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A novel 3D printed technology to construct a monolithic ultrathin nanosheets Co_(3)O_(4)/SiO_(2) catalyst for benzene catalytic combustion

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Nano Research 2023年第10期16卷 12173-12185页

作者： yuntai Xi Fang Dong Xin Xu Shixing Wu Zhicheng Tang Jiyi zhang State Key Laboratory for Oxo Synthesis and Selective Oxidation National Engineering Research Center for Fine Petrochemical IntermediatesLanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000China School of Petroleum and Chemical Lanzhou University of TechnologyLanzhou 730050China Dalian National Laboratory for Clean Energy Dalian 116023China Key Laboratory of Materials-Oriented Chemical Engineering of Xinjiang Uygur Autonomous Region School of Chemistry and Chemical EngineeringShihezi UniversityShihezi 832003China

In this study,a novel three-dimensional(3D)-OMm-Co_(3)O_(4)/SiO_(2)-0.5AP(OMm=ordered macro–meso porous,AP=aluminum phosphate)monolithic catalyst was for the first time constructed successfully with the hierarchical Co-phyllosilicate ultrathin nanosheets growth on the surface of 3D printed ordered macropore–mesoporous SiO_(2)support.On the one hand,we discovered that the construction of ordered macropore–mesoporous structures is beneficial to the diffusion and adsorption of reactants,intermediates,and products.On the other hand,the formation of hierarchical Co-phyllosilicate ultrathin nanosheets could provide more active Co&+species,abundant acid sites,and active oxygen.The above factors are in favor of improving the catalytic performance of benzene oxidation,and then a 3D-OMm-Co_(3)O_(4)/SiO_(2)-0.5AP catalyst exhibited the superior catalytic activity.To explore the effect of catalysts structure and morphology,various Co-based catalysts were also constructed.Simultaneously,the 3D-OMm-Co_(3)O_(4)/SiO_(2)-0.5AP catalyst has excellent catalytic performance,water resistance,and thermal stability in the catalytic combustion of benzene due to the strong interactions between Co&+species and SiO_(2)in the phyllosilicate.Therefore,this study proposes a new catalyst synthesis method through 3D printing,and presents considerable prospects for the removal of VOCs from industrial applications.

关键词： Co-phyllosilicate three-dimensional(3D)printing ordered porous volatile organic compounds(VOCs) catalytic oxidation

Heparin-induced thrombocytopenia in patients undergoing cardiac surgery

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中国循环杂志 2018年第S1期33卷 170-171页

作者： Mingzhe zhang yuntai Yao Department of Anesthesiology Dingzhou people's HospitalHebeiChina Anesthesia Center National Center for Cardiovascular DiseasesFuwai HospitalChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijingChina

Objective Heparin-induced thrombocytopenia(HIT)is a complication characterized by thrombocytopenia,hemorrhage and/or thrombosis,which is caused by initial or repeated application of unfractionated heparin(UFH)and low-molecular-weight heparin(LMWH).This study aims to summarize the clinical features of HIT in patients undergoing cardiac surgery.

关键词： Heparin-induced thrombocytopenia unfractionated heparin low-molecular-weight heparin

Penehyclidine Hydrochloride Premedication Is Not Associated with Increased Incidence of Post-Operative Cognitive Dysfunction or Delirium:A Systemic Review and Meta-Analysis

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Chinese Medical Sciences Journal 2020年第2期35卷 121-134页

作者： yuntai Yao Hua Ying Nengxin Fang Yongbao zhang Xin Yuan Department of Anesthesiology Fuwai HospitalNational Center for Cardiovascular DiseasesChinese Academy of Medical Sciences&Peking Union Medical CollegeBeijing 100037China Department of Vascular Surgery Fuwai HospitalNational Center for Cardiovascular DiseasesChinese Academy of Medical Sciences&Peking Union Medical CollegeBeijing 100037China Department of Adult Cardiac Surgery Fuwai HospitalNational Center for Cardiovascular DiseasesChinese Academy of Medical Sciences&Peking Union Medical CollegeBeijing 100037China Department of Orthopaedics Shanghai Key Laboratory of Orthopaedic ImplantsShanghai Ninth People's HospitalShanghai Jiaotong University School of MedicineShanghai 200011China

Objective Post-operative cognitive dysfunction(POCD)and post-operative delirium(POD)are two common post-operative cerebral complications.The current meta-analysis was to systematically review the effects of penehyclidine hydrochloride(PHC)on POCD and POD in surgical patients.Methods Electronic databases were searched to identify all randomized controlled trials comparing PHC with atropine/scopolamine/placebo on POCD and POD in surgical patients.Primary outcomes of interest included the incidences of POCD and POD;the secondary outcomes of interest included peri-operative minimental state examination(MMSE)scores.Two authors independently extracted peri-operative data,including patients'baseline characteristics,surgical variables,and outcome data.For dichotomous data(POCD and POD occurrence),treatment effects were calculated as odds ratio(OR)and 95%confidential interval(Cl).Each outcome was tested for heterogeneity,and randomized-effects or fixed-effects model was used in the presence or absence of significant heterogeneity.For continuous variables(MMSE scores),treatment effects were calculated as weighted mean difference(WMD)and 95%CI.Statistical significance was defined as P<0.05.Results Our search yielded 33 studies including 4017 patients.Meta-analysis showed that,the incidence of POCD in PHC group was comparable to that in saline group(OR=0.97;95%Ck 0.S8-1.64;P=0.92),scopolamine group(OR=0.78;95%CI:0.48-1.27;P=0.32)and atropine group(0R=1.20;95%Ch 0.86-1.67;P=0.29).The incidence of POD in PHC group was comparable to that in saline group(OR=1.53;95%CI:0.81-2.90;P=0.19)and scopolamine group(OR=0.53;95%CI:0.06-4.56;P=0.56),but higher than that in atropine group(OR=4.49;95%CI:1.34-15.01;P=0.01).Conclusions PHC premedication was not associated with increased incidences of POCD or POD as compared to either scopolamine or placebo.

关键词： penehyclidine hydrochloride post-operative cognitive dysfunction post-operative delirium meta-analysis

2013年岷漳地震和2014年景谷地震的能矩比对比研究

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地球物理学报 2020年第9期63卷 3324-3337页

作者：宋金陈运泰张勇中国地震局地球物理研究所北京100081 中国地震台网中心北京100045 中国科学院大学地球与行星科学学院北京100049 北京大学地球与空间科学学院北京100871

2013年岷漳地震和2014年景谷地震两个地震的矩震级均为M W6.1,但相同等级烈度区域的面积差异显著,前者均明显大于后者.地面震动的强烈程度与震源破裂过程中辐射的地震波高频成分密切相关,作者系统地测定与研究了这两个地震的震源谱和反... 详细信息

2013年岷漳地震和2014年景谷地震两个地震的矩震级均为M W6.1,但相同等级烈度区域的面积差异显著,前者均明显大于后者.地面震动的强烈程度与震源破裂过程中辐射的地震波高频成分密切相关,作者系统地测定与研究了这两个地震的震源谱和反映其震源特征的能矩比等震源参量.结果表明,虽然岷漳地震和景谷地震释放的地震矩基本相同,分别为1.6×10^18 Nm和1.8×10^18 Nm,而且前者还比后者略小些,但其释放的地震波辐射能却差异显著,分别为1.3×10^14 J和0.6×10^14 J;因而前者的能矩比(8.1×10^-5)是后者能矩比(3.3×10^-5)的大约2.5倍.相应地,岷漳地震的视应力和应力降也都明显大于景谷地震的视应力和应力降.此外,这两个地震震源谱结果均显示出其高频趋势均按角频率ω的-2幂次衰减,符合“ω2模式”;采用理论震源谱公式计算结果分别约占实际结果的54%和50%,两个地震的地震波辐射能解析解之间的差异依然约2.3倍.震源破裂特征的显著差异导致岷漳地震单位地震矩释放的地震波辐射能更多,即岷漳地震能矩比更大,是导致这两个矩震级均为M W6.1地震的地震烈度差异显著的一个重要原因.

关键词：岷漳地震景谷地震等震线震源谱能矩比 ω2模式

Rapid source inversions of the 2023 SE Türkiye earthquakes with teleseismic and strong-motion data

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地震学报:英文版 2023年第4期36卷 316-327页

作者： Chenyu Xu Yong zhang Sibo Hua Xu zhang Lisheng Xu yuntai Chen Tuncay Taymaz School of Earth and Space Sciences Peking UniversityBeijing 100871China Institute of Geophysics China Earthquake AdministrationBeijing 100081China Istanbul Technical University The Faculty of MinesDepartment of Geophysical Engineering34467 SariyerIstanbulTürkiye

We conducted rapid inversions of rupture process for the 2023 earthquake doublet occurred in SE Türkiye,the first with a magnitude of M_(W)7.8 and the second with a magnitude of M_(W)7.6,using teleseismic and strong-motion data.The teleseismic rupture models of the both events were obtained approximately 88 and 55 minutes after their occurrences,respectively.The rupture models indicated that the first event was an asymmetric bilateral event with ruptures mainly propagating to the northeast,while the second one was a unilateral event with ruptures propagating to the west.This information could be useful in locating the meizoseismal areas.Compared with teleseismic models,the strong-motion models showed relatively higher resolution.A noticeable difference was found for the M_(W)7.6 earthquake,for which the strong-motion models shows a bilateral event,rather than a unilateral event,but the dominant rupture direction is still westward.Nevertheless,all strong-motion models are consistent with the teleseismic models in terms of magnitudes,durations,and dominant rupture directions.This suggests that both teleseismic and strong-motion data can be used for fast determination of major source characteristics.In contrast,the strong-motion data would be preferable in future emergency responses since they are recorded earlier and have a better resolution ability on the source ruptures.

关键词： the 2023 earthquake doublet in SE Türkiye fast source inversion teleseismic inversion strong-motion inversion

2018年M_W4.3河北永清地震的震源机制与破裂特征

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科学通报 2018年第22期63卷 2296-2301页

作者：张勇陈运泰宋金北京大学地球与空间科学学院北京100871 中国地震局地球物理研究所北京100081 中国地震台网中心北京100045

采用区域宽频带地震波数据,反演确定了2018年2月12日河北永清地震的地震矩张量解和破裂过程.震源机制结果显示,这次地震的矩心深度约为16 km,发生在走向北东、倾向南西的断层上,断层错动以左旋走滑为主、兼具少量正断层分量.破裂模型显... 详细信息

采用区域宽频带地震波数据,反演确定了2018年2月12日河北永清地震的地震矩张量解和破裂过程.震源机制结果显示,这次地震的矩心深度约为16 km,发生在走向北东、倾向南西的断层上,断层错动以左旋走滑为主、兼具少量正断层分量.破裂模型显示,地震的最大滑动量约为1.3 cm,破裂尺度约2 km,二者皆明显高于根据现有地震定标律估计得到的结果.断层最大应力降和平均应力降分别约为0.6和0.3 MPa,明显低于板内地震应力降平均水平.分析认为,这一较低的应力降水平与缺少余震的"孤立型"地震序列对应,反映了较弱的断层强度和破碎的震源区介质,可能是华北部分地区地震的共有特征.

关键词：永清地震震源机制破裂过程

青藏高原东缘及东北缘S波速度结构和径向各向异性

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地球物理学报 2019年第12期62卷 4554-4570页

作者：杨志高陈运泰张雪梅宋晓东中国地震局地球物理研究所北京100081 中国地震台网中心地震台网部北京100045 中国科学院大学地球与行星科学学院北京100049 北京大学地球与空间科学学院北京100871 Department of Geology University of Illinois at Urbana-ChampaignIL 61801USA

青藏东缘和东北缘是高原生长和扩张的前缘,研究其地下物质及变形特征有助于理解青藏高原生长机制.本文收集187个固定地震台站记录的长达7年的三分量连续波形数据,辅以189个流动台站3年的数据,开展噪声瑞利波和勒夫波群速度层析成像工作... 详细信息

青藏东缘和东北缘是高原生长和扩张的前缘,研究其地下物质及变形特征有助于理解青藏高原生长机制.本文收集187个固定地震台站记录的长达7年的三分量连续波形数据,辅以189个流动台站3年的数据,开展噪声瑞利波和勒夫波群速度层析成像工作.基于8~40 s周期瑞利波和勒夫波群速度,通过线性反演方法得到地下50 km深度范围的三维SH和SV速度结构.我们定义径向各向异性ψ=2(v SH-v SV)/(v SH+v SV),以此来展示地下物质变形以水平方向(v SH>v SV)还是垂直方向(v SH

关键词：青藏高原径向各向异性噪声层析成像高原生长机制

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心脏手术后失明:文献回顾分析

中国分子心脏病学杂志 2022年第3期22卷 4693-4698页

作者：张博何丽仙姚允泰天津市人民医院麻醉科天津市300121 中国医学科学院阜外医院北京市100037

目的总结心脏手术后失明患者的临床表现、诊断、治疗及预后。方法以中文检索词“失明”“眼部并发症”“缺血性视神经病变”“皮质盲”“视网膜动脉阻塞”“心脏手术”“体外循环”等检索中国知网、万方数据库、维普数据库,以英文检索词... 详细信息

目的总结心脏手术后失明患者的临床表现、诊断、治疗及预后。方法以中文检索词“失明”“眼部并发症”“缺血性视神经病变”“皮质盲”“视网膜动脉阻塞”“心脏手术”“体外循环”等检索中国知网、万方数据库、维普数据库,以英文检索词“blindness”“visual loss”“ischemic optic neuropathy”“cortical blindness”“central retinal artery occlusion”“cardiac surgery”“cardiopulmonary bypass”“coronary artery bypass graft”“valve surgery”“aortic surgery”“congenital heart diseases”“heart transplantation”等检索Pubmed、OVID、Embase所有报道心脏手术后失明的个案报道(截止2020年12月23日发表)。下载相关全文文献,阅读总结、分析患者的基础情况(例如:年龄、性别)、外科手术(例如:手术类型、手术持续时间)和视觉缺陷特征(例如:发病时间、诊断、危险因素和预后),统计患者年龄、性别、手术类型、病理类型、危险因素和预后各类别例数。结果共44篇文献(68例患者)符合纳入标准。在68例患者中,男53例,女15例。患者年龄9个月至79岁。手术时间1.5~13 h。视力下降出现在术后1 h至134 d。68例术后失明的心脏手术患者中,35例被诊断为缺血性视神经病变(ischemic optic neuropathy,ION),19例为皮质盲(cortical blindness,CB),1例为视网膜中央动脉阻塞(central retinal artery occlusion,CRAO),13例为其他原因。术后失明的危险因素可分为患者特异性和手术相关。前者包括吸烟、高血压、高胆固醇、糖尿病、颈动脉狭窄、拥挤的视神经盘(或低杯/盘比)等。后者包括低血压、手术时间延长、静脉压升高、低红细胞压积、液体输注过多、失血过多、血管活性药物等。随访期间,10例皮质盲患者、4例缺血性视神经病变患者和7例其他患者的视力均有改善。结论缺血性视神经病变和皮质盲是心脏手术后失明的两个最常见原因。在处理视力障碍患者时,术前识别高危患者、术中适当的麻醉管理和术后早期视力评估都是重要的。

关键词：失明心脏手术

表观扩散系数在术前预测子宫内膜癌肌层浸润、Ki-67和P53表达水平的临床价值

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磁共振成像 2023年第7期14卷 78-85页

作者：张萌景梦园曹云太郭钰珍兰州大学第二医院妇科兰州730030 兰州大学第二医院放射科兰州730030 青海大学附属医院放射科西宁810000

目的探讨表观扩散系数(apparent diffusion coefficient,ADC)值在术前无创性预测子宫内膜癌(endometrial carcinoma,EC)患者子宫肌层浸润(myometrial infiltration,MI)、Ki-67和P53表达水平的可行性。材料与方法回顾性分析兰州大学第二医院2017年1月至2021年12月期间在术前接受MRI扩散加权成像(diffusion weighted imaging,DWI)检查并在术后经病理证实的105名EC患者临床资料和影像数据,两名独立的放射科医生分别对照MRI增强和DWI图像在ADC图像上测量EC的最大ADC值(ADCmax)、平均ADC值(ADCmean)及最小ADC值(ADCmin)。采用二元logistic回归筛选EC患者的临床信息、ADC值与MI、Ki-67和P53表达的相关性,构建列线图预测模型,并绘制受试者工作特征(receiver operating characteristic,ROC)曲线、校准曲线和临床决策曲线(decision curve analysis,DCA)对预测模型进行评价。结果ADCmax、ADCmean和ADCmin与EC患者MI、Ki-67和P53表达水平显著相关(P<0.05),而国际妇产科学联合会(the International Federation of Gynecology and Obstetrics,FIGO)分期仅与EC患者MI和Ki-67表达水平显著相关(P<0.05)。将ADCmax、ADCmean、ADCmin与FIGO分期结合起来构建列线图模型,预测模型、ADCmax、ADCmean、ADCmin和FIGO分期预测MI的ROC曲线下面积(area under the curve,AUC)值分别为0.809、0.707、0.693、0.694和0.599;预测Ki-67表达水平的AUC值分别为0.897、0.879、0.849、0.808和0.550。结合ADCmax、ADCmean、ADCmin构建列线图模型,预测模型、ADCmax、ADCmean和ADCmin预测P53表达水平的AUC值分别为0.665、0.615、0.641和0.654。结论基于ADC值联合FIGO分期构建的列线图预测模型可作为一种有效方法在术前无创性评估EC患者MI、Ki-67和P53表达。

关键词：子宫内膜癌子宫肌层浸润 Ki-67 P53 磁共振成像表观扩散系数