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Interplay between geometric and electronic structures of Pt entities over TiO_(2) for CO oxidation

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Science China Chemistry 2024年第2期67卷 705-714页

作者： Xixiong Zhang wen shi Shaobo Han Yong Li wenjie Shen School of Chemistry Dalian University of TechnologyDalian116024China State Key Laboratory of Catalysis Dalian Institution of Chemical PhysicsChinese Academy of SciencesDalian116023China

Monodispersed Pt colloids with a mean size of 2 nm were deposited uniformly on the {110} facets of a rod-shaped rutile TiO_(2),forming a well-defined Pt/TiO_(2) *** treatment of this precursor at elevated temperatures re-dispersed the Pt particles into clusters and ***-calcination at 673 K partially oxidized the Pt particle surface,while calcination at 773 K yielded Pt Oxclusters of 1.6 nm in 7–8 atomic *** calcination at 873 K formed a mixture of raft-like PtO_(x) clusters(1.6 nm,1–2 atomic layers) and cationic *** tested for CO oxidation at 373 K,the Pt particles showed a higher activity than the Pt Oxclusters,whereas the cationic single-atoms were much less *** H_(2)-reduction at 473 K converted the partially oxidized Pt particles into the metallic species,but they were encapsulated by TiO_(2)–xoverlayers because of the strong metal–support interactions,which decreased the activity dramatically.H_(2)-reduction of the PtO_(x) clusters at473 K enhanced the fraction of metallic Pt species without changing the size and geometry,and promoted the activity substantially.H_(2)-treatment of Pt single-atoms at 473 K increased the activity only moderately because most Pt species still kept at cationic *** results straightforwardly differentiated the catalytic behavior of Pt particles,clusters and single-atoms at the same metal loading and over the same TiO_(2) support,and further demonstrated that the electronic structures of Pt entities played a decisive role in the catalytic oxidation,in addition to the specified sizes.

关键词： Pt/TiO_(2)catalyst size effect Pt clusters active sites electronic structures CO oxidation

A highly sensitive multiple-mode optical thermometer designed in Eu^(2+/3+)and Li^(+)co-doped polymorphism compound LaSc_(3)(BO_(3))_(4)

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Journal of Advanced Ceramics 2024年第6期13卷 821-833页

作者： Nan Yang Zhuo Li Tingxia Zhou Ziwang Zhang wen shi Yexiang Tong Jianxin shi School of Chemistry IGCMESun Yat-sen UniversityGuangzhou 510006China MOE of the Key Laboratory of Bioinorganic and Synthetic Chemistry IGCMEThe Key Lab of Low-Carbon Chemistry&Energy Conservation of Guangdong ProvinceSun Yat-sen UniversityGuangzhou 510006China

Noncontact optical thermometers have attracted widespread attention,but existing problems such as single-mode and low-sensitivity thermometers still urgently need to be ***,a novel multiple-mode thermometer was designed for the polymorphism LaSc_(3)(BO_(3))_(4):Eu^(2+/3+),Li^(+).X-ray diffraction(XRD)patterns revealed a slight transition betweenα-andβ-phases with the concentrations of the dopants,which is further proved by structure refinements and first-principles *** coexistence of Eu^(2+)and Eu^(3+)in the phosphors and their relative percentages were confirmed by X-ray absorption near-edge structure(XANES)*** from appropriate emissions from Eu^(2+)and Eu^(3+)without obvious energy transfer and their opposite changing trends with temperatures under 307 nm excitation,a triple-mode optical thermometer is obtained for this material within the temperature range of 150–450 *** highest sensitivities of 27.65,14.05,and 7.68%·K^(−1)are achieved based on two fluorescence intensity ratio(FIR)modes of Eu^(2+)and Eu^(3+)(5d–4f/^(5)D_(0)–^(7)F_(2,4))and the fluorescence lifetime(FL)mode of Eu^(2+),*** the best of our knowledge,the former is almost the highest in Eu^(2+)and Eu^(3+)co-doped *** results indicate that this material may be used as an excellent multiple-mode optical thermometer.

关键词： phase transition europium(Eu)ions multiple-mode optical thermometer thermal quenching properties fluorescence intensity ratio(FIR) fluorescence lifetime(FL)

Comparative analysis of the short and medium-term efficacy of the Da Vinci robot versus laparoscopic total mesangectomy for rectal cancer

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World Journal of Gastrointestinal Surgery 2024年第6期16卷 1681-1690页

作者： Wei-Ge Gao wen shi Xu-Chen Gong Zhi-wen Li Yiminjiang Tuoheti Department of Anorectal Surgery People’s Hospital of Xinjiang Uygur Autonomous RegionUrumqi 830001Xinjiang Uygur Autonomous RegionChina Department of Anus and Intestine Surgery Cancer Hospital of Chinese Academy of Medical SciencesBeijing 100084China

BACKGROUND The Da Vinci robot-assisted surgery technique has been widely used in laparo-scopic mesangectomy for rectal ***,the short-term efficacy of these procedures compared to traditional laparoscopic surgery remains *** purpose of this study was to compare and analyze the short-and medium-term efficacy of Da Vinci robot and laparoscopic surgery in total mesangectomy(TME)for rectal cancer,so as to provide guidance and reference for clinical *** To investigate the safety and long-term efficacy of robotic and laparoscopic total mesorectal resection for the treatment of rectal *** The clinicopathologic data of 240 patients who underwent TME for rectal cancer in the Anorectal Department of People’s Hospital of Xinjiang Uygur Autonomous Region from August 2018 to March 2023 were retrospectively *** them,112 patients underwent laparoscopic TME(L-TME)group,and 128 patients underwent robotic TME(R-TME)*** intraoperative,postoperative,and follow-up conditions of the two groups were *** The conversion rate of the L-TME group was greater than that of the R-TME group(5.4%vs 0.8%,χ^(2)=4.417,P=0.036).The complication rate of the L-TME group was greater than that of the R-TME group(32.1%vs 17.2%,χ^(2)=7.290,P=0.007).The percentage of positive annular margins in the L-TME group was greater than that in the R-TME group(7.1%vs 1.6%,χ^(2)=4.658,P=0.031).The 3-year disease-free survival(DFS)rate and overall survival(OS)rate of the L-TME group were lower than those of the R-TME group(74.1%vs 85.2%,χ^(2)=4.962,P=0.026;81.3%vs 91.4%,χ^(2)=5.494,P=0.019);in patients with American Joint Committee on Cancer stage Ⅲ DFS rate and OS rate in the L-TME group were significantly lower than those in the R-TME group(52.5%vs 76.1%,χ^(2)=5.799,P=0.016;65.0%vs 84.8%,χ^(2)=4.787,P=0.029).CONCLUSION Compared with the L-TME group,the R-TME group had a better tumor prognosis and was more favorable for patients with rectal cancer

关键词： Rectal tumor Robots Laparoscopy Total mesangectomy Survival prognosis Retrospective analysis

Study on the Relationship between AMPK/UCP2 Pathway and Mitochondrial Dysfunction in Granulosa Cells of Polycystic Ovay Syndrome

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Chinese Journal of Biomedical Engineering(English Edition) 2024年第1期33卷 1-8页

作者： ZHANG Ju-shun HE Bin-bin wen shi-di Longyan First Affiliated Hospital of Fujian Medical University Longyan Fujian 364000China

Objective:To investigate the changes of the AMP-activated protein kinase(AMPK)/uncoupling protein 2(UCP2)(AMPK/UCP2)pathway in ovarian granulosa cells with PCOS and its relationship with mitochondrial ***:PCOS mouse models and normally fed mice,ovarian granulosa cells from the two mice were extracted,and the protein expression levels of AMPKα,p-AMPKαand UCP2 were detected by western *** ROS and ATP content of granulosa cells were determined by colorimetric and chemiluminescence immunoassays to assess mitochondrial *** correlation analysis was used to determine the correlation between AMPK/UCP2 pathway-related proteins,ROS and ***:P-AMPKα/GAPDH(0.12±0.09),AMPKα/GAPDH(0.35±0.40),P-AMPKα/AMPKα(0.56±0.33)and ATP(0.36±0.04)pmol/mg in PCOS model mice were lower than those in non-POCS groups,while UCP2/GAPDH(1.18±0.28)and ROS(48810.92±4498.08)were lower than those in non-POCS *** fluorescence intensity of DCF was higher than that of the non-POCS group(P<0.05).AMPK was positively correlated with ATP and negatively correlated with ***2 was positively correlated with ROS and negatively correlated with ***:There are abnormal changes such as decreased AMPK expression and increased UCP2 expression in ovarian granulosa cells of PCOS,and AMPK is positively and negatively correlated with mitochondrial function indexes ATP and ROS,while UCP2 is the opposite,suggesting that the imbalance in the expression and activity of AMPK/UCP2 pathway in PCOS may be one of the molecular mechanisms leading to mitochondrial *** of AMPK/UCP2 pathway activity may be a potential therapeutic target to ameliorate PCOS-related mitochondrial dysfunction.

关键词： polycystic ovary syndrome AMP-activated protein kinase(AMPK) uncoupling protein 2(UCP2) mitochondrial dysfunction granule cells

Adhesive Contact of Elastic Solids with Self-Affine Fractal Rough Surfaces

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Acta Mechanica Solida Sinica 2024年第2期37卷 265-270页

作者： Xuan-Ming Liang shi-wen Chen Si-He Wang Zhen-Yuan Gong Jun Feng Gang-Feng Wang Department of Engineering Mechanics SVL and MMMLXi’an Jiaotong UniversityXi’an710049China OPPO Mobile Telecommunications Corporation Ltd. Dongguan523860China

The elastic adhesive contact of self-affine fractal rough surfaces against a rigid flat is simulated using the finite element method. An array of nonlinear springs, of which the force-separation law obeys the Lennard–Jones potential, is introduced to account for the interfacial adhesion. For fractal rough surfaces, the interfacial interaction is generally attractive for large mean gaps, but turns repulsive as the gap continuously shrinks. The interfacial interactions at the turning point corresponding to the spontaneous contact are shown for various surfaces. For relatively smooth surfaces, the probability density distributions of repulsion and attraction are nearly symmetric. However, for rougher surfaces, the simulation results suggest a uniform distribution for attraction but a monotonously decreasing distribution with a long tail for repulsion. The pull-off force rises with increasing ratio of the work of adhesion to the equilibrium distance, whereas decreases for solids with a higher elastic modulus and a larger surface roughness. The current study will be helpful for understanding the adhesion of various types of rough solids.

关键词： Fractal rough surfaces Adhesion Contact mechanics Lennard-Jones potential

Influence of Energy Policies on Development Path of US Oil Companies

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China Oil & Gas 2024年第2期31卷 33-37页

作者： shi wen CNPC International Department

Focused on“energy security”,US energy policies have undergone a multi-stage *** main line has shifted from ensuring the oil and gas supply to achieving energy independence,and then to diversified development under a broader concept of energy *** development path of US oil and gas companies is guided and influenced by series of *** by ExxonMobil and Chevron,US oil companies are maintaining a long commitment to the oil and gas business,especially unconventional resources such as shale gas and shale *** from their European counterparts,US oil companies have chosen CCS/CCUS as their primary method for achieving carbon *** for the new energy business,the US oil giants are showing more interest in raw materials such as lithium resources rather than the power generation business.

关键词： companies shale independence

A Descriptive Translation Study of Chinese Translation of French Musical Roméo et Juliette

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Journal of Literature and Art Studies 2024年第6期14卷 462-467页

作者： shi Xiao-wen School of Translation Studies Shandong UniversityWeihaiChina

This paper presents a Descriptive Translation Study(DTS)analysis of the Chinese translation of the French musical adaptation of Romeo and Juliet,titled Roméo et Juliette:de la Haineàl’*** and Juliet,a timeless play by Shakespeare,has captivated audiences since its premiere in 1597 and has been adapted into various forms,including stage productions,films,musicals,and *** focus of this study is to analyze the Chinese translation of the French musical adaptation from a DTS *** is an approach that aims to understand the translation process and its reception in the target *** examining language choices,cultural references,and adaptation strategies,this study seeks to shed light on how the Chinese translation of the French musical functions within the target culture and influences the reception and interpretation of the source *** analysis is expected to gain insights into the challenges and strategies employed in translating a musical adaptation of Romeo and Juliet into *** findings of this study will contribute to the field of translation studies and provide a deeper understanding of the complexities involved in the translation of musical works.

关键词： Descriptive Translation Study(DTS) Chinese translation musical adaption of classics Romeo and Juliet reception and interpretation

基于改进整群抽样的基效应仿真因子筛选及应用

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控制与决策 2024年第8期39卷 2728-2736页

作者：施文陈奥中南大学商学院长沙410083

大数据背景下,仿真模型通常有许多因子,仿真筛选实验(screening)就是识别出其中对响应(仿真输出或系统绩效)起最重要作用的少部分因子(亦称仿真输入或变量)的重要方法.目前常用的筛选方法有序贯分支法(SB)与基效应法(EE).相较于SB方法,E... 详细信息

大数据背景下,仿真模型通常有许多因子,仿真筛选实验(screening)就是识别出其中对响应(仿真输出或系统绩效)起最重要作用的少部分因子(亦称仿真输入或变量)的重要方法.目前常用的筛选方法有序贯分支法(SB)与基效应法(EE).相较于SB方法,EE以其不假设具体的仿真输入/输出数学关系(model-free)的优势在近年来不断发展并被应用于诸多领域,然而其劣势在于计算效率.为提高EE仿真模型的计算效率,提出一种改进的更具一般性的整群抽样方法(简称ECS).相较于现有整群抽样方法,ECS通过拆分矩阵的方式自动构造抽样矩阵,利用该矩阵能够为每个因子生成数量相同且满足目标的基效应,节省大量的仿真预算.蒙特卡罗仿真实验表明,ECS在不损失统计效力的基础上可大大提高计算效率,充分验证该方法的有效性.

关键词： Morris方法基效应整群抽样仿真实验因子筛选

Pseudorabies virus manipulates mitochondrial tryptophanyl-tRNA synthetase 2 for viral replication

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Virologica Sinica 2024年第3期39卷 403-413页

作者： Xiu-Qing Li Meng-Pan Cai Ming-Yang Wang Bo-wen shi Guo-Yu Yang Jiang Wang Bei-Bei Chu Sheng-Li Ming College of Veterinary Medicine Henan Agricultural UniversityZhengzhou 450046China Key Laboratory of Animal Biochemistry and Nutrition Ministry of Agriculture and Rural AffairsZhengzhou 450046China Key Laboratory of Veterinary Biotechnology of Henan Province Henan Agricultural UniversityZhengzhou 450046China Longhu Advanced Immunization Laboratory Zhengzhou 450046China International Joint Research Center of National Animal Immunology Henan Agricultural UniversityZhengzhou 450046China Ministry of Education Key Laboratory for Animal Pathogens and Biosafety Zhengzhou 450046China School of Basic Medicine Chongqing Medical UniversityChongqing 400016China

The pseudorabies virus(PRV)is identified as a double-helical DNA virus responsible for causing Aujeszky's disease,which results in considerable economic impacts *** enzyme tryptophanyl-tRNA synthetase 2(WARS2),a mitochondrial protein involved in protein synthesis,is recognized for its broad expression and vital role in the translation *** findings of our study showed an increase in both mRNA and protein levels of WARS2 following PRV infection in both cell cultures and animal *** WARS2 expression via RNA interference in PK-15 cells led to a reduction in PRV infection rates,whereas enhancing WARS2 expression resulted in increased infection ***,the activation of WARS2 in response to PRV was found to be reliant on the cGAS/STING/TBK1/IRF3 signaling pathway and the interferon-alpha receptor-1,highlighting its regulation via the type I interferon signaling *** analysis revealed that reducing WARS2 levels hindered PRV's ability to promote protein and lipid *** research provides novel evidence that WARS2 facilitates PRV infection through its management of protein and lipid levels,presenting new avenues for developing preventative and therapeutic measures against PRV infections.

关键词： Pseudorabies virus WARS2 Innate immunity Protein synthesis Lipid synthesis