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Improving Thermal-oxidative Aging Resistance of styrene-butadiene Rubber by Antioxidant Loaded silica Aerogel

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Chinese Journal of Polymer science 2024年第8期42卷 1198-1209页

作者： Xue-Fei ping Yu Wang Lu Liu Fu-Yong Liu Hong-Wei He pi Wang Wen-Wen Yu Qiang Zheng College of Materials science and Engineering Taiyuan University of TechnologyTaiyuan 030024China shanxi-Zheda Institute of Advanced Materials and Chemical Engineering Taiyuan 030032China Key Laboratory of Macromolecular synthesis and Functionalization Department of Polymer Science and EngineeringZhejiang UniversityHangzhou 310058China

The antioxidant N-isopropyl-N'-phenyl-p-phenylenediamine(4010NA)was dissolved in ethanol and impregnated into silica aerogel(sAG)via vacuum-pressure cycles,yielding composite particles(A-N)with enhanced sustained-release and reinforcing *** effect of A-N on the mechanical properties and thermal-oxidative aging resistance of styrene-butadiene rubber(sBR)vulcanizates was *** and BET assessments indicated that the loading efficiency of 4010NA in sAG reached 14.26%within ethanol's solu bility *** A-N into sBR vulcanizates significantly elevated tensile strength by 17.5%and elongation at break by 41.9%over those with fumed silica and ***,A-N notably enhanced the thermal-oxidative aging resistance of *** aging for 96 h at 100℃,the tensile strength and elongation at break of sBR with A-N sustained 70.09%and 58.61%of their initial values,respectively,with the retention rate of elongation at break being 62.8%higher than that of sBR with fumed silica and free *** study revealed that A-N composite particles significantly inhibited the crosslinking in sBR's molecular chains,reducing hardening and embrittlement during later thermal-oxidative aging stages.

关键词： styrene-butadiene rubber silica aerogel Loading modification Thermal-oxidative aging

suppression of Cs FAD3 in a JA-dependent manner, but not through the sA pathway, impairs drought stress tolerance in tea

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Journal of Integrative Agriculture 2024年第11期 3737-3750页

作者： Na Chang Xiaotian pi Ziwen Zhou Yeyun Li Xianchen Zhang state Key Laboratory of Tea Plant Biology and Utilization Anhui Agricultural University

The growth and yield of tea plants are seriously limited by drought stress. Fatty acid desaturases（FADs） contribute to the mediation of membrane fluidity in response to different stresses, although the role of ω-3 FAD（Omega-3fatty acid desaturase）-mediated damage induced by drought stress in tea plants is poorly understood. In this study,drought stress significantly promoted the synthesis of C18:3（linolenic acid） and the expression level of *** experiments further demonstrated that CsFAD3 can convert C18:2 to C18:3, and that the 35s:GFP-CsFAD3fusion protein was localized in the endoplasmic reticulum of Nicotiana benthamiana cells. CsFAD3-silenced tea leaves exhibited poor drought tolerance, with a lower Fv/Fmand a higher malondialdehyde（MDA） content than the control plants. However, transgenic 35s:CsFAD3 Arabidopsis plants showed the opposite phenotypes. In addition,the jasmonic acid（JA） content and the expression levels of CsLOX2, CsLOX4, CsAOs, CsAOC3 and CsOPR2 were significantly reduced in CsFAD3-silenced leaves under drought stress. However, no substantial difference in the salicylic acid（sA） content was detected under normal or drought conditions. An analysis of Atcoi1（JA receptor） or Atnpr1（sA receptor） mutant Arabidopsis plants in 35s:CsFAD3 backgrounds further revealed that knockout of Atcoi1impaired the drought-tolerant phenotypes of CsFAD3 overexpression lines. Therefore, this study demonstrated that CsFAD3 plays a crucial role in drought tolerance by mediating JA pathways.

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欧盟《人工智能法》中的风险防控机制及对我国的镜鉴

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比较法研究 2024年第4期 67-85页

作者：皮勇同济大学上海国际知识产权学院

欧盟《人工智能法》是世界上第一部促进人工智能安全发展的区域性国际法律文件,将人工智能系统定性为自主性工具,立足于人工智能安全风险全球化视角,以保障本土安全与发展利益为导向,规定了针对不同类型人工智能安全风险的、全过程多方... 详细信息

欧盟《人工智能法》是世界上第一部促进人工智能安全发展的区域性国际法律文件,将人工智能系统定性为自主性工具,立足于人工智能安全风险全球化视角,以保障本土安全与发展利益为导向,规定了针对不同类型人工智能安全风险的、全过程多方协同防控机制。该法根据风险的类别和大小程度,将防控对象分为禁止的人工智能活动、人工智能系统和通用人工智能模型三大类六小类,分别采取禁止和不同程度的管控措施,重点防控高风险人工智能系统和通用人工智能模型的安全风险。以上防控机制主要通过规定人工智能安全管理义务及其处罚规定来实现,重点规定了高风险人工智能系统和通用人工智能模型的要求及相关方的安全管理义务,并对违反不同义务的自然人、公司以及欧盟机构、部门或实体设置了与行为人类型及义务相称的罚款。我国制定人工智能安全立法应考虑借鉴该法的成功经验,同时避免其出现的防控不全面不充分、法律责任制度存在缺漏、风险防控责任分配不合理等缺点。

关键词：欧盟《人工智能法》风险类型化全程协同防控安全管理义务

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Endoscopic-ultrasound-guided biliary drainage with placement of electrocautery-enhanced lumen-apposing metal stent for palliation of malignant biliary obstruction:Updated meta-analysis

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World Journal of Gastrointestinal surgery 2024年第3期16卷 907-920页

作者： Zu-Xiang Peng Fang-Fang Chen Wen Tang Xu Zeng Hong-Juan Du Ru-Xian pi Hong-Ming Liu Xiao-Xiao Lu Department of Hepatobiliary surgery Daping HospitalArmy Medical UniversityChongqing 400042China Department of Oncology Chongqing General HospitalChongqing UniversityChongqing 401147China Department of Gastroenterology and Hepatobiliary surgery People’s Hospital of Fenggang CountyGuizhou 564200Guizhou ProvinceChina Hepatobiliary and Pancreatic Tumor Center Chongqing University Cancer HospitalChongqing 400030China

BACKGROUND Endoscopic ultrasound-guided biliary drainage using electrocautery-enhanced(ECE)delivery of lumen-apposing metal stent(LAMs)is gradually being re-cognized as a viable palliative technique for malignant biliary obstruction after endoscopic retrograde cholangiopancreatography(ERCP)***,most of the studies that have assessed its efficacy and safety were small and *** meta-analyses of six or fewer studies that were published 2 years ago were therefore underpowered to yield convincing *** To update the efficacy and safety of ECE-LAMs for treatment of biliary ob-struction after ERCP *** We searched PubMed,EMBAsE,and scopus databases from the inception of the ECE technique to May 13,*** outcome measure was pooled technical success rate,and secondary outcomes were pooled rates of clinical success,re-intervention,and adverse ***-analysis was performed using a random-effects model following Freeman-Tukey double-arcsine transformation in R soft-ware(version 4.1.3).REsULTs Fourteen eligible studies involving 620 participants were ultimately *** pooled rate of technical success was 96.7%,and clinical success was 91.0%.Adverse events were reported in 17.5%of *** reinter-vention rate was 7.3%.subgroup analyses showed results were generally *** ECE-LAMs has favorable success with acceptable adverse events in relieving biliary obstruction when ERCP is *** consistency of results across most subgroups suggested that this is a generalizable approach.

关键词： Biliary obstruction Biliary drainage Electrocautery-enhanced lumen-apposing metal stents Endoscopic ultrasound Endoscopic retrograde cholangiopancreatography failure

DNA Methylation Variation Is Identified in Monozygotic Twins Discordant for Congenital Heart Diseases

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Congenital Heart Disease 2024年第2期19卷 247-256页

作者： shuliang Xia Huikang Tao shixin su Xinxin Chen Li Ma Jianru Li Bei Gao Xumei Liu Lei pi Jinqing Feng Fengxiang Li Jia Li Zhiwei Zhang Guangdong Provincial People’s Hospital Southern Medical UniversityGuangzhou510100China Department of Cardiovascular surgery Guangzhou Women and Children’s Medical CenterGuangzhou Medical UniversityGuangdong Provincial Clinical Research Center for Child HealthGuangzhou510623China Department of Pediatric Cardiology Guangdong Cardiovascular InstituteGuangdong Provincial Key Laboratory of South China Structural Heart DiseaseGuangzhou510100China Clinical Physiology Laboratory Institute of PediatricsGuangzhou Women and Children’s Medical CenterGuangzhou Medical UniversityGuangdong Provincial Key Laboratory of Research in Structural Birth Defect DiseaseGuangzhou510623China Department of Echocardiogram Guangzhou Women and Children’s Medical CenterGuangzhou Medical UniversityGuangdong Provincial Clinical Research Center for Child HealthGuangzhou510623China Department of Pediatrics Washington University School of MedicineSt.LouisMO63130USA Clinical Biological Resource Bank of Guangzhou Women and Children’s Medical Center Guangzhou Medical UniversityGuangzhou510623China

Aims:Multiple genes and environmental factors are known to be involved in congenital heart disease(CHD),but epigenetic variation has received little ***(MZ)twins with CHD provide a unique model for exploring this *** order to investigate the potential role of Deoxyribonucleic Acid(DNA)methyla-tion in CHD pathogenesis,the present study examined DNA methylation variation in MZ twins discordant for CHD,especially ventricular septal defect(VsD).Methods and Results:Using genome-wide DNA methylation profiles,we identified 4004 differentially methylated regions(DMRs)in 18 MZ twin pairs discordant for CHD,and 2826 genes were *** Ontology(GO)and Kyoto Encyclopedia of Genes and Genomes(KEGG)analysis revealed a list of CHD-associated *** further investigate the role of DNA methylation in VsD,data from 7 pairs of MZ twins with VsD were *** identified 1614 DMRs corresponding to 1443 genes associated with arrhythmogenic right ventricular cardiomyopathy,cyclic guanosine monopho-sphate-protein kinase G(cGMP-PKG)signaling pathway by KEGG analysis,and cell-cell adhesion,calcium ion transmembrane transport by GO analysis.A proportion of DMR-associated genes were involved in calcium signaling *** methylation changes of calcium signaling genes might be related to VsD ***:CHD is associated with differential DNA methylation in MZ *** may be etiologically linked to DNA methylation,and methylation of calcium signaling genes may be involved in the development of VsD.

关键词： Congenital heart disease monozygotic twins methylation modification epigenetics

从《教学通义》白的内在困境看康有为的经学转向

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哲学动态 2024年第4期 34-41页

作者：皮迷迷首都师范大学哲学系

康有为从以《教学通义》为代表的古文经学立场转向以“两考”为标志的今文经学立场,前人多将之归因于廖平的影响和康有为上书清帝失败等外部因素。然而,以《教学通义》中的内在困境为线索,可以看到,此种转变自有其内在动因,即康有为对... 详细信息

康有为从以《教学通义》为代表的古文经学立场转向以“两考”为标志的今文经学立场,前人多将之归因于廖平的影响和康有为上书清帝失败等外部因素。然而,以《教学通义》中的内在困境为线索,可以看到,此种转变自有其内在动因,即康有为对建立一个完整、统一经学体系的诉求。由于廖平的“二变”处理了经学中周公、孔子的矛盾,帮助康有为克服了他在《教学通义》中的理论困境,实现了经学体系的一统。因此,康有为果断接受了廖平“二变”中以古学为刘歆所伪的结论,实现了他的经学转向。

关键词：康有为廖平《教学通义》经学转向

论梅兰芳美、苏公演宣传材料中理论话语建构之变异

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文化遗产 2024年第1期 90-97页

作者：冯伟皮野山东大学外国语学院山东济南250100

三十年代梅兰芳为其美国和苏联公演准备了大量介绍性的外文材料。材料多由团队写作与翻译,系在世界戏剧的潮流和出访国政治、文化等语境的他者视阈下,对何为戏曲、戏曲特质等问题的理论话语建构。通过细读和话语分析,并聚焦几个关键词... 详细信息

三十年代梅兰芳为其美国和苏联公演准备了大量介绍性的外文材料。材料多由团队写作与翻译,系在世界戏剧的潮流和出访国政治、文化等语境的他者视阈下,对何为戏曲、戏曲特质等问题的理论话语建构。通过细读和话语分析,并聚焦几个关键词的翻译,可以发现,梅兰芳团队的言说内容与策略因目标受众而发生了变异,且有别于国内原有的话语。然而,观念的变异不代表内在的分裂,而意味着共时层面戏曲现代性追求面貌的多元和历时层面对戏曲认知的不断完善。材料虽然针对的是外国读者,但也潜藏了与国内批评者的隔空对话,其最终目的是巩固戏曲在国内的地位,争取更多的话语空间。

关键词：梅兰芳海外公演话语戏曲

新型基础设施影响劳动工资和工资差距的内在机制

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经济理论与经济管理 2024年第1期44卷 121-136页

作者：皮建才范衍玮南京大学经济学院 210093

本文从新型基础设施的产品偏向性出发,在一般均衡框架下探讨了新型基础设施影响劳动工资和工资差距的内在机制。研究发现,新型基础设施直接带来的效率提升可以促进各类劳动工资增长,但间接导致的要素重新配置可能产生不同的结果,总效应... 详细信息

本文从新型基础设施的产品偏向性出发,在一般均衡框架下探讨了新型基础设施影响劳动工资和工资差距的内在机制。研究发现,新型基础设施直接带来的效率提升可以促进各类劳动工资增长,但间接导致的要素重新配置可能产生不同的结果,总效应取决于资本与各类劳动之间的替代性以及技能型中间品与非技能型中间品之间的替代性。结合中国的实际情况,技能型产品偏向型的新型基础设施可能导致工资差距扩大,但可以带来劳动工资的“普惠性”增长。

关键词：新型基础设施产品偏向性技能型劳动工资非技能型劳动工资工资差距

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国家文化公园超级情绪价值的表征与作用机制

兰州大学学报(社会科学版) 2024年第4期52卷 106-118页

作者：皮彦芳傅才武武汉大学国家文化发展研究院

随着物质生活水平的不断提高，人们的情绪需求越来越强烈，情绪价值成为具有巨大拓展潜力的价值维度。国家文化公园作为彰显国家品质的巨型文旅体验空间和中华文化重要标识，理论上具有超越一般旅游目的地的情绪价值，可更好地给人以积... 详细信息

随着物质生活水平的不断提高，人们的情绪需求越来越强烈，情绪价值成为具有巨大拓展潜力的价值维度。国家文化公园作为彰显国家品质的巨型文旅体验空间和中华文化重要标识，理论上具有超越一般旅游目的地的情绪价值，可更好地给人以积极情绪和情感满足。对长江国家文化公园武汉段九个代表性景点的考察表明，国家文化公园可在情绪层面诱发敬畏情绪，进而在情感层面强化国家认同，具有长时效、广覆盖、多向度的超级情绪价值。对国家文化公园展示的壮美自然山川、丰富历史文化、先辈才华气节的认知评价，可以诱发敬畏情绪；国民文化认知和国家文化认知在向国家认同升华的过程中发挥链式中介作用。因此，在国家文化公园建设中，应加强文化旅游资源的遴选与整合，国民文化提炼展示和国家文化宣传推广，敬畏情绪和国家认同的研究、测量、评估，从而更好地实现其超级情绪价值。

关键词：国家文化公园旅游目的地情绪价值敬畏情绪国家认同