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Spatial construction of ultrasmall Pt-decorated 3D spinel oxidemodified N-doped graphene nanoarchitectures as high-efficiency methanol oxidation electrocatalysts

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Rare Metals 2024年第1期43卷 186-197页

作者： Qi Zhang Min-Min Yan wen-Fa Du Chen-Yu Yin Jian Zhang Lu Yang Yun-Qing Kang Hai-Yan He Hua-jie Huang College of Mechanics and Materials Hohai UniversityNanjing 210098China New Energy Technology Engineering Lab of Jiangsu Province College of ScienceNanjing University of Posts&Telecommunications(NUPT)Nanjing 210023China International Center for Materials Nanoarchitectonics(WPIMANA) National Institute for Materials ScienceTsukuba 305-0044IbarakiJapan

Direct methanol fuel cell technology recently becomes the focus of both academic and engineering circles,which stimulates the exploitation and utilization of advanced electrode catalysts with high activity and long ***,we demonstrate a robust bottom-up approach to the spatial construction of three-dimensional(3D) spinel manganese-cobalt oxide-modified N-doped graphene nanoarchitectures decorated with ultrasmall Pt nanoparticles(Pt/MnCo_(2)O_(4)-NG) via a controllable selfassembly *** incorporation of MnCo_(2)O_(4)nanocrystals provides abundant hydroxyl sources to promote the oxidative removal of CO-like byproducts on Pt sites,while the existence of 3D porous N-doped graphene networks facilitates the transportation of both ions and electrons in the hybrid system,thus giving rise to remarkable synergetic coupling effects during the methanol oxidation ***,the optimized Pt/MnCo_(2)O_(4)-NG nano architecture expres ses exceptional electrocatalytic properties with a large electrochemically active surface area of 99.5 m^(2)·g^(-1),a high mass activity of1508.3 mA·mg^(-1),strong toxicity resistance and reliable long-term durability,which have obvious competitive advantages over those of conventional Pt/carbon black,Pt/carbon nano tube,Pt/graphene,and Pt/N-doped graphene catalysts with the same Pt usage.

关键词： Platinum MnCo_(2)O_(4) 3D graphene Electrocatalysts Methanol oxidation

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New insights into the deposition of natural gas hydrate on pipeline surfaces:A molecular dynamics simulation study

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Petroleum Science 2024年第1期21卷 694-704页

作者： Jun Zhang Hai-Qiang Fu Mu-Zhi Guo Zhao Wang Li-wen Li Qi Yin You-Guo Yan Wei Wei Wei-Feng Han jie Zhong School of Materials Science and Engineering China University of Petroleum(East China)Qingdao 266580ShandongChina School of Petroleum Engineering China University of Petroleum(East China)Qingdao 266580ShandongChina Department of Alternative Energy PetroChina Research Institute of Petroleum Exploration&DevelopmentLangfang 065007HebeiChina

Natural gas hydrate(NGH)can cause pipeline blockages during the transportation of oil and gas under high pressures and low *** hydrate adhesion on pipelines is viewed as an efficient way to prevent NGH *** studies suggested the water film can greatly increase hydrate adhesion in gas-dominant ***,by performing the molecular dynamics simulations,we find in water-dominant system,the water film plays different roles in hydrate deposition on Fe and its corrosion ***,due to the strong affinity of water on Fe surface,the deposited hydrate cannot convert the adsorbed water into hydrate,thus,a water film *** water affinities decrease(Fe>Fe_(2)O_(3)>FeO>Fe_(3)O_(4)),adsorbed water would convert to amorphous hydrate on Fe_(2)O_(3)and form the ordered hydrate on FeO and Fe_(3)O_(4)after hydrate *** absorbed water film converts to amorphous or to hydrate,the adhesion strength of hydrate continuously increases(Fe

关键词： Deposition Natural gas hydrate Pipelines Water affinity Adhesion strength

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Notably Accelerated Nano-Bainite Transformation via Increasing Undissolved Carbides Content on GCr15Si1Mo Bearing Steel

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Acta Metallurgica Sinica(English Letters) 2024年第4期37卷 703-712页

作者： Yan-Hui Wang Hua-Qiang Sun wen-Jing Feng Lei-jie Zhao Xiang Chen Qing-An Chen Hai-Tao Sun Jian-Jun Wang Zhi-Nan Yang Key Laboratory of Intelligent Industrial Equipment Technology of Hebei Province School of Mechanical and Equipment EngineeringHebei University of EngineeringHandan056038China Collaborative Innovation Center for Modern Equipment Manufacturing of Jinan New Area Hebei University of EngineeringHandan056038China School of Materials Science and Engineering Tsinghua UniversityBeijing100084China Avic Shang da Superalloys Company Limited Xingtai054800China National Engineering Research Center for Equipment and Technology of Cold Strip Rolling Yanshan UniversityQinhuangdao066004China

In this study, a high-carbon nano-bainitic GCr15Si1Mo bearing steel was investigated. Specifically, the effects of content and size of undissolved carbides on the microstructure and transformation kinetics of nano-bainite were analyzed. The results demonstrated that after prolonged austempering at low temperatures, the mixed microstructure composed of nano-bainite (NB), undissolved carbides (UC), and retained austenite (RA) was obtained in GCr15SiMo steel. When the experimental steel was austenitized at 900 ℃, the undissolved carbides gradually dissolved until reaching a stable state with increasing holding time. Furthermore, at the same austempering temperature, despite different volume fractions of undissolved carbides in the substrate, the volume fractions of nano-bainite in the final microstructures remained essentially the same. Moreover, the higher the content of undissolved carbides in steel, the faster the transformation rate of nano-bainite and the shorter the total transformation time.

关键词： Nano-bainite Undissolved carbides Bainitic transformation kinetics Carbon concentration

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High-throughput screening system of citrus bacterial cankerassociated transcription factors and its application to the regulation of citrus canker resistance

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Journal of Integrative Agriculture 2024年第1期23卷 155-165页

作者： Jia Fu jie Fan Chenxi Zhang Yongyao Fu Baohang Xian Qiyuan Yu Xin Huang wen Yang Shanchun Chen Yongrui He Qiang Li Integrative Science Center of Germplasm Creation in Western China(Chongqing)Science City Citrus Research InstituteSouthwest UniversityChongqing 400712China School of Advanced Agriculture and Bioengineering Yangtze Normal UniversityChongqing 408100China National Citrus Engineering Research Center Chongqing 400712China

One of the main diseases that adversely impacts the global citrus industry is citrus bacterial canker(CBC),caused by the bacteria Xanthomonas citri ***(Xcc).Response to CBC is a complex process,with both proteinDNA as well as protein–protein interactions for the regulatory *** detect such interactions in CBC resistant regulation,a citrus high-throughput screening system with 203 CBC-inducible transcription factors(TFs),were *** the upstream regulators of target by yeast-one hybrid(Y1H)methods was also performed.A regulatory module of CBC resistance was identified based on this *** TF(CsDOF5.8)was explored due to its interactions with the 1-kb promoter fragment of CsPrx25,a resistant gene of CBC involved in reactive oxygen species(ROS)homeostasis *** mobility shift assay(EMSA),dual-LUC assays,as well as transient overexpression of CsDOF5.8,further validated the interactions and transcriptional *** CsDOF5.8–CsPrx25 promoter interaction revealed a complex pathway that governs the regulation of CBC resistance via *** high-throughput Y1H/Y2H screening system could be an efficient tool for studying regulatory pathways or network of CBC resistance *** addition,it could highlight the potential of these candidate genes as targets for efforts to breed CBC-resistant citrus varieties.

关键词： citrus bacterial canker(CBC) high-throughput screening system transcription factor(TF) yeast-one hybrid(Y1H) CsPrx25

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Physical exercise reverses immuno-cold tumor microenvironment via inhibiting SQLE in non-small cell lung cancer

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Military Medical Research 2024年第4期11卷 616-619页

作者： Zhi-wen Luo Ya-Ying Sun Wei Xia Jun-Ying Xu Dong-Jing Xie Chun-Meng Jiao Ji-Ze Dong Hui Chen Ren-wen Wan Shi-Yi Chen jie Mei wen-Jun Mao Department of Sports Medicine Huashan Hospital Affiliated to Fudan UniversityShanghai 200040China Department of Sports Medicine Shanghai General HospitalShanghai 200080China Department of Critical Care Medicine the Affiliated Wuxi People’s Hospital of Nanjing Medical UniversityWuxi 214023JiangsuChina Department of Oncology the Affiliated Wuxi People’s Hospital of Nanjing Medical UniversityWuxi 214023JiangsuChina Guangdong Pharmaceutical University Guangzhou 510006China Institute of Acupuncture Research Institutes of Integrative MedicineFudan UniversityShanghai 200433China Department of Cardiothoracic Surgery the Affiliated Wuxi People’s Hospital of Nanjing Medical UniversityWuxi 214023JiangsuChina

Dear Editor,Physical exercise has been shown to be associated with reduced cancer incidence and cancer-associated mortality[1,2],but the underlying mechanisms are *** regulation has emerged as one of the most prominent mechanisms explaining the effects of exercise on cancer[1,2].Physical exercise primarily lowers blood cholesterol and triglycerides,and protects against cardiovascular diseases[3].However,whether physical exercise can modulate cholesterol metabolism in tumor cells is currently unknown.

关键词： Physical exercise Non-small cell lung cancer(NSCLC) Squalene epoxidase(SQLE) Tumor immune microenvironment(TIME)

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Establishment and validation of a predictive model for peripherally inserted central catheter-related thrombosis in patients with liver cancer

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World Journal of Gastrointestinal Surgery 2024年第7期16卷 2221-2231页

作者： Xiao-Fei Chen Hao-Jun Wu Tang Li Jia-Bin Liu wen-jie Zhou Qiang Guo Department of Thyroid Surgery West China Hospital of Sichuan UniversityChengdu 610041Sichuan ProvinceChina The Second Department of General Surgery Chengdu Shangjinnanfu HospitalWest China Hospital of Sichuan UniversityChengdu 611730Sichuan ProvinceChina Department of Biliary Surgery West China Hospital of Sichuan UniversityChengdu 610041Sichuan ProvinceChina Department of Hepatobiliary and Pancreatic Surgery Chengdu Shangjinnanfu HospitalWest China Hospital of Sichuan UniversityChengdu 611730Sichuan ProvinceChina Department of Vascular Surgery West China Hospital of Sichuan UniversityChengdu 610041Sichuan ProvinceChina

BACKGROUND Peripherally inserted central catheters(PICCs)are commonly used in hospitalized patients with liver cancer for the administration of chemotherapy,nutrition,and other ***,PICC-related thrombosis is a serious complication that can lead to morbidity and mortality in this patient *** risk factors have been identified for the development of PICC-related thrombosis,including cancer type,stage,comorbidities,and catheter *** these risk factors and developing a predictive model can help healthcare providers identify high-risk patients and implement preventive measures to reduce the incidence of *** To analyze the influencing factors of PICC-related thrombosis in hospitalized patients with liver cancer,construct a predictive model,and validate *** Clinical data of hospitalized patients with liver cancer admitted from January 2020 to December 2023 were ***-five cases of PICC-related thrombosis in hospitalized patients with liver cancer were collected,and 220 patients who underwent PICC placement during the same period but did not develop PICC-related thrombosis were randomly selected as controls.A total of 255 samples were collected and used as the training set,and 77 cases were collected as the validation set in a 7:3 *** patient information,case data,catheterization data,coagulation indicators,and Autar Thrombosis Risk Assessment Scale scores were *** and multivariate unconditional logistic regression analyses were performed on relevant factors,and the value of combined indicators in predicting PICC-related thrombosis in hospitalized patients with liver cancer was evaluated using receiver operating characteristic(ROC)curve *** Univariate analysis showed statistically significant differences(P<0.05)in age,sex,Karnofsky performance status score(KPS),bedridden time,activities of daily living impairment,parenteral nutrition,catheter duration,d

关键词： Liver cancer Peripherally inserted central catheters Thrombosis Model Verify

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Unexplained fetal tachycardia:A case report

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World Journal of Clinical Cases 2024年第9期12卷 1698-1703页

作者： Hui Wang Run-Zi Duan Xin-Jiu Bai Bing-Ting Zhang jie Wang wen-Xia Song Department of Nutrition Changzhi Maternal and Child Health Care Hospital Affiliated to Changzhi Medical CollegeChangzhi 046000Shanxi ProvinceChina Department of Obstetrics Changzhi Maternal and Child Health Care Hospital Affiliated to Changzhi Medical CollegeChangzhi 046000Shanxi ProvinceChina Department of Gynaecology Changzhi Maternal and Child Health Care Hospital Affiliated to Changzhi Medical CollegeChangzhi 046000Shanxi ProvinceChina Department of Medical Genetic Changzhi Maternal and Child Health Care Hospital Affiliated to Changzhi Medical CollegeChangzhi 046011Shanxi ProvinceChina

BACKGROUND This study aimed to explore the possible etiology and treatment of severe fetal tachycardia in the absence of organic disease and provide a reference for clinical management of severe fetal *** SUMMARY A 29-year-old pregnant woman,with a gravidity 1 parity 0,presented with a fetal heart rate(FHR)of 243 beats per minute during a routine antenatal examination at 31+2 wk of *** termination of pregnancy at 38 wk of gestation,the FHR repeatedly showed serious abnormalities,lasting more than 30 ***,the pregnant woman and the fetus had no clinical symptoms,and repeated examination revealed no organic *** mother and the baby were regularly followed *** This was a case of severe fetal tachycardia with no organic lesions and management based on clinical experience.

关键词： Fetal heart rate disorder Fetal tachycardia Severe tachycardia Case report

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Roles of combined femoral and acetabular anteversion in pathological changes of hip dysplasia and hip reconstructive surgery

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World Journal of Orthopedics 2024年第5期15卷 390-399页

作者： Can Liu Zheng Xu Jian-Fa Zeng Zhen-Qi Song Yu-Yin Xie Zhong-wen Tang jie wen Sheng Xiao Department of Anatomy Hunan Normal University School of MedicineChangsha 410003Hunan ProvinceChina Department of Pediatric Orthopedics Hunan Provincial People's HospitalThe First Affiliated Hospital of Hunan Normal UniversityChangsha 410013Hunan ProvinceChina

Combined femoral and acetabular anteversion is the sum of femoral and acetabular anteversion,representing their morphological relationship in the axial *** with the increasing understanding of hip dysplasia in recent years,numerous scholars have confirmed the role of combined femoral and acetabular anteversion in the pathological changes of hip *** present,the reconstructive surgery for hip dysplasia includes total hip replacement and redirectional hip preservation *** an important surgery index,combined femoral and acetabular anteversion have a crucial role in these ***,we discuss the role of combined femoral and acetabular anteversion in pathological changes of hip dysplasia,total hip replacement,and redirectional hip preservation surgery.

关键词： Combined anteversion Femoral anteversion Acetabular anteversion Hip dysplasia Hip preservation surgery Total hip replacement

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Effective time, correction speed and termination time of hemiepiphysiodesis in children

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World Journal of Orthopedics 2024年第1期15卷 1-10页

作者： Jian-Fa Zeng Yu-Yin Xie Can Liu Zhen-Qi Song Zheng Xu Zhong-wen Tang jie wen Sheng Xiao Department of Pediatric Orthopedics Hunan Provincial People's HospitalThe First Affiliated Hospital of Hunan Normal UniversityChangsha 410013Hunan ProvinceChina Department of Anatomy Hunan Normal University school of MedicineChangsha 410003Hunan ProvinceChina

In children with asymmetric growth on the medial and lateral side of limbs,if there still remains growth potential,the guided growth technique of hemiepiphysiodesis on one side of the epiphysis is recognized as a safe and effective ***,when the hemi-epiphysiodesis start to correct the deformities,how many degrees could hemi-epiphysiodesis bring every month and when to remove the hemi-epiphysiodesis implant without rebound phenomenon are still on *** article reviews the current studies focus on the effective time,correction speed and termination time of hemi-epiphysiodesis.

关键词： Hemi-epiphysiodesis Percutaneous epiphysiodesis Transphyseal screws Eight plate

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Properties and microstructure of copper–titanium alloys with magnesium additions

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Rare Metals 2024年第5期43卷 2290-2299页

作者： Lue Huang Li-Jun Peng Jiang Li Xu-Jun Mi Gang Zhao Guo-jie Huang Hao-Feng Xie Yi-Cheng Cao wen-Jing Zhang Zhen Yang State Key Laboratory of Nonferrous Metals and Processes GRINM Group Co.Ltd.Beijing 100088China GRIMAT Engineering Institute Co. LtdBejing 101407China School of Materials Science and Engineering Northeastern UniversityShenyang110000China General Research Institute for Nonferrous Metals Beijing 100088China China Academy of Space Technology Beijing 100094China China Nonferrous Metals Mining Group(Tianjin)Co.Ltd Tianjin 3001llChina

The volume fractions and morphology of precipitates in precipitation-strengthened Cu-Ti alloys,which precipitate mainly as continuous and discontinuous precipitates,are important for the application of the *** study employed hardness and electrical conductivity tests transmission electron microscopy(TEM),atom probe tomography(APT),and first-principles calculations to demonstrate that the addition of Mg is effective for accelerating nanosized continuousβ'-Cu_(4)Ti precipitation as well as for suppressing the precipitation of coarse lamellar discontinuousβ-Cu_(4)Ti precipitates along the grain boundaries,resulting in Cu-Ti alloys with high yield strength and good electrical *** results showed that the continuous precipitation ofβ'-Cu_(4)Ti was accelerated by the Mg additions,which reduced the supersaturation of the matrix,thereby reducing the chemical driving force for the discontinuous *** the other hand,Mg additions increased the mismatch between the discontinuousβ-Cu_(4)Ti precipitates and matrix decreased the nucleation rate of the discontinuous precipitates,and increased the spacing of the discontinuous precipitation layer,resulting in a lower growth rate of the discontinuous ***,the addition of Mg to Cu-Ti alloys enhances the strength and improves the resistance to over-ageing.

关键词： Cu-Ti-Mg alloy Precipitation hardening Discontinuous precipitation Continuous precipitation Microstructure formation mechanism

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