检索结果-南通市图书馆

Metal-organic frameworks with dinuclear metal centers for synergistically boosting CO2 photoreduction

Science China Chemistry 2025年第1期68卷 201-208页

作者： Hui-Feng Wang Wen-Jie Shi yu-xin yang Bao-Xia Dong Tong-Bu Lu Di-Chang Zhong School of Chemistry and Chemical Engineering Yangzhou University Institute for New Energy Materials and Low Carbon Technologies School of Materials Science and Engineering Tianjin University of Technology

Dinuclear metal synergistic catalysis （DMSC） has been proved powerful in boosting CO2reduction,while this has not been achieved in heterogeneous catalysts with long-range order *** this study,we,by introduction of metal catalytic centers into an indium-based metal-organic framework （MOF）,obtained a series of isostructural In-MOFs,including three MOFs with mononuclear metal catalytic center （M-In）,three MOFs with dinuclear homometallic catalytic centers （MM-In）,and three MOFs with dinuclear heterometallic catalytic centers (MM’-In,M/M’=Co（II）,Ni（II）,Zn（II）).It was found that all these MOFs can serve as catalysts for photochemical CO2reduction to *** with M-In,the catalytic activities of MM-In were obviously enhanced,and that of MM’-In was further significantly *** example,the CO yield of Co Zn-In reaches a record value of 12,700μmol g-1h-1,which is 4.0,8.1,9.4,and 18.6-fold higher than that of Co Co-In,Zn Zn-In,Co-In,and Zn-In,***,the catalytic activities of Co Ni-In and Ni Zn-In also show different fold increase than those of corresponding dinuclear homometallic and mononuclear metallic *** results of control experiments and theoretical calculation reveal that the higher catalytic activities of MM-In over M-In can be ascribed to the DMSC effect,and the higher catalytic activity of MM’-In over MM-In can be ascribed to the strengthened DMSC *** work reveals the relationship between DMSC effect and bimetal centers in CO2reduction,which provides new insights into the DMSC and paves a new way to design highly active catalysts for photochemical CO2reduction.

关键词： metal-organic frameworks dinuclear metal centers synergistic catalysis CO2 reduction photocatalysis

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Analysis of in-bore magnetic field in C-shaped armature railguns

引用

Defence Technology（防务技术） 2019年第1期15卷 83-88页

作者： Qiang Yin He Zhang Hao-jie Li yu-xin yang Ministerial Key Laboratory of ZNDY Nanjing University of Science and Technology

In order to analysis the distribution characteristics of in-bore magnetic field for C-shaped armature electromagnetic railgun, a computational model considering dynamic contact pressure is established. By solving the dynamic equation, the in-bore motion characteristics of the armature are obtained. The distribution of current in the rail and armature is analyzed based on the magnetic diffusion equation and Ampere’s law. On this basis, three simulation models are proposed, which correspond to static state,motion state and motion state considering the velocity skin effect. The magnetic field of the investigated points along the central axes of the armature front end are obtained. The results show that, in static state,the peak magnetic flux density of each investigated point is greater than the other two states. Velocity skin effect leads to a decrease in peak magnetic flux density. The change of motion state has little influence on the peak magnetic flux density of the investigated point that far away from the armature. The calculated results can be used in the electromagnetic shielding design of intelligent ammunition.

关键词： Railgun C-shaped armature Magnetic flux density

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Analysis of bacterial community structures in two sewage treatment plants with different sludge properties and treatment performance by nested PCR-DGGE method

引用

Journal of Environmental Sciences 2007年第1期19卷 60-66页

作者： LIU xin-chun ZHANG yu yang Min WANG Zhen-yu LV Wen-zhou State Key Laboratory of Environmental Aquatic Chemistry Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beifing 100085 China

The bacterial community structures in two sewage treatment plants with different processes and performance were investigated by denaturing gradient gel electrophoresis （DGGE） of nested polymerase chain reaction （nested PCR） amplified 16S rRNA gene fragments with group-specific primers. Samples of raw sewage and treated effluents were amplified using the whole-cell PCR method, and the activated sludge samples were amplified using the extracted genomic DNA before the PCR products were loaded on the same DGGE gel for bacterial community analysis. Ammonia-oxidizing bacterial and actinomycetic community analysis were also carried out to investigate the relationship between specific population structures and system or sludge performance. The two plants demonstrated a similarity in bacterial community structures of raw sewage and activated sludge, but they had different effluent populations. Many dominant bacterial populations of raw sewage did not appear in the activated sludge samples, suggesting that the dominant bacterial populations in raw sewage might not play an important role during wastewater treatment. Although the two plants had different sludge properties in terms of settleability and foam forming ability, they demonstrated similar actinomycetic community structures. For activated sludge with bad settling performance, the treated water presented a similar DGGE pattern with that of activated sludge, indicating the nonselective washout of bacteria from the system. The plant with better ammonium removal efficiency showed higher ammonia-oxidizing bacteria species richness. Analysis of sequencing results showed that the major populations in raw sewage were uncultured bacterium, while in activated sludge the predominant populations were beta proteobacteria.

关键词： activated sludge wastewater treatment sewage community analysis PCR-DGGE

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Large carotid body tumor successfully resected in hybrid operating theatre: A case report

引用

World Journal of Clinical Cases 2019年第16期7卷 2346-2351页

作者： Meng-Qi Li Yan Zhao Huai-yu Sun xin-yu yang Department of Neurosurgery Tianjin Medical University General HospitalTianjin 300052China Department of Neurosurgery TieMei General Hospital of Liaoning Health Company Affiliated Shenyang Medical CollegeTieling 112000Liaoning ProvinceChina

BACKGROUND Surgical treatment for large carotid body tumor (CBT),particularly the Shamblin III type,is challenging and rarely *** SUMMARY In July 2014,a 63-year-old woman presented to our hospital with a large CBT (130 mm × 60 mm × 70 mm).The lesion was hypervascular,spanned from the first to the seventh cervical vertebra,and adhered to the right common carotid artery (CCA),internal carotid artery (ICA) and external carotid artery (ECA).The resection was carried out in a hybrid operating ***,we used Onyx gel to embolize the feeding *** ICA balloon was used to prevent gel entry into the *** shrinkage and hardening of the CBT,we quickly resected the CBT as well as a part of the ECA that adhered to the CBT.A vascular shunt was inserted between CCA and ICA,and the part where the ICA was cut off from the CCA was directly sutured.A follow-up at four years later showed no neurological *** For large hypervascular CBT,embolization of the feeding artery prior to resection is *** hybrid operating theatre is the ideal platform to carry out such operations.

关键词： Carotid body tumor Paraganglioma Hybrid operating theatre Interventional embolization Case report

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

How likely is septic shock to develop in a patient with Fournier’s gangrene?A risk prediction model based on a 7-year retrospective study

引用

Gastroenterology Report 2022年第1期10卷 430-439页

作者： yang yang Li-Chun Wang xin-yang yu Xiao-Fei Zhang Zhong-Qing yang yang-Zi Zheng Bin-Yan Jiang Lei Chen Department of Critical Care Medicine The Sixth Affiliated HospitalSun Yat-sen UniversityGuangzhouGuangdongP.R.China Department of Applied Mathematics The Hong Kong Polytechnic UniversityHong Kong SARChina

Background Fournier’s gangrene(FG)is a rare life-threatening form of necrotizing *** risk factors for septic shock in patients with FG are *** study aimed to identify potential risk factors and develop a prediction model for septic shock in patients with *** This retrospective cohort study included patients who were treated for FG between May 2013 and May 2020 at the Sixth Affiliated Hospital,Sun Yat-sen University(Guangzhou,China).The patients were divided into a septic shock group and a non-septic shock *** L1-penalized logistic regression model was used to detect the main effect of important factors and a penalized Quadratic Discriminant Analysis method was used to identify possible interaction effects between different *** selected main factors and interactions were used to obtain a logistic regression model based on the Bayesian information *** A total of 113 patients with FG were enrolled and allocated to the septic shock group(n=24)or non-septic shock group(n=89).The best model selected identified by backward logistic regression based on Bayesian information criterion selected temperature,platelets,total bilirubin(TBIL)level,and pneumatosis on pelvic computed tomography/magnetic resonance images as the main linear effect and Na^(+)×TBIL as the interaction *** area under the ROC curve of the probability of FG with septic shock by our model was 0.84(95%confidence interval,0.78–0.95).The Harrell’s concordance index for the nomogramwas 0.864(95%confidence interval,0.78–0.95).Conclusion We have developed a prediction model for evaluation of the risk of septic shock in patients with FG that could assist clinicians in identifying critically ill patients with FG and prevent them from reaching a crisis state.

关键词： Fournier’s gangrene sepsis septic shock nomogram risk prediction

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Effect of viral hepatitis on type 2 diabetes:A Mendelian randomization study

引用

World Journal of Diabetes 2024年第2期15卷 220-231页

作者： yun-Feng yu Gang Hu Ke-Ke Tong xin-yu yang Jing-Yi Wu Rong yu The First Hospital of Hunan University of Chinese Medicine Changsha 410007Hunan ProvinceChina The Hospital of Hunan University of Traditional Chinese Medicine Changde 415213Hunan ProvinceChina College of Chinese Medicine Hunan University of Chinese MedicineChangsha 410208Hunan ProvinceChina The Third Hospital of Zhejiang Chinese Medical University Hangzhou 310005Zhejiang ProvinceChina

BACKGROUND The effects of viral hepatitis(VH)on type 2 diabetes(T2D)remain *** To analyze the causal correlation between different types of VH and T2D using Mendelian randomization(MR).METHODS Single nucleotide polymorphisms of VH,chronic hepatitis B(CHB),chronic hepatitis C(CHC)and T2D were obtained from the BioBank Japan Project,European Bioinformatics Institute,and *** variance weighted,MREgger,and weighted median were used to test exposure-outcome *** MR-Egger intercept analysis and Cochran’s Q test were used to assess horizontal pleiotropy and heterogeneity,***-one-out sensitivity analysis was used to evaluate the robustness of the MR analysis *** The MR analysis showed no significant causal relationship between VH and T2D in Europeans[odds ratio(OR)=1.028;95%confidence interval(CI):0.995-1.062,P=0.101].There was a negative causal association between CHB and T2D among East Asians(OR=0.949;95%CI:0.931-0.968,P0.05).Sensitivity analysis showed that the results were *** Among East Asians,CHB is associated with a reduced T2D risk,but this association is limited by HBV load and *** VH among Europeans and CHC among East Asians are not associated with the risk of T2D,focusing on blood glucose in patients with CHC is still relevant for the early detection of T2D induced by CHCmediated pathways of hepatic steatosis,liver fibrosis,and cirrhosis.

关键词： Viral hepatitis Chronic hepatitis B Chronic hepatitis C Type 2 diabetes Mendelian randomization

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Formation of G-phase in 20Cr32Ni1Nb Stainless Steel and its Effect on Mechanical Properties

引用

Acta Metallurgica Sinica(English Letters) 2017年第9期30卷 829-839页

作者： Xiao-Feng Guo Ying-Ying Ni Jian-Ming Gong Lu-yang Geng Jian-Qun Tang Yong Jiang Xian-Kai Jia xin-yu yang School of Mechanical and Power Engineering Nanjing Tech UniversityNanjing 211816China Key Lab of Design and Manufacture of Extreme Pressure Equipment Nanjing 210037China

A series of tensile tests, Charpy impact tests, optical microscopy observations, and field emission-scanning electron microscopy examinations, were carded out to investigate the mechanical properties and microstructural evolution of 20Cr32NilNb steel. Experimental results indicate that the as-cast microstructure of the steel typically consists of a supersaturated solid solution of austenite matrix with a network of interdendritic primary carbides （NbC and M23C6）. In the ex-service samples, large amounts of secondary carbides precipitate within austenite matrix. Besides the growth and coarsening of NbC and M23C6 carbides during service condition, the Ni-Nb silicides known as G-phase （Nil6Nb6Si7） are formed at the interdendritic boundaries. The microstructural evolution results in the degradation of the mechanical properties of the ex-service steel. In addition, the precipitate rate of G-phase, depending in part on Si content, varies greatly for the 20Cr32NilNb steel, which plays a key role in the long-term microstructural stability of the steel. Based on the X-ray diffraction data, time-temperature-transformation curve for the steel is obtained from the aged specimens.

关键词： 20Cr32NilNb Embrittlement G-phase TTT dial, ram

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Does type 1 diabetes serve as a protective factor against inflammatory bowel disease:A Mendelian randomization study

引用

World Journal of Diabetes 2024年第7期15卷 1551-1561页

作者： Ke-Ke Tong yun-Feng yu xin-yu yang Jing-Yi Wu Rong yu Chuan-Chuan Tan The First Hospital of Hunan University of Chinese Medicine Changsha 410007Hunan ProvinceChina School of Traditional Chinese Medicine Hunan University of Chinese MedicineChangsha 410208Hunan ProvinceChina The Third Hospital Zhejiang Chinese Medical UniversityHangzhou 310005Zhejiang ProvinceChina

BACKGROUND The impact of type 1 diabetes(T1D)on inflammatory bowel disease(IBD)remains *** To analyze the causal relationship between T1D and IBD using Mendelian randomization(MR).METHODS Single nucleotide polymorphisms were sourced from FinnGen for T1D,IBD,ulcerative colitis(UC)and Crohn’s disease(CD).Inverse variance-weighted,MREgger,and weighted median tests were used to assess exposure-outcome *** MR-Egger intercept was used to assess horizontal ***’s Q and leave-one-out method were used to analyze heterogeneity and sensitivity,*** Our MR analysis indicated that T1D was associated with a reduced risk of IBD[odds ratio(OR):0.959;95%confidence interval(CI):0.938-0.980;P0.05).Cochran’s Q and leave-one-out sensitivity analyses showed that the results were not heterogeneous(P>0.05)and were *** This MR analysis suggests that T1D serves as a potential protective factor against IBD and UC but is independent of CD.

关键词： Type 1 diabetes Inflammatory bowel disease Ulcerative colitis Crohn’s disease Mendelian randomization

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Highly Stretchable and Conductive Hybrid Fibers for High-performance Fibrous Electrodes and All-solid-state Supercapacitors

引用

Chinese Journal of Polymer Science 2020年第5期38卷 531-539,I0007页

作者： Gui-Qing Wu xin-yu yang Jia-Hui Li Nan Sheng Cheng-Yi Hou Yao-Gang Li Hong-Zhi Wang State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringDonghua UniversityShanghai 201620China School of Materials Science and Engineering Nanyang Technological University639798Singapore

The development of lightweight,flexible,and stretchable energy storage systems is essential for state-of-the-art electronic *** propose a new and broad strategy to fabricate a stretchable and conductive GO/CNTs-TPU fiber electrode by direct wet spinning,from which a flexible fibrous supercapacitor is *** fibrous electrode exhibits a high strength of 11.68 MPa,high conductivity of 342 S/cm,and high specific capacitances(21.8 mF/cm,36.45 F/cm^3,and 95 F/g).The specific capacitance of the assembled all-solid-state hybrid fiber-shaped supercapacitor reaches 14.3 F/cm^*** 5000 charge-discharge cycles,97%of the capacitance of the hybrid supercapacitor is *** high-strength electrochemical electrode materials could be potential candidates for applications in practical and large-scale energy storage systems and textile clothes.

关键词： Graphene Carbon nanotubes Thermoplastic polyurethane Supercapacitor Flexibility

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Targeting TrkB–PSD-95 coupling to mitigate neurological disorders

引用

Neural Regeneration Research 2025年第3期20卷 715-724页

作者： xin yang yu-Wen Alvin Huang John Marshall Department of Molecular Biology Cell Biology and BiochemistryBrown UniversityProvidenceRIUSA Department of Neurology Warren Alpert Medical School of Brown UniversityProvidenceRIUSA Center for Translational Neuroscience Robert J.and Nancy D.Carney Institute for Brain Science and Brown Institute for Translational ScienceBrown UniversityProvidenceRIUSA

Tropomyosin receptor kinase B(TrkB)signaling plays a pivotal role in dendritic growth and dendritic spine formation to promote learning and *** activity-dependent release of brain-derived neurotrophic factor at synapses binds to pre-or postsynaptic TrkB resulting in the strengthening of synapses,reflected by long-term ***,the association of postsynaptic density protein-95 with TrkB enhances phospholipase Cγ-Ca^(2+)/calmodulin-dependent protein kinaseⅡand phosphatidylinositol 3-kinase-mechanistic target of rapamycin signaling required for long-term *** this review,we discuss TrkB-postsynaptic density protein-95 coupling as a promising strategy to magnify brain-derived neurotrophic factor signaling towards the development of novel therapeutics for specific neurological disorders.A reduction of TrkB signaling has been observed in neurodegenerative disorders,such as Alzheimer's disease and Huntington's disease,and enhancement of postsynaptic density protein-95 association with TrkB signaling could mitigate the observed deficiency of neuronal connectivity in schizophrenia and *** with brain-derived neurotrophic factor is problematic,due to poor pharmacokinetics,low brain penetration,and side effects resulting from activation of the p75 neurotrophin receptor or the truncated TrkB.T1 *** TrkB agonists and antibodies that activate TrkB are being intensively investigated,they cannot distinguish the multiple human TrkB splicing isoforms or cell type-specific *** TrkB–postsynaptic density protein-95 coupling provides an alternative approach to specifically boost TrkB signaling at localized synaptic sites versus global stimulation that risks many adverse side effects.

关键词： Angelman syndrome autism brain-derived neurotrophic factor depression neurodegenerative disorder neurodevelopmental disorder postsynaptic density protein-95 synaptic plasticity TrkB

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：