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Magmatic Event at the End of the Archean in Eastern Hebei Province and Its Geological Implication

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Acta Geologica Sinica(English Edition) 2006年第6期80卷 819-833页

作者： GENG yuansheng liu Fulai YANG Chonghui Institute of Geology Chinese Academy of Geological Sciences Beijing 100037

By using the SHRIMP U-Pb and single zircon stepwise evaporation methods, the authors have obtained some results for granitoids from eastern Hebei Province. The Yuhuzhai hyperthene tonalitic granite was formed 2550 Ma ago, the Qingyangshu gabbroic gneiss 2536 Ma, the Yinmahe granodioritic gneiss near Lücao, Lulong County, 2533 Ma, the gabbro-dioritic gneiss near Longwan, Qianxi County, 2518-2515 Ma, the Qiuhuayu trondjemitic gneiss at Zunhua 2515 Ma, the Xiaoguanzhuang tonalitic gneiss at Zunhua 2495 Ma, and the Cuizhangzi gneiss in Qianxi County 2492 Ma. These geochronilogical data demonstrate that, though diverse in composition, type and origin, the granitic gneisses in eastern Hebei Province were emplaced and crystallized in a rather short period of magmatic activity. The formation of such a great amount of gneisses in this small time gap suggests that it was a critical crust accretion stage at the end of Neoarchean. The fact that granitoids of various types occurred at the same time implies a large-scale underplating （mantle plume） activity, which was then responsible for the crust accretion.

关键词： orthogneiss magmatic event Neoarchean zircon age eastern Hebei Province

Effects of organic acids on dissolution of Fe and Mn from weathering coal gangue

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Acta Geochimica 2016年第3期35卷 316-328页

作者： Zuyong Chen Fang liu Tongda Bu yuansheng liu Jian Zhu College of Resources and Environmental Engineering Guizhou University College of Agriculture Guizhou University

Understanding the effects of organic acids （OA） on the transformation of Fe and Mn to surface water from the weathering coal gangue is of great benefit to risk assessment and remediation strategies for contaminated water and soil. Based on the investigation on surface water in the central coal districts of the Guizhou Province, 18 water samples were collected for heavy metal analysis. The results indicated that the pH value of surface water is low （3.11-4.92）, and Fe concentration （1.31-5.55 mg L-1） and Mn concentration （1.90-5.71 mg L^-1） were, on average, 10.86 and 34.33 times the limit of Surface Water Quality Standards, respectively. In order to evaluate the effects of the OA on the dissolution of Fe and Mn from the weath- ering coal gangue, column elution and batch leaching experiments were conducted. The results show that the low molecular weight of organic acids （LMWOAs, i.e., oxalic, tartaric, malic and citric acids） and fulvic acids signifi- cantly accelerated the dissolution of Fe and Mn; in addi- tion, when the concentration of OA reached 25 mmol L-1, the concentrations of Fe, and Mn were 1.14-67.08 and 1.11-2.32 times as high as those in 0.5 mmol L-1OA, respectively. Furthermore, the migration of Fe and Mn was significantly influenced by the pH and Eh, especially for Fe; the ion Mn was dissolved from the gangue more easily than the ion Fe in the column leaching, which was contrary to the results of batch leaching.

关键词： Coal gangue LMWOAs Fulvic acids -Iron Manganese Leaching

Comparing the regeneration potential between PLLA/Aragonite and PLLA/ Vaterite pearl composite scaffolds in rabbit radius segmental bone defects

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Bioactive Materials 2020年第4期5卷 980-989页

作者： Qianli Huang yuansheng liu Zhengxiao Ouyang Qingling Feng State Key Laboratory of Powder Metallurgy Central South UniversityChangsha410083PR China State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and EngineeringTsinghua UniversityBeijing100084PR China Public Security College Northwest University of Political Science and LawXi'an710122PR China Department of Orthopedics The Second Xiangya HospitalCentral South UniversityChangsha410083PR China

Mussel-derived nacre and pearl,which are natural composites composed CaCO3 platelets and interplatelet organic matrix,have recently gained interest due to their osteogenic *** crystal form of CaCO3 could be either aragonite or vaterite depending on the characteristics of mineralization template within *** far,little attention has been paid on the different osteogenic capacities between aragonite and vaterite *** the current work,aragonite or vaterite pearl powders were incorporated into poly-L-lactic acid(PLLA)scaffold as bio-functional fillers for enhanced *** intro results revealed that PLLA/aragonite scaffold possessed stronger stimulatory effect on SaOS-2 cell proliferation and differentiation,evidenced by the enhanced cell viability,alkaline phosphatase activity,collagen synthesis and gene expressions of osteogenic markers including osteocalcin,osteopotin and bone *** bone regeneration potential of various scaffolds was evaluated in vivo employing a rabbit critical-sized radial bone defect *** X-ray and micro-CT results showed that significant bone regeneration and bridging were achieved in defects implanted with composite scaffolds,while less bone formation and non-bridging were found for pure PLLA *** evaluation using Masson's trichrome and hematoxylin/eosin(H&E)staining indicated a typical endochondral bone formation process conducted at defect sites treated with composite *** three-point bending test,the limbs implanted with PLLA/aragonite scaffold were found to bear significantly higher bending load compared to other two ***,it is suggested that aragonite pearl has superior osteogenic capacity over vaterite pearl and PLLA/aragonite scaffold can be employed as a potential bone graft for bone regeneration.

关键词： Composite scaffold Aragonite Vaterite Segmental bone defect Bone regeneration

Synthesis of Cu-Doped Layered Transition Metal Oxide Cathode Materials Directly from Metal-Organic Frameworks for Sodium-Ion Batteries

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Chinese Journal of Chemistry 2023年第20期41卷 2597-2603页

作者： Xiaoniu Hou Changfeng Li Mengjie Li yuansheng liu Wei Zhu Zhenfei Li Yunhua Xu School of Materials Science and Engineering Key Laboratory of Advanced Ceramics and Machining Technology(Ministry of Education)and Tianjin Key Laboratory of Composite and Functional MaterialsTianjin UniversityTianjin300072 China

Mn-based layered transition metal oxides are promising cathode materials for sodium-ion batteries(SIBs)because of their high theoretical capacities,abundant raw materials,and environment-friendly ***,they often show insufficient performance due to intrinsic issues including poor structural stability and dissolution of Mn^(3+).Atomic doping is an effective way to address these structural degradation ***,we reported a new synthesis strategy of a Cu-doped layered cathode by directly calcinating a pure metal-organic *** from the unique structure of MOF with atomic-level Cu doping,a homogeneous Cu-doped layered compound P2-Na_(0.674)Cu_(0.01)Mn_(0.99)O_(2) was *** Cu substitution promotes the crystal structural stability and suppresses the dissolution of Mn,thus preventing the structure degradation of the layered cathode materials.A remarkably enhanced cyclability is realized for the Cu-doped cathode compared with that without Cu doping,with 83.8%capacity retention after 300 cycles at 100 mA·g^(-1).Our findings provide new insights into the design of atomic-level doping layered cathode materials constructed by MOFs for high-performance SIBs.

关键词： Metal-organic frameworks Synthesis design/Sodium-ion batteries Layered cathode materials Atomic doping

Hydrogen Bonding-Assisted Synthesis of Silica/Oxidized Mesocarbon Microbeads Encapsulated in Amorphous Carbon as Stable Anode for Optimized/Enhanced Lithium Storage

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Transactions of Tianjin University 2020年第1期26卷 13-21页

作者： Zongjie Cao Huitian liu Wenlong Huang Peng Chen yuansheng liu Yu Yu Zhongqiang Shan Shuxian Meng School of Chemical Engineering and Technology Tianjin University

The practical application of silica-based composites as an alternative to commercial graphite anode materials is hampered by their large volumetric expansion,poor conductivity,and low Coulombic *** this work,a novel silica/oxidized mesocarbon microbead/amorphous carbon(SiO2/O’MCMB/C)hierarchical structure in which SiO2 is sandwiched between spherical graphite and amorphous carbon shell was succes sfully fabricated through hydrogen bonding-assisted self-assembly and post-carbon coating *** obtained three-layer hierarchical structure effectively accommodates the volumetric expansion of SiO2 and significantly enhances the electronic conductivity of composite ***,the outer layer of amorphous carbon effectively increases the diffusion rate of lithium ions and promotes the formation of stable SEI *** a result,the SiO2/O’MCMB/C composite exhibits superior electrochemical performance with a reversible capacity of 459.5 mA h/g in the first cycle,and the corresponding Coulombic efficiency is 62.8%.After 300 cycles,the capacity climbs to around 600 mA h/*** synthetic route provides an efficient method for preparing SiO2 supported on graphite with excellent electrochemical performance,which is likely to promote its commercial applications.

关键词： Hydrogen bonding Silica Oxidized mesocarbon microbead Anode material

Future vehicles: interactive wheeled robots

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Science China(Information Sciences) 2021年第5期64卷 212-214页

作者： Nan MA Deyi LI Wen HE Yue DENG Jiahong LI Yue GAO Hong BAO Huan ZHANG Xinkai XU yuansheng liu Zhixuan WU Li CHEN Beijing Key Laboratory of Information Service Engineering Beijing Union University College of Robotics Beijing Union University Institute of System Engineering Academy of Military Science School of Astronautics Beihang University School of Software Tsinghua University Smart City College Beijing Union University Demonstration Center of Experimental Teaching in Comprehensive Engineering Beijing Union University

Owing to the lack of variety of interactions in automatic driving, the interactive cognition and evolution growth of self-driving vehicles in uncertain and complex environments have been proposed, making future vehicl... 详细信息

关键词： interactive cognition evolution growth wheeled robots prior knowledge driving skills

Electroacupuncture at Ren channel point combined with injection of basic fibroblast growth factors for neural stem cell proliferation in subventricular zone of cerebral ischemic side

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Neural Regeneration Research 2006年第5期1卷 424-427页

作者： Min Pi Lihong Diao Haibo Yu Xiaodan Rao Ling Wang yuansheng liu Wenshu Luo Zhuoxin Yang Department of Acupuncture and Moxibustion Shenzhen Hospital Guangzhou University of Traditional Chinese Medicine Shenzhen 518033 Guangdong Province China Postdoctoral Station of Guangzhou University of Traditional Chinese Medicine Guangzhou 510405 Guangdong Province China

BACKGROUND： Electroacupuncture at Ren channel point can treat stroke and generate some neurodevelopment-related growth factors, which are associated with the proliferation and differentiation of stem cells. OBJECTIVE： To observe the effect of electroacupuncture at Ren channel point combined with injection of basic fibroblast growth factors （bFGF） on the expression of 5-bromo-2-deoxyuridine （BrdU）-Iabeled and BrdU/Neuroepthelial stem cell protein （Nestin）-Iabeled positive cells in subventricular zone of cerebral ischemic rats. DESIGN ： Completely randomized grouping design and controlled trial.SETTING： Department of Acupuncture and Moxibustion, Shenzhen Hospital, Guangzhou University of Traditional Chinese Medicine. MATERIALS ： Eighty-four adult healthy male Wistar rats were involved and divided into 5 groups by a lot： blank group （n =6）, sham-operation group （n =6）, model group （n =26）, injection of bFGF group （bFGF group, n =24） and electroacupuncture at Ren channel combined with injection of bFGF group （bFGF group, n =22）. Three time points were set in each of the latter three groups for observation： 7, 14 and 28 days after ischemia respectively. Mouse BrdU and Nestin monoclonal antibody （analytical pure, China）, G6805 electro-acupuncture apparatus （Huayi Medical Instrument, Shanghai） and Olympus FV 500 laser confocal microscope （Olympus Company） were used. METHODS ： This trial was carried out in the Laboratory of Anatomy, Medical College of Sun Yat-sen University from September 2004 to July 2005. ① Except for blank group and sham-operation group, the rats in the other groups were prepared into rat models of local cerebral ischemia by suture-occluded method. The rats were reperfused, and then they were graded in neurologic deficits based on neurological scoring of Longa. Rat model was successful when the neurological scoring ranged from 1 to 4 points and used for the trial. Blank group was untouched; Right common carotid artery was isolated and right exter

关键词： subventricular zone cell proliferation cerebral ischemia normal group Traditional Chinese Medicine growth factors common carotid artery Acupuncture and Moxibustion neural stem cells monoclonal antibody confocal microscope synergistic effect Guanyuan point Wistar rats time point

Important Events and Chronological Framework of the Early Precambrian Granulite Terrain,Northwestern Hebei Province

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Acta Geologica Sinica(English Edition) 1997年第4期71卷 466-479页

作者： Geng yuansheng, liu Dunyi and Song BiaoInstitute of Geology, Chinese Academy of Geological Sciences, 26 Baiwanzhuang,Beijing 100037, China

Based on the chronological data and relevant geological evidence, the chronological framework of the major geological events of the granulite terrain in northwestern Hebei Province and its adjacent areas has been established. Basic lava eruption occurred in the span of 2868-2932 Ma, resulting in the formation of the early crust. The TTG magma emplacement took place c.2761 Ma ago. Subsequently basic magma intruded into the supracrustal rocks at 2650 Ma, resulting in crustal thickening. The thickening was enhanced at 2561-2503 Ma by the widespread intrusions of granodioritic magma. In the period of 2477-2461 Ma charnockite intruded, accompanied by regional granulite facies metamorphism. The second stage of granulite facies metamorphism occurred c. 2300 Ma ago, and finally pink granite intrusions at 2144-2087 Ma resulted in the formation of a granite zone.

关键词： geological event Early Precambrian geochronology granulite northwestern Hebei

一种能够抑制锂枝晶的锂金属电池电解液润湿性添加剂

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精细化工 2021年第10期38卷 2103-2110,2124页

作者：徐继开刘元生单忠强天津大学化工学院天津300350

将氟代有机溶剂2,2,3,3-四氟丙基甲基丙烯酸酯(TFPMA)作为双功能添加剂引入碳酸酯电解液体系,考察了TFPMA质量分数对增大润湿性的影响。采用交流阻抗、恒流充放电等测试了添加TFPMA后的锂金属电池性能。采用SEM和XPS表征了循环后的锂金... 详细信息

将氟代有机溶剂2,2,3,3-四氟丙基甲基丙烯酸酯(TFPMA)作为双功能添加剂引入碳酸酯电解液体系,考察了TFPMA质量分数对增大润湿性的影响。采用交流阻抗、恒流充放电等测试了添加TFPMA后的锂金属电池性能。采用SEM和XPS表征了循环后的锂金属电极表面。结果表明,1.0%(质量分数,下同)TFPMA的添加使电解液与隔膜间的接触角从54°降至44°,内阻从6.15Ω降至1.94Ω,Li-LiFePO_(4)电池在5 C电流密度下的比容量从66 mA·h/g提升至80 mA·h/g,1 C电流密度下的恒电流循环在100圈时还保持99%以上的库仑效率。TFPMA还促进了Li+的均匀沉积和优良固体电解质界面膜的形成,抑制了锂枝晶,电解液添加了1.0%TFPMA后,Li-Cu电池可以循环100圈以上,而库仑效率没有发生较大下降。循环后电极的SEM图表明,添加了1.0%TFPMA电解液的锂金属负极表面沉积更加平整,有较少的锂枝晶生成。

关键词：锂金属电池电解液润湿性氟代有机溶剂添加剂锂枝晶抑制有机电化学