检索结果-南通市图书馆

Full-spectrum responsive photocatalytic activity via non-noble metal bi decorated mulberry-like biVO_(4)

Journal of Materials Science & Technology 2021年第24期83卷 102-112页

作者： Yaxin bi Yanling Yang Xiao-Lei Shi Lei Feng Xiaojiang Hou Xiaohui Ye Li Zhang Guoquan Suo Siyu Lu Zhi-Gang Chen School of Materials Science and Engineering Shaanxi Key Laboratory of Green Preparation and Functionalization for Inorganic MaterialsShaanxi University of Science and TechnologyXi'an710021China Centre for Future Materials University of Southern QueenslandSpringfieldQLD4300Australia School of Mechanical and Mining Engineering The University of QueenslandBrisbaneQLD4072Australia College of Chemistry and Molecular Engineering Zhengzhou UniversityZhengzhou 450001China

Due to its appropriate bandgap(~2.4 e V)and efficient light absorption,bismuth vanadate(bi VO_(4))shows promising photocatalysis activity.However,the charge carrier recombination and poor electron transmission often induce poor photocatalytic performance.Herein,we report a new method to in-situ synthesize non-noble metal bi decorated mulberry-like bi VO_(4)by a two-step calcination process.Comprehensive characterizations reveal that non-noble metal bi nanoparticles grown in-situ on bi VO_(4)result in the red-shift of the absorbance edge,greatly extending the light absorption from the ultraviolet into the near-infrared region.The surface plasmon resonance excitation of bi nanoparticles and synergetic effects between bi and bi VO_(4)effectively improve the photocatalytic efficiency and promote the separation of photoinduced electron-hole pairs in mulberry-like bi VO_(4).Density functional theory(DFT)calculation results further verify that the electrons are transferred from bi to bi VO_(4)and the formation of·OH radical in bi/bi VO_(4)is attributed to the lower simulated free energy,which supports our experimental outcomes.This work provides a novel strategy to enhance light absorption and promote efficient solar utilization of photocatalysts for practical applications.

关键词： bi biVO_(4) Photocatalysis Full-spectrum Density functional theory

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

Automatic Anomaly Detection for Swarm Observations

引用

Journal of Geodesy and Geoinformation Science 2021年第1期4卷 94-108页

作者： Yaxin bi Vyron CHRISTODOULOU George WILKIE Guoze ZHAO Peter NICHOLL Mingjun HUANG bin HAN Ji TANG School of Computing Faculty of ComputingEngineering and the Built EnvironmentUlster UniversityNewtownabbeyBT367UK School of Architecture and the Built Environment Ulster UniversityNewtownabbeyBT367UK Institute of Geology China Earthquake AdministrationBeijing 100029China

The Swarm satellite mission was launched on 22 November 2013,it is the first European Space Agency’s constellation of three satellites,dedicated to monitoring geomagnetic field changes.The measurements delivered by the three satellites are very valuable for a range of applications,including the earthquake prediction study.However,for more than 5 years,relatively little advancement has been achieved in establishing a systematic approach for detecting anomalies from the satellite measurements for predicting earthquakes.This paper presents the challenges of developing a pragmatic framework for automatic anomaly detection and highlights innovative features of functional components developed.Through a case study we demonstrate a functionality pipeline of the system in detecting anomalies,and present our solutions to coping with data sparsity and parameter tuning as well as insights into the differences between discovering seismic anomalies from periodic and non-periodic data observed by the Swarm satellites.

关键词： anomaly detection Swarm satellites earthquake prediction study

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

Earthquake Electromagnetic Precursor Anomalies Detected by a New Ground-based Observation Network

引用

Journal of Geodesy and Geoinformation Science 2021年第1期4卷 116-123页

作者： bing HAN Guoze ZHAO Lifeng WANG Ji TANG Yaxin bi Yan ZHAN Xiaobin CHEN Qibin XIAO Jihong ZHANG The State Key Laboratory of Earthquake Dynamics.Institute of Geology China Earthquake AdministrationBeijing 100029China Computer Science Research Institute Faculty of Computing and EngineeringUniversity of UlsterBelfast BT370QBU.K. Shandong Earthquake Administration Jinan 250014China

It is a debated topic if there are any observable precursor anomalies prior to the earthquake(EQ hereafter)and if the stronger EQ can be successfully predicted.During last few decades quite a lot of observable electromagnetic(EM)precursors were published by using techniques equipped in either satellites or on ground-based stations.But there are only a few cases that the shortterm precursor anomalies of EM field before earthquakes were observed by using alternate EM fields on ground.This paper will present a new EM observation network built in recent years and show a new finding of EM field with the variation of a one-year cycle observed using the network.As an example,the short-term precursor anomalies of apparent resistivity before the Yangbi EQ(Ms 5.1)occurred on March 27,2017 in Yunnan Province will be studied.The observed anomalous phenomena indicate that the anomaly before the EQ can be captured only if reasonable effective methods including sophisticated analytical techniques are used,and it is believed that continuously observed data on the fixed observation network for a long time is an effective means for studying anomalies that appeared before earthquakes.This network can also play an important role in studying the EM environment from space.

关键词： electromagnetic observation network natural EM phenomena precursor anomaly apparent resistivity space EM environment

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

Satellite detection of IR precursors using bi-angular advanced along-track scanning radiometer data:a case study of Yushu earthquake

引用

Earthquake Science 2015年第1期28卷 25-36页

作者： Pan Xiong Xuhui Shen Xingfa Gu Qingyan Meng Yaxin bi Liming Zhao Yanhua Zhao Yan Li Jianting Dong Institute of Earthquake Science China Earthquake Administration Intitute of Remote Sensing Applications and Digital Earth Chinese Academy of Sciences School of Computing and Mathematics University of UlsterNewtownabbey Co. Beijing Institute of Space Mechanics and Electricity

The paper has developed and proposed a syn- thesis analysis method based on the robust satellite data analysis technique （RST） to detect seismic anomalies within the bi-angular advanced along-track scanning ra- diometer （AATSR） gridded brightness temperature （BT） data based on spatial/temporal continuity analysis. The proposed methods have been applied to analyze the Yushu （Qinghai, China） earthquake occurred on 14th April 2010, and a full AATSR data-set of 8 years data from March 2003 to May 2010 with longitude from 91~E to 101°E and latitude from 28°N to 38°N has been analyzed. Combining with the tectonic explanation of spatial and temporal continuity of the abnormal phenomena, the analyzed results indicate that the infrared radiation anomalies detected by the AATSR BT data with nadir view appear and enhance gradually along with the development and occurring of the earthquake, especially along the Ganzi-Yushu fault, Nu River fault and Jiali-Chayu fault; more infrared anomalies along the earthquake fault zone （Lancangjiang fault and Ning Karma Monastery-Deqin fault） are detected using the proposed synthesis analysis method, which can also characterize the activity of seismic faults more precisely.

关键词： Seismic monitoring Infrared multi-angleEarthquake infrared radiation anomalies

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

Influences of the Fresh Air Volume on the Removal of Cough-Released Droplets in a Passenger Car of a High-Speed Train Using CFD

引用

Computer Modeling in Engineering & Sciences 2024年第3期138卷 2727-2748页

作者： Jun Xu Kai bi Yibin Lu TiantianWang Hang Zhang Zeyuan Zheng Fushan Shi yaxin Zheng Xiaoying Li Jingping Yang CRRC Changchun Railway Vehicles Co. Ltd.Changchun130062China Key Laboratory of Traffic Safety on Track Ministry of EducationSchool of Traffic&Transportation EngineeringCentral South UniversityChangsha410075China College of Mechanical and Vehicle Engineering Hunan UniversityChangsha410082China

The spread and removal of pollution sources,namely,cough-released droplets in three different areas(front,middle,and rear areas)of a fully-loaded passenger car in a high-speed train under different fresh air flow volume were studied using computational fluid dynamics(CFD)method.In addition,the structure of indoor flow fields was also analysed.The results show that the large eddies are more stable and flow faster in the air supply under Mode 2(fresh air volume:2200m3/h)compared to Mode 1(fresh air volume:1100m3/h).By analysing the spreading process of droplets sprayed at different locations in the passenger car and with different particle sizes,the removal trends for droplets are found to be similar under the two air supply modes.However,when increasing the fresh air flow volume,the droplets in the middle and front areas of the passenger car are removed faster.When the droplets had dispersed for 60s,Mode 2 exhibited a removal rate approximately 1%–3%higher than Mode 1 for small and medium-sized droplets with diameters of 10 and 50μm.While those in the rear area,the situation is reversed,with Mode 1 slightly surpassing Mode 2 by 1%–3%.For large droplets with a diameter of 100μm,both modes achieved a removal rate of over 96%in all three regions at the 60 s.The results can provide guidance for air supply modes of passenger cars of high-speed trains,thus suppressing the spread of virus-carrying droplets and reducing the risk of viral infection among passengers.

关键词： Cough-released pollutants CFD ventilation inside trains supply air volume

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

Polyketides with potential bioactivities from the mangrove‑derived fungus Talaromyces sp.WHUF0362

引用

Marine Life Science & Technology 2023年第2期5卷 232-241页

作者： Huawei Lv Haibo Su yaxin Xue Jia Jia Hongkai bi Shoubao Wang Jinkun Zhang Mengdi Zhu Mahmoud Emam Hong Wang Kui Hong Xing-Nuo Li College of Pharmaceutical Science&Key Laboratory of Marine Fishery Resources Exploitment&Utilization of Zhejiang Province Zhejiang University of TechnologyHangzhou 310014China School of Pharmaceutical Sciences Wuhan UniversityWuhan 430072China Department of Pathogen biology&Jiangsu Key Laboratory of Pathogen biology Nanjing Medical UniversityNanjing 211166China Beijing Key Laboratory of Drug Target Research and New Drug Screening Institute of Materia MedicaChinese Academy of Medical SciencesBeijing 100700China Research Center of Analysis and Measurement Zhejiang University of TechnologyHangzhou 310014China Department of Phytochemistry and Plant Systematics National Research CentreGizaEgypt

Metabolites of microorganisms have long been considered as potential sources for drug discovery.In this study,fve new depsidone derivatives,talaronins A-E(1-5)and three new xanthone derivatives,talaronins F-H(6-8),together with 16 known compounds(9-24),were isolated from the ethyl acetate extract of the mangrove-derived fungus Talaromyces species WHUF0362.The structures were elucidated by analysis of spectroscopic data and chemical methods including alkaline hydrolysis and Mosher’s method.Compounds 1 and 2 each attached a dimethyl acetal group at the aromatic ring.A putative biogenetic relationship of the isolated metabolites was presented and suggested that the depsidones and the xanthones probably had the same biosynthetic precursors such as chrysophanol or rheochrysidin.The antimicrobial activity assay indicated that compounds 5,9,10,and 14 showed potent activity against Helicobacter pylori with minimum inhibitory concentration(MIC)values in the range of 2.42-36.04μmol/L.While secalonic acid D(19)demonstrated signifcant antimicrobial activity against four strains of H.pylori with MIC values in the range of 0.20 to 1.57μmol/L.Furthermore,secalonic acid D(19)exhibited cytotoxicity against cancer cell lines Bel-7402 and HCT-116 with IC_(50) values of 0.15 and 0.19μmol/L,respectively.The structure–activity relationship of depsidone derivatives revealed that the presence of the lactone ring and the hydroxyl at C-10 was crucial to the antimicrobial activity against H.pylori.The depsidone derivatives are promising leads to inhibit H.pylori and provide an avenue for further development of novel antibiotics.

关键词： Mangrove-derived fungus Talaromyces sp. Depsidone Xanthone Antimicrobial

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

Transplantation of human placental chorionic plate-derived mesenchymal stem cells for repair of neurological damage in neonatal hypoxic-ischemic encephalopathy

引用

Neural Regeneration Research 2024年第9期19卷 2027-2035页

作者： Lulu Xue Ruolan Du Ning bi Qiuxia Xiao Yifei Sun Ruize Niu yaxin Tan Li Chen Jia Liu Tinghua Wang Liulin Xiong Transformation Research Laboratory The Affiliated Hospital of Zunyi Medical UniversityZunyiGuizhou ProvinceChina State Key Laboratory of biotherapy Sichuan UniversityChengduSichuan ProvinceChina Institute of Neurological Disease Translational Neuroscience CenterWest China HospitalSichuan UniversityChengduSichuan ProvinceChina Department of Animal Zoology Institute of NeuroscienceKunming Medical UniversityKunmingYunnan ProvinceChina Department of Anesthesiology The Affiliated Hospital of Zunyi Medical UniversityZunyiGuizhou ProvinceChina Department of Pediatrics the People’s Liberation Army Rocket Force Characteristic Medical CenterBeijingChina

Neonatal hypoxic-ischemic encephalopathy is often associated with permanent cerebral palsy,neurosensory impairments,and cognitive deficits,and there is no effective treatment for complications related to hypoxic-ischemic encephalopathy.The therapeutic potential of human placental chorionic plate-derived mesenchymal stem cells for various diseases has been explored.However,the potential use of human placental chorionic plate-derived mesenchymal stem cells for the treatment of neonatal hypoxic-ischemic encephalopathy has not yet been investigated.In this study,we injected human placental chorionic plate-derived mesenchymal stem cells into the lateral ventricle of a neonatal hypoxic-ischemic encephalopathy rat model and observed significant improvements in both cognitive and motor function.Protein chip analysis showed that interleukin-3 expression was significantly elevated in neonatal hypoxic-ischemic encephalopathy model rats.Following transplantation of human placental chorionic plate-derived mesenchymal stem cells,interleukin-3 expression was downregulated.To further investigate the role of interleukin-3 in neonatal hypoxic-ischemic encephalopathy,we established an in vitro SH-SY5Y cell model of hypoxic-ischemic injury through oxygen-glucose deprivation and silenced interleukin-3 expression using small interfering RNA.We found that the activity and proliferation of SH-SY5Y cells subjected to oxygen-glucose deprivation were further suppressed by interleukin-3 knockdown.Furthermore,interleukin-3 knockout exacerbated neuronal damage and cognitive and motor function impairment in rat models of hypoxic-ischemic encephalopathy.The findings suggest that transplantation of hpcMSCs ameliorated behavioral impairments in a rat model of hypoxic-ischemic encephalopathy,and this effect was mediated by interleukin-3-dependent neurological function.

关键词： behavioral evaluations gene knockout human neuroblastoma cells(SH-SY5Y) human placental chorionic derived mesenchymal stem cells interleukin-3 neonatal hypoxic-ischemic encephalopathy nerve injury oxygen-glucose deprivation protein chip small interfering RNA

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

脱细胞支架制备及其在组织工程和再生医学中的应用

引用

中国组织工程研究 2022年第4期26卷 591-596页

作者：陈晓旭罗雅馨毕浩然杨琨遵义医科大学附属口腔医院牙周科贵州省遵义市563000

背景:用组织或器官脱细胞制成的生物支架已被成功应用于各种组织工程和再生医学。目的:综述脱细胞支架的制备方法及其在组织工程和再生医学中的作用和应用。方法:在PubMed、CNKI数据库中进行相关文献检索,以"decellularization,scaffold... 详细信息

背景:用组织或器官脱细胞制成的生物支架已被成功应用于各种组织工程和再生医学。目的:综述脱细胞支架的制备方法及其在组织工程和再生医学中的作用和应用。方法:在PubMed、CNKI数据库中进行相关文献检索,以"decellularization,scaffold,extracellular matrix,tissue regeneration and repair"为英文检索词,以"脱细胞,支架,细胞外基质,组织再生修复"为中文检索词,通过阅读题目和摘要进行初步筛选,排除与文章主题不相关的文献,最终纳入66篇文献进行结果分析。结果与结论:通过物理、化学、生物方法对组织器官进行脱细胞后获得的脱细胞支架,可有效保留细胞外基质成分,无免疫原性,具有良好的生物相容性和机械性能,可促进细胞的黏附、增殖、迁移、分化,诱导组织修复,重建血管化、功能化的组织与器官。脱细胞支架在许多组织与器官(如心脏、肝脏、肾脏、肺、气管、皮肤和骨组织)的体外实验和短期体内实验中取得了理想的效果,提示脱细胞支架在组织再生与修复中发挥重要作用,具有较好的应用前景,但要投入临床使用还需更多的深入研究和探索。

关键词：材料脱细胞支架细胞外基质组织工程再生医学综述

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

维利西呱在心力衰竭中应用进展

引用

重庆医科大学学报 2024年第4期49卷 357-361页

作者：王亚鑫黄毕郭永正罗素新重庆医科大学附属第一医院心血管内科重庆400016

心力衰竭的发生、发展涉及血管内皮功能障碍、炎症和氧化应激,这一病理生理过程会影响一氧化氮(nitric oxide,NO)-可溶性鸟苷酸环化酶(soluble guanylate cyclase,sGC)-环磷酸鸟苷-(cyclic guanosine monophosphate,cGMP)信号通路活性... 详细信息

心力衰竭的发生、发展涉及血管内皮功能障碍、炎症和氧化应激,这一病理生理过程会影响一氧化氮(nitric oxide,NO)-可溶性鸟苷酸环化酶(soluble guanylate cyclase,sGC)-环磷酸鸟苷-(cyclic guanosine monophosphate,cGMP)信号通路活性。维利西呱可通过刺激sGC提高cGMP水平,cGMP作为第二信使激活蛋白激酶、磷酸二酯酶和下游的信号通路,不仅舒张血管,改善冠状动脉血流量,而且可抑制炎症、心肌纤维化的进展,从而改善心衰患者的预后。目前维利西呱在射血分数降低的心力衰竭(heart failure with reduced ejection fraction,HFrEF)和射血分数保留的心力衰竭(heart failure with preserved ejection fraction,HFpEF)中均进行数个临床研究,其治疗心衰患者的安全性已被广泛证实,但有效性在不同类型的心衰患者有所差别。本文对心衰发生中的NO-sGC-cGMP通路的改变、维利西呱的作用机制及在心衰中的治疗进展进行综述。

关键词：心力衰竭维利西呱可溶性鸟苷酸环化酶

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

细胞支架复合体在牙周软组织增量中的特点及效果

引用

中国组织工程研究 2021年第16期25卷 2582-2588页

作者：毕浩然罗雅馨陈晓旭杨琨遵义医科大学附属口腔医院牙周科贵州省遵义市563000

背景:牙周软组织量不足带来天然牙及修复体的红白美学问题,导致牙龈炎、种植体周围炎等疾病发生。不同细胞及材料组合的细胞支架复合体可以促进牙周软组织再生,有望取代自体移植物。目的:综述自体或同种异体成纤维细胞、角质细胞、间充... 详细信息

背景:牙周软组织量不足带来天然牙及修复体的红白美学问题,导致牙龈炎、种植体周围炎等疾病发生。不同细胞及材料组合的细胞支架复合体可以促进牙周软组织再生,有望取代自体移植物。目的:综述自体或同种异体成纤维细胞、角质细胞、间充质干细胞结合支架材料应用于牙周软组织增量的研究进展及突破。方法:在PubMed、CNKI、万方、Sciencedirect、Medline数据库中进行相关文献检索,以"牙龈退缩,软组织增量,根面覆盖术,上皮下结缔组织移植物"及"gingival recession,soft tissue augmentation,root coverage,subepithelial connective graft"为关键词进行搜索,阅读摘要、结论进行初步筛选,排除与文章主题无关的研究及试验,最后纳入61篇文献进行结果分析。结果与结论:间充质干细胞在龈乳头增量方面展现出不小的潜力。单纯的成纤维细胞或角质细胞联合胶原蛋白、壳聚糖、脱细胞真皮基质等支架移植在软组织增量上未能取得预期角化龈增量,尽管两种细胞联合胶原蛋白基质表现出更为乐观的结果且当前的支架材料具有良好可塑性、生物相容性,然而成纤维细胞及角质细胞的共培养费时且成本高昂,加上支架材料的构象较为单一,如何解决这些问题仍是一段漫长的过程。

关键词：材料口腔支架牙龈退缩牙周再生医学软组织移植物组织工程学综述

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：