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Optimization Study of Calcium Leaching From Steelmaking Slag

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Journal of Iron and Steel Research International 2012年第4期19卷 34-38,68页

作者： XU An-jun ZHANG Hui-ning YANG Yi CUI jian HE dong-feng TIAN Nai-yuan State Key Laboratory of Advanced Metallurgy University of Science and Technology Beijing Beijing 100083China School of Metallurgical and Ecological Engineering University of Science and Technology BeijingBeijing 100083 China Ningloo Iron and Steel Co Ltd Ningbo 315000 Zhejiang China

In order to study calcium leaching behavior for the steelmaking slag,factors that influence the leaching yield have been *** results show that granularity of the slag,liquid to solid ratio（in short for L/S）,temperature and reaction time have a significant effect on the leaching *** optimal conditions for leaching are determined as follows：1） the granularity at 75 μm,L/S at 100,temperature at 60 ℃;2） the granularity at 75 μm,L/S at 50,temperature at 40 ℃.Finally,the optimal leaching yield under these conditions is about 15%

关键词： steelmaking slag leaching yield calcium content

Natural Cocoons Enabling Flexible and Stable Fabric Lithium–Sulfur Full Batteries

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Nano-Micro Letters 2021年第5期13卷 204-217页

作者： Yanan An Chao Luo Dahua Yao Shujing wen Peitao Zheng Shangsen Chi Yu Yang jian Chang Yonghong Deng Chaoyang Wang Research Institute of Materials Science South China University of TechnologyGuangzhou 510640China Department of Materials Science and Engineering Guangdong Provincial Key Laboratory of Energy Materials for Electric PowerSouthern University of Science and TechnologyShenzhen 518055China College of Materials and Energy Guangdong Laboratory for Lingnan Modern AgricultureSouth China Agricultural UniversityGuangzhou 510642China Academy for Advanced Interdisciplinary Studies Southern University of Science and TechnologyShenzhen 518055China

Lithium–sulfur batteries are highly appealing as highenergy power systems and hold great application prospects for flexible and wearable ***,the easy formation of lithium dendrites,shuttle effect of dissolved polysulfides,random deposition of insulating lithium sulfides,and poor mechanical flexibility of both electrodes seriously restrict the utilization of lithium and stabilities of lithium and sulfur for practical ***,we present a cooperative strategy employing silk fibroin/sericin to stabilize flexible lithium–sulfur full batteries by simultaneously inhibiting lithium dendrites,adsorbing liquid polysulfides,and anchoring solid lithium *** from the abundant nitrogen-and oxygen-containing functional groups,the carbonized fibroin fabric serves as a lithiophilic fabric host for stabilizing the lithium anode,while the carbonized fibroin fabric and the extracted sericin are used as sulfiphilic hosts and adhesive binders,respectively,for stabilizing the sulfur ***,the assembled Li–S full battery provided a high areal capacity(5.6 mAh cm−2),limited lithium excess(90%),a high volumetric energy density(457.2 Wh L^(−1)),high-capacity retention(99.8%per cycle),and remarkable bending capability(6000 flexing cycles at a small radius of 5 mm).

关键词： Lithium-sulfur batteries Flexible batteries Carbonized silk fabric Lithium dendrite Shuttle effect

Extended π-conjugated N-containing heteroaromatic hexacarboxylate organic anode for high performance rechargeable batteries

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Journal of Energy Chemistry 2020年第12期29卷 303-311页

作者： Shu-Biao Xia Teng Liu wen-Jin Huang Hong-Bo Suo Fei-Xiang Cheng Hong Guo jian-Jun Liu Center for Yunnan-Guizhou Plateau Chemical Functional Materials and Pollution Control Qujing Normal UniversityQujing 655011YunnanChina School of Pharmacy Liaocheng UniversityLiaocheng 252059ShandongChina School of Materials Science and Engineering Yunnan UniversityKunming 650091YunnanChina

Organic electrode materials are desirable for green and sustainable Li-ion batteries(LIBs) due to their light-weight, low cost, abundance and multi-electron transfer reactions during battery operation. However, the successful utilization of organic electrodes is hindered by their poor electrical conductivity and low cyclic stability. Herein, a facile synthesis of π-conjugated N-containing heteroaromatic hexacarboxylate(Li6-HAT) compound and its electrochemical performance as an anode material in LIBs is *** as-synthesized Li6-HAT electrode renders an ultrahigh initial capacity of 1126.3 m Ah g^(-1) at the current density of 100 m A g^(-1). Moreover, π-conjugated N-containing heteroaromatic center provide excellent reversibility of(de)lithiation process, resulting in excellent capacity retention. Furthermore, a combination of density functional theory(DFT) calculations, in-situ Fourier transform infrared(FTIR) and ex-situ X-ray photoelectron spectroscopy(XPS) characterization reveal that the π-conjugated nitrogen and carboxyl oxygen act as electrochemically active sites during the charge/discharge process. The current work provides novel insights into the charge storage mechanism of organic electrodes and opens up avenues for further development and utilization of organic electrodes in Li-ion batteries.

关键词： Li-ion batteries Hexacarboxylate π-conjugated compounds N-containing Organic anode

Clinical Characteristics,Diagnosis,and Therapeutics of COVID-19:A Review

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Current Medical Science 2023年第6期43卷 1066-1074页

作者： Na-na XIE wen-cong ZHANG Jia CHEN Fang-bing TIAN jian-xin SONG Department of Infectious Diseases Tongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan430030China

The novel severe acute respiratory syndrome coronavirus 2(SARS-CoV-2)that suddenly emerged at the end of December 2019 and caused coronavirus disease 2019(COVID-19)continues to afflict humanity,not only seriously affecting healthcare systems but also leading to global social and economic *** of August 2022,there were approximately 580 million confirmed cases of COVID-19 and approximately 6.4 million confirmed deaths due to this *** data are sufficient to highlight the seriousness of SARS-CoV-2 *** most patients with COVID-19 present primarily with respiratory symptoms,an increasing number of extrapulmonary systemic symptoms and manifestations have been associated with *** the outbreak of COVID-19,much has been learned about the disease and its causative ***,great effort has been aimed at developing treatments and drug interventions to treat and reduce the incidence of *** this narrative review,we provide a brief overview of the epidemiology,mechanisms,clinical manifestations,diagnosis,and therapeutics of COVID-19.

关键词： coronavirus disease 2019 severe acute respiratory syndrome coronavirus 2 mechanism clinical manifestations diagnosis therapeutics

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凹凸棒土对人参种植土壤改良效果研究

园艺与种苗 2024年第9期44卷 3-6页

作者：温健孙文松张亚玉张利超孙立夫辽宁省经济作物研究所辽宁辽阳111000 成都大学四川成都610000 承德市中药材绿色生态种植技术服务中心河北承德067000 本溪龙宝参茸有限公司辽宁本溪007000

[目的]研究以凹凸棒土为原料的不同土壤处理方法对人参种植土壤的改良效果,探究人参种植前土壤改良方法。[方法]以种植人参土壤为研究对象,以田园土为对照,对6种处理下土壤肥力、土壤酶活性、土壤重金属含量进行测定分析。[结果]各处理... 详细信息

[目的]研究以凹凸棒土为原料的不同土壤处理方法对人参种植土壤的改良效果,探究人参种植前土壤改良方法。[方法]以种植人参土壤为研究对象,以田园土为对照,对6种处理下土壤肥力、土壤酶活性、土壤重金属含量进行测定分析。[结果]各处理对土壤的全磷、全钾和速效氮含量无显著影响,除了处理6土壤中酸性速效磷含量降低,其余处理都得到提升,其中处理3提升最多。处理1、3、4、5可显著或极显著提升土壤过氧化氢酶活性。土壤纤维素酶活性在2、4、5、6处理下得到了显著或极显著提升,而处理1、3极显著降低活性。除了处理4和5外,土壤中多酚氧化酶活性均得到了极显著提升。各种处理均极显著降低了土壤中脲酶的活性。所有处理土壤中铜、铅、砷含量均极显著低于农用地土壤污染风险筛选值;所有处理均可以极显著降低镉含量;处理2可以有效降低土壤中汞含量,处理后土壤无汞污染风险。[结论]该研究为下一步开展凹凸棒土改良人参种植土壤对人参生产的影响提供数据支撑。

关键词：凹凸棒土人参种植土壤改良

Dexmedetomidine attenuates traumatic brain injury: action pathway and mechanisms

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Neural Regeneration Research 2018年第5期13卷 819-826页

作者： dong Wang Xin Xu Yin-Gang Wu Li Lyu Zi-Wei Zhou jian-Ning Zhang Department of Neurosurgery Tianjin Medical University General Hospital Tianjin Neurological Institute Key Laboratory of Post-Neuroinjury Neuro-repair and Regeneration in Central Nervous System Ministry of Education and Tianjin City Department of Cardiovascular Tianjin Children's Hospital

Traumatic brain injury induces potent inflammatory responses that can exacerbate secondary blood-brain barrier（BBB） disruption, neuronal injury, and neurological dysfunction. Dexmedetomidine is a novel α2-adrenergic receptor agonist that exert protective effects in various central nervous system diseases. The present study was designed to investigate the neuroprotective action of dexmedetomidine in a mouse traumatic brain injury model, and to explore the possible mechanisms. Adult male C57 BL/6 J mice were subjected to controlled cortical impact. After injury, animals received 3 days of consecutive dexmedetomidine therapy（25 μg/kg per day）. The modified neurological severity score was used to assess neurological deficits. The rotarod test was used to evaluate accurate motor coordination and balance. Immunofluorescence was used to determine expression of ionized calcium binding adapter molecule-1, myeloperoxidase, and zonula occluden-1 at the injury site. An enzyme linked immunosorbent assay was used to measure the concentration of interleukin-1β（IL-1β）, tumor necrosis factor α, and IL-6. The dry-wet weight method was used to measure brain water content. The Evans blue dye extravasation assay was used to measure BBB disruption. Western blot assay was used to measure protein expression of nucleotide-binding oligomerization domain-like receptor family pyrin domain-containing 3（NLRP3）, caspase-1 p20, IL-1β, nuclear factor kappa B（NF-κB） p65, occluding, and zonula occluden-1. Flow cytometry was used to measure cellular apoptosis. Results showed that dexmedetomidine treatment attenuated early neurological dysfunction and brain edema. Further, dexmedetomidine attenuated post-traumatic inflammation, up-regulated tight junction protein expression, and reduced secondary BBB damage and apoptosis. These protective effects were accompanied by down-regulation of the NF-κB and NLRP3 inflammasome pathways. These findings suggest that dexmedetomidine exhibits neuroprotective effects

关键词： nerve regeneration traumatic brain injury neuroinflammation nuclear factor kappa B NLRP3 inflammasome brain edema blood-brain barrier tight junction proteins apoptosis neuroprotection dexmedetomidine neural regeneration

Validation of the use of foreign gas rebreathing method for non-invasive determination of cardiac output in heart disease patients

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2005年第12期6卷 1157-1162页

作者： dong Liang（董樑） WANG jian-an（王建安） jianG Chen-yang（蒋晨阳） Department of Cardiology Sir Run Run Shaw Hospital School of Medicine Zhejiang University Hangzhou 310016 China

Objective: To compare a new device (Innocor) for non-invasive measurement of cardiac output (CO) by foreign gas rebreathing method with conventional techniques used in the measurements of cardiac function. Methods: Cardiac outputs measured by Innocor (CORB) were compared with CO obtained by echocardiography (COEC), Swan-Ganz thermodilution (COTD), and left ventricle radiography (COLVR) in 34 patients subjected to cardiac catheterization. Values obtained from the four methods were analyzed by linear regression and paired values were compared by the method of Bland and Altman in SPSS. Results: There was strong positive correlation (r=0.94) between Innocor cardiac output values and the corresponding values obtained by ther-modilution and between COEC and COLVR values. Thermodilution appears to overestimate cardiac output when compared to the values obtained with Innocor by (0.66±0.22) L/min (P<0.0001). There was no correlation between data obtained by Innocor and the corresponding COEC and COLVR values. Conclusion: Innocor CORB is an easy, safe and well established method for non-invasive measurement of cardiac output with good prospects for clinical application in heart disease patients.

关键词： Indirect Fick (foreign gas rebreathing) Swan-Ganz Cardiac output Left ventricle radiography Echocardiography

A Novel Processing Route for Ni-doped Alumina Composites

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Chinese Journal of Aeronautics 2006年第B12期19卷 55-61页

作者： JING Mao-xiang SHEN Xiang-qian ZHOU jian-xin LI dong-hong LI Wang-xing School of Materials Science and Engineering Jiangsu University Zhenjiang 212013China Zhengzhou Research Institute of Chalco Henan Zhengzhou 450041 China

Alumina-based composites containing 0-15wt% Ni metallic phase were produced by hot press-sintering Ni-coated alumina powders. The Ni-coated alumina powders were prepared by the aqueous heterogeneous precipitation of alumina micro-powders and nickel sulfate salt followed by reduction process. The microstructural features and dispersion of Ni phase in Ni-coated alumina powders and the subsequent alumina-Ni cermets were investigated using scanning electron microscope （SEM）, X-ray diffractometer （XRD）, and transmission electron microscope （TEM）. The relative density of the hot press-sintered composites was measured with the Archimedes＇ method while the fracture strength and the fracture toughness were defined with the three-point bending method and the micro-indentation fracture method. In the formation of alumina-Ni cermets from sintered Ni-coated alumina powders, Ni phase to some extent limits the densification rate and stifles the coarsening and growing process of alumina grains. The Ni phase is found to be located at the interfaces and the triple-joint junctions of alumina grains which results into alteration of the fracture mode of alumina and its increased fracture strength and fracture toughness if compared with monolithic alumina.

关键词： alumina-based composite Ni-coated alumina powder heterogeneous precipitation Ni dispersion

Tracing the provenance of aeolian loess in the Yangtze River Delta through zircon U–Pb age and geochemical investigations

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Journal of Mountain Science 2018年第4期15卷 708-721页

作者： QIAN Peng ZHENG Xiang-min CHENG Jun HAN Yu-jie dong Yan ZHANG jian-guo School of Geography Nantong University Department of Geography East China Normal University School of Geosciences University of South Florida

Given the conflicts over the proposed formation mechanisms of Xiashu loess, the question of the provenance of sediments comprising the Xiashu loess in the Yangtze River Delta has not been satisfactorily resolved. In this study, the provenance of aeolian sediments of the Yangtze River Delta, China was examined by applying the detrial zircon U–Pb dating technique, Sr–Nd isotopic and trace element compositional analysis. U-Pb dating analysis was conducted on the Xiashu loess at three locations over the Yangtze River Delta, including Huangnishan(HNS) hill, Shengshan(SS) island and the Xuancheng(XC) area. The Xiashu loess and the sediments of the Yangtze River Valley share considerable similarity in their zircon U-Pb age spectra with the same main age peak and comparable age distribution. By contrast, significant differences in the age spectra, existbetween the Xiashu loess and loess deposits of Chinese Loess Plateau(CLP). Coarse grains of the Yangtze River Delta loess may have a proximal material source identical to the sediments from the Yangtze River valley. Sr–Nd isotopic values of the Xiashu loess match those from the northern margin of the Tibetan Plateau. Rare earth element ratios independent of grain size illustrate that the values from loess of the Yangtze River Delta mostly overlap with those of CLP loess. This feature implies that loess from the Yangtze River Delta has a dominant source of distant material similar as the CLP loess. As such, we conclude that multi-proxy analysis of sediments can shed new light on tracing the provenance of aeolian loess in the Yangtze River Delta.

关键词： Aeolian loess Provenance tracing Zircon U-Pb age Geochemistry Yangtze River Delta