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Effects of impregnation sequence on the NH_(3)-SCR activity and hydrothermal stability of a Ce-Nb/SnO_(2) catalyst

Journal of Environmental Sciences 2024年第4期138卷 450-457页

作者： Ying z.u Wenpo Shan z.ihua lian Jingjing Liu Yan z.ang Hong He Center for Excellence in Regional Atmospheric Environment and Key Laboratory of Urban Pollutant Conversion Institute of Urban EnvironmentChinese Academy of SciencesXiamen 361021China z.ejiang Key Laboratory of Urban Environmental Processes and Pollution Control Ningbo Urban Environment Observation and Research StationInstitute of Urban EnvironmentChinese Academy of SciencesNingbo 315800China State Key Joint Laboratory of Environment Simulation and Pollution Control Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China University of Chinese Academy of Sciences Beijing 100049China

Hydrothermal stability is crucial for the practical application of deNO_(x)catalyst on diesel vehicles,for the selective catalytic reduction of NO_(x)with NH_(3)(NH_(3)-SCR).SnO_(2)-based materials possess superior hydrothermal stability,which is attractive for the development of NH_(3)-SCR *** this work,a series of Ce-Nb/SnO_(2)catalysts,with Ce and Nb loading on SnO_(2)support,were prepared by impregnation *** was found that,the NH_(3)-SCR activities and hydrothermal stabilities of the Ce-Nb/SnO_(2)catalysts significantly varied with the impregnation sequences,and the Ce-Nb(f)/SnO_(2) catalyst that firstly impregnated Nb and then impregnated Ce exhibited the best *** characteriz.tion results revealed that CeNb(f)/SnO_(2)possessed appropriate acidity and redox ***,the strong synergistic effect between Nb and Sn species stabiliz.d the structure and maintained the dispersion of acid *** study may provide a new understanding for the effect of impregnation sequence on activity and hydrothermal stability and a new environmental-friendly NH_(3)-SCR catalyst with potential applications for NO_(x)removal from diesel and hydrogenfueled engines.

关键词： NO_(x)emission control NH_(3)-SCR Hydrothermal stability Ce-Nb/SnO_(2)catalyst Impregnation sequence

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Enhancing pediatric asthma management through multifaceted health education

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World Journal of Clinical Cases 2024年第19期12卷 3708-3716页

作者： Guang-Qun Lin z.-Qiong Ye En-lian Song Yu-Nan Lin Department of Pediatrics First Affiliated Hospital of Guangxi Medical UniversityNanning 530021Guangxi Zhuang Autonomous RegionChina Day Surgery Ward First Affiliated Hospital of Guangxi Medical UniversityNanning 530021Guangxi Zhuang Autonomous RegionChina Anesthesia&Operation Center First Affiliated Hospital of Guangxi Medical UniversityNanning 530021Guangxi Zhuang Autonomous RegionChina

BACKGROUND Pediatric asthma is a significant public health issue that impacts the quality of life of children *** management approaches focus on symptom control and medication adherence but often overlook the comprehensive educational needs of patients and their families.A multifaceted health education approach may offer a more holistic strategy in managing pediatric asthma,especially in outpatient *** To evaluate the efficacy of a comprehensive health education strategy in improving disease management,medication adherence,and quality of life among children with asthma in outpatient *** In total,100 pediatric patients with severe asthma were enrolled from January 2021 to November 2022 and randomly allocated to a control group(n=50)or an observation group(n=50).The control group received standard nursing care,including basic nursing interventions and health education upon *** contrast,the observation group was exposed to a broad spectrum of health education methodologies,including internet-based hospital systems,social media channels,one-on-one verbal education,informational brochures,slide present ations,telephone check-ins,animated videos,and illustrated health education *** on asthma management knowledge,symptom control,quality of life[***’s Respiratory Questionnaire(SGRQ)],treatment adherence,and nursing satisfaction were collected and *** The scores of the observation group in knowledge areas,such as medication,home care,disease understanding,symptom management,prevention strategies,and nutritional guidance,were significantly higher than those of the control group(P<0.05).In addition,the observation group exhibited greater symptom control,improved quality of life based on their SGRQ scores,and higher treatment adherence post-intervention(P<0.05).Nursing satisfaction was also rated higher in the observation group across all evaluated areas(P<0.05).CONCLUSION Implementing a diversified hea

关键词： Multifaceted health education mode Pediatrics Outpatient service Bronchial asthma

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Assessing the range of blasting-induced cracks in the surrounding rock of deeply buried tunnels based on the unified strength theory

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Journal of Central South University 2024年第7期31卷 2341-2364页

作者： LI liang CHEN Jia-jun z.AO lian-heng HE Ke-pei HU Shi-hong LI Hua-long School of Civil Engineering Central South UniversityChangsha 410075China Key Laboratory of Heavy-haul Railway Engineering Structure Ministry of EducationCentral South UniversityChangsha 410075China Hunan Provincial Key Laboratory for Disaster Prevention and Mitigation of Rail Transit Engineering Structure Central South UniversityChangsha 410075China

Blasting-induced cracks in the rock surrounding deeply buried tunnels can result in water gushing and rock mass collapse,posing significant safety ***,previous theoretical studies on the range of blasting-induced cracks often ignore the impact of the in-situ stress,especially that of the intermediate principal *** particle displacement−crack radius relationship was established in this paper by utiliz.ng the blasthole cavity expansion equation,and theoretical analytical formulas of the stress−displacement relationship and the crack radius were derived with unified strength theory to accurately assess the range of cracks in deep surrounding rock under a blasting *** analysis showed that the crushing z.ne siz. was positively correlated with in-situ stress,intermediate principal stress,and detonation pressure,whereas negatively correlated with Poisson ratio and decoupling *** dilatancy angle-crushing z.ne siz. relationship exhibited nonmonotonic *** relationships in the crushing z.ne and the fracture z.ne exhibited opposite trends under the influence of only in-situ stress or intermediate principal *** the in-situ stress increased from 0 to 70 MPa,the rate of change in the crack range and the attenuation rate of the peak vibration velocity gradually slowed.

关键词： deep drilling and blasting cracks in surrounding rock unified strength theory intermediate principle stress in-situ stress cavity expansion dilatancy characteristics

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Micro femoral head prosthesis in applications to collapsed femoral head necrosis in the weight-bearing dome(ARCO III):A case series with short-term follow-up

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Chinese Medical Journal 2024年第6期137卷 737-739页

作者： z.ongz.eng Wang Yuchuan Wang Tianyu Wang Yining Lu Xiaodong lian Yanbin z.u Wei Chen z.iyong Hou Yingz. z.ang Department of Orthopaedic Surgery Hebei Medical University Third HospitalShijiazhuangHebei 050051China Key Laboratory of Biomechanics of Hebei Province ShijiazhuangHebei 050051China NHC Key Laboratory of Intelligent Orthopaedic Equipment ShijiazhuangHebei 050051China Chinese Academy of Engineering Beijing 100088China

Osteonecrosis of the femoral head(ONFH)is mainly caused by a decrease in the vascular supply to the subchondral bone of the femoral head,leading to the death of bone cells,degeneration and necrosis of the subchondral bone,and eventually collapse of the femoral head.^([1])Early and accurate diagnosis is the key to successful hip-preserving therapy,and the siz./location of necrosis is the main determinant for ONFH *** studies have shown that many hip-preserving therapies achieved satisfactory results in ONFH patients with Association Research Circulation Osseous(ARCO)I–*** ONFH progresses to ARCO IV with clinical manifestations of osteoarthrosis,total hip arthroplasty(THA)may be the only option.

关键词： ARCO diagnosis death head

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Distinct clinical profiles and mutation landscapes of gliomas originating from the neocortex,mesocortex,and cerebellum

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Genes & Diseases 2024年第1期11卷 53-56页

作者： Ye Cheng Lei z.ang Xiaolong Wu Hiroaki Wakimoto Haoming Geng Yukui Wei Geng Xu Xinru Xiao Jie Bai Yaming Wang z.liang Hu Leiming Wang Qingtang lian Department of Neurosurgery Xuanwu HospitalCapital Medical UniversityBeijing 100053China Brain Tumor Research Center Massachusetts General HospitalDepartment of NeurosurgeryHarvard Medical SchoolBostonMA02134USA Department of Pathology Xuanwu HospitalCapital Medical UniversityBeijing 100053China

Gliomas originating from anatomically and developmentally distinct brain regions have different clinical ***,the molecular landscape underlying this difference remains *** analyz.d key molecular mutations via sequencing and correlated them with clinical characteristics in 180 adult patients with gliomas originating from the neocortex,mesocortex,and *** of cerebellar origin had significantly longer survival than those of supratentorial origin,consistent with higher rates of mutation in key genes associated with supratentorial gliomas.

关键词： clinical cortex glioma

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含碳三原子分子结构与电子亲和能的计算

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物理学报 2024年第10期73卷 88-95页

作者：单石敏连艺徐海峰闫冰中北大学半导体与物理学院太原030051 吉林大学原子与分子物理研究所长春130012

本文分别采用单、双和微扰处理三激发耦合簇方法与自旋非限制的开壳层耦合簇方法对CO_(2),OCS,CS_(2)及其对应阴离子CO_(2)^(-),OCS^(-),CS_(2)^(-)进行高精度的从头算研究.我们计算了这些分子在一系列相关一致基组aug-cc-pV(X+d)z.(X=T... 详细信息

本文分别采用单、双和微扰处理三激发耦合簇方法与自旋非限制的开壳层耦合簇方法对CO_(2),OCS,CS_(2)及其对应阴离子CO_(2)^(-),OCS^(-),CS_(2)^(-)进行高精度的从头算研究.我们计算了这些分子在一系列相关一致基组aug-cc-pV(X+d)z.(X=T,Q,5)以及完全基组极限下的基态平衡几何结构,并研究了芯-价电子相关与标量相对论效应的影响,计算结果与已有文献报道结果吻合较好.基于计算的几何结构,获得了中性分子CO_(2),OCS,CS_(2)的绝热电子亲和能,系统考察了不同基组以及零点能修正对这些分子电子亲和能的影响,给出了考虑各种修正下3种分子准确的电子亲和能.本文将丰富含碳三原子分子的光谱常数和电子亲和能等分子参数的信息,可为实验光谱研究提供重要参考.

关键词：耦合簇方法含碳三原子分子平衡几何结构电子亲和能

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Intramedullary nailing for irreducible spiral subtrochanteric fractures:A comparison of cerclage and non-cerclage wiring

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Chinese Journal of Traumatology 2024年第5期27卷 305-310页

作者： Yan-Hui Guo z.an-Lin Song Hua-Yong z.eng Jie Gao Yi-Yun Lin z.i Liu lian-Hua Li Department of Orthopedics The Seventh Medical Center of Chinese People's Liberation Army General HospitalBeijing100048China Department of Orthopedics The Fourth Medical Center of Chinese People's Liberation Army General HospitalBeijing100048China

Purpose:Intramedullary nailing is the preferred internal fixation technique for the treatment of subtrochanteric fractures because of its biomechanical ***,no definitive conclusion has been reached regarding whether combined cable cerclage is required during intramedullary nailing *** study is performed to compare the clinical effects of intramedullary nailing with cerclage and non-cerclage wiring in the treatment of irreducible spiral subtrochanteric ***:Patients with subtrochanteric fractures admitted to our center from January 2013 to December 2021 were retrospectively *** patients were enrolled in the case-control study according to the inclusion and exclusion criteria and divided into the non-cerclage group and the cerclage *** patients'clinical data,including the operative time,intraoperative blood loss,hospital stay,reoperation rate,fracture union time,and Harris hip score,were compared between these 2 *** variables were compared using Chi-square or Fisher's exact *** variables with normal distribution were presented as mean±standard deviation and analyz.d with Student's *** distributed variables were expressed as median(Q_(1),Q_(3))and assessed using the Mann-Whitney test.A pz.-0.391,p=0.696),operative time(z.-1.289,p=0.197),or intraoperative blood loss(z.-1.321,p=0.186).However,compared with non-cerclage group,the fracture union time was shorter(z.-5.587,pz.-2.99,p=0.003)in the cerclage group,all with statistically significant dif

关键词： Hip fracture Subtrochanteric fracture Intramedullary nail Cerclage wiring

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阴道分娩后胎盘因素性产后出血的处理与思考

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中国实用妇科与产科杂志 2024年第4期40卷 399-402页

作者：陈练赵扬玉北京大学第三医院妇产科国家妇产疾病临床医学研究中心国家产科专业医疗质量控制中心北京100191

产后出血仍然是全球性问题,在孕产妇死亡原因中占近1/4。宫缩乏力一直是产后出血的首要原因,但近年来随着孕产妇疾病谱的变化、妊娠年龄后移、辅助生殖技术的应用和宫腔操作的增加,胎盘因素导致的产后出血呈现上升趋势。其中,第三产程... 详细信息

产后出血仍然是全球性问题,在孕产妇死亡原因中占近1/4。宫缩乏力一直是产后出血的首要原因,但近年来随着孕产妇疾病谱的变化、妊娠年龄后移、辅助生殖技术的应用和宫腔操作的增加,胎盘因素导致的产后出血呈现上升趋势。其中,第三产程胎盘滞留是阴道分娩后胎盘因素性产后出血最为关键的临床问题,如处理不恰当,可能会导致严重产后出血、多脏器功能损害甚至产妇死亡。文章就如何针对胎盘滞留的原因进行鉴别并给予正确的处理进行了探讨,同时提出了未来进一步研究的方向。

关键词：阴道分娩胎盘滞留产后出血处理分型

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CENPF基因在肾透明细胞癌组织中的表达及临床意义

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中国免疫学杂志 2024年第8期40卷 1671-1676页

作者：廉明哲黄晋徐洪清楚厦门市第五医院检验科厦门361101

目的:探究CENPF在肾透明细胞癌(KIRC)中的表达及临床意义。方法:利用UALCAN和HPA数据库分析CENPF在KIRC与癌旁组织中的表达差异;通过GEPIA数据库分析CENPF基因与KIRC患者临床病理学参数及预后的关系;通过TIMER数据库分析CENPF与KIRC免... 详细信息

目的:探究CENPF在肾透明细胞癌(KIRC)中的表达及临床意义。方法:利用UALCAN和HPA数据库分析CENPF在KIRC与癌旁组织中的表达差异;通过GEPIA数据库分析CENPF基因与KIRC患者临床病理学参数及预后的关系;通过TIMER数据库分析CENPF与KIRC免疫浸润水平的关系;基于UALCAN数据库调取TCGA数据库中KIRC患者CENPF的共表达基因,并进行GO聚类分析和KEGG分析。通过转染siRNA干扰ACHN和786-O细胞中CENPF的表达并通过RT-PCR和Western blot方法进行验证。采用CCK-8、Transwell和细胞克隆形成实验探究CENPF在肾癌细胞系中下调表达后对ACHN和786-O细胞的增殖、迁移和细胞克隆形成能力的影响。结果:根据数据库显示在KIRC患者中CENPF的表达显著增加。CENPF高表达与总体存活率(OS)和无病存活率(DFS)呈负相关。KIRC患者中CENPF表达量与其肿瘤微环境中的肿瘤细胞纯度、巨噬细胞、CD8+T细胞、CD4+T细胞、中性粒细胞和树突状细胞表达丰度呈显著正相关;相关功能网络分析表明CENPF可能通过调控细胞周期、细胞有丝分裂和DNA修复等途径参与KIRC发生。此外,CENPF的mRNA表达在肾癌细胞系中也有增加。CCK-8实验表明CENPF基因沉默抑制ACHN和786-O细胞增殖。Transwell实验结果表明,CENPF基因沉默对KIRC细胞迁移能力有明显影响。细胞克隆形成实验结果表明,干扰CENPF基因表达抑制了786-O细胞的克隆形成能力。结论:本研究表明CENPF在KIRC进展中起关键作用。CENPF作为KIRC的预后指标和潜在靶点具有前瞻性的临床意义。

关键词： CENPF 肾透明细胞癌细胞增殖免疫浸润

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自我效能感与大学生网络成瘾:自我控制的中介作用

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中国临床心理学杂志 2024年第2期32卷 371-373页

作者：陈雪莲苏宇涵张钊湖北中医药大学医学人文学院武汉430065 湖北时珍实验室武汉430065 武汉理工大学心理健康教育中心武汉430070

目的:考察大学生的自我效能感与网络成瘾的关系,分析自我控制在二者之间的中介作用。方法:采用一般自我效能感量表、自我控制量表和网络成瘾量表对321名大学生进行调查。结果:大学生的自我效能感与网络成瘾呈负相关,网络成瘾和自我控制... 详细信息

目的:考察大学生的自我效能感与网络成瘾的关系,分析自我控制在二者之间的中介作用。方法:采用一般自我效能感量表、自我控制量表和网络成瘾量表对321名大学生进行调查。结果:大学生的自我效能感与网络成瘾呈负相关,网络成瘾和自我控制呈负相关,自我效能感与自我控制呈正相关。中介效应检验显示自我控制在自我效能感与网络成瘾之间起完全中介作用。结论:大学生的自我效能感能够负向预测网络成瘾程度。自我效能感通过提高自我控制水平进而降低大学生网络成瘾风险。

关键词：自我效能感自我控制网络成瘾

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