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Formation and transformation of metastable LPSO building blocks clusters in Mg-Gd-Y-Zn-Zr alloys by spinodal decomposition and heterogeneous nucleation

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Journal of Magnesium and Alloys 2024年第2期12卷 673-686页

作者： Xin Zhao Zhong Yang Jiachen Zhang Minxian Liang liying wang School of Materials Science and Chemical Engineering Xi’an Technological UniversityXi’an 710021China Xi’an Tianli Metal Composite Material Co.Ltd. Xi’an 710299China

To study the formation and transformation mechanism of long-period stacked ordered(LPSO)structures,a systematic atomic scale analysis was conducted for the structural evolution of long-period stacked ordered(LPSO)structures in the Mg-Gd-Y-Zn-Zr alloy annealed at 300℃~500℃.Various types of metastable LPSO building block clusters were found to exist in alloy structures at different temperatures,which precipitate during the solidification and homogenization *** stability of Zn/Y clusters is explained by the first principles of density functional *** LPSO structure is distinguished by the arrangement of its different Zn/Y enriched LPSO structural units,which comprises local fcc stacking sequences upon a tightly packed *** presence of solute atoms causes local lattice distortion,thereby enabling the rearrangement of Mg atoms in the different configurations in the local lattice,and local HCP-FCC transitions occur between Mg and Zn atoms occupying the nearest neighbor *** finding indicates that LPSO structures can generate necessary Schockley partial dislocations on specific slip surfaces,providing direct evidence of the transition from 18R to *** of the LPSO,devoid of any defects and non-coherent interfaces,was observed separately from other precipitated *** a result,the precipitation sequence of LPSO in the solidification stage was as follows:Zn/Ycluster+Mg layers→various metastable LPSO building block clusters→18R/24R LPSO;whereas the precipitation sequence of LPSO during homogenization treatment was observed to be as follows:18R LPSO→various metastable LPSO building block clusters→14H *** these,14H LPSO was found to be the most thermodynamically stable structure.

关键词： LPSO Spinodal decomposition Homogenization treatment Clusters Phase transformation

Ring-Opening Copolymerization of Biorenewable -Caprolactone with trans-Hexahydro-(4,5)-benzofuranone toward Closed-Loop Recyclable Copolyesters and Their Application as Pressure- Sensitive Adhesives

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Chinese Journal of Chemistry 2024年第17期42卷 2035-2042页

作者： Haining Niu liying wang Zihan Zhang Yalei Liu Yong Shen Zhibo Li State Key Laboratory Base of Eco-Chemical Engineering College of Chemical EngineeringQingdao University of Science and TechnologyQingdaoShandong266042China Key Laboratory of Biobased Polymer Materials Shandong Provincial Education DepartmentQingdao University of Science and TechnologyQingdaoShandong266042China

Copolymerization as an efficient strategy can provide an opportunity to create new closed-loop recyclable polymeric materials with tailored properties that are generally inaccessible to the individual *** this contribution,the bulk ring-opening copolymerization of bio-renewable-caprolactone and trans-hexahydro-(4,5)-benzofuranone was achieved to produce closed-loop recyclable copolyesters by using an organobase/urea binary catalyst at room *** obtained copolyesters exhibited composition-dependent thermal ***,the obtained copolyesters were able to depolymerize back to recover the corresponding monomers under mild conditions.

关键词： Recyclable polymers Ring-opening polymerization Copolymerization Pressure-sensitive adhesives Aliphatic polyesters

Poly(ferulic acid)nanocarrier enhances chemotherapy sensitivity of acute myeloid leukemia by selectively targeting inflammatory macrophages

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Chinese Chemical Letters 2024年第9期35卷 289-295页

作者： Weijian Zhang Xianyu Deng liying wang Jian wang Xiuting Guo Lianggui Huang Xinyi wang Jun Wu Linjia Jiang Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation Sun Yat-sen Memorial HospitalSun Yat-sen UniversityGuangzhou 510120China Department of Otolaryngology Sun Yat-sen Memorial HospitalSun Yat-sen UniversityGuangzhou 510120China Department of Hematology The Seventh Affiliated HospitalSun Yat-sen UniversityShenzhen 518107China Department of Pediatrics Sun Yat-sen Memorial HospitalSun Yat-sen UniversityGuangzhou 510120China Bioscience and Biomedical Engineering Thrust The Hong Kong University of Science and Technology(Guangzhou)NanshaGuangzhou 511400China Division of Life Science The Hong Kong University of Science and TechnologyHong Kong SAR 999077China

Macrophages,as a subset of innate immune cells,play a pivotal role in the initiation,maintenance,and resolution of inflammatory responses during tissue damage repair,defense against infections,and tumor ***,the mechanisms by which macrophages regulate inflammation in acute myeloid leukemia(AML)and their involvement in the chemotherapeutic effect remain *** this study,we have identified that AML cells stimulate macrophage expansion by activating the colony-stimulating factor 1 receptor(CSF1R)*** expanded macrophages activate nuclear factor kappa-B(NFκB)to induce the expression of inflammatory factors,thereby maintaining leukemic cell quiescence and promoting cell survival following ***,we have successfully utilized a poly(ferulic acid)nanocarrier to selectively target macrophages for inhibiting the NFκB-mediated inflammation,ultimately enhancing chemotherapy efficacy against *** together,our findings highlight the crucial role of macrophage-induced inflammation in conferring chemoresistance to AML,and demonstrate the potential of a targeted nanocarrier specifically designed for inflammatory macrophages to improve the AML chemotherapeutic outcomes.

关键词： Acute myeloid leukemia Chemoresistance Macrophage Inflammation NFκB

Effects of long-term partial substitution of inorganic fertilizer with pig manure and/or straw on nitrogen fractions and microbiological properties in greenhouse vegetable soils

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Journal of Integrative Agriculture 2024年第6期23卷 2083-2098页

作者： Shuo Yuan Ruonan Li Yinjie Zhang Hao'an Luan Jiwei Tang liying wang Hongjie Ji Shaowen Huang State Key Laboratory of Efficient Utilization of Arid and Semi-arid Arable Land in Northern China/Institute of Agricultural Resources and Regional Planning Chinese Academy of Agricultural SciencesBeijing 100081China Institute of Agricultural Resources and Environment Hebei Academy of Agriculture and Forestry SciencesShijiazhuang 050051China College of Resources and Environment Henan Agricultural UniversityZhengzhou 450002China College of Forestry Hebei Agricultural UniversityBaoding 071000China

Partial substitution of inorganic fertilizers with organic amendments is an important agricultural management *** 11-year field experiment(22 cropping periods)was carried out to analyze the impacts of different partial substitution treatments on crop yields and the transformation of nitrogen fractions in greenhouse vegetable *** treatments with equal N,P_(2)O_(5),and K_(2)O inputs were selected,including complete inorganic fertilizer N(CN),50%inorganic fertilizer N plus 50%pig manure N(CPN),50%inorganic fertilizer N plus 25%pig manure N and 25%corn straw N(CPSN),and 50%inorganic fertilizer N plus 50%corn straw N(CSN).Organic substitution treatments tended to increase crop yields since the 6th cropping period compared to the CN *** the 8th to the 22nd cropping periods,the highest yields were observed in the CPSN treatment where yields were 7.5-11.1%greater than in CN *** 11-year fertilization,compared to CN,organic substitution treatments significantly increased the concentrations of NO_(3)^(-)-N,NH_(4)^(+)-N,acid hydrolysis ammonium-N(AHAN),amino acid-N(AAN),amino sugar-N(ASN),and acid hydrolysis unknown-N(AHUN)in soil by 45.0-69.4,32.8-58.1,49.3-66.6,62.0-69.5,34.5-100.3,and 109.2-172.9%,*** analysis indicated that soil C/N and OC concentration significantly affected the distribution of N *** highest concentrations of NO_(3)^(-)-N,AHAN,AAN,AHUN were found in the CPSN *** substitution treatments increased the activities ofβ-glucosidase,β-cellobiosidase,N-acetyl-glucosamidase,L-aminopeptidase,and phosphatase in the *** substitution treatments reduced vector length and increased vector angle,indicating alleviation of constraints of C and N on soil *** substitution treatments increased the total concentrations of phospholipid fatty acids(PLFAs)in the soil by 109.9-205.3%,and increased the relative abundance of G^(+)bacteria and fungi taxa,but decreased the relat

关键词： organic substitution management greenhouse vegetable production N fractions microbial community composition extracellular enzyme activity enzyme stoichiometry coefficients

Research Progress of Measuring Tools for Patient Medication Compliance

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Journal of Biosciences and Medicines 2024年第2期12卷 225-235页

作者： Chengping Jian Xiangdong Peng Haiyan Tian liying wang Yanan Zhang Defang Cai School of Nursing Dali University Dali China Department of Cardiothoracic Surgery Mianyang Central Hospital Mianyang China Nursing Department of Yuxi People’s Hospital Yuxi China

This paper introduced the content, compilation process, reliability and validity, scoring method of the evaluation tool for patients’ medication compliance at home and abroad, and reviewed the research progress of the tool. The evaluation method, dimension, scoring method, evaluation content and application scope of the tool were compared, so as to provide reference for nurses to comprehensively and accurately evaluate patients’ medication status.

关键词： Medication Compliance Assessment Tool Research Progress

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企业标准创新网络突破技术锁定的路径研究

科研管理 2024年第8期45卷 73-82页

作者：高鲜鑫王黎萤浙江工业大学中国中小企业研究院浙江杭州310023 浙江工业大学管理学院浙江杭州310023

工业互联网产业的创新发展面临诸多标准创新融通和关键技术锁定的挑战。本文选择海尔工业互联网为研究对象,运用纵向单案例研究方法,从标准创新视角探索工业互联网企业的技术锁定突破路径。研究发现:工业互联网企业技术锁定突破是不断... 详细信息

工业互联网产业的创新发展面临诸多标准创新融通和关键技术锁定的挑战。本文选择海尔工业互联网为研究对象,运用纵向单案例研究方法,从标准创新视角探索工业互联网企业的技术锁定突破路径。研究发现:工业互联网企业技术锁定突破是不断进行标准创新以应对组织内外部环境变化的过程,首先基于资源依赖关系和网络嵌入层级的动态交互实现了标准创新网络的构建,继而遵循“标准创新网络构建-标准化能力提升-技术锁定突破”的路径逻辑。具体来看,经历了三个阶段,相应构建了学习型标准创新网络、探索型标准创新网络和主导型标准创新网络,先后形成了标准跟踪能力、标准参与能力与标准主导能力,分别促进了低端技术模仿、关键技术逆向工程与核心技术自主研发的技术锁定突破。转型阶段的演进机制分别是标准参与制定机制和标准引领主导机制。研究结论为工业互联网企业突破技术锁定困境提供了新的实践路径与启示。

关键词：中国式现代化突破技术锁定标准创新网络工业互联网

基于δ-己内酯的多臂星形热塑性弹性体的合成和性质

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功能高分子学报 2024年第3期37卷 196-204页

作者：朱玉玲王丽颖沈勇青岛科技大学化工学院山东青岛266042

以生物基单体δ-己内酯(δCL)和L-丙交酯(L-LA)为原料,以三羟甲基丙烷或季戊四醇为引发剂,通过一锅法顺序加料方式制备了具有明确结构的(PδCL-b-PLLA)n多臂星形嵌段共聚物。使用小角X射线散射表征了(PδCL-b-PLLA)n的微相分离结构。通... 详细信息

以生物基单体δ-己内酯(δCL)和L-丙交酯(L-LA)为原料,以三羟甲基丙烷或季戊四醇为引发剂,通过一锅法顺序加料方式制备了具有明确结构的(PδCL-b-PLLA)n多臂星形嵌段共聚物。使用小角X射线散射表征了(PδCL-b-PLLA)n的微相分离结构。通过单轴拉伸和循环拉伸实验,研究了拓扑结构对(PδCL-b-PLLA)n多臂星形嵌段共聚物力学性能的影响。结果表明:在分子量相同的情况下,星形嵌段共聚物具有比相应的ABA线形嵌段共聚物更高的断裂强度、弹性回复率以及更低的残留应变;与四臂星形嵌段共聚物相比,三臂星形嵌段共聚物表现出更好的拉伸性和弹性回复性。

关键词：热塑性弹性体嵌段共聚物星形高分子聚酯开环聚合

知识产权与标准协同推进人工智能产业创新机制与路径优化

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科学学与科学技术管理 2024年第4期45卷 52-67页

作者：王黎萤赵春苗王举铎文佳浙江工业大学中国中小企业研究院杭州310023 嘉兴大学商学院嘉兴314001 浙江工业大学管理学院杭州310023

第四次工业革命加速了各产业间以人工智能技术为核心的创新生态构建,其中知识产权裹挟的技术标准先行已成为人工智能产业创新的新型竞争规则,“技术垄断”“标准规锁”“联盟割裂”等正成为人工智能产业创新发展的“卡脖子”问题,因此... 详细信息

第四次工业革命加速了各产业间以人工智能技术为核心的创新生态构建,其中知识产权裹挟的技术标准先行已成为人工智能产业创新的新型竞争规则,“技术垄断”“标准规锁”“联盟割裂”等正成为人工智能产业创新发展的“卡脖子”问题,因此加强人工智能知识产权保护与运用、技术标准主导与引领对加速推进人工智能产业创新至关重要。以解决“人工智能产业如何通过标准和知识产权的协同实现创新发展”为问题导向,通过对海康威视、百度、英特尔等公司的案例研究,构建了知识产权保护、标准主导与联盟载体生态协同推进人工智能产业创新发展的作用机制,分析了3种作用机制在人工智能产业渐进式创新、整合式创新、突破式创新范式中的组合运用和协同互动差异,提出实现人工智能产业创新发展的“赶超”、“跃迁”、“自立自强”3条路径优化,结果发现:(1)多维交互的知识产权与标准和联盟载体的互动机制是推进自主可控的人工智能产业创新发展的关键动因。(2)多元架构的联盟载体作用差异是影响知识产权与标准协同推进人工智能产业创新生态演进的重要因素。(3)多阶段共生竞合是知识产权与标准协同推进人工智能产业创新生态演进的发展路径。最后,从中国情境下知识产权与标准协同推进人工智能产业创新发展实践出发,提出了宏观、产业和企业层面的对策建议。

关键词：知识产权标准联盟载体人工智能产业产业创新

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镁锂合金中LPSO相的研究进展

材料导报 2024年第20期38卷 217-226页

作者：段逸飞王建利袁满王礼营杨忠李菲田皓西安工业大学材料与化工学院西安710021 中国船舶重工集团公司第十二研究所陕西兴平713102 西安天力金属复合材料股份有限公司西安710299

与其他金属结构材料相比,被称为超轻材料的镁锂合金具有超低密度、高塑性、高比强度、高比刚度及良好的阻尼减震等优异性能,是航空航天、武器装备等对质量密度极其敏感的高端制造领域的理想材料。然而绝对强度过低,尤其是强化相容易发... 详细信息

与其他金属结构材料相比,被称为超轻材料的镁锂合金具有超低密度、高塑性、高比强度、高比刚度及良好的阻尼减震等优异性能,是航空航天、武器装备等对质量密度极其敏感的高端制造领域的理想材料。然而绝对强度过低,尤其是强化相容易发生过时效导致性能大幅下降,严重限制了其多场景、规模化的生产应用。近年来在Mg-RE-TM合金中发现的长周期有序堆垛结构(LPSO相),具有较高的强度与热稳定性,能够有效提高镁合金的强度、塑性及高温抗蠕变性能,同时还可改善合金耐蚀性、电磁屏蔽性及阻尼减震性能等,为Mg-Li合金的强韧化及功能性结构材料的研发提供了新思路。本文在简要总结LPSO相的结构类型与形成机理的基础上,综述了含LPSO相镁锂合金组织和性能的国内外研究现状,并指出了未来研究工作的重点发展方向,以期为含LPSO相新型镁锂合金的开发和性能调控提供参考。

关键词：镁锂合金长周期有序堆垛结构显微组织力学性能耐蚀性能

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