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The dynamics beamline at SSRF

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Nuclear Science and techniques 2024年第9期35卷 56-67页

作者： Zhen Liu Li-Hua Wang Yong Jiang Ya-Jun Tong Hua-Chun Zhu te Ji Min Chen Zheng Jiang Xiang-Jun Wei Shanghai Advanced Research Institute Chinese Academy of SciencesShanghai 201204China Shanghaitech University Shanghai 201210China

The dynamics beamline(d-Line),which combines synchrotron radiation infrared spectroscopy(SR-IR)and energy-disper-sive X-ray absorption spectroscopy(Ed-XAS),is the first beamline in the world to realize concurrent Ed-XAS and SR-IR measurements at the same sample position on a millisecond time-resolved *** combined technique is effective for investigating rapid structural changes in atoms,electrons,and molecules in complicated disorder systems,such as those used in physics,chemistry,materials science,and extreme ***,Ed-XAS and SR-IR can be used independently in the two branches of the *** Ed-XAS branch is the first Ed-XAS beamline in China,which uses a tapered undulator light source and can achieve approximately 2.5×10^(12)photons/s·300 eV BW@7.2 keV at the sample *** exchange-able polychromator operating in the Bragg-reflection or Laue-transmission configuration is used in different energy ranges to satisfy the requirements for beam size and energy *** focused beam size is approximately 3.5μm(H)×21.5μm(V),and the X-ray energy range is 5–25 *** one-and two-dimensional position-sensitive detectors with frame rates of up to 400 kHz enables time resolutions of tens of microseconds to be *** distinctive techniques,such as the concurrent measurement of in situ Ed-XAS and infrared spectroscopy,time-resolved Ed-XAS,high-pressure Ed-XAS,XMCd,and pump-probe Ed-XAS,can be applied to achieve different scientific goals.

关键词： Ed-XAS SR-IR Time-resolved d-line SSRF

弯曲载荷下双金属机械复合管内衬层屈曲失效机理

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船舶力学 2024年第2期28卷 283-293页

作者：张杰胡特西南石油大学机电工程学院成都610500 石油天然气装备技术四川省科技资源共享服务平台成都610500 石油天然气装备教育部重点实验室成都610500

双金属机械复合管是油气田集输管线防腐控制的主要措施之一,而内衬层的失效是制约复合管工程应用的关键难题。为研究双金属机械复合管内衬层屈曲失效机理,建立弯曲载荷下复合管力学模型,研究成型压力、工作内压及复合管结构参数对内衬... 详细信息

双金属机械复合管是油气田集输管线防腐控制的主要措施之一,而内衬层的失效是制约复合管工程应用的关键难题。为研究双金属机械复合管内衬层屈曲失效机理,建立弯曲载荷下复合管力学模型,研究成型压力、工作内压及复合管结构参数对内衬层失效模式的影响规律。结果表明:增加成型后的残余接触压力有助于提高内衬层的抗屈曲能力;较高的工作内压能够延缓内衬层屈曲时间,减小其褶皱幅值;成型前复合管层间初始间隙减小有利于提高内衬层抗屈曲能力;随着外基管壁厚、内衬管壁厚、复合管内径的增加,内衬管的抗屈曲能力增强。

关键词：双金属复合管液压成型弯曲载荷屈曲失效

The role ofγ-C_(2)H_(5)NO_(2) as a new transient liquid phase in cold sintering process of BaTiO_(3) composites

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Journal of Advanced Ceramics 2024年第7期13卷 942-955页

作者： Jitrawan Noisak Pimchanok Ieamviteevanich Thitirat Charoonsuk Phakkhananan Pakawanit Nattapong Pinpru Wanwilai Vittayakorn Tosapol Maluangnont Panpailin Seeharaj Theerachai Bongkarn te-Wei Chiu Naratip Vittayakorn Advanced Materials Research Unit School of ScienceKing Mongkut’s Institute of Technology LadkrabangBangkok 10520Thailand department of Chemistry School of ScienceKing Mongkut’s Institute of Technology LadkrabangBangkok 10520Thailand department of Materials Science Faculty of ScienceSrinakharinwirot UniversityBangkok 10110Thailand Synchrotron Research and Applications division Synchrotron Light Research InstituteNakhon Ratchasima 30000Thailand Sustainability Centre Plastics Market Intelligent DepartmentPlastics Institute of ThailandBangkok 10110Thailand Electroceramics Research Laboratory College of Materials Innovation and TechnologyKing Mongkut's Institute of Technology LadkrabangBangkok 10520Thailand department of Physics Faculty of ScienceNaresuan UniversityPhitsanulok 65000Thailand Research Center for Academic Excellence in Applied Physics Faculty of ScienceNaresuan UniversityPhitsanulok 65000Thailand department of Materials and Mineral Resources Engineering "National"Taipei University of TechnologyTaipei 106TaiwanChina

dielectric materials,such as barium titanate(BT)-based materials,have excellent dielectric properties but require high temperatures(above 1300℃)for ceramic fabrication,leading to high costs and energy *** cold sintering process(CSP)offers a solution to these issues and is gaining worldwide attention as an innovative fabrication *** this work,we proposed an alternative organic ferroelectric phase,gamma-glycine(γ-GC),which acts as a transient liquid phase to fabricate high-density composites with barium titanate(BT)at low temperatures through *** findings show that the density of 15γ-GC/85BT reached 96.7%±1.6%when it was sintered at 120℃for 6 h under 10 MPa uniaxial *** electron microscopy‒energy dispersive X-ray spectroscopy(SEM‒EdS)mappings of the composite suggested thatγ-GC completely underwent the precipitation-dissolution process and,therefore,filled between BT ***,X-ray diffraction(XRd)and Fourier-transform infrared spectroscopy(FTIR)confirmed the preservation ofγ-GC without undesired phase *** addition,the ferroelectric and dielectric properties ofγ-GC/BT composites have been *** high dielectric constant(ε_(r))was 3600,and the low dielectric loss(tanδ)was 1.20 at 200℃and 100 kHz for the 15γ-GC/85BT *** hysteresis loop showed a remanent polarization(P_(r))of 0.55µC·cm^(−2)and a coercive field(E_(c))of 7.25 kV·cm^(−1).Our findings reaffirmed that an organic ferroelectric material(γ-GC)can act as a transient liquid phase in a CSP that can successfully and sustainably fabricateγ-GC/BT composites at low temperatures while delivering outstandingly high performance.

关键词： gamma-glycine(γ-GC) barium titanate(BT) cold sintering process organic ferroelectric materials dielectric properties ferroelectric properties

On a Heuristic Point of View about the Generalization of Curie Law to Cosmic Higgs Fields with the Casimir Effect

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Journal of Applied Mathematics and Physics 2024年第9期12卷 3135-3147页

作者： Hung-te Henry Su Po-Han Lee department of Physics National Chung Cheng University Chia-Yi department of Electro-Optical Engineering National Taipei University of Technology Taipei City The Affiliated Senior High School of National Taiwan Normal University Taipei City

Condensed state physics demonstrates that the Curie temperature is the point at which spontaneous magnetization drops to zero, marking the critical transition where ferromagnetic or ferrimagnetic materials transform into paramagnetic substances. Below the Curie temperature, a material remains ferromagnetic;above it, the material becomes paramagnetic, with its magnetic field easily influenced by external magnetic fileds. For example, the Curie temperature of iron (Fe) is 1043 K, while that of neodymium magnets ranges from 583 to 673 K. From both physics and mathematics perspectives, examining the temperature properties of materials is essential, as it provides valuable insights into their electromagnetic and thermodynamic behaviors. This paper makes a bold assumption and, for the first time, carefully verifies the existence of a Casimir temperature at 0.00206 K under conditions of one-atomic spacing.

关键词： Curie temperature Curie Point Casimir temperature Critical Point Fields Materials One-Atomic Spacing

Unexpected diversity in Ecosystem Nutrient Responses to Experimental drought in temperate Grasslands

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Phyton-International Journal of Experimental Botany 2024年第4期93卷 831-841页

作者： Biying Qiu Niwu te Lin Song Yuan Shi Chuan Qiu Xiaoan Zuo Qiang Yu Jianqiang Qian Zhengwen Wang Honghui Wu Wentao Luo School of Life Sciences Hebei UniversityBaoding071002China Liaoning Northwest Grassland Ecosystem National Observation and Research Station Erguna Forest-Steppe Ecotone Research StationInstitute of Applied EcologyChinese Academy of SciencesShenyang110164China Northwest Institute of Eco-Environment and Resources Chinese Academy of SciencesLanzhou730030China School of Grassland Science Beijing Forestry UniversityBeijing100083China College of Forestry Henan Agricultural UniversityZhengzhou450002China State Key Laboratory of Efficient Utilization of Arid and Semi-Arid Arable Land in Northern China Institute of Agricultural Resources and Regional PlanningChinese Academy of Agricultural SciencesBeijing100081China Key Laboratory of Arable Land Quality Monitoring and Evaluation Ministry of Agriculture and Rural AffairsInstitute of Agricultural Resources and Regional PlanningChinese Academy of Agricultural SciencesBeijing100081China

The responses of ecosystem nitrogen (N) and phosphorus (P) to drought are an important component of globalchange studies. However, previous studies were more often based on site-specific experiments, introducing a significantuncertainty to synthesis and site comparisons. We investigated the responses of vegetation and soil nutrientsto drought using a network experiment of temperate grasslands in Northern China. drought treatment (66%reduction in growing season precipitation) was imposed by erecting rainout shelters, respectively, at the driest,intermediate, and wettest sites. We found that vegetation nutrient concentrations increased but soil nutrient concentrationsdecreased along the aridity gradient. differential responses were observed under experimentaldrought among the three grassland sites. Specifically, the experimental drought did not change vegetation andsoil nutrient status at the driest site, while strongly reduced vegetation but increased soil nutrient concentrationsat the site with intermediate precipitation. On the contrary, experimental drought increased vegetation N concentrationsbut did not change vegetation P and soil nutrient concentrations at the wettest site. In general, the differentialeffects of drought on ecosystem nutrients were observed between manipulative and observationalexperiments as well as between sites. Our research findings suggest that conducting large-scale, consistent, andcontrolled network experiments is essential to accurately evaluate the effects of global climate change on terrestrialecosystem bio-geochemistry.

关键词： Climate change drought experiment precipitation nutrient cycles

《文心雕龙》“神思”“风骨”之意涵与《神思》至《总术》之结构

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复旦学报（社会科学版） 2024年第1期66卷 80-90页

作者：陈特复旦大学中国古代文学研究中心上海200433

《神思》在《文心雕龙》之“下篇”中占据核心地位。刘勰所谓之“思”,实包含内外两面。“思”之内关乎“意”,“思”之外形诸“言”,二者之间存在着逻辑上的先后,却并无决定性关系。《神思》全篇均围绕着“思”之内外两面展开,而《文... 详细信息

《神思》在《文心雕龙》之“下篇”中占据核心地位。刘勰所谓之“思”,实包含内外两面。“思”之内关乎“意”,“思”之外形诸“言”,二者之间存在着逻辑上的先后,却并无决定性关系。《神思》全篇均围绕着“思”之内外两面展开,而《文心雕龙》的“割情析采”部分(《神思》至《总术》,共十九篇),亦环绕着“思”之内外结撰而成,且分为两个层次:《神思》《体性》《风骨》三篇为枢轴,《通变》至《总术》十六篇则围绕着枢轴从宏观、微观等不同层次展开作文指导。通过对《文心雕龙》“神思”的准确分判,不仅能够更好地理解“神思”这一概念的所指与文学批评史价值;还能使“风骨”之意涵得到准确疏通:“风”与“骨”即“思”之内外两面得到妥善发挥后的效果;更能明晰“割情析采”十九篇之两层结构。

关键词：神思内外意言风骨割情析采

Local Application of Combined drugs of Natural Essential Oils for the Prevention of Acute Pharyngitis

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International Journal of Otolaryngology and Head & Neck Surgery 2024年第5期13卷 311-320页

作者： diāna Katoviča Marks Ronis Beāte Rundāne Pauls Stradins Clinical University Hospital Riga Latvia Childrens Clinical University Hospital Riga Latvia Faculty of Medicine Rga Stradi University Riga Latvia

Objective: Viral pharyngitis, commonly known as a sore throat, is a widespread condition affecting people of all ages globally. This study aimed to assess the effectiveness of a medical device containing the combined drugs of natural essential oils (CdNEO) formulation in managing throat pain in patients with acute viral pharyngitis. With the growing resistance to traditional antibacterial treatments, essential oils have attracted interest for their potential analgesic, anti-inflammatory, and antibacterial properties. Results: The study involved 81 patients randomly divided into two groups: those taking a medical device containing combined drugs of natural essential oils (CdNEO) and those taking a placebo. A questionnaire was used to assess throat pain among the participants, with 45 receiving the CdNEO and 36 the placebo. The CdNEO group experienced a significant reduction in throat pain, with the average VAS score decreasing from 5.36 to 1.09, compared to the placebo group, which saw a decrease from 4.97 to 2.19. This difference, with p Conclusion: By using a double-blind research method, it was possible to evaluate the effectiveness of the oils more objectively, since there was also a control placebo group. The study shows that CdNEO significantly reduces throat pain and decreases the need for additional pain relief medication in patients with acute viral pharyngitis. The findings suggest that natural essential oils could serve as an alternative treatment for pharyngitis, particularly in efforts to minimize NSAId use and combat antibiotic resistance.

关键词： Sore Throat Essential Oils NSAId Acute Viral Pharyngitis Natural Treatment

A PdGFRβ-targeting nanodrill system for pancreatic fibrosis therapy

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Chinese Chemical Letters 2024年第10期35卷 353-359页

作者： Han Han Bi-te Chen Jia-Rong ding Jin-Ming Si Tian-Jiao Zhou Yi Wang Lei Xing Hu-Lin Jiang State Key Laboratory of Natural Medicines Department of PharmaceuticsChina Pharmaceutical UniversityNanjing 210009China College of Pharmacy .Yanbian UniversityYanji 133002China department of Nephrology Changhai HospitalNaval Medical UniversityShanghai 200433China

Activated pancreatic stellate cells(PSCs)are the main source of collagen layer deposition and the key target in pancreatic ***,no effective treatment specific to pancreatic fibrosis clinically,owing to the drug accumulation blocked by the collagen barrier and thus it is difficult to inhibit activated PSCs ***,a PSCs-targeting nano-system based on“nanodrill”strategy(LA-PC)was designed to enhance the accumulation of all-trans retinoic acid(ATRA)in PSCs,relying on the platelet-derived growth factor receptor beta(PdGFRβ)-targeting peptide(p PB:C*SRNLIdC*)and collagenase(Col).After being injected into fibrotic mice via tail vein,the Col modified on LA-PC can remove the excess collagen layer,and the drug delivery efficiency through pPB targeting peptide was more than 5 times higher than that of free ATRA,as well as the degree of fibrosis significantly ***,this nano-system effectively inhibited platelet-derived growth factor subunit B(PdGF-BB)/PdGFRβaxis on PSCs via a down-regulated extracellular signal-regulated protein kinase(ERK)pathway,and accordingly reduced the level of ***,the smart platform provided a promising strategy for the treatment of pancreatic fibrosis to achieve the precise regulation of PSCs.

关键词： Pancreatic fibrosis Pancreatic stellate cells Liposome PdGFRβ pPB peptide

Pathologically relevant aldoses and environmental aldehydes cause cilium disassembly via formyl group-mediated mechanisms

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Journal of Molecular Cell Biology 2024年第1期16卷 15-28页

作者： te Li Min Liu Fan Yu Song Yang Weiwen Bu Kai Liu Jia Yang Hua Ni Mulin Yang Hanxiao Yin Renjie Hong dengwen Li Huĳie Zhao Jun Zhou Haihe Laboratory of Cell Ecosystem State Key Laboratory of Medicinal Chemical BiologyTianjin Key Laboratory of Protein ScienceCollege of Life SciencesNankai UniversityTianjin 300071China Laboratory of Tissue Homeostasis Haihe Laboratory of Cell EcosystemTianjin 300462China Center for Cell Structure and Function Collaborative Innovation Center of Cell Biology in Universities of ShandongShandong Provincial Key Laboratory of Animal Resistance BiologyCollege of Life SciencesShandong Normal UniversityJinan 250014China

Carbohydrate metabolism disorders(CMds),such as diabetes,galactosemia,and mannosidosis,cause ciliopathy-like multiorgan ***,the mechanistic link of cilia to CMd complications is still poorly ***,we describe significant cilium disassembly upon treatment of cells with pathologically relevant aldoses rather than the corresponding sugar ***,environmental aldehydes are able to trigger cilium disassembly by the steric hindrance effect of their formyl *** studies reveal that aldehydes stimulate extracellular calcium influx across the plasma membrane,which subsequently activates the calmodulin-Aurora A-histone deacetylase 6 pathway to deacetylate axonemal microtubules and triggers cilium *** vivo experiments further show that Hdac6 knockout mice are resistant to aldehyde-induced disassembly of tracheal cilia and sperm *** findings reveal a previously unrecognized role for formyl group-mediated cilium disassembly in the complications of CMds.

关键词： carbohydrate metabolism disorder aldose aldehyde cilium disassembly formyl group calcium influx HdAC6