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| 1 | Improving the Corrosion Resistance of ZEK100 Magnesium Alloy by Combining High-Pressure Torsion Technology with Hydroxyapatite Coating显示文摘Recently,magnesium and its alloys have attracted more and more attention as promising implant materials due to their excellent properties such as good biocompatibility,biodegradation,non-toxicity and comparable mechanical properties with natural bone.They can be gradually degraded and absorbed so as to avoid the second surgery for implants removal after the tissues are healed completely.In addition,they are also able to prevent the stress shielding effect in human body environment because of the density,elastic modulus and yield strength of magnesium closer to the bone.Unfortunately,the high corrosion rate which causes early mechanical failure of the implants in physiological environment limits the widespread use of magnesium alloys for clinical application in biology.And the high corrosion process usually causes huge hydrogen evolution and alkalinization,resulting in problems against the implants as well as the surrounding tissues.In order to enhance the corrosion resistance of magnesium alloys,in this study,the ZEK100 magnesium alloy was pre-deformed with a highpressure torsion(HPT)process and then fabricated hydroxyapatite(HA)coatings with different contents of Mg(OH)2 nanopowder via hydrothermal method.The specimens were characterized by scanning electron microscope(SEM)and X-ray diffraction(XRD).At the same time,prior and after the HPT procedure,the metallography,microhardness and tensile tests of specimens were characterized.Meanwhile,the corrosion behavior of the specimens was evaluated by electrochemical impedance spectroscopy(EIS)and hydrogen evolution tests.And the interface bonding strength of the HA coating on the magnesium alloy substrate was evaluated by a tape adhesion test/scratch test.Results showed that HPT processing refined the grain size and introduced a great number of twins,resulting in the enhancement of microhardness and Young’s modulus of ZEK100 magnesium alloy,but hardness values at the edge were higher than those at the center due to the uneven shear strain.At the same conditions,the HA coating on HPT-ZEK was denser,thicker than that on ZEK sample and the crystal sizes of HA were smaller on HPT-ZEK.These were attributed to fine,uniform distributed secondary phases and lots of fine grains,twins,grain boundaries in HPT-ZEK substrates which can provide more nucleation sites for the HA crystal.In terms of the amount of Mg(OH)2 nanopowder,Mg(OH)2 nanopowder significantly influenced the microstructure and thickness of the HA coating.And at a 0.3 mg/mL content of Mg(OH)2 nanopowder,there was the densest,thickest HA coating on magnesium alloys,and the crystal size of HA was minimum.Specifically,the HA coating thickness on ZEK-03(0.3 mg/mL Mg(OH)2 nanopowder)was 1.8 times of that on ZEK-00(0 mg/mL Mg(OH)2 nanopowder),while the HA coating thickness on HPT-03 was 2.6 times of that on ZEK-00.And the adhesion strength of HA coating on HPT-03 substrate was better than that on ZEK-03.In addition,HPT technology and surface modification by HA coating simultaneously increased the corrosion resistance of ZEK100 magnesium alloy and the corrosion of HPT-ZEK samples occurred in a more uniform manner,while it was pitting on the surface of ZEK100 magnesium alloy.Therefore,there was the best corrosion resistance on HPT-03 sample,which could promote the application of magnesium alloys in biomedical fields. | Qite Li Wenbo Ye Hong Gao Lilan Gao | 2019 | 医用生物力学2019，34，A01： | 5 |
| 2 | Study on RS-and GIS-based ecological capital assessment in arid areas显示文摘生态的大写的评价当前是生态学,资源经济,环境经济和生态的经济的学科交差的领域里的重要研究内容之一。为了科学地估计生态的资本,增加到决策人在经济开发考虑生态的费用,并且为在干旱区域的持续经济开发也是必要的。基于风景生态学的理论,在这篇论文生态的资本在干旱区域珍视的per 单位区域被使用 Landsat TM 数据, CBERS 卫星数据,气象学的数据, MODIS 卫星数据和另外的生态的数据研究,并且 RS --并且在干旱区域估计生态的大写的价值的官方补给底的模型被开发。而且基于测量地的数据,在在威信河盆的生态的大写的评价以后的案例研究,在 2003 的 Xinjiang 被执行。盆被划分成 4 个生态的大写的区域以便份量上计算生态系统的生态的大写的价值,分析生态的资本的空间分发,并且制定生态的资本的空间分发的地图。结果证明在在 2003 的威信河盆的生态系统的全部的生态的大写的价值是 1.494 54 癮 吗?? | ZHOU Kefa CHEN Xi ZHOU Huarong ZHANG Qing ZUO Qiting ZHANG Haibo YAN Jinfeng CHEN Chuan | 2006 | Chinese Science Bulletin2006，51，A01： | 3 |
| 3 | A low-cost green approach for synthesis of lead oxide from waste lead ash for use in new lead-acid batteries显示文摘This paper proposes a novel method relating to the recycling of waste lead ash originated from procedure of lead alloy production.The spent lead ash was first disposed by acetic acid leaching system,where lead ash structure wrapping impurities would be destroyed.The synthesis of lead oxide products was conducted at a lower temperature of 90℃.The effect of molar ratio of CH3 COOH to lead content of the ash on leaching efficiency was studied through the acetic acid leaching system.The results demonstrate that 84.6%of lead could be obtained in the leaching solution,while merely 0.7%of Fe blend in solution within a leaching time of 120 min.In the stage of lead oxide synthesis from leaching solution,the yield of lead oxide products could reach up to 94.4%when the molar ratio of NaOH to lead in filtrate was 2.5.This novel green method could shed light on the reuse of lead from exhausted ash with a much more convenient and environmentally friendly procedure. | Wei Zhang Gang Tang Xiaoqin Xiang Renyu Wang Shuangquan Gao Xinfeng Zhu Qiting Zuo | 2019 | Chinese Journal of Chemical Engineering2019，27，7： | 2 |
| 4 | China pursues a strict water resources management system显示文摘 | Qiting Zuo Runfang Jin Junxia Ma Guotao Cui | 2014 | Environmental Earth Sciences2014，，6： | 2 |
| 5 | Deformation of titaniumalloy Ti- 6AI-dV under dynamic compression 显示文摘 | Zhao Qite Wu Guoqing Sha Wei | 2010 | Computational Materials Science2010，50，： | 1 |
| 6 | Influence of graphene on the anti-corrosion performance of epoxy-based coatings显示文摘In this work,graphene-modified epoxy-based anti-corrosion coatings were prepared and the influence of graphene on the anti-corrosion performance of the epoxy-based coatings was investigated with water contact angle test,chemical solution immersion test,and electrochemical test.The water contact angle and chemical solution resistance of the epoxy-based coatings were improved with an increase in graphene content from 0 to 0.4%.These results prove that addition of graphene can significantly improve the hydrophobicity and impermeability of epoxybased coatings.However,when the graphene content was increased to 0.5%,the performance of the epoxy-based coatings decreased because of graphene aggregation.Tafel polarization results showthat graphene addition can significantly reduce the corrosion current density and corrosion potential of epoxy-based coatings,which enhance their anti-corrosion performance. | DONG Ying LU Qiting YAO Qisheng | 2016 | Baosteel Technical Research2016，10，3： | 1 |
| 7 | Deformation of Titanium Al- loy Ti-6AI-4V under Dynamic Compression 显示文摘 | Zhao Qite Wu Guoqing Sha Wei | 2010 | Computational Materials Science2010，50，2： | 1 |
| 8 | Chemical leaks contaminate Chineseriver: viewing environmental emergency response of China显示文摘 | ZUO Qiting CUI Guotao | 2013 | Environmental Earth Sciences2013，69，8： | 1 |
| 9 | Experi- mental Analysis of the Impact of Sluice Regulation on Water Quality in the Highly Polluted Huai River Basin, China 显示文摘 | Zuo Qiting Chen Hao Dou Ming | 2015 | Environmental Monitoring and Assessment2015，187，45： | 1 |
| 10 | Physically-based Model for Studying the Salinization of the Bosten Lake in China显示文摘 | Zuo Qiting Dou Ming Chen Xi Zhou Kefa | 2006 | Hydrological sciences Journal2006，51，3： | 1 |
| 11 | Physically-based model for studying the salinization of the Bosten Lake in China 显示文摘 | Zuo Qiting Dou Ming Chen Xi | 2006 | Hydrological Sciences Journal2006，51，3： | 1 |
| 12 | Concept and model of 'supporting capacity of water resources' in urban areas显示文摘 | Zuo Qiting Ma Junxia Wu Zening | 2005 | Sustainable Water Management Solutions for Large Cities IAHS Publication2005，293，： | 1 |
| 13 | Climate Change and its Impact on Water Resources in the Huai River Basin显示文摘Rainfall and air temperature data from six meteorological stations above the Bengbu Sluice and hydrological and water resources evaluation data from the Bengbu Hydrological Station in the Huai River Basin from 1961 to 2008 are used to analyze the impact of changes in climatic factors on the amount of water resources in the Basin. There was a general trend of rise in its average annual air temperature, with the highest increase of 0.289oC/10a recorded at Bengbu in Anhui Province. Rising rainfall was mainly observed in the western part of the study area, while rainfall actually declined in the eastern part, i.e. the middle reaches of the Huai River. The Average rainfall in the study area was in a vaguely declining trend. In other words, the rainfall in the Basin is still much affected by natural fluctuations. On the whole, there was a trend of gradual decrease in the quantity of the Basin's water resources for the period under study. Water resources quantity is found to fall with decreasing rainfall and rising air temperature. Regression analysis is used to establish a mathematical model between water resources quantity and climatic factors (i.e. air temperature and rainfall) in order to explore the impact of climate change on water resources in the Basin. Moreover, various scenarios are set to quantitatively analyze the response of water resources to climate change. Sensitivity analysis shows that changes in rainfall have a much bigger impact on its water resources quantity than changes in its air temperature. | ZUO Qiting CHEN Yaobin TAO Jie | 2012 | Bulletin of the Chinese Academy of Sciences2012，26，1： | 1 |
| 14 | Concept and Model of Supporting Capacity of Water Resources in Urban Areas显示文摘 | Zuo Qiting Ma Junxia Wu Zening | 2005 | Sustainable Water Management Solutions for Large Cities IAHS Publication2005，293，： | 1 |
| 15 | Synthesis of an amine terminated polyether:effects of the activation conditions on a Raney nickel catalyst显示文摘 | Lijuan Zhang Qiting Lu Yibin Hou | 2013 | Reaction Kinetics Mechanisms and Catalysis2013，108，： | 1 |
| 16 | Blockage of ATPase-mediated energy supply inducing metabolic disturbances in algal cells under silver nanoparticles stress显示文摘Adenosine triphosphate(ATP)generation of aquatic organisms is often subject to nanoparticles(NPs)stress,involving extensive reprogramming of gene expression and changes in enzyme activity accompanied by metabolic disturbances.However,little is known about the mechanism of energy supply by ATP to regulate the metabolism of aquatic organisms under NPs stress.Here,we selected extensively existing silver nanoparticles(AgNPs)to investigate their implications on ATP generation and relevant metabolic pathways in alga(Chlorella vulgaris).Results showed that ATP content significantly decreased by 94.2%of the control(without AgNPs)in the algal cells at 0.20 mg/L AgNPs,which was mainly attributed to the reduction of chloroplast ATPase activity(81.4%)and the downregulation of ATPase-coding genes atpB and atpH(74.5%-82.8%)in chloroplast.Molecular dynamics simulations demonstrated that AgNPs competed with the binding sites of substrates adenosine diphosphate and inorganic phosphate by forming a stable complex with ATPase subunit beta,potentially resulting in the reduced binding efficiency of substrates.Furthermore,metabolomics analysis proved that the ATP content positively correlated with the content of most differential metabolites such as D-talose,myo-inositol,and L-allothreonine.AgNPs remarkably inhibited ATPinvolving metabolic pathways,including inositol phosphate metabolism,phosphatidylinositol signaling system,glycerophospholipid metabolism,aminoacyl-tRNA biosynthesis,and glutathione metabolism.These results could provide a deep understanding of energy supply in regulating metabolic disturbances under NPs stress. | Ruohua Qu Mi Chen Jingfu Liu Qiting Xie Na Liu Fei Ge | 2023 | Journal of Environmental Sciences2023，，9： | 1 |
| 17 | Synthesis of sarmentosin显示文摘 | Zhou Qiting Bai Donglu | 1999 | Acta Pharmaceutica sinica1999，34，1： | 1 |
| 18 | Influence of Twinning Texture on the Corrosion Fatigue Behavior of Extruded Magnesium Alloys显示文摘Bio-magnesium alloys have received great attention due to their degradability and biocompatibility.Corrosion fatigue failure is a huge challenge in vivo for bio-magnesium alloy implants.Understanding the eff ects of twinning textures on the corrosion fatigue of magnesium alloys is meaningful for the applications.In the current study,pre-compression strains of 2%and 4%were carried out on extruded rods.The effects of twinning texture on the corrosion performance and corrosion fatigue resistance were investigated.The hydrogen evolution tests indicated that twinning texture enhanced the corrosion resistance of longitudinal cross section by improving uniformity of surface energy.The results of corrosion fatigue tests indicated that the differences in mechanical damage caused by twinning texture dominated the corrosion fatigue behavior under high stress amplitude.The secondary cracks of surface deteriorated the corrosion fatigue resistance of the original specimens under low stress amplitude.The compact corrosion film and the re-passivation of matrix suppressed the hydrogen induced cracking,thereby improving the corrosion fatigue resistance of the pre-compression specimens. | Jiaqi Hu Qite Li Hong Gao | 2021 | Acta Metallurgica Sinica(English Letters)2021，34，1： | 0 |
| 19 | Land use/land cover change responses to ecological water conveyance in the lower reaches of Tarim River,China显示文摘The Tarim River is the longest inland river in China and is considered as an important river to protect the oasis economy and environment of the Tarim Basin.However,excessive exploitation and over-utilization of natural resources,particularly water resources,have triggered a series of ecological and environmental problems,such as the reduction in the volume of water in the main river,deterioration of water quality,drying up of downstream rivers,degradation of vegetation,and land desertification.In this study,the land use/land cover change(LUCC)responses to ecological water conveyance in the lower reaches of the Tarim River were investigated using ENVI(Environment for Visualizing Images)and GIS(Geographic Information System)data analysis software for the period of 1990-2018.Multi-temporal remote sensing images and ecological water conveyance data from 1990 to 2018 were used.The results indicate that LUCC covered an area of 2644.34 km^(2) during this period,accounting for 15.79%of the total study area.From 1990 to 2018,wetland,farmland,forestland,and artificial surfaces increased by 533.42 km^(2)(216.77%),446.68 km^(2)(123.66%),284.55 km^(2)(5.67%),and 57.51 km^(2)(217.96%),respectively,whereas areas covered by grassland and other land use/land cover types,such as Gobi,bare soil,and deserts,decreased by 103.34 km2(14.31%)and 1218.83 km2(11.75%),respectively.Vegetation area decreased first and then increased,with the order of 2010<2000<1990<2018.LUCC in the overflow and stagnant areas in the lower reaches of the Tarim River was mainly characterized by fragmentation,irregularity,and complexity.By analyzing the LUCC responses to 19 rounds of ecological water conveyance in the lower reaches of the Tarim River from 2000 to the end of 2018,we proposed guidelines for the rational development and utilization of water and soil resources and formulation of strategies for the sustainable development of the lower reaches of the Tarim River.This study provides scientific guidance for optimal scheduling of water resources in the region. | WANG Shanshan ZHOU Kefa ZUO Qiting WANG Jinlin WANG Wei | 2021 | Journal of Arid Land2021，13，12： | 0 |
| 20 | Transcriptome-wide profiling of RNA N^(4)-cytidine acetylation in Arabidopsis thaliana and Oryza sativa显示文摘Acetylation of N^(4)-cytidine(ac^(4)C)has recently been discovered as a novel modification of mRNA.RNA ac^(4)C modification has been shown to be a key regulator of RNA stability,RNA translation,and the thermal stress response.However,its existence in eukaryotic mRNAs is still controversial.In plants,the existence,distribution pattern,and potential function of RNA ac^(4)C modification are largely unknown.Here we report the presence of ac^(4)C in the mRNAs of both Arabidopsis thaliana and rice(Oryza sativa).By comparing two ac^(4)C sequencing methods,we found that RNA immunoprecipitation and sequencing(acRIP-seq),but not ac^(4)C sequencing,was suitable for plant RNA ac^(4)C sequencing.We present transcriptome-wide atlases of RNA ac^(4)C modification in A.thaliana and rice mRNAs obtained by acRIP-seq.Analysis of the distribution of RNA ac^(4)C modifications showed that ac^(4)C is enriched near translation start sites in rice mRNAs and near translation start sites and translation end sites in Arabidopsis mRNAs.The RNA ac^(4)C modification level is positively correlated with RNA half-life and the number of splicing variants.Similar to that in mammals,the translation efficiency of ac^(4)C target genes is significantly higher than that of other genes.Our in vitro translation results confirmed that RNA ac^(4)C modification enhances translation efficiency.We also found that RNA ac^(4)C modification is negatively correlated with RNA structure.These results suggest that ac^(4)C is a conserved mRNA modification in plants that contributes to RNA stability,splicing,translation,and secondary structure formation. | Bin Li Donghao Li Linjun Cai Qiting Zhou Cong Liu Jianzhong Lin Yixing Li Xiaoying Zhao Li Li Xuanming Liu Chongsheng He | 2023 | Molecular Plant2023，16，6： | 0 |
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