on Thermal Simulation of Solidification in Heavy Section Ductile Iron显示文摘Using an artificial intelligent instrument and a computer feedback control method, a new thermal simulation systemis studied. Based on numerical simulation of casting solidification, a sample in the new system successfully simulatedthe solidification of heavy section ductile iron. The results show that the new thermal simulation system is accurateand reliable. Not only cooling curve but also graphite in the center of the thermal sample and the heavy sectionductile iron is identical. Realization of accurate thermal simulation of solidification in heavy section ductile iron willbe helpful for studying formation mechanism and controlling graphite degeneration in heavy section ductile iron. | Zhenhua LI Yanxiang LI Huiyuan GENG Jianjun CHEN Chunyan ZHOU Junfa CHEN | 2003 | Journal of Materials Science & Technology2003，19，z1： | 5 |
| 6 | Towards full-spectrum photocatalysis: Achieving a Z-scheme between Ag2S and TiO2 by engineering energy band alignment with interfacial Ag显示文摘Z 计划是一条有希望的途径完成用途广泛的光催化。有有 1.0 eV 的乐队差距的另一个半导体的 TiO 2 的集成将对紫外的收获和在可见附近理想为光催化的红外线的光;然而,大多数 narrow-bandgap 半导体让与组成一个障碍到为 photocatalytic 氢生产形成 Z 计划的 TiO 2, 跨骑乐队结构排列。在这通讯,我们表明 Ag 2 是的 S 在哪儿的一个模型系统精力乐队分享一个接口,一个金属罐头克服的 narrow-bandgap 半导体换高速档这限制。制作设计,我们开发了一条唯一的途径综合 Ag 2 SAgTiO 2 混血儿结构。戏剧性地展出的获得的第三的混合结构在完整光谱的轻照明下面在 photocatalytic 氢生产提高了性能。这些活动比 Ag 2 SAgTiO 2 结构在下面 < 400 nm 并且 > 他们在任何轻照明下面的对应物的象那些一样的 400 nm 照耀调节。 | Yanrui Li Leilei Li Yunqi Gong Song Bai Huanxin Ju Chengming Wang Qian Xu Junfa Zhu Jun Jiang Yujie Xiong | 2015 | Nano Research2015，8，11： | 5 |
| 7 | Decreased phosphorylation and protein expression of ERK1/2 in the brain of hypoxic preconditioned mice 显示文摘 | Long Caixia Gao Yanan Li Junfa | 2006 | Neurosci Lett2006，397，： | 1 |
| 8 | The FBP Interacting Repressor Targets TFIIH to Inhibit Activated Transcription显示文摘 | Juhong Liu Liusheng He Irene Collins Hui Ge Daniel Libutti Junfa Li Jean-Marc Egly David Levens | 2000 | Molecular Cell2000，，2： | 1 |
| 9 | Identification of protein kinase C isoforms involved in cerebral hypoxic preconditioning of mice 显示文摘 | Li Junfa Niu Chenchen Han Song | 2005 | Brain Res2005，1060，1： | 1 |
| 10 | Application of a fractal method relating concentrations and distances for separation of geochemical anomalies from hackground显示文摘 | Changjiang Li Tuhua Ma Junfa Shi | 2005 | Journal of Exploration2005，77，： | 1 |
| 11 | A Koch-like sided fractal bow-tie di- pole antenna 显示文摘 | Li Daotie Mao Junfa | 2012 | IEEE Transactions on Antennas and Propagation2012，60，5： | 1 |
| 12 | Identification of protein kinase C isoforms involved in cerebral hypoxic preconditioning of mice显示文摘 | Li Junfa Niu Chenchen Han Song | 2005 | Brain Res2005，1060，： | 1 |
| 13 | Application of a fractal method relating concentrations and distances for separation of geochemical anomalies from background显示文摘 | Li Changjiang Ma Tuhua Shi Junfa | 2003 | Journal of Geochemical Exploration2003，77，23： | 1 |
| 14 | Design of a varied-line-spacing plane grating monochromator for surface physics 显示文摘 | Li Chaoyang Zhu Junfa Wang Qiuping | 2013 | Journal of Physics: Conference Series2013，425，16： | 1 |
| 15 | Study on parameter optimization of concave disc copying icebreaking snow sweeper显示文摘 | LI Yaqin Wu Wenfu WANG Junfa | 2014 | International Journal of Smart Home2014，8，3： | 1 |
| 16 | BICAO-induced ischaemia caused depressive-like behaviours and caspase-8/-9-dependent brain regional neural cell apoptosis in mice显示文摘Introduction Cerebral ischaemia-induced depression is among the most frequent neuropsychiatric consequences and adversely impact the prognosis and recovery of patients.Although several brain regions have been implied in the development of ischaemia-induced depression,the brain region-specific neural cell apoptosis pathways have not been clarified yet.Methods In this study,bilateral internal carotid artery occlusion(BICAO)mouse model was established to induce cerebral ischaemia.Sucrose preference,tail suspension and forced swim tests were conducted on mice at 7,21 and 30 days after BICAO treatment.In addition,brain regional ischaemic neuron loss was investigated by using immunofluorescent staining of neuronal nuclei(NeuN)and caspase-8/-9-dependent cell apoptosis was also examined by western blot analysis.results BICAO-induced cerebral ischaemia resulted in decreased sucrose preference and increased immobility times,which were representative depressive-like behaviours of mice until 30 days after BICAO treatment compared with Sham-operated mice.This outcome was associated with significant neuron loss by using immunofluorescent staining and increased cleavage levels of pro-caspase-3/-8/-9,but not pro-caspase-12,by western blot analysis in hypothalamus,midbrain,prefrontal cortex and hippocampus of mice.Conclusions This study showed that BICAO-induced ischaemia caused depressive-like behaviours and caspase-8/-9-dependent neural cell apoptosis in several brain regions,including hypothalamus and midbrain of mice. | Shuiqiao Liu Song Han Qingqing Dai Shujuan Li Junfa Li | 2018 | Stroke & Vascular Neurology2018，3，1： | 1 |
| 17 | Engineering the morphology and electronic structure of atomic cobalt-nitrogen-carbon catalyst with highly accessible active sites for enhanced oxygen reduction显示文摘The stabilization of non-precious metals as isolated active sites with high loading density over nitrogendoped carbon materials is essential for realizing the industrial application of single atom catalysts.However,achieving high loading of single cobalt active sites with greatly enhanced oxygen reduction reaction(ORR)activity and stability remains challenging.Here,an efficient approach was described to create a single atom cobalt electrocatalyst(Co SAs/NC)which possesses enhanced mesoporosity and specific surface area that greatly favor the mass transportation and exposure of accessible active sites.The electronic structure of the catalyst by the strong metal-support interaction has been elucidated through experimental characterizations and theoretical calculations.Due to dramatically enhanced mass transport and electron transfer endowed by morphology and electronic structure engineering,Co SAs/NC exhibits remarkable ORR performance with excellent activity(onset and half-wave potentials of 1.04 V(RHE)and 0.90 V(RHE),Tafel slope of 69.8 mV dec^(-1)and J_(k) of 18.8 mA cm^(-2)at 0.85 V)and stability(7 mV activity decay after 10,000 cycles).In additio n,the catalyst demonstrates great promise as an alternative to traditional Pt/C catalyst in zinc-air batteries while maintaining high performance in terms of high specific capacity of(796.1 mAh/g_(Zn)),power density(175.4 mW/cm^(2)),and long-term cycling stability(140 h).This study presents a facile approach to design SACs with highly accessible active sites for electrochemical transformations. | Zhijun Li Leipeng Leng Siqi Ji Mingyang Zhang Hongxue Liu Jincheng Gao Jiangwei Zhang J.Hugh Horton Qian Xu Junfa Zhu | 2022 | Journal of Energy Chemistry2022，31，10： | 1 |
| 18 | Identification of protein kinase C isoforms involved in cerebral hypoxic preconditioning of mice 显示文摘 | Li Junfa Niu Chenchen Han Song | 2005 | Brain Res2005，1060，： | 1 |
| 19 | Identification of protein kinase C isoforms involved in cerebral hypoxic preconditioning of mice显示文摘 | Li Junfa Niu Chenchen Han Song | 2005 | Brain Res2005，1060，： | 1 |
| 20 | Alkali ion-promoted palladium subnanoclusters stabilized on porous alumina nanosheets with enhanced catalytic activity for benzene oxidation显示文摘Catalytic C−H bond activation is one of the backbones of the chemical industry.Supported metal subnanoclusters consisting of a few atoms have shown attractive properties for heterogeneous catalysis.However,the creation of such catalyst systems with high activity and excellent anti-sintering ability remains a grand challenge.Here,we report on alkali ion-promoted Pd subnanoclusters supported over defectiveγ-Al_(2)O_(3) nanosheets,which display exceptional catalytic activity for C−H bond activation in the benzene oxidation reaction.The presence of Pd subnanoclusters is verified by aberration-corrected high-angle annular dark-field scanning transmission electron microscopy,X-ray absorption spectroscopy,and X-ray photoelectron spectroscopy.This catalyst shows excellent catalytic activity,with a turnover frequency of 280 h^(−1) and yield of 98%,in benzene oxidation reaction to give phenol under mild conditions.Moreover,the introduction of alkali ion greatly retards the diffusion and migration of metal atoms when tested under high-temperature sintering conditions.Density functional theory(DFT)calculations reveal that the addition of alkali ion to Pd nanoclusters can significantly impact the catalyst’s structure and electronic properties,and eventually promote its activity and stability.This work sheds light on the facile and scalable synthesis of highly active and stable catalyst systems with alkali additives for industrially important reactions. | Zhijun Li Minghui Di Wei Wei Leipeng Leng Zhijun Li Cheng He Qiang Tan Qian Xu J.Hugh Horton Li Li Junfa Zhu | 2022 | Nano Research2022，15，7： | 1 |
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