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| 1 | Modeling experimental study on weathering-leaching of Emeishan basalt and its relation with metallogenesis显示文摘The Emeishan basalt has a high Cu background value (170×10-6 on average), and thus provides a ore-forming material source for copper ores. The collected samples were exposed in basalt lavas of the third segment of the Emeishan basalt eruptive cycle. By using a set of automatically cycling glass apparatuses, weathering-leaching experiments by three kinds of rainwater on the collected samples were carried out in the open system (at normal temperature and normal pressure). The analysis results showed that the most intensive export of Cu occurred under acidic rainwater-induced weathering-leaching conditions, almost 2-3 orders of magnitude the export of Cu by mod-ern air rainwater, and 1-2 orders of magnitude higher than the export of Cu by CO2 rainwater. In addition, the total amount of Zn, Cu, U, Ni and Sr exported by acidic rainwater are greater than 1%. All this indicates that copper in the Emeishan basalt provided the copper source for Cu mineralization at the contact between the basalt and the Maokou Formation limestone at the bottom. | WANG Fudong ZHU Xiaoqing HAN Tao LI Zengsheng | 2010 | Chinese Journal Of Geochemistry2010，29，2： | 6 |
| 2 | Simulating experiment on the enrichment of precious metals in Lower Cambrian black shale series of Hunan and Guizhou provinces显示文摘Adsorption experiments were made at room temperature and neutral pH value on different types of min-erals associated with the Lower Cambrian black shale series polymetallic layers in Hunan and Guizhou provinces on nanometer-sized Pt colloids and PtCl42--bearing ionic solutions with an attempt to constrain the relationship between the different types of minerals in the polymetallic layers and the enrichment of platinum group elements (PGEs). Experimental results showed that the different types of minerals show strong selectivity to the adsorption of nano-meter-sized Pt colloids and PtCl42--bearing ionic solutions. Metallic sulfides, organic matter and clay minerals are the strong adsorbents of PGEs, while quartz, albite, muscovite and other silicate minerals show a week adsorbility to both of them. This phenomenon is well consistent with the geological fact that metallic sulfides, organic matter and clay minerals in the polymetallic layers of the black shale series are the major carrier minerals of PGEs, giving a thorough explanation to the mechanism of enrichment of previous metal elements. Adsorption may be a principal mechanism of enrichment of precious metal elements under lower temperature conditions. The presence of the aforementioned strong adsorbents is the good geochemical barriers for the enrichment of PGEs. | HAN Tao ZHU Xiaoqing LI Zengsheng | 2011 | Chinese Journal Of Geochemistry2011，30，3： | 2 |
| 3 | The occurrence of gold in pyrite from the Liulincha gold ore belt,western Hunan Province,China显示文摘In this study,an electron microprobe analyzer(EMPA) was used to map the spatial distribution and the occurrence of invisible gold in pyrite from the Liulincha gold ore belt.EPMA data show that gold mainly occurs as submicroscopic-microscopic inclusions.From the contrast of the major guide elements of pyrite from the Liulincha gold ore belt and those from four hydrothermal-type gold deposits in the Jiaodong region,we can see the pyrites were formed in two stages:the pyrite from wall rock is mainly sedimentogenic,with simple structure;and the pyrite from ore body experienced early sedimentary process to late hydrothermal activity,the pyrite is regular in crystal form and exhibits fractured structure. | LI Zengsheng ZHU Xiaoqing LU Huanzhang HAN Tao | 2013 | Chinese Journal Of Geochemistry2013，32，4： | 1 |
| 4 | A new way to evaluate thrombotic risk in failure heart and ventricular assist devices显示文摘Thrombosis is one of the main complications in patients implanted with ventricular assist device(VAD).The complicated structure and disturbed flow field within failure heart and blood pump play an important role in thrombosis formation.In this study,the influence of Left ventricular(LV)volumes on flow field contributing to thrombosis formation within failure heart and VAD was investigated.Computational Fluid Dynamics(CFD)methods were employed to investigate the effect of different LV volumes on the thrombogenic potential of failure heart and VAD.Lagrangian methods were utilized to obtain information on platelet voyage trajectories.The concepts of mean and threshold of stress accumulation and residence time were introduced to accurately assess the likelihood of thrombus.Eulerian methods were used to identify thrombus-prone locations.CFD results showed that residence time(RT)was the main cause of thrombus formation in the failure heart,and the percentage of platelet trajectories above the RT threshold increased significantly with increasing LV volume.The RT in the left atrial appendage and LV increased significantly with LV volume increasing,which indicated that thrombus is prone to form there.Compared with the failure heart,non-physiological shear stress(NPSS)-caused platelet activation is the main reason for thrombus formation within VAD.The narrow zones(top clearance and secondary flow passage)within VAD have a high incidence of thrombus generation.In VAD patients,the LV volume has an important impact on thrombosis probability within failure heart,in which the larger size of the LV volume is,the higher risk of thrombosis will be.The size of LV volume has little effect on the thrombosis formation probability of VAD,where the NPSS plays the leading role in thrombosis formation.The finding of this study can be utilized to guild the clinical treatment and VAD structure optimization design for reducing the thrombosis risk. | Yuan Li Yifeng Xi Hongyu Wang Anqiang Sun Xiaoyan Deng Zengsheng Chen Yubo Fan | 2022 | Medicine in Novel Technology and Devices2022，，4： | 1 |
| 5 | Difunctional NH_(2)-modified MOF supporting plentiful ion channels and stable LiF-rich SEI construction via organocatalysis for all-solid-state lithium metal batteries显示文摘As an essential part of the performance improvement of lithium metal batteries,the acquisition of dense(LiF-rich solid electrolyte interphase(SEI))has always been an urgent problem to be solved.Herein,we synthesized Zeolitic Imidazolate Frameworks(ZIFs)modified by two different functional groups(-NH_(2),-CH_(3))and used them as the fillers of polyethylene oxide(PEO)composite solid electrolytes to explore the catalytic effect of groups on LiF generation at the Li/electrolytes interface.In a LiFePO 4||SPE||Li cell test,the PEO-ZIF-NH_(2)with LiF-rich SEI exhibits enhanced cycling performance,which was 3.8 times longer than that of PEO-ZIF-CH_(3).The formation mechanism of LiF-rich SEI was investigated using first-principles calculation,revealing that ZIFs-NH_(2)makes the C-F bond in TFSI-longer compared with ZIFs-CH_(3),which leads to easier breakage of the C-F bond and promoted the formation of LiF.The simple design idea of using organic catalysis to generate more stable SEI provides a new aspect for preparing high-performance lithium metal batteries. | Xuanyi Zhou Chenghan Li Biao Zhang Fenfen Huang Pan Zhou Xinming Wang Zengsheng Ma | 2023 | Journal of Materials Science & Technology2023，，5： | 1 |
| 6 | The impact of ECMO lower limb cannulation on the aortic flow features under differential blood perfusion conditions显示文摘The purpose of this study is to investigate the impact of veno-arterial(VA)ECMO cannulation on hemodynamic distribution and organ perfusion within aorta under differential blood perfusion conditions.The total blood flow volume supplied by failure heart and ECMO keep constant,flow volume ratio of heart output(FVR-HO)increases from 0%to 100%and correspondingly flow volume ratio of ECMO(FVR-ECMO)decreases from 100%to 0%.The flow patterns within aorta,wall shear stress(WSS),oscillatory shear index(OSI),relative retention time(RRT)were analyzed.The locations of oxygenated and de-oxygenated blood mixing region(BMR)was influenced by FVR-HO.With FVR-HO increasing,BMR moves from proximal to distal side of heart.When FVR-HO was 0%,oxygenated blood supplied by ECMO completely perfuses the aortic vessels.High WSS appears in the iliac artery and abdominal aorta vessel walls closed to cannula position.When FVR-HO was in the range of 10%–30%,the BMR was in aortic arch.The higher OSI and RRT were exhibited in ascending aorta and aorta arch.When FVR-HO was 40%and 50%,the BMR was in ventral trunk for systolic period and in aortic arch for diastolic period.The higher OSI and RRT regions enlarge and metastasize to the descending aorta.When FVR-HO was larger than 50%,the BMR was in the downstream region of the renal artery.Of note,when FVR-HO increases from 0%to 100%,the flow ratios in the two renal arteries change from significant different to be closed at systolic period.Peripheral VA-ECMO with various perfusion levels from cardiac output and ECMO has significant effect on aortic flow surrounding.Partial recovery of heart function can impel BMR moves from proximal to distal side of the heart,which may lead to inadequate supply of oxygenated blood to the upper limb and cephalic vessels. | Yifeng Xi Yuan Li Hongyu Wang Anqiang Sun Xiaoyan Deng Zengsheng Chen Yubo Fan | 2022 | Medicine in Novel Technology and Devices2022，，4： | 0 |
| 7 | Preliminary Discussion on Comprehensive Utilization of Tailings显示文摘Tailings produced in a concentration plant are the discharge of solid wastes after grinding ore into size and selecting useful components in the specific economic and technological condition. According to statistics, for the mining of metal ore, non-metallic ore, coal, clay, etc, the production of tailings of the world is up to 100 million tons per year. The number of existing tailing piles is 12718 in China, of which the construction ones are 1526, accounting for 12% of the total, and the closed tailing piles are 1024, accounting for 8%. As of 2007, the national total tailings accumulation is 8.046 billion tons. The non-ferrous metal mining is one of the largest discharge of solid wastes industries because of its low comprehensive recovery rate. For example, the beneficiation and recovery rate of non-ferrous metal mine is from 50% to 60% in China, which is lower 10% to 15% than developed countries, and the associated non-ferrous metal recovery rate is 40%, which is lower 20% than developed countries. On the utilization of duns, Poland is 90% to 100%, United States, Australia, France, Canada, Belgium and other countries followed, while China is only about 20%. The utilization of fly ash is to 100% in Japan and Denmark, France is 65%, UK is 55%, and China is just 45%. Quantities of waste rock, waste slag, and waste water have occupied land, destructed vegetation, deteriorated the soil and water quality, and caused land subsidence, landslides, mud-flow and other geological disasters. Therefore, the comprehensive utilization of resources is the right choice of mining sustainable development, environment protection, resource conservation, economic and social development. | WANG Fudong ZHU Xiaoqing WANG Zhonggang HAN Tao LI Zengsheng SUN Xiaohui LING Kunyao | 2013 | 矿物学报2013，33，S1： | 0 |
| 8 | A systematic review of DVT and stent restenosis after stent implantation for iliac vein compression syndrome显示文摘Iliac vein compression syndrome(IVCS)is a common venous disease caused by joint compression of the right common iliac artery and the lumbosacral vertebrae.The compression of iliac vein not only causes venous hypertension in the lower extremities,but also induces venous valve dysfunction and superficial varicose veins in lower extremities.Moreover,the compression of iliac vein is an important potential factor for iliofemoral vein thrombosis.Currently,open surgery and stent implantation are the main treatment for IVCS.Due to the advantages of minimally invasive and postoperative patency,stent implantation for IVCS has gradually become the standard treatment.However,when the stent is implanted into the iliac vein to treat IVCS,the complications,such as restenosis,deep vein thrombosis(DVT)appear,which affect the patency of stent and hamper the patient recovery.Up to now,the mechanism how the stent implantation induces the restenosis and DVT is still unclear.In this review,we summarized the clinical symptoms,treatment methods of IVCS and the complications after stent implantation,and analyzed the mechanism of stent restenosis and DVT,and finally discuss the iliac vein stent design specifically for treating IVCS. | Hongyu Wang Anqiang Sun Yuan Li Yifeng Xi Yubo Fan Xiaoyan Deng Zengsheng Chen | 2022 | Medicine in Novel Technology and Devices2022，，3： | 0 |
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