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MoS_(2)Lubricate‑Toughened MXene/ANF Composites for Multifunctional Electromagnetic Interference Shielding

Nano-micro Letters 2025年第2期17卷 358-371页

作者： Jiaen wang Wei ming Longfu Chen Tianliang Song Moxi Yele Hao Zhang Long Yang Gegen Sarula Benliang Liang Luting Yan Guangsheng wang School of Physical Science and Engineering Beijing Jiaotong UniversityBeijing 100044People’s Republic of China Key Laboratory of Bio‑Inspired Smart Interfacial Science and Technology of ministry of Education School of ChemistryBeihang UniversityBeijing 100191People’s Republic of China

The design and fabrication of high toughness electromagnetic interference(Emi)shielding composite films with diminished reflection are an imperative task to solve electromagnetic pollution *** MXene/ANF(aramid nanofibers)–MoS_(2)composite films with nacre-like layered structure here are fabricated after the introduction of MoS_(2)into binary MXene/ANF composite *** introduction of MoS_(2)fulfills an impressive“kill three birds with one stone”improvement effect:lubrication toughening mechanical performance,reduction in secondary reflection pollution of electromagnetic wave,and improvement in the performance of photothermal *** the introduction of MoS_(2)into binary MXene/ANF(mass ratio of 50:50),the strain to failure and tensile strength increase from 22.1±1.7%and 105.7±6.4 MPa and to 25.8±0.7%and 167.3±9.1 MPa,*** toughness elevates from 13.0±4.1 to 26.3±0.8 MJ m^(−3)(~102.3%)*** the reflection shielding effectiveness(SE_(R))of MXene/ANF(mass ratio of 50:50)decreases~10.8%.Emi shielding effectiveness(Emi SE)elevates to 41.0 dB(8.2–12.4 GHz);After the introduction of MoS_(2)into binary MXene/ANF(mass ratio of 60:40),the strain to failure increases from 18.3±1.9%to 28.1±0.7%(~53.5%),the SE_(R)decreases~22.2%,and the corresponding Emi SE is 43.9 *** MoS_(2)also leads to a more efficient photothermal conversion performance(~45 to~55℃).Additionally,MXene/ANF–MoS_(2)composite films exhibit excellent electric heating performance,quick temperature elevation(15 s),excellent cycle stability(2,2.5,and 3 V),and long-term stability(2520 s).Combining with excellent mechanical performance with high MXene content,electric heating performance,and photothermal conversion performance,Emi shielding ternary MXene/ANF–MoS_(2)composite films could be applied in many industrial *** work broadens how to achieve a balance between mechanical properties and versatility of composites in the case of high-function fillers.

关键词： MXene-MoS_(2) Lubrication toughening Emi shielding Photothermal conversion Electric heating performance

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Regulation of graphdiyne-based nanozymes with enhanced oxidaselike activity by cobalt and nitrogen codoping

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Nano Research 2025年第1期18卷 21-29页

作者： Jiali Liu Xiaoli wang Yongfu Lian Xue wang Xiuxiu wang Xingfa Gao Baoyun Sun Xihong Guo CAS Key Laboratory for Biomedical Effects of Nanomaterial&Nanosafety Institute of High Energy PhysicsChinese Academy of ScienceBeijing 100049China Key Laboratory of Functional Inorganic Material Chemistry Ministry of EducationSchool of Chemistry and Materials ScienceHeilongjiang UniversityHarbin 150080China Laboratory of Theoretical and Computational Nanoscience National Center for Nanoscience and TechnologyBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China

The development of nanozymes with excellent intrinsic oxidase-like activity and specificity has received increasing ***(GDY)could be a promising choice for designing nanozymes with enhanced oxidase(OXD)-like activity due to its unique structure and ***,Co-N-GDY with high OXD activity but no peroxidase(POD)activity was synthesized by codoping of cobalt(Co)and nitrogen(N)into GDY and compared with other GDY-based nanozymes(including GDY,Co-GDY,and N-GDY).Upon analyzing the doping effect of Co and N on the OXD-like and POD-like activities,we found that the combination of Co and N in GDY played a significant role in enhancing the OXD-like activity,and even reversed the POD-like activity of N-GDY to OXD-like activity of *** electrochemical experiment and the theoretical calculations provided an explanation for the mechanism and showed that the activity was closely linked to the reduction ability of O_(2) or H_(2)O_(2) on the nanozyme substrates,which was determined by the ratedetermining step of the catalytic reaction.

关键词： nanozymes oxidase-like activity graphdiyne heteroatom doping regulation

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Evaluation of maize root growth and genome-wide association studies of root traits in response to low nitrogen supply at seedling emergence

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The Crop Journal 2021年第4期9卷 794-804页

作者： Xichao Sun Wei Ren Peng wang Fanjun Chen Lixing yuan Qingchun Pan Guohua mi College of Resources and Environmental Sciences National Academy of Agriculture Green DevelopmentKey Laboratory of Plant-Soil InteractionsMinistry of EducationChina Agricultural UniversityBeijing 100193China Agro-Environmental Protection Institute Ministry of Agriculture and Rural AffairsTianjin 300191China

Nitrogen(N) deficiency is one of the main factors limiting maize(Zea mays L.) productivity. Genetic improvement of root traits could improve nitrogen use efficiency. An association panel of 461 maize inbred lines was assayed for root growth at seedling emergence under high-nitrate(HN, 5 mmol L^(-1))and low-nitrate(LN, 0.05 mmol L^(-1)) conditions. Twenty-one root traits and three shoot traits were measured. Under LN conditions, the root-to-shoot ratio, root dry weight, total root length, axial root length,and lateral root length on the primary root were all increased. Under LN conditions, the heritability of the plant traits ranged from 0.43 to 0.82, a range much wider than that of 0.27 to 0.55 observed under HN conditions. The panel was genotyped with 542,796 high-density single-nucleotide polymorphism(SNP) markers. Totally 328 significant SNP markers were identified using either mixed linear model(MLM) or general linear model analysis, with 34 detected by both methods. In the 100-kb intervals flanking these SNP markers, four candidate genes were identified. Under LN conditions, the protoporphyrinogen IX oxidase 2 gene was associated with total root surface area and the DELLA protein-encoding gene was associated with the length of the visible lateral root zone of the primary root. Under HN conditions, a histone deacetylase gene was associated with plant height. Under both LN and HN conditions, the gene encoding MA3 domain-containing protein was associated with the first whorl crown root number. The phenotypic and genetic information from this study may be exploited for genetic improvement of root traits aimed at increasing NUE in maize.

关键词： Genome-wide association study(GWAS) Nitrogen Maize Root

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木犀草素改善脊髓损伤大鼠血清诱导的心肌细胞死亡

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中国组织工程研究 2025年第1期29卷 38-43页

作者：张稳稳徐梦如田园张立飞师姝王宁原媛王丽郝海虎山西中医药大学第一临床学院山西省晋中市030600 山西医科大学第三医院山西白求恩医院山西医学科学院骨科山西省太原市030000 山西医科大学基础医学研究中心山西省晋中市030600 山西医科大学基础医学院病理教研室山西省晋中市030600

背景:脊髓损伤导致的心功能不全是脊髓损伤患者死亡的重要原因,但具体机制并不清楚。因此,揭示脊髓损伤患者出现心功能不全的机制对于提高患者的生存质量和生存率有重要意义。目的:探讨木犀草素改善脊髓损伤大鼠血清诱导心肌细胞死亡的... 详细信息

背景:脊髓损伤导致的心功能不全是脊髓损伤患者死亡的重要原因,但具体机制并不清楚。因此,揭示脊髓损伤患者出现心功能不全的机制对于提高患者的生存质量和生存率有重要意义。目的:探讨木犀草素改善脊髓损伤大鼠血清诱导心肌细胞死亡的作用机制。方法:使用Allen’s冲击仪损伤雄性SD大鼠脊椎T9-T11,进行脊髓损伤造模,设置假手术组作为对照,取各组大鼠血清。将H9c2细胞分为空白对照组、假手术大鼠血清组、脊髓损伤大鼠血清组以及木犀草素预处理组,空白对照组为普通培养基培养,假手术大鼠血清组使用含体积分数10%假手术大鼠血清的培养基培养,脊髓损伤大鼠血清组使用含体积分数10%脊髓损伤大鼠血清的培养基培养,木犀草素预处理组预先使用含有终浓度为20μmol/L木犀草素的培养基培养心肌细胞4 h,之后更换含体积分数10%脊髓损伤大鼠血清的培养基培养,培养24 h后使用CCK-8法检测各组H9c2心肌细胞的存活率,采用Western blot检测各组H9c2心肌细胞自噬相关蛋白LC3及p62的蛋白表达。结果与结论:与空白对照组相比,假手术大鼠血清组细胞存活率无明显改变(P>0.05);与假手术大鼠血清组相比,脊髓损伤大鼠血清组细胞存活率显著降低(P<0.01),LC3蛋白表达显著降低(P<0.05),p62蛋白表达显著升高(P<0.05);与脊髓损伤大鼠血清组相比,木犀草素预处理组细胞存活率明显回升(P<0.0001),LC3蛋白表达显著升高(P<0.05),p62蛋白表达显著降低(P<0.05)。结果表明:木犀草素可能通过促进自噬进而改善脊髓损伤大鼠血清诱导的心肌细胞死亡。

关键词：脊髓损伤血清 H9c2细胞自噬木犀草素心功能不全

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久坐与社区老年人下肢肌力:跌倒恐惧与年龄的中介和调节作用

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中国组织工程研究 2025年第17期29卷 3566-3571页

作者：洪金涛王晶晶李岩松王晨弭守玲上海体育科学研究所(上海市反兴奋剂中心) 上海市200030 青岛大学体育学院山东省青岛市266071 复旦大学附属中山医院心内科上海市心血管病研究所上海市200032 国家放射与治疗临床医学研究中心上海市200032 心脏病全国重点实验室上海市200032 国家卫生健康委缺血性心脏病重点实验室上海市200032 中国医学科学院病毒性心脏病重点实验室上海市200032

背景:人体老龄化进程中,下肢肌肉力量会随着年龄的增长呈现显著的生理性下降,久坐、跌倒恐惧、年龄与下肢肌力之间可能存在一定关联,但它们之间的影响路径与效应关系尚不明确。目的:探究社区老年人久坐和下肢肌肉力量之间的关系,并探讨... 详细信息

背景:人体老龄化进程中,下肢肌肉力量会随着年龄的增长呈现显著的生理性下降,久坐、跌倒恐惧、年龄与下肢肌力之间可能存在一定关联,但它们之间的影响路径与效应关系尚不明确。目的:探究社区老年人久坐和下肢肌肉力量之间的关系,并探讨跌倒恐惧和年龄在上述两者关系中的作用。方法:共招募331名60岁及以上的上海市社区老年人。采用问卷调查法收集基本信息、人口学资料等;采用国际身体活动问卷-短卷评估久坐时间,采用30 s坐站测试测量下肢肌力,采用中文版国际跌倒效能量表测评跌倒恐惧。对数据进行描述统计、相关分析、基于回归的路径分析和中介效应检验。结果与结论:最终以318名老年人[78.9%为女性,平均年龄(67.8±5.5)岁]的有效数据纳入分析,其中久坐时间≥3 h的185名,<3 h的133名。①久坐和跌倒恐惧呈正相关关系(P<0.01),下肢肌力和久坐(P<0.01)、跌倒恐惧(P<0.001)均呈负相关关系。②久坐显著负向预测下肢肌力(β=-0.125,P<0.05),久坐显著正向预测跌倒恐惧(β=0.182,P<0.01);跌倒恐惧显著负向预测下肢肌力(β=-0.293,P<0.001)。③跌倒恐惧在久坐和下肢肌力之间起中介作用(β=-0.053,95%CI:-0.100至-0.018)。④久坐对跌倒恐惧的预测效应具有统计学意义(β=0.164,P<0.01),这说明年龄调节了久坐对跌倒恐惧的影响。

关键词：老年群体老龄化肌肉萎缩肌肉力量久坐跌倒恐惧中介效应调节作用

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Stability improvement of human collagenα1(I)chain using insulin as a fusion partner

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Chinese Journal of Chemical Engineering 2018年第12期26卷 2607-2614页

作者： Yu mi yuan Gao Daidi Fan Zhiguang Duan Rongzhan Fu Lihua Liang Wenjiao Xue Shanshan wang Shaanxi R&D Center of Biomaterials and Fermentation Engineering School of Chemical Engineering Northwest UniversityXi'an 710069China Shaanxi Institute of microbiology Xi'an 710043China School of Biological Science and Engineering Shaanxi University of Technology Hanzhong 723001China

To enhance the stability of recombinant human collagen α1(I) chains(rhCOL1 A1) in production and purification stages, a gene fragment fusing COL1 A1 and insulin protein coding domains was synthesized and inserted into the pPIC9 K expression vector. The fusion peptide-expressing Pichia pastoris strain was created by *** optimization of shake flask cultures, the ultimate intracellular expression level of the insulin-collagen α1(I) chain fusion protein(INS-COL1 A1) reached about 300 mg·L^(-1), and no obvious protein degradation was found in the fermentation and purification processes. The His-tagged recombinant fusion protein was detected by western blotting and was effectively purified using Ni^(2+)-chelating chromatography. A prominent improvement in the stability of INS-COL1 A1 was observed compared to rhCOL1 A1 in vitro, and the rhCOL1 A1 released from the fusion protein was studied by LC–MS/MS and in bioassays. The results showed that the purified rhCOL1 A1 was consistent with the native protein in amino acid composition and had a similar biological compatibility. To our knowledge, this is the first study to demonstrate the use of insulin as a fusion protein to improve the stability of easily degradable proteins.

关键词： Fusion expression Human collagen α1(I) chain Insulin Protein stability Pichia pastoris

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Optimizing the key parameter to accelerate the recovery of AMOC under a rapid increase of greenhouse gas forcing

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Atmospheric and Oceanic Science Letters 2025年第1期18卷 39-45页

作者： Haolan Ren Fei Zheng Tingwei Cao Qiang wang International Center for Climate and Environment Science(ICCES) Institute of Atmospheric PhysicsChinese Academy of SciencesBeijingChina University of Chinese Academy of Sciences BeijingChina College of Oceanography Hohai UniversityNanjingChina CAS Key Laboratory of Ocean Circulation and Waves Institute of OceanologyChinese Academy of Sciences and Pilot National Laboratory for Marine Science and Technology(Qingdao)QingdaoChina

Atlantic Meridional Overturning Circulation(AMOC)plays a central role in long-term climate variations through its heat and freshwater transports,which can collapse under a rapid increase of greenhouse gas forcing in climate *** studies have suggested that the deviation of model parameters is one of the major factors in inducing inaccurate AMOC *** this work,with a low-resolution earth system model,the authors try to explore whether a reasonable adjustment of the key model parameter can help to re-establish the AMOC after its *** a new optimization strategy,the extra freshwater flux(FWF)parameter is determined to be the dominant one affecting the AMOC’s *** traditional ensemble optimal interpolation(EnOI)data assimilation and new machine learning methods are adopted to optimize the FWF parameter in an abrupt 4×CO_(2) forcing experiment to improve the adaptability of model parameters and accelerate the recovery of *** results show that,under an abrupt 4×CO_(2) forcing in millennial simulations,the AMOC will first collapse and then re-establish by the default FWF parameter ***,during the parameter adjustment process,the saltier and colder sea water over the North Atlantic region are the dominant factors in usefully improving the adaptability of the FWF parameter and accelerating the recovery of AMOC,according to their physical relationship with FWF on the interdecadal timescale.

关键词： Recovery of AMOC 4×CO_(2)forcing Key parameter Parameter estimation Data assimilation Machine learning

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Unraveling the significance of cobalt on transformation kinetics,crystallography and impact toughness in high-strength steels

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International Journal of minerals,Metallurgy and Materials 2025年第2期32卷 380-390页

作者： Yishuang Yu Jingxiao Zhao Xuelin wang Hui Guo Zhenjia Xie Chengjia Shang Collaborative Innovation Center of Steel Technology University of Science and Technology BeijingBeijing 100083China School of Materials Science and Engineering Shanghai Jiao Tong UniversityShanghai 200240China State Key Laboratory for Advanced Metals and Materials University of Science and Technology BeijingBeijing 100083China

This work reveals the significant effects of cobalt(Co)on the microstructure and impact toughness of as-quenched highstrength steels by experimental characterizations and thermo-kinetic *** results show that the Co-bearing steel exhibits finer blocks and a lower ductile-brittle transition temperature than the steel without ***,the Co-bearing steel reveals higher transformation rates at the intermediate stage with bainite volume fraction ranging from around 0.1 to *** improved impact toughness of the Co-bearing steel results from the higher dense block boundaries dominated by the V1/V2 variant ***,the addition of Co induces a larger transformation driving force and a lower bainite start temperature(BS),thereby contributing to the refinement of blocks and the increase of the V1/V2 variant *** findings would be instructive for the composition,microstructure design,and property optimization of high-strength steels.

关键词： high-strength steel cobalt transformation kinetics crystallography impact toughness

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Design of a cationic accelerator enabling ultrafast ion diffusion kinetics in aqueous zinc-ion batteries

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Journal of Energy Chemistry 2025年第1期100卷 377-384页

作者： Yawei Xiao Qianqian Gu Haoyu Li Mengyao Li Yude wang National Center for International Research on Photoelectric and Energy Materials School of Materials and Energy Yunnan University Key Laboratory of ministry of Education for Advanced Materials in Tropical Island Resources School of Chemistry and Chemical Engineering Hainan University College of Chemical Engineering Fuzhou University Yunnan Key Laboratory of Carbon Neutrality and Green Low-carbon Technologies Yunnan University

Aqueous zinc-ion batteries are highly favored for grid-level energy storage owing to their low cost and high safety,but their practical application is limited by slow ion *** address this,a strategy has been developed to create a cation-accelerating electric field on the surface of the cathode to achieve ultrafast Zn2+diffusion *** employing electrodeposition to coat MoS2on the surface of BaV6O16·3H2O nanowires,the directional built-in electric field generated at the heterointerface acts as a cation accelerator,continuously accelerating Zn2+diffusion into the active *** optimized Zn2+diffusion coefficient in CC@BaV-6O16·3H2O@MoS2(7.5×10～8cm2s-1) surpasses that of most reported V-based ***,MoS2serving as a cathodic armor extends the cycling life of the Zn-CC@BaV6O16·3H2O@MoS2full batteries to over 10000 *** work provides valuable insights into optimizing ion diffusion kinetics for high-performance energy storage devices.

关键词： Internal electric field Cationic accelerator Ion diffusion kinetics Cathode modification strategy Aqueous zinc ion battery

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Recombinant Human IgG antibodies against Human Cytomegalovirus

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Biomedical and Environmental Sciences 2008年第5期21卷 372-380页

作者： TAO DUAN XIAO-FANG wang SHU-yuan XIAO SHU-YAN GU AND mi-FANG LIANG Institute for Viral Disease Control and Prevention Chinese Center for Disease Control and Prevention Beijing 100052 China Department of Pathology and Center for Biodefence and Emerging Infectious Diseases University of Texas Medical Branch Galveston Texas 77555-0609. USA

Objective To study the passive immunization with human monoclonal antibodies as for prophylaxis of human cytomegalovirus （HCMV） infection. Methods Fab monoclonal antibodies to HCMV were recovered by repertoire cloning of mRNA from a HCMV infected individual. Antigen binding specificity, CDR sequence of VH and VL and neutralizing activity on HCMV AD169 stain were analyzed in vitro. The light and heavy chain Fd fragment genes of Fab antibodies were further cloned into a recombinant baculovirus expression vector pAC-K-Fc to express intact IgG. Secreted products were purified with affinity chromatography using protein G. Results SDS-PAGE and Western blot confirmed the expression of the intact IgG. Immuno-blotting and -precipitation were used to identify HCMV proteins. One Fab monoclonal antibody recognized a conformational HCMV protein. Conclusion IgG antibodies can neutralize the HCMV AD169 strain efficiently at a titer of 2.5 μg/mL and may prove valuable for passive immunoprophylaxis against HCMV infection in humans.

关键词： Human cytomegalovirus Human engineering antibody Phage display Recombinant baculovirus expression

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