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Serrated flow behavior of GH536 superalloy under different loading rates at room temperature

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Rare Metals 2024年第5期43卷 2317-2323页

作者： Wen-Xiang Gao Dong Ma Li-Li Zhao fan ye Ling Shao Su-Jun Wu School of Materials Science and Technology Beihang UniversityBeijing100091China

Serrated flow phenomenon has been widely observed among different metals due to the potential influence on their *** tensile tests of nickel-based superalloy GH536 were carried out at loading rates of 0.06,0.60,3.60,and 36.00 mm·min^(-1)at room temperature,*** tensile stress-strain curves demonstrate repetitive and discontinuous yielding behavior,namely serrated *** is observed that the stress-strain curves were dominated by type B serration,and original annealing twin boundaries(TBs)were distorted to various degrees under comparatively different lower tensile *** contrast,the TBs almost disappear,and the type B serrations become smoother and regular under the higher loading *** phenomenon can be attributed to the interactions between TBs and dislocations during tensile *** effects of the mobile and immobile dislocations illustrate the unsteady amplitude of serrations observed in stress-strain *** electron microscope images of tested pieces reveal the interaction of dislocation and TB,with dislocation tangling around the TBs.

关键词： Nickel-based superalloy Serrations Twin boundaries Deformation mechanism

Self-adjuvant Astragalus polysaccharide-based nanovaccines for enhanced tumor immunotherapy:a novel delivery system candidate for tumor vaccines

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Science China(Life Sciences) 2024年第4期67卷 680-697页

作者： Nan Li Yun Zhang Miaomiao Han Tian Liu Jinjia Wu Yingxia Xiong Yikai fan fan ye Bing Jin Yinghua Zhang Guibo Sun Xiaobo Sun Zhengqi Dong State Key Laboratory for Quality Ensurance and Sustainable Use of Dao-di Herbs Chinese Academy of Medical Sciences&Peking Union Medical College(CAMS)Institute of Medicinal Plant Development(IMPLAD)Beijing 100193China Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine from Ministry of Education Beijing Key Laboratory of Innovative Drug Discovery of Traditional Chinese Medicine(Natural Medicine)and Translational MedicineKey Laboratory of New Drug Discovery Based on Classic Chinese Medicine Prescription from Chinese Academy of Medical SciencesCAMSIMPLADBeijing 100193China Department of Pharmaceutics School of Pharmaceutical SciencesHeilongjiang University of Chinese MedicineHarbin 150036China Jilin Academy of Chinese Medicine Sciences Changchun 130012China Joint Research Center for Chinese Medicinal Herbs IMPLADABRC&ACCLBeijing 100193China

The study of tumor nanovaccines(NVs)has gained interest because they specifically recognize and eliminate tumor ***,the poor recognition and internalization by dendritic cells(DCs)and insufficient immunogenicity restricted the vaccine ***,we extracted two molecular-weight Astragalus polysaccharides(APS,12.19 k D;APSHMw,135.67 k D)from Radix Astragali and made them self-assemble with OVA257–264directly forming OVA/APS integrated nanocomplexes through the microfluidic *** nanocomplexes were wrapped with a sheddable calcium phosphate layer to improve *** in the formed nanocomplexes served as drug carriers and immune adjuvants for potent tumor *** optimal APS-NVs were approximately 160 nm with uniform size distribution and could remain stable in physiological saline *** FITC-OVA in APS-NVs could be effectively taken up by DCs,and APS-NVs could stimulate the maturation of DCs,improving the antigen cross-presentation efficiency in *** possible mechanism was that APS can induce DC activation via multiple receptors such as dectin-1 and Toll-like receptors 2 and *** accumulation of APS-NVs both in draining and distal lymph nodes were observed following *** APS-NVs could easily access the lymph ***,APS-NVs could markedly promote antigen delivery efficiency to DCs and activate cytotoxic T *** addition,APS-NVs achieve a better antitumor effect in established B16-OVA melanoma tumors compared with the OVA+Alum treatment *** antitumor mechanism correlated with the increase in cytotoxic T cells in the tumor ***,the poor tumor inhibitory effect of APS-NVs on the nude mouse model of melanoma also confirmed the participation of antitumor adaptive immune response induced by ***,this study developed a promising APS-based tumor NV that is an efficient tumor immunotherapy without systemic side effects.

关键词： Astragalus polysaccharides nanovaccines OVA immunotherapy self-adjuvant

Mpox(formerly monkeypox):pathogenesis,prevention,and treatment

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Signal Transduction and Targeted Therapy 2024年第1期9卷 234-248页

作者： Junjie Lu Hui Xing Chunhua Wang Mengjun Tang Changcheng Wu fan ye Lijuan Yin Yang Yang Wenjie Tan Liang Shen Xiangyang Central Hospital Affiliated Hospital of Hubei University of Arts and ScienceHubei ProvinceXiangyang 441021China NHC Key Laboratory of Biosafety National Institute for Viral Disease Control and PreventionChinese Center for Disease Control and PreventionBeijing 102206China College of Biotechnology Tianjin University of Science&TechnologyTianjin 300457China Shenzhen Key Laboratory of Pathogen and Immunity National Clinical Research Center for infectious diseaseState Key Discipline of Infectious DiseaseShenzhen Third People’s HospitalSecond Hospital Affiliated to Southern University of Science and TechnologyShenzhen 518112China

In 2022,a global outbreak of Mpox(formerly monkeypox)occurred in various countries across Europe and America and rapidly spread to more than 100 countries and *** World Health Organization declared the outbreak to be a public health emergency of international concern due to the rapid spread of the Mpox ***,nations intensified their efforts to explore treatment strategies aimed at combating the infection and its ***,the available therapeutic options for Mpox virus infection remain *** far,only a few numbers of antiviral compounds have been approved by regulatory *** the high mutability of the Mpox virus,certain mutant strains have shown resistance to existing pharmaceutical *** highlights the urgent need to develop novel antiviral drugs that can combat both drug resistance and the potential threat of ***,there is a lack of comprehensive literature on the pathophysiology and treatment of *** address this issue,we conducted a review covering the physiological and pathological processes of Mpox infection,summarizing the latest progress of anti-Mpox *** analysis encompasses approved drugs currently employed in clinical settings,as well as newly identified small-molecule compounds and antibody drugs displaying potential antiviral efficacy against ***,we have gained valuable insights from the process of Mpox drug development,including strategies for repurposing drugs,the discovery of drug targets driven by artificial intelligence,and preclinical drug *** purpose of this review is to provide readers with a comprehensive overview of the current knowledge on Mpox.

关键词： prevention treatment intensified

Structures and ion transport mechanisms of plant high-affinity potassium transporters

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Molecular Plant 2024年第3期17卷 409-422页

作者： Jiangqin Wang Yanping Luo fan ye Zhong Jie Ding Shao Jian Zheng Shuai Qiao Yong Wang Jiangtao Guo Wei Yang Nannan Su international Institutes of Medicine the Fourth Affiliated HospitalZhejang University School of MedicineYiwuZhejiang 322000China Department of Biophysics and Department of Neurology of the Fourth Affiliated Hospital Zhejiang University School of MedicineHangzhouZhejang 310058China State Key Laboratory of Plant Environmental Resilience College of Life SciencesZhejang UniversityHangzhouZhejang 310058China College of Life Sciences Zhejiang UniversityHangzhouZhejiang 310058China NHC and CAMS Key Laboratory of Medical Neurobiology MOE Frontier Science Center for Brain Science and Brain-machine IntegrationSchool of Brain Science and Brain MedicineZhejiang UniversityHangzhouZhejiang 310058China Nanhu Brain-computer Interface Institute Hangzhou.Zheiang 311100.China

Plant high-affinity K^(+) transporters(HKTs)mediate Na^(+) and K^(+) uptake,maintain Na^(+)/K^(+) homeostasis,and therefore play crucial roles in plant salt *** this study,we present cryoelectron microscopy structures of HKTs from two classes,classI HKT1;1 from Arabidopsis thaliana(AtHKT1;1)and class II HKT2;1 from Triticum aestivum(TaHKT2;1),in both Na^(+) -and K^(+) -bound states at 2.6-to 3.0-A ***1;1and TaHKT2;1function *** HKT subunit consists of four tan-dem domain units(D1-D4)with a repeated K^(+) -channel-like M-P-M *** each subunit,D1-D4 assemble into an ion conduction pore with a pseudo-four-fold *** both TaHKT2;1and AtHKT1;1 have only one putative Na^(+) ion bound in the selectivity filter with a similar coordination pattern,the two HKTs display different K^(+) binding modes in the ***2;1 has three K^(+) ions bound in the selec-tivity filter,but AtHKT1;1 has only two K^(+) ions bound in the filter,which has a narrowed external entrance due to the presence of a Ser residue in the first filter *** structures,along with compu-tational,mutational,and electrophysiological analyses,enable us to pinpoint key residues that are critical for the ion selectivity of *** findings provide new insights into the ion selectivity and ion transport mechanisms of plant HKTs and improve our understanding about how HKTs mediate plant salt tolerance and enhance crop growth.

关键词： HKTs structure ion selectivity mechanism salt tolerance

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聚苯颗粒复合保温砂浆的制备及性能研究

功能材料 2024年第9期55卷 9164-9171页

作者：范晔兰州理工大学土木工程学院兰州730050 甘肃第七建设集团股份有限公司兰州730000

以聚苯乙烯颗粒(EPS)为砂浆的增强相,先通过三乙醇胺对聚苯颗粒进行表面处理,然后制备出聚苯颗粒复合保温砂浆,研究了三乙醇胺用量对聚苯颗粒水接触角的影响,并探究了其对复合保温砂浆力学性能、微观形貌、干缩性能和导热性能的影响。... 详细信息

以聚苯乙烯颗粒(EPS)为砂浆的增强相,先通过三乙醇胺对聚苯颗粒进行表面处理,然后制备出聚苯颗粒复合保温砂浆,研究了三乙醇胺用量对聚苯颗粒水接触角的影响,并探究了其对复合保温砂浆力学性能、微观形貌、干缩性能和导热性能的影响。结果表明,三乙醇胺改性处理降低了聚苯颗粒的水接触角,聚苯颗粒由疏水性转变为亲水性。三乙醇胺用量的增加降低了复合保温砂浆的稠度,增大了干密度,EPS-5%试样的稠度最低为8.8 cm,干密度最高为237 kg/m 3。随着三乙醇胺用量的增加,复合保温砂浆的吸水率先降低后逐渐趋于平稳,抗压强度、抗折强度、压剪粘接强度和软化系数均先增大后降低,干燥收缩率和导热系数先减小后增大。EPS-5%试样的吸水率最低为0.62%,软化系数最大为0.63,该试样在28 d龄期的抗压强度、抗折强度和压剪粘接强度达到最大值,分别为2.05,0.64和0.26 MPa。在7 d时,EPS-5%试样的干燥收缩率最低为0.0385%,导热系数最低为0.045 W/(m·K),保温性能最优。

关键词：聚苯颗粒三乙醇胺保温砂浆亲水改性干缩性能导热系数

Insulin-like growth factor 2 targets IGF1R signaling transduction to facilitate metastasis and imatinib resistance in gastrointestinal stromal tumors

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World Journal of Gastrointestinal Oncology 2024年第8期16卷 3585-3599页

作者： De-Gang Li Jia-Peng Jiang fan-ye Chen Wei Wu Jun Fu Gong-He Wang Yu-Bo Li Department of Gastrointestinal and Anorectal Surgery The First Affiliated Hospital of Guangxi University of Chinese MedicineNanning 530023Guangxi Zhuang Autonomous RegionChina

BACKGROUND Gastrointestinal stromal tumors(GISTs)are typical gastrointestinal tract *** is the first-line therapy for GIST *** resistance limits the long-term effectiveness of *** regulatory effect of insulin-like growth factor 2(IGF2)has been confirmed in various cancers and is related to resistance to chemotherapy and a worse *** To further investigate the mechanism of IGF2 specific to *** IGF2 was screened and analyzed using Gene Expression Omnibus(GEO:GSE225819)*** IGF2 knockdown or overexpression by transfection,the phenotypes(proliferation,migration,invasion,apoptosis)of GIST cells were characterized by cell counting kit 8,Transwell,and flow cytometry *** used western blotting to evaluate pathway-associated and epithelial-mesenchymal transition(EMT)-associated *** injected transfected cells into nude mice to establish a tumor xenograft model and observed the occurrence and metastasis of *** Data from the GEO indicated that IGF2 expression is high in GISTs,associated with liver metastasis,and closely related to drug *** cells with high expression of IGF2 had increased proliferation and migration,invasiveness and *** of IGF2 significantly inhibited those *** addition,OEIGF2 promoted GIST metastasis in vivo in nude ***2 activated IGF1R signaling in GIST cells,and IGF2/IGF1R-mediated glycolysis was required for GIST with liver *** cells with IGF2 knockdown were sensitive to imatinib treatment when IGF2 overexpression significantly raised imatinib ***,2-deoxy-D-glucose(a glycolysis inhibitor)treatment reversed IGF2 overexpressionmediated imatinib resistance in *** IGF2 targeting of IGF1R signaling inhibited metastasis and decreased imatinib resistance by driving glycolysis in GISTs.

关键词： Insulin-like growth factor 2 Gastrointestinal stromal tumors IGF1R Glycolysis Imatinib resistance

COVID-19 pandemic amplified mortality rates among adolescents with bipolar disorder through family-related factors

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World Journal of Clinical Cases 2024年第11期12卷 1929-1935页

作者： Zhuo-fan ye Yi-Han Hong Jian-Lin Yang Meng-Qing Tan Ju-Min Xie Zu-Cai Xu Department of Neurology The Affiliated Hospital of Zunyi Medical UniversityZunyi 563000Guizhou ProvinceChina Hubei Key Laboratory of Renal Disease Occurrence and Intervention Medical SchoolHubei Polytechnic UniversityHuangshi 435003Hubei ProvinceChina Psychological Children's Ward Mental Health Center of HuangshiHuangshi 435111Hubei ProvinceChina The Collaborative Innovation Center of Tissue Damage Repair and Regeneration Medicine Zunyi Medical UniversityZunyi 563000Guizhou ProvinceChina

BACKGROUND Recently,a growing number of adolescents have been afflicted with mental disorders,with annual morbidity rates on the *** trend has been exacerbated by the global coronavirus disease 2019(COVID-19)pandemic,leading to a surge in suicide and self-harm rates among this *** To investigate the impact of the COVID-19 pandemic on adolescent bipolar disorder(BD),along with the underlying factors contributing to heightened rates of suicide and self-harm among *** A comprehensive statistical analysis was conducted utilizing clinical interviews and self-reports obtained from patients or their *** criteria for BDs were based on the Diagnostic and statistical manual of mental disorders,international classification of diseases-11,and the National institute of mental health research domain *** analyses were performed using SPSS 26.0 software,with significance set at Pyears *** factors contributing to adolescent BDs included familial influences,academic stress,genetic predisposition and exposure to school-related ***,a significant increase in suicide attempts and self-harm incidents was observed among adolescents with BD during the COVID-19 *** analysis indicated that the pandemic exacerbated familial discord and heightened academic stress,thereby amplifying the prevalence of suicidal behavior and self-harm among *** The COVID-19 pandemic has exacerbated familial tensions and intensified the incidence of suicide and self-harm among adolescents diagnosed with *** study underscores the urgent need for societal,familial and educational support systems to prioritize the well-being of adolescents and offers valuable insights and guidelines

关键词： Adolescents Bipolar disorder COVID-19 Suicide Self-harm

双眼眼前节生物学参数的差值诊断早期圆锥角膜的临床研究

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国际眼科杂志 2024年第8期24卷 1285-1290页

作者：叶凡薛劲松南京医科大学附属眼科医院江苏省南京市210029 南京医科大学第四临床医学院江苏省南京市210029

目的:探讨双眼眼前节生物学参数的差值对早期圆锥角膜的诊断价值。方法:回顾性对照研究。选取2022-03/2023-11在我院就诊的患者183例366眼,其中亚临床期圆锥角膜组40例80眼,临床期圆锥角膜组36例72眼,单纯屈光不正患者107例214眼作为对... 详细信息

目的:探讨双眼眼前节生物学参数的差值对早期圆锥角膜的诊断价值。方法:回顾性对照研究。选取2022-03/2023-11在我院就诊的患者183例366眼,其中亚临床期圆锥角膜组40例80眼,临床期圆锥角膜组36例72眼,单纯屈光不正患者107例214眼作为对照组,均采用Pentacam眼前节分析仪检测双眼角膜后表面下方与上方3 mm屈光力差值(I-S),角膜后表面最薄点高度(P.E.),最佳拟合球体的最大后表面高度(MPE from BFS)、最佳拟合复曲面椭圆体的最大后表面高度(MPE from BFTE)、角膜后表面非球面不对称指数(AAI)、角膜中央厚度(CCT)、角膜最薄点厚度(TCT)、角膜平均厚度进展(PPIavg)、角膜厚度最大变化率(ARTmax)、Belin/Ambrósio增强扩张显示总偏差值(BAD-D),并分别计算每例患者各检测指标的双眼差值。对照组根据角膜直径进一步分为:角膜直径11.8 mm组32例64眼。结果:临床期圆锥角膜组与对照组双眼I-S、P.E.、MPE from BFS、MPE from BFTE、AAI、CCT、TCT、PPIavg、ARTmax、BAD-D差值均有差异(P0.05),且均与角膜直径无相关性(P>0.05);不同角膜直径组双眼P.E.、BAD-D差值比较有差异(P=0.007、0.003),而双眼P.E.差值与角膜直径无相关性(P=0.270),双眼BAD-D差值与角膜直径负相关(r=-0.230,P=0.017)。结论:Pentacam眼前节分析仪可以准确测量多种角膜生物学参数,双眼I-S、P.E.、BAD-D差值是诊断亚临床期圆锥角膜的敏感指标,其中双眼I-S、P.E.差值受角膜直径影响较小,对不同直径角膜的亚临床期圆锥角膜诊断有着重要的临床意义。

关键词：亚临床圆锥角膜圆锥角膜 Pentacam眼前节分析仪角膜后表面高度

Experimental investigation of closed-loop active control to modulate coherent structures by mu-level method

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Chinese Physics B 2024年第7期33卷 408-417页

作者：白建侠范子椰姜楠李秋营郑小波 Department of Mathematics Tianjin Renai CollegeTianjin 301636China Institute of Mechanics Department of MechanicsSchool of Mechanical EngineeringTianjin UniversityTianjin 300354China College of Energy and Power Engineering Lanzhou University of TechnologyLanzhou 730050China Tianjin Key Laboratory of Modern Engineering Mechanics Tianjin 300354China

The experimental research on zero-net-mass-flux jet closed-loop active control was conducted in the wind *** mu-level method successfully detected burst events of the coherent structures. The streamwise velocity signals in the turbulent boundary layer were measured by HWA. The drag reduction rate of 16.7% is obtained comparable to that of the open-loop control and saves 75% of the input energy at the asynchronous 100 V/160 Hz control case, which reflects the advantages of the closed-loop control. The experimental findings indicate that the intensity increases in the near-wall *** perturbation of the PZT vibrators on the skewness factor is concentrated in the region y+< 60. The generation of highspeed fluids is depressed and the downward effect of high-speed fluids weakens. The alteration of energy distribution and the discernible impact of modulation between structures of varying scales are observed. The correlation coefficient exhibits a strong positive correlation, which indicates that the large-scale structures produce modulation effect on small-scale *** occurrence of burst events is effectively suppressed. The disturbance has the characteristics of stable periodicity,positive and negative symmetry, low intermittency, and high pulsation strength. The conditional phase waveform shows that the fluctuation amplitude increases, indicating amplitude modulation effects on coherent structures.

关键词： turbulent boundary layer(TBL) burst event coherent structures mu-level method