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Tribological behavior of thermal- and pH-sensitive microgels under steel/CoCrMo alloy contacts

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Friction 2023年第4期11卷 602-616页

作者： Kequn SUN Yuanhua HU Yinghui DONG lulu yao Ruhong SONG Yufu XU Institute of Tribology School of Mechanical EngineeringHefei University of TechnologyHefei 230009China School of Chemistry and Chemical Engineering Hefei University of TechnologyHefei 230009China

The tribological behavior of 316L stainless steel/CoCrMo alloy contacts under aqueous lubrication was investigated in this *** types of microgels including poly(N-isopropylacrylamide)(PNIPAM),polyacrylic acid(PAA),and poly(N-isopropylacrylamide-co-acrylic acid)(PNIPAM-co-PAA)were prepared and used as lubricant additives in aqueous *** tests were conducted using a ball-on-disk reciprocating tribometer,over a range of temperatures,pH,and concentrations of the *** PNIPAM-co-PAA microgels were proven to have excellent anti-friction and anti-wear properties,depending on the temperature and pH values of the *** maximum friction coefficient coincided with the lower critical solution temperature of the PNIPAM-co-PAA microgels at 32°*** the same time,the friction coefficient increased with the increase in pH value of the lubricant solution with the PNIPAM-co-PAA *** unique thermal-and pH-sensitive properties of the PNIPAM-co-PAA microgels provided a new strategy for controlling the friction and wear of steel/CoCrMo alloy contacts under aqueous lubrication.

关键词： poly(N-isopropylacrylamide-co-acrylic acid)(PNIPAM-co-PAA) microgel aqueous lubrication thermal-sensitive pH-sensitive

Enhanced magnetic properties of anisotropic Nd-Fe-B nanocomposites by Fe(C)coating

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Journal of Rare Earths 2020年第1期38卷 84-89页

作者： Fengqing Wang Guiping Tang Baoru Bian lulu yao Youhao Liu Qiang Zheng Juan Du CAS Key Laboratory of Magnetic Materials and Devices Ningbo Institute of Material Technology and EngineeringChinese Academy of Sciences(CAS)Ningbo 315201China State Key Laboratory of Rare Earth Permanent Magnetic Materials Hefei 231500China School of Materials and Chemical Engineering Ningbo University of TechnologyNingbo 315211China

Nanostructured anisotropic Nd-Fe-B/Fe(C) composite powders were prepared by coating Fe(C) softmagnetic nanoparticles on HDDR Nd-Fe-B hard magnetic powders using iron pentacarbonyl Fe(CO)5 as soft-phase *** effect of Fe(CO)5-loading amount on soft-phase purity,coating morphology and magnetic properties of the composite powders was *** and continuous Fe(C) softphase coatings with average particle sizes of 58-68 nm are obtained at Fe(CO)5 loading amounts of x <12 wt%,leading to enhanced remanence and improved energy product of the coated *** value in δM-plots and single-phase-like demagnetization curves are observed in the Nd-Fe-B/Fe(C) composite powders,indicating the exchange coupling effect between the coated Fe(C) soft phases and the Nd-Fe-B hard phase.

关键词： Permanent magnet Anisotropy Nanocompo site Coating Thermal decomposition Rare earths

What do we know about IL-6 in COVID-19 so far?

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Biophysics Reports 2021年第3期7卷 193-206页

作者： Jingrui Jiang Jun Wang lulu yao Shenghan Lai Xueji Zhang Tongji Medical College Huazhong University of Science and Technology National 111 Center for Cellular Regulation and Molecular Pharmaceutics Department of Biomedicine and Biopharmacology Hubei University of Technology Department of Pathology Johns Hopkins University School of Medicine Guangdong Laboratory of Artificial Intelligence and Digital Economy (SZ) School of Biomedical EngineeringShenzhen University

Interleukin 6(IL-6) is a cytokine with dual functions of pro-inflammation and anti-inflammation. It is mainly produced by mononuclear macrophages, Th2 cells, vascular endothelial cells and fibroblasts. IL-6 binds to glycoprotein 130 and one of these two receptors, membrane-bound IL-6 R or soluble IL-6 R,forming hexamer(IL-6/IL-6 R/gp130), which then activates different signaling pathways(classical pathway, trans-signaling pathway) to exert dual immune-modulatory effects of anti-inflammation or pro-inflammation. Abnormal levels of IL-6 can cause multiple pathological reactions, including cytokine storm. Related clinical studies have found that IL-6 levels in severe COVID-19 patients were much higher than in healthy population. A large number of studies have shown that IL-6 can trigger a downstream cytokine storm in patients with COVID-19, resulting in lung damages, aggravating clinical symptoms and developing excessive inflammation and acute respiratory distress syndrome(ARDS).Monoclonal antibodies against IL-6 or IL-6 R, such as tocilizumab, sarilumab, siltuximab and olokizumab may serve as therapeutic options for COVID-19 infection.

关键词： IL-6 IL-6R Cytokine storm COVID-19 Monoclonal antibody

Surface characterization of steel/steel contact lubricated by PA06 with novel black phosphorus nanocomposites

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Friction 2021年第4期9卷 723-733页

作者： Zhiheng LUO Jingyuan YU Yufu XU He XI Gang CHENG lulu yao Ruhong SONG Karl D DEARN Institute of Tribology School of Mechanical EngineeringHefei University of TechnologyHefei 230009China School of Chemistry and Chemical Engineering Hefei University of TechnologyHefei 230009China Mason Institute of Tribology School of Engineering University of BirminghamEdgbastonBirmingham B152TTUnited Kingdom

In the present work,two types of novel nano additives,titanium sulfonate ligand/black phosphorus(TiLi/BP)and titanium dioxide/black phosphorus(TiCVBP)nanocomposites,were *** tribological behavior of the steel/steel friction pairs lubricated by polyalphaolefins type 6(PA06)containing the nanocomposites under boundary lubrication was *** worn surfaces were analyzed using modem surface *** experimental results show that the rubbed surfaces became smooth and showed little wear with the addition of the ***_(2)/BP nanocomposites can significantly improve the lubricity of BP nanosheets under high contact *** synergistic roles of the load-bearing abilities and rolling effect of TiO_(2) nanoparticles,the slip induced by the BP with its layered structure,and the establishment of a tribofilm on the sliding interface are the basis of the tribological mechanisms.

关键词： surface characterization black phosphorus(BP)nanosheets nano titanium dioxide boundary lubrication steel/steel contact

Measuring the Capability of Biological Incident Rescue Teams in China:A Fuzzy Analytic Hierarchy Process Based Model-Tianjin Municipality,China,2022-2023

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China CDC weekly 2023年第41期5卷 922-926,I0005-I0007页

作者： Zichen Zhou lulu yao Shike Hou Yan Zhou Chao Zhao Song Bai Nan Li Tiantian Li Yongzhong Zhang College of Management and Economy Tianjin UniversityTianjinChina Institute of Disaster and Emergency Medicine Tianjin UniversityTianjinChina School of Pharmaceutical Science and Technology Tianjin UniversityTianjinChina Center for Biosafety Research and Strategy Tianjin UniversityTianjinChina

Introduction:The swift advancement of biotechnology has presented both opportunities and challenges to our society,thrusting biosafety to the forefront of ***,the evaluation of rescue capabilities in the event of a bioterrorism incident becomes of paramount ***,there is a notable absence of specific measurement criteria and a comprehensive evaluation *** paper aims to establish a systematic approach towards assessing emergency response capabilities in the context of bioterrorism ***:We employed an enhanced Delphi methodology to establish an index evaluation ***,the weight of the judgment matrix was ascertained via the application of the fuzzy comprehensive evaluation *** led to the creation of a fuzzy comprehensive evaluation model for bioterrorism rescue ***:A modified Delphi study was conducted involving 11 experts across two rounds,achieving a response rate of 100%.The Kendall coordination coefficients recorded in the first and second rounds were 0.303 and 0.632,respectively(P<0.05).Upon comprehensive analysis involving score,coefficient of variation,and full score ratio,we distinguished five primary indicators and 25 secondary ***,an evaluation model was developed based on the Analytic Hierarchy Process(AHP)tailored to assess the response to a rescue from ***:The expert panel confirmed consensus on all aspects of the model,validating its comprehensive *** succeeding course of action involves converting the assessment model to a measurable scale,affirming its functionality,and implementing it in practical evaluation tasks to further enhance the capabilities of the biological incident rescue team.

关键词： Rescue fir Fuzzy

EIN3 suppresses plants de novo root regeneration from leaf explants and mediates age-regulated regeneration decline

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EIN3 suppresses plants de novo root regeneration from leaf e...

第三届全国植物开花·衰老与采后生物学大会

作者： Hong Li lulu yao Lili Sun Ziqiang Zhu College of Life Sciences Nanjing Normal University

Powerful regeneration ability enables plants survival when plants are wounded. For example, adventitious roots can regenerate from the cutting site in detached Arabidopsis thaliana leaf explants even in the absence of any exogenous plant hormone treatment. This process is known as de novo root regeneration（DNRR）. Although the developmental program underlying DNRR is revealed, the precise regulatory mechanisms during DNRR are not completely understood. Here, we show that ethylene treatment or genetic activation of transcription factor ETHYLENE INSENSITIVE 3（EIN3） strongly suppresses DNRR rates, while a mutant lacking EIN3 and its homolog EIL1（ein3 eil1） displays a higher DNRR capacity. Previous reports have shown that the sequential induction of WUSCHEL RELATED HOMEOBOX 11（WOX11）/WOX12 and WOX5/WOX7 expression is required for the establishment of DNRR. We found that EIN3 directly targets WOX11 and WOX5 promoter regions to suppress their transcription. Furthermore, older plants show enhanced EIN3 activity, and repressed expression of WOX11 and WOX5. Taken together, these results illustrate that plant aging at least partially takes advantage of EIN3 as a negative regulator to suppress DNRR through inhibiting the activation of WOX genes.

关键词： EIN3 WOX11 WOX5 transcriptional repression root regeneration

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不同低聚多元醇软段结构水性聚氨酯膜的制备

高分子材料科学与工程 2018年第5期34卷 143-148页

作者：姚路路席涛崔鹏合肥工业大学化学与化工学院安徽合肥230009

分别以相对分子质量均为2000的聚丙二醇(PPG)、聚四氢呋喃醚二醇(PTMG)、聚己二酸己二醇酯二醇(PHA)和聚己二酸乙二醇酯二醇(PEA)为软段原料,以异佛尔酮二异氰酸酯(IPDI)和小分子多元醇、小分子多元胺为硬段原料制备了系列水性聚氨脂(W... 详细信息

分别以相对分子质量均为2000的聚丙二醇(PPG)、聚四氢呋喃醚二醇(PTMG)、聚己二酸己二醇酯二醇(PHA)和聚己二酸乙二醇酯二醇(PEA)为软段原料,以异佛尔酮二异氰酸酯(IPDI)和小分子多元醇、小分子多元胺为硬段原料制备了系列水性聚氨脂(WPU)膜。通过红外光谱、动态力学热分析,以及溶胀和溶解选择因子、渗透汽化分离苯/环己烷测试对膜的结构和性能进行了表征。研究表明,WPU-PTMG膜硬段结合紧密,WPU-PPG膜溶胀率和渗透汽化通量较大;WPU-PEA膜的酯基密度较大,微相分离程度较高,对苯的亲和性最好;WPU-PHA膜的酯基密度小于WPU-PEA膜,其溶胀率和渗透汽化通量大于WPU-PEA。

关键词：水性聚氨酯软段结构渗透汽化

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《骨》:家园回忆的模仿与身份生产的再现

外国语文 2018年第3期34卷 41-47页

作者：姚璐璐重庆理工大学外国语学院重庆400054

"回忆的模仿"指文学的模仿和诗意两方面的特质。在文学文本中,"回忆不可能真正被仿造",而可以通过叙述技巧的运用得以演示。美国华裔作家伍慧明通过小说《骨》之"回忆的模仿"演绎了"黄色太平洋的故事",动态再现美国华裔跨越大洋的杂糅... 详细信息

"回忆的模仿"指文学的模仿和诗意两方面的特质。在文学文本中,"回忆不可能真正被仿造",而可以通过叙述技巧的运用得以演示。美国华裔作家伍慧明通过小说《骨》之"回忆的模仿"演绎了"黄色太平洋的故事",动态再现美国华裔跨越大洋的杂糅文化身份的生产。小说以富有象征意义的"骨"之意象贯穿家园空间,并以此为切入口,采用记忆、空间、后殖民等跨学科交叉视角,沿着小说《骨》中对"回忆的模仿"的演示,探析作为散居族裔的梁家两代美国华裔移民文化身份的生产过程——从"华裔移民共同体"的"同一"身份构建、夹在"源文化"与"现文化"之间"分裂身份"的创伤到"杂糅身份"的缝合,其间隐含的是美国华裔"朝内航行"后殖民抵抗策略的构建与运用。

关键词：骨家园回忆美国华裔文化身份创伤后殖民

水性聚氨酯膜渗透蒸发分离苯/环己烷的条件及过程

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化工学报 2016年第S1期67卷 289-295页

作者：姚路路叶辉宋影崔鹏合肥工业大学化学与化工学院安徽合肥230009

以聚己二酸1,4-丁二醇酯二醇(PBA-2000)和甲苯二异氰酸酯(TDI)为主要原料合成水性聚氨酯膜,并对苯/环己烷混合液渗透蒸发性能进行测试,讨论了苯/环己烷混合体系的渗透蒸发分离过程特点。结果表明,当膜厚度增大时,分离因子提高而渗透通... 详细信息

以聚己二酸1,4-丁二醇酯二醇(PBA-2000)和甲苯二异氰酸酯(TDI)为主要原料合成水性聚氨酯膜,并对苯/环己烷混合液渗透蒸发性能进行测试,讨论了苯/环己烷混合体系的渗透蒸发分离过程特点。结果表明,当膜厚度增大时,分离因子提高而渗透通量随之下降,这个变化趋势在膜较薄时很明显,达到一定厚度后则变化比较平缓;膜下游侧真空度提高会同时提高膜的分离因子和通量;增大料液中苯的浓度,提高料液温度会提高通量并降低分离因子。液体被分离组分在渗透蒸发膜中经历了吸附溶胀—膜内汽化—气体扩散的质量传递过程,"干区"对分离的影响作用更加显著。

关键词：水性聚氨酯膜渗透蒸发苯/环己烷传递过程