检索结果-南通市图书馆

Military Medical Research 2025年第1期12卷 36-47页

作者： Tao-Hu Zhou Xiu-Xiu Zhou Jiong Ni Yan-Qing Ma Fang-Yi Xu Bing Fan Yu Guan Xin-Ang jiang Xiao-Qing Lin Jie Li Yi Xia Xiang Wang Yun Wang wen-Jun Huang wen-Ting Tu Peng Dong Zhao-Bin Li Shi-Yuan Liu Li Fan Department of Radiology the Second Affiliated Hospital of Naval Medical UniversityShanghai 200003China School of Medical Imaging Shandong Second Medical UniversityWeifang 261053ShandongChina Department of Radiology School of MedicineTongji HospitalTongji UniversityShanghai 200065China Department of Radiology Zhejiang Province People’s HospitalAffiliated People’s Hospital of Hangzhou Medical CollegeHangzhou 310014China Department of Radiology Sir Run Run Shaw HospitalZhejiang 310018China jiangxi Provincial People’s Hospital the First Affiliated Hospital of Nanchang Medical CollegeNanchang 330006China College of Health Sciences and Engineering University of Shanghai for Science and TechnologyShanghai 200093China Department of Radiology the Second People’s Hospital of DeyangDeyang 618000SichuanChina Department of Radiation Oncology Shanghai Jiao Tong University Affiliated Sixth People’s HospitalShanghai 200233China

Background:Computed tomography(CT)plays a great role in characterizing and quantifying changes in lung structure and function of chronic obstructive pulmonary disease(COPD).This study aimed to explore the performance of CT-based whole lung radiomic in discriminating COPD patients and non-COPD ***:This retrospective study was performed on 2785 patients who underwent pulmonary function examination in 5 hospitals and were divided into non-COPD group and COPD *** radiomic features of the whole lung volume were *** absolute shrinkage and selection operator(LASSO)logistic regression was applied for feature selection and radiomic signature construction.A radiomic nomogram was established by combining the radiomic score and clinical *** operating characteristic(ROC)curve analysis and decision curve analysis(DCA)were used to evaluate the predictive performance of the radiomic nomogram in the training,internal validation,and independent external validation ***:Eighteen radiomic features were collected from the whole lung volume to construct a radiomic *** area under the curve(AUC)of the radiomic model in the training,internal,and independent external validation cohorts were 0.888[95%confidence interval(CI)0.869–0.906],0.874(95%CI 0.844–0.904),and 0.846(95%CI 0.822–0.870),*** were higher than the clinical model(AUC were 0.732,0.714,and 0.777,respectively,P<0.001).DCA demonstrated that the nomogram constructed by combining radiomic score,age,sex,height,and smoking status was superior to the clinical factor ***:The intuitive nomogram constructed by CT-based whole-lung radiomic has shown good performance and high accuracy in identifying COPD in this multicenter study.

关键词： Chronic obstructive pulmonary disease(COPD) Computed tomography(CT) Radiomic

维普期刊数据库

Effect of lamellarization on the microstructure and mechanical properties of marine 10Ni5CrMoV steel

在线全文

学校读者我要写书评

暂无评论

International Journal of Minerals,Metallurgy and Materials 2025年第2期32卷 402-413页

作者： Tao Zou Yanwu Dong Zhouhua jiang Shuyang Du Yushuo Li School of Metallurgy Northeastern UniversityShenyang 110819China Key Laboratory of Rolling and Automation Northeastern UniversityShenyang 110819China Key Laboratory for Ecological Metallurgy of Multimetallic Ores(Ministry of Education) Northeastern UniversityShenyang 110819China

Multistage heat treatment involving quenching(Q),lamellarizing(L),and tempering(T)is applied to marine 10Ni5CrMoV *** microstructure and mechanical properties were studied by multiscale characterizations,and the kinetics of reverse austenite transformation,strain hardening behavior,and toughening mechanism were further *** lamellarized specimens possess low yield strength but high toughness,especially cryogenic *** leads to the development of film-like reversed austenite at the martensite block and lath boundaries,refining the martensite structure and lowering the equivalent grain *** analysis of austenite reversion based on the JMAK model shows that the isothermal transformation is dominated by the growth of reversed austenite,and the maximum transformation of reversed austenite is reached at the peak temperature(750℃).The strain hardening behavior based on the modified Crussard-Jaoul analysis indicates that the reversed austenite obtained from lamellarization reduces the proportion of martensite,significantly hindering crack propagation via martensitic transformation during the *** a consequence,the QLT specimens exhibit high machinability and low yield *** with the QT specimen,the ductile-brittle transition temperature of the QLT specimens decreases from-116 to-130℃due to the low equivalent grain size and reversed austenite,which increases the cleavage force required for crack propagation and absorbs the energy of external load,*** work provides an idea to improve the cryogenic toughness of marine 10Ni5CrMoV steel and lays a theoretical foundation for its industrial application and comprehensive performance improvement.

关键词： 10Ni5CrMoV steel lamellarizing reversed austenite cryogenic toughness ductile-brittle transition temperature

维普期刊数据库

Exploring the diversity of dissolved organic matter(DOM)properties and sources in different functional areas of a typical macrophyte-derived lake combined with optical spectroscopy and FT-ICR MS analysis

在线全文

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2025年第1期147卷 462-473页

作者： Kun Wang Haoyu Ren Shengwu Yuan Xia jiang Pengfei Wang College of Water Sciences Beijing Normal UniversityBeijing 100875China National Engineering Laboratory of Lake Pollution Control and Ecological Restoration Chinese Research Academy of Environmental SciencesBeijing 100012China

Lake Baiyangdian is one of China’s largest macrophyte-derived lakes,facing severe challenges related to water quality maintenance and eutrophication *** organic matter(DOM)was a huge carbon pool and its abundance,property,and transformation played important roles in the biogeochemical cycle and energy flow in lake *** this study,Lake Baiyangdian was divided into four distinct areas:Unartificial Area(UA),Village Area(VA),Tourism Area(TA),and Breeding Area(BA).We examined the diversity of DOM properties and sources across these functional *** findings reveal that DOM in this lake is predominantly composed of protein-like substances,as determined by excitation-emission matrix and parallel factor analysis(EEM-PARAFAC).Notably,the exogenous tyrosine-like component C1 showed a stronger presence in VA and BA compared to UA and ***-resolution mass spectrometry(FT-ICR MS)unveiled a similar DOM molecular composition pattern across different functional areas due to the high relative abundances of lignan compounds,suggesting that macrophytes significantly influence the material structure of *** properties exhibited specific associations with water quality indicators in various functional areas,as indicated by the Mantel *** connections between DOM properties and NO_(3)-N andNH3-Nwere more pronounced in VA and BA than in UA and *** results underscore the viability of using DOM as an indicator for more precise and scientific water quality management.

关键词： Dissolved organic matter Fluorescence property Molecular composition Source

Mechanism of extracellular electron transport and reactive oxygen mediated Sb(Ⅲ)oxidation by Klebsiella aerogenes HC10

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

Journal of Environmental Sciences 2025年第1期147卷 11-21页

作者： Qun Rong Chaolan Zhang Caiyuan Ling Dingtian Lu Linjiang jiang College of Resources Environment and Materials Guangxi UniversityNanning 530004China School of Environment and Life Science Nanning Normal UniversityNanning 530001China

Microbial oxidation and the mechanism of Sb(Ⅲ)are key governing elements in biogeochemical cycling.A novel Sb oxidizing bacterium,Klebsiella aerogenes HC10,was attracted early and revealed that extracellular metabolites were the main fractions driving Sb ***,linkages between the extracellular metabolite driven Sb oxidation process and mechanism remain ***,model phenolic and quinone compounds,i.e.,anthraquinone-2,6-disulfonate(AQDS)and hydroquinone(HYD),representing extracellular oxidants secreted by *** HC10,were chosen to further study the Sb(Ⅲ)oxidation mechanism.N_(2)purging and free radical quenching showed that oxygen-induced oxidation accounted for 36.78%of Sb(Ⅲ)in the metabolite reaction system,while hydroxyl free radicals(·OH)accounted for 15.52%.·OH and H_(2)O_(2)are the main driving factors for Sb *** quenching,methanol purification and electron paramagnetic resonance(EPR)analysis revealed that·OH,superoxide radical(O_(2)^(•-))and semiquinone(SQ-•)were reactive intermediates of the phenolic induced oxidation ***-induced ROS are one of the main oxidants in *** voltammetry(CV)showed that electron transfer of quinone also mediated Sb(Ⅲ)*** of Sb(V)was scavenged by the formation of the secondary Sb(V)-bearing mineral mopungite[NaSb(OH)6]in the incubation *** study demonstrates the microbial role of oxidation detoxification and mineralization of Sb and provides scientific references for the biochemical remediation of Sb-contaminated soil.

关键词： Antimonite oxidation Active oxygen Free radical Electron transfer AQDS

Cocrystals of axially N-embedded quasi-carbon nanohoops via modulating the electron affinity of guest acceptors

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

Science China Chemistry 2025年

作者： Li Zhang Shuhai Qiu Shunlong Hu Hanren Xu Xuwen Sun wei jiang Da-Hui Qu Zhaohui Wang Key Laboratory for Advanced Materials and Joint International Research Laboratory of Precision Chemistry and Molecular Engineering Feringa Nobel Prize Scientist Joint Research Center Frontiers Science Center for Materi-obiology and Dynamic Chemistry Institute of Fine Chemicals School of Chemistry and Molecular Engineering East China University of Science and Technology Key Laboratory of Organic Optoelectronics and Molecular Engineering Department of Chemistry Tsinghua University

Organic donor-acceptor cocrystals of π-conjugated molecues have shown diverse applications in materials science. However,most cocrystals exist in neutral forms dominated by π-π interactions, while the ionic congeners and corresponding properties are rarely studied due to difficulties in harnessing the degree of charge transfer. Herein, we report cocrystals of axially N-embedded quasi-carbon nanohoops(DPP-D and DPP-T) with electron deficient guests. By modulating the electron affinity of the acceptor guests, the electronic structures of the complexes can be tuned from neutral to ionic states. Specifically, DPP-D interacts with TCNB molecules to form neutral superstructures via intermolecular π-π interactions, giving rise to a deep-red emission in the solid state. In contrast, an ionic complex showing near-infrared region absorptions and paramagnetic character on account of strong charge-transfer interactions is generated when DDQ molecules are involved. Their unique properties can be explained by different degrees of charge transfer and assembly modes, which have clearly been manifested by crystal structures and theoretical calculations. Our studies provide rare examples of π-conjugated macrocycle-based donor-acceptor cocrystals in both neutral and ionic forms, and give insight to the design of multicomponent carbon nanomaterials.

关键词：

Cohort study on the treatment of BRAF V600E mutant metastatic colorectal cancer with integrated Chinese and western medicine

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

World Journal of Clinical Oncology 2025年第1期16卷 25-33页

作者： jiang-Yu Bian Yu-Fang Feng wen-Ting He Tong Zhang Department of Oncology Xiyuan Hospital of China Academy of Chinese Medical SciencesBeijing 100091China Department of Oncology The Fourth Clinical Medical College of Xinjiang Medical UniversityUrumqi 830001China Department of Oncology Traditional Chinese Medicine Hospital Affiliated to Xinjiang Medical UniversityUrumqi 830001China

BACKGROUND Patients with BRAF V600E mutant metastatic colorectal cancer(mCRC)have a low incidence rate,poor biological activity,suboptimal response to conventional treatments,and a poor *** the previous cohort study on mCRC conducted by our team,it was observed that integrated Chinese and Western medicine treatment could significantly prolong the overall survival(OS)of patients with colorectal ***,we further explored the survival benefits in the population with BRAF V600E mutant *** To evaluate the efficacy of integrated Chinese and Western medicine in the treatment of BRAF V600E mutant metastatic colorectal *** A cohort study was conducted on patients with BRAF V600E mutant metastatic colorectal cancer admitted to Xiyuan Hospital of China Academy of Chinese Medical Sciences and Traditional Chinese Medicine Hospital of Xinjiang Uygur Autonomous Region from January 2016 to December *** patients were divided into two *** A total of 34 cases were included,with 23 in Chinese-Western medicine cohort(cohort A)and 11 in Western medicine cohort(cohort B).The median overall survival was 19.9 months in cohort A and 14.2 months in cohort B,with a statistically significant difference(P=0.038,hazard ratio=0.46).The 1-3-year survival rates were 95.65%(22/23),39.13%(9/23),and 26.09%(6/23)in cohort A,and 63.64%(7/11),18.18%(2/11),and 9.09%(1/11)in cohort B,*** analysis showed statistically significant differences in median OS between the two cohorts in the right colon,liver metastasis,chemotherapy,and first-line treatment subgroups(P<0.05).CONCLUSION Integrated Chinese and Western medicine can prolong the survival and reduce the risk of death in patients with BRAF V600E mutant metastatic colorectal cancer,with more pronounced benefits observed in patients with right colon involvement,liver metastasis,combined chemotherapy,and first-line treatment.

关键词： Metastatic colorectal cancer BRAF V600E mutation Integrated Chinese and Western medicine Cohort study

Ultralow Ohmic Contact in Recess-Free Ultrathin Barrier AlGaN/GaN Heterostructures Across a Wide Temperature Range

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

Chinese Journal of Electronics 2025年第1期34卷 137-145页

作者： Yuhao Wang Sen Huang Qimeng jiang Xinhua Wang Jie Fan Haibo Yin Ke wei Yingkui Zheng Xinyu Liu Key Laboratory of Microelectronic Devices & Integrated Technology Institute of Microelectronics of the Chinese Academy of Sciences Institute of Microelectronics University of Chinese Academy of Sciences

“Ohmic-before-passivation” process was implemented on ultrathin-barrier AlGaN（<6 nm）/GaN heterostructure to further reduce the ohmic contact resistance（Rc）. In this process, alloyed Ti/Al/Ni/Au ohmic metal was formed first, followed by AlN/SiNxpassivation contributed to restore two-dimensional electron gas（2DEG） in the access region. Due to the sharp change in the concentration of 2DEG at the metal edge, a reduced transfer length consisted with lower Rcare achieved compared to that of ohmic contact on AlGaN（～20 nm）/GaN heterostructure with pre-ohmic recess process. Temperature-dependent current voltage measurements demonstrate that the carrier transport mechanism is dominated by thermionic field emission above 200 K and by field emission below 200 K. The “ohmic-before-passivation” process enables the relative stability of ohmic contacts between 50 K and 475 K and significantly improves the direct current characteristics of GaN-metal-insulator-semiconductor-high electron mobility transistor, offering a promising means for scaling down and enabling the utilization of low-voltage GaN-based power devices in extreme environmental conditions.

关键词： Resistance Low voltage Thermionic emission HEMTs Ohmic contacts Wide band gap semiconductors Transistors MODFETs Aluminum gallium nitride Thermal stability

页岩纳米孔隙分形特征及其对甲烷吸附性能的影响

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

科学技术与工程 2017年第2期17卷 31-39页

作者：陈磊姜振学温暖高凤琳王朋飞纪文明姜伟佳中国石油大学(北京)油气资源与探测国家重点实验室北京102249 中国石油大学(北京)非常规天然气研究院北京102249 中国石油大学(北京)非常规油气协同创新中心北京102249

为了更好地了解页岩纳米孔隙特征及其对甲烷吸附性能的影响,对四川盆地上三叠统须五段的6个页岩样品进行了分形分析。通过对氮气吸附/解吸等温线的分析表明,页岩在相对压力为0~0.5和0.5~1时具有不同的吸附特征。利用Frenkel-Halsey-Hill... 详细信息

为了更好地了解页岩纳米孔隙特征及其对甲烷吸附性能的影响,对四川盆地上三叠统须五段的6个页岩样品进行了分形分析。通过对氮气吸附/解吸等温线的分析表明,页岩在相对压力为0~0.5和0.5~1时具有不同的吸附特征。利用Frenkel-Halsey-Hill(FHH)方程计算得到两个分形维数D_1和D_2。甲烷的吸附性能随着D_1和D_2的增加而增强,其中D_1对吸附有着更显著的影响。进一步研究表明,D_1代表由于页岩表面不规则性产生的孔隙表面分形特征;而D_2代表的是孔隙结构分形特征,其主要受页岩组分(有机碳含量、石英、黏土矿物等)和孔隙参数(平均孔径、微孔含量等)控制。更高的分形维数D_1对应更不规则的孔隙表面,为甲烷吸附提供更多的空间。而更高的分形维数D_2代表更复杂的孔隙结构以及孔隙表面更强烈的毛细凝聚作用,进而增强甲烷的吸附能力。因此,页岩孔隙表面越不规则,孔隙结构越复杂,甲烷吸附能力越强。

关键词：页岩气分形维数吸附性能氮气吸附四川盆地

维普期刊数据库

Constructing 2D bismuth-based heterostructure for highly efficient photocatalytic CO2 reduction

在线全文

学校读者我要写书评

暂无评论

Tungsten 2025年第1期7卷 71-79页

作者： Ruo-Hang Xu Hao-Yu jiang Dan-Dan Cui Kun-Rong Du Hong-Run Zhang Sheng-Jie Xu Ya-Qi Li Zhi-Zhen Ren Liang Wang wei-Chang Hao Yi Du School of Physics and BUAA-UOW Joint Research Centre Beihang University Shenzhen Institute of Beihang University Centre for Catalysis and Clean Energy School of Environment and Science Griffith University

Reforming carbon dioxide（CO2） into fuels and valuable chemicals using solar energy holds significant potential for emission reduction and addressing energy supply *** recombination of photocarriers remains a major obstacle,however,to enhancing solar energy conversion efficiency in the photocatalytic reaction *** two-dimensional materials,constructing heterogeneous structures has emerged as an effective strategy to enhance the separation of photoexcited carriers by leveraging the internal electric field at the heterogeneous ***,we present a facile strategy for preparing Bi4NbO8Br/Bi2WO6plate-on-plate Z-scheme junctions with a strong internal electric field by in situ *** unique heterostructure facilitates efficient separation and transport of photoexcited charges by harnessing the internal electric field induced by chemical bonding at the lateral ***,the Bi4NbO8Br/Bi2WO6heterostructure exhibits enhanced CO2photoreduction properties,along with a CO yield rate of approximately 35 μmol·g-1·h-1under full light *** work offers novel insights into the synthesis of unique hetero structures intended to enhance the efficiency of photocatalytic CO2reduction.

关键词： Bi4NbO8Br/Bi2WO6 CO2 reduction Heterostructures Photocatalysts