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Changes in microstructure and properties of weld heat-affected zone of high-strength low-alloy steel

Journal of iron and Steel Research international 2024年第8期31卷 2041-2052页

作者： Shu-jun Jia Qi-lin ma Yu Hou ba Li He-song Zhang Qing-you Liu Central iron and Steel Research institute Co. Ltd.Beijing 100081China Collaborative innovation Center for Steel Commonality University of Science and Technology BeijingBeijing 100083China Construction Project management Branch of China national Petroleum Pipeline Network Group Co. Ltd.Langfang 065000HebeiChina

The evolution of the microstructure and toughness of APL5L X80 pipeline steel after thermal welding simulation was investigated by X-ray diffraction,electron backscatter diffraction,and transmission electron *** results indicated that primary heat-affected zones can be divided into weld,coarse-grained,fine-grained,intercritical,and sub-critical *** microstructure of the weld zone is mainly composed of bainitic ferrite and a small amount of granular bainite;however,the original austenite grains are distributed in the columnar *** structure of the coarse-grained zone is similar to that of the weld zone,but the original austenite grains are *** contrast,the microstructure in the fine-grained zone is dominated by fine granular bainite,and the effective grain size is only 8.15μm,thus providing the highest toughness in the entire heat-affected *** intercritical and subcritical zones were brittle valley regions,and the microstructure was dominated by granular ***,the martensite-austenite(M/A)constituents are present in island chains along the grain boundaries,and the coarse size of the M/A constituents seriously reduces the *** results of the crack propagation analyzes revealed that high-angle grain boundaries can significantly slow down crack growth and change the crack direction,thereby increasing the material *** impact toughness of the low-temperature tempering zone was equivalent to that of the columnar grain zone,and the impact toughness was between those of the critical and fine-grained zones.

关键词： Welding thermal simulation impact toughness Crack propagation martensite-austenite constituent High-strength low-alloy steel weld Heat-affected zone

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Bio-based Waterborne Poly(Vanillin-Butyl Acrylate)/MXene Coatings for Leather with Desired Warmth Retention and Antibacterial Properties

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Engineering 2024年第5期36卷 250-263页

作者： Jianzhong ma Li ma Lei Zhang Wenbo Zhang Qianqian Fan Buxing Han College of Bioresources Chemical and materials Engineering Shaanxi University of Science and TechnologyXi’an 710021China Xi’an Key Laboratory of Green Chemicals and Functional materials Xi’an 710021China College of Chemistry and Chemical Engineering Shaanxi University of Science and TechnologyXi’an 710021China Shaanxi Collaborative innovation Center of industrial Auxiliary Chemistry and Technology Shaanxi University of Science and TechnologyXi’an 710021China institute of Chemistry Chinese Academy of SciencesBeijing 100190China

This study presents a solvent-free,facile synthesis of a bio-based green antibacterial agent and aromatic monomer methacrylated vanillin(MV)using *** resulting MV not only imparted antibacterial properties to coatings layered on leather,but could also be employed as a green alternative to petroleum-based carcinogen styrene(St).Herein,MV was copolymerized with butyl acrylate(ba)to obtain waterborne bio-based P(MV-ba)miniemulsion via miniemulsion ***,MXene nanosheets with excellent photothermal conversion performance and antibacterial properties,were introduced into the P(MV-ba)miniemulsion by ultrasonic *** the gradual solidification of P(MV-ba)/MXene nanocomposite miniemulsion on the leather surface,MXene gradually migrated to the surface of leather coatings due to the cavitation effect of ultrasonication and amphiphilicity of MXene,which prompted its full exposure to light and bacteria,exerting the maximum photothermal conversion efficiency and significant antibacterial *** particular,when the dosage of MXene nanosheets was 1.4 wt%,the surface temperature of P(MV-ba)/MXene nanocomposite miniemulsioncoated leather(PML)increased by about 15℃ in an outdoor environment during winter,and the antibacterial rate against Escherichia coli and Staphylococcus aureus was nearly 100%under the simulated sunlight treatment for 30 ***,the introduction of MXene nanosheets increased the air permeability,water vapor permeability,and thermal stability of these *** study provides a new insight into the preparation of novel,green,and waterborne bio-based nanocomposite coatings for leather,with desired warmth retention and antibacterial *** can not only realize zerocarbon heating based on sunlight in winter,reducing the use of fossil fuels and greenhouse gas emissions,but also improve ability to fight off invasion by harmful bacteria,viruses,and other microorganisms.

关键词： MXene nanosheets Vanillin Styrene substitute Leather coating Photothermal conversion Warmth retention Antibacterial properties

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Perioperative toripalimab plus neoadjuvant chemotherapy might improve outcomes in resectable esophageal cancer:an interim analysis of a phase Ⅲ randomized clinical trial

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Cancer Communications 2024年第10期44卷 1214-1227页

作者： Yan Zheng Guanghui Liang Dongfeng Yuan Xianben Liu Yufeng ba Zimin Qin Sining Shen Zhenxuan Li Haibo Sun baoxing Liu Quanli Gao Peng Li Zongfei Wang Shilei Liu Jianping Zhu Haoran Wang Haibo ma Zhenzhen Liu Fei Zhao Jun Zhang He Zhang Daoyuan Wu Jinrong Qu Jie ma Peng Zhang Wenjie ma Ming Yan Yongkui Yu Qing Li Jiangong Zhang Wenqun Xing Department of Thoracic Surgery The Affiliated Cancer Hospital of Zhengzhou UniversityHenan Cancer HospitalZhengzhouHenanP.R.China Department of immunotherapy The Affiliated Cancer Hospital of Zhengzhou UniversityHenan Cancer HospitalZhengzhouHenanP.R.China Department of Endoscopy The Affiliated Cancer Hospital of Zhengzhou UniversityHenan Cancer HospitalZhengzhouHenanP.R.China Department of Pathology The Affiliated Cancer Hospital of Zhengzhou UniversityHenan Cancer HospitalZhengzhouHenanP.R.China Department of Radiology The Affiliated Cancer Hospital of Zhengzhou UniversityHenan Cancer HospitalZhengzhouHenanP.R.China Department of Biobank The Affiliated Cancer Hospital of Zhengzhou UniversityHenan Cancer HospitalZhengzhouHenanP.R.China Department of Strategic Development The Affiliated Cancer Hospital of Zhengzhou UniversityHenan Cancer HospitalZhengzhouHenanP.R.China Department of Statistics LinkDoc Technology Co.LtdBeijingP.R.China Department of Cancer Epidemiology The Affiliated Cancer Hospital of Zhengzhou UniversityHenan Cancer HospitalZhengzhouP.R.China

background:in the era of immunotherapy,neoadjuvant immunochemotherapy(naiC)for the treatment of locally advanced esophageal squamous cell carcinoma(ESCC)is used clinically but lacks of high-level clinical *** study aimed to compare the safety and long-term efficacy of naiC followed byminimally invasive esophagectomy(MiE)with those of neoadjuvant chemotherapy(naC)followed by ***:A prospective,single-center,open-label,randomized phase Ⅲ clinical trial was conducted at Henan Cancer Hospital,Zhengzhou,*** were randomly assigned to receive either neoadjuvant toripalimab(240mg)plus paclitaxel(175 mg/m^(2))+cisplatin(75 mg/m^(2))(toripalimab group)or paclitaxel+cisplatin alone(chemotherapy group)every 3 weeks for 2 *** surgery,the toripalimab group received toripalimab(240 mg every 3 weeks for up to 6 months).The primary endpoint was event-free survival(EFS).The pathological complete response(pCR)and overall survival(OS)were key secondary *** events(AEs)and quality of life were also ***:Between may 15,2020 and August 13,2021,252 ESCC patients ranging fromT1N1-3M0 to T2-3N0-3M0were enrolled for interim analysis,with 127 in the toripalimab group and 125 in the chemotherapy *** 1-year EFS rate was 77.9%in the toripalimab group compared to 64.3%in the chemotherapy group(hazard ratio[HR]=0.62;95%confidence interval[Ci]=0.39 to 1.00;P=0.05).The 1-year OS rates were 94.1%and 83.0%in the toripalimab and chemotherapy groups,respectively(HR=0.48;95%Ci=0.24 to 0.97;P=0.037).The patients in the toripalimab group had a higher pCR rate(18.6%vs.4.6%;P=0.001).The rates of postoperative Clavien-Dindo grade Ⅲb or higher morbidity were 9.8%in the toripalimab group and 6.8%in the chemotherapy group,with no significant difference observed(P=0.460).The rates of grade 3 or 4 treatment-related AEs did not differ between the two groups(12.5%versus 12.4%).Conclusions:The interim results of this ongoing trial showed that in resec

关键词： esophageal squamous cell carcinoma minimally invasive esophagectomy neoadjuvant chemotherapy neoadjuvant immunochemotherapy survival

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From Fostering to Delusional Disorder of Filiation

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Open Journal of Psychiatry 2024年第4期14卷 283-286页

作者： Momar Camara Wissem masmoudi El Hadji makhtar ba Sokhna Seck maïmouna Dieye Aïda Sylla Department of Psychiatry and Medical Psychology Cheikh Anta Diop University Dakar Senegal Thiaroye national Psychiatric Hospital Center Dakar Senegal Fann national University Hospital Center Dakar Senegal Albert Royer Childrens Hospital Dakar Senegal

introduction: Fostering is a widespread practice in West Africa. it played an essential role in the circulation of children. The failure of its community regulation, not compensated by a legal framework, has made its practice precarious. Observation: A case study was conducted on Dior, who was hospitalised in a psychiatric ward for a delusional disorder of filiation. Dior was entrusted to her maternal grandmother and aunt at ages 2 and 9. During these fosterings, the place of the symbolic father was not substituted, causing a void that challenged her imagination. The outcome was an inscription in a genealogy where she had found herself with prestigious parents. Discussion: Fostering has strongly disrupted the family dynamics in Dior’s case. One of her options was to assume the paternal function, the use of which was perceived as a defiance or even a transgression. This same function would be a starting point of a psychosis whose filial character would only be an attempt at rectification where reality and imagination collide. Conclusion: Our study reveals the importance of stable parental figures at stake in fostering contexts, which constitute a risk factor for the development of a subsequent psychosis.

关键词： Delusional Disorder of Filiation Psychopathology interactions Fostering Family

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Cathodic corrosion as a facile and universal method for scalable preparation of powdery single atom electrocatalysts

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nano Research 2024年第6期17卷 4943-4950页

作者： Rui Li Xiayan Yan Meng Liu Qingkai Zhao Jie Du Xinxin Tan Jingwen ba Rongguang Zeng Wenhua Luo Jingsong Xu institute of materials China Academy of Engineering PhysicsJiangyou 621907China Science and Technology on Surface Physics and Chemistry Laboratory Jiangyou 621908China

Top-down strategy has been widely applied for synthesis of metal single atom catalysts(SACs)via converting metal nanoparticles or bulk metals into atomically dispersed ***,we report a simple electrochemical atomic migration strategy for top-down synthesis of SACs via a facile cathodic corrosion process without involving high temperature or harsh *** of metal nanoparticles on cathode are firstly disbanded under high negative voltage,and emitted into the electrolyte in the form of atomic metal anions in Zintl *** escaped atomically dispersed metal species are then oxidized by water molecules and captured by the defects on the pre-added nitrogen doped carbon carriers in the *** cathodic corrosion strategy is confirmed to be suitable for scalable synthesis of kinds of metal SACs(e.g.,Pt,Pd,and ir)on doped carbon ***,the as-prepared nitrogen doped carbon powder supported Pt SACs exhibit superior catalytic activity toward hydrogen evolution reaction(HER)with a low overpotential of 0.024 V at 10 ma·cm^(−2)and a low Tafel slope of 29.7 mV·dec^(−1)as well as a long-term durability.

关键词： cathodic corrosion top-down strategy powdery single atom catalysts hydrogen evolution reaction scalable synthesis

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Comparative studies between humans and golden Syrian hamsters via thromboelastography

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Animal Models and Experimental Medicine 2024年第4期7卷 570-577页

作者： Ze Yang Lili Xie Jingjing ba Simin Zan Letong Zhang Xinyi Zhang Yang Yu School of Laboratory Animal&Shandong Laboratory Animal Center Shandong First Medical University&Shandong Academy of Medical SciencesJinanChina The Second Affiliated Hospital of Shandong First Medical University TaianChina

background:Thromboelastography(TEG)is a widely utilized clinical testing method for real-time monitoring of platelet function and the thrombosis *** metab-olism disorders are crucial risk factors for *** lipid metabolism charac-teristics of hamsters resemble those of humans more closely than mice and rats,and their relatively large blood volume makes them suitable for studying the mechanisms of thrombosis related to plasma lipid *** blood samples from golden Syrian hamsters and healthy humans were obtained following standard clinical *** was employed to evaluate coagulation factor function,fibrinogen(Fib)function,platelet function,and the fibrinolytic ***:The whole blood from hamster or healthy human was isolated following the clinical procedure,and TEG was employed to evaluate the coagulation factor func-tion,Fib function,platelet function,and fibrinolytic *** analysis used ACLTOP750 automatic coagulation analysis *** routine testing used XN-2000 automatic blood ***:TEG parameters revealed that hamsters exhibited stronger coagulation fac-tor function than humans(reaction time[R],p=0.0117),with stronger Fib function(alpha angle,pime[K],pion did not differ signifi-cantly(maximum amplitude[ma],p=0.077).Hamsters displayed higher coagulation status than humans(coagulation index[Ci],p=0.0023),and the rate of blood clot dissolution in hamsters differed from that in humans(percentage lysis 30 min after ma,p=0.02).Coagulation analysis parameters indicated that prothrombin time(PT)and activated partial thromboplastin time(APTT)were faster in hamsters than in hu-mans(PT,p=0.0014;APTT,p=0.03),whereas the Fib content was significantly lower in hamsters than in humans(pignificant difference was observed in thrombin time(p=0.1949).Conclusions:in summary,TEG could be used to evaluate thrombosis and bleeding parameters in whole blood samples

关键词： platelet function Syrian hamster thromboelastography(TEG) thrombosis

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Alternative technology for the recovery of butyl acetate with low concentration:high capacity adsorbent and high efficiency adsorption

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Green Chemical Engineering 2024年第2期5卷 236-244页

作者： Chi ma Lihong Zhao Zhengxin mao Hao Su Qingfen Liu CAS Key Laboratory of Green Process and Engineering Institute of Process EngineeringChinese Academy of SciencesBeijing100190China School of Chemical Engineering University of Chinese Academy of SciencesBeijing100049China

industrial pharmaceutical wastewater usually contains butyl acetate(ba)with a concentration of 1 wt%-7 wt%,and the traditional method for ba recovery is distillation with high energy *** method is developed to recover ba with low concentration for the high efficiency and low energy *** polar polyacrylate resins with macroporous structure of 233.1 nm and average particle size of about 526.5μm are successfully synthesized by suspension polymerization and used for the ba adsorption and *** maximum adsorption capacity reaches 171.1 mg g^(-1)with relative standard deviation(RSD)value of 0.2%,which is more than twice the results in the *** ba desorption rate is 97.0%at 100℃with RSD value of 0.4%,and the resins are beneficial to the reuse in the adsorption-desorption *** adsorption thermodynamics and kinetics are investigated,and the ba adsorption is a spontaneous and endothermic process with the increase of disorder *** process is mainly contributed by physical absorption and agree well with Freundlich model and pseudo-first-order adsorption kinetic *** adsorption method avoids boiling a large amount of wastewater and hopefully provides a novel alternative technology for the ba recovery.

关键词： Butyl acetate recovery Resin adsorption Desorption Thermodynamics Kinetics

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Distinct SARS-CoV-2 populational immune backgrounds tolerate divergent RBD evolutionary preferences

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national Science Review 2024年第7期11卷 95-105页

作者： Wentai ma Haoyi Fu Fanchong Jian Yunlong Cao Mingkun Li Beijing institute of Genomics Chinese Academy of Sciencesand China National Center for Bioinformation University of Chinese Academy of Sciences Biomedical Pioneering innovation Center(BiOPiC) Peking University Changping Laboratory

immune evasion is a pivotal force shaping the evolution of viruses. Nonetheless, the extent to which virus evolution varies among populations with diverse immune backgrounds remains an unsolved mystery. Prior to the widespread SARS-CoV-2 infections in December 2022 and January 2023, the Chinese population possessed a markedly distinct(less potent) immune background due to its low infection rate, compared to countries experiencing multiple infection waves, presenting an unprecedented opportunity to investigate how the virus has evolved under different immune contexts. We compared the mutation spectrum and functional potential of the newly derived mutations that occurred in ba.5.2.48, BF.7.14 and ba.5.2.49—variants prevalent in China—with their counterparts in other countries. We found that the emerging mutations in the receptor-binding-domain region in these lineages were more widely dispersed and evenly distributed across different epitopes. These mutations led to a higher angiotensin-converting enzyme 2(ACE2) binding affinity and reduced potential for immune evasion compared to their counterparts in other countries. These findings suggest a milder immune pressure and less evident immune imprinting within the Chinese population. Despite the emergence of numerous immune-evading variants in China, none of them outcompeted the original strain until the arrival of the XBB variant, which had stronger immune evasion and subsequently outcompeted all circulating variants. Our findings demonstrated that the continuously changing immune background led to varying evolutionary pressures on SARS-CoV-2. Thus, in addition to viral genome surveillance, immune background surveillance is also imperative for predicting forthcoming mutations and understanding how these variants spread in the population.

关键词： SARS-CoV-2 evolution mutation population immunity

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Enhancing corrosion resistance of plasma electrolytic oxidation coatings on AM50 Mg alloy by inhibitor containing ba(NO_(3))_(2) solutions

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international Journal of Minerals,Metallurgy and materials 2024年第9期31卷 2048-2061页

作者： Jirui ma Xiaopeng Lu Santosh Prasad Sah Qianqian Chen You Zhang Fuhui Wang Corrosion and Protection Center Northeastern UniversityShenyang110819China Faculty of Engineering Hokkaido UniversityHokkaido 060-8628Japan College of New materials and Chemical Engineering Beijing Institute of Petrochemical TechnologyBeijing 102617China

To enhance the long-term corrosion resistance of the plasma electrolytic oxidation(PEO)coating on the magnesium(Mg)alloy,an inorganic salt combined with corrosion inhibitors was used for posttreatment of the *** this study,the corrosion performance of PEO-coated AM50 Mg was significantly improved by loading sodium lauryl sulfonate(SDS)and sodium dodecyl benzene sulf-onate into ba(NO_(3))_(2) post-sealing *** electron microscopy,X-ray photoelectron spectroscopy,X-ray diffraction,Fourier transform infrared spectrometer,and ultraviolet-visible analyses showed that the inhibitors enhanced the incorporation of baO_(2) into PEO *** impedance showed that post-sealing in ba(NO_(3))_(2)/SDS treatment enhanced corrosion resistance by three orders of *** total impedance value remained at 926Ω·cm^(2)after immersing in a 0.5wt%naCl solution for 768 h.A salt spray test for 40 days did not show any obvious region of corrosion,proving excellent post-sealing by ba(NO_(3))_(2)/SDS *** corrosion resistance of the coating was enhanced through the synergistic effect of baO2 pore sealing and SDS adsorption.

关键词： Mg plasma electrolytic oxidation posttreatment corrosion resistance

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Robust neutralization of SARS-CoV-2 variants including JN.1 and ba.2.87.1 by trivalent XBB vaccine-induced antibodies

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Signal Transduction and Targeted Therapy 2024年第6期9卷 2359-2361页

作者： Xun Wang Shujun Jiang Wentai ma Yanliang Zhang Pengfei Wang Shanghai Pudong Hospital Fudan University Pudong Medical CenterState Key Laboratory of Genetic EngineeringMOE Engineering Research Center of Gene TechnologySchool of Life SciencesShanghai Institute of Infectious Disease and BiosecurityFudan UniversityShanghaiChina Department of infectious Diseases Nanjing Hospital of Chinese Medicine Affiliated to Nanjing University of Chinese MedicineNanjing Research Center for Infectious Diseases of Integrated Traditional Chinese and Western MedicineNanjingJiangsuChina Beijing institute of Genomics Chinese Academy of SciencesUniversity of Chinese Academy of Sciences and China National Center for BioinformationBeijingChina

Dear Editor,The rapid and widespread transmission of SARS-CoV-2 has led to the emergence of multiple variants of concern(VOCs),most notably the Omicron variant,which continues to evolve and diversify into a range of *** previous research has shown that these Omicron sub-lineages,spanning ba.1-ba.2.86,have been evolving to exhibit increased neutralization escape capabilities.

关键词： evolve neutralization variants

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