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8041篇 您的检索式:作者名="Zhou, K"
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1Seroepidemiology of Helicobacter pylori infection in elderly people in the Beijing region, China显示文摘AIM:To investigate seroepidemiology of cagA+and vacA+strains of Helicobacter pylori(H.pylori)in an elderly population in Beijing and to determine risk factors for seropositivity.METHODS:A total of 2006 elderly persons(>60years)were selected using a random cluster sampling method in different parts of the Beijing area(urban,suburban and mountainous districts).Structured questionnaires were completed during home visits,including history of H.pylori infection,history of gastrointestinal diseases,diet types,hygiene habits,occupation and economic status.Blood samples(2 mL)were collected from each participant,and serum IgG antibodies to cagA,vacA and H.pylori urease antigens were measured by immunodetection.RESULTS:The prevalence of H.pylori infection in elderly subjects was 83.4%and the typeⅠH.pylori strain infection rate was 56%.The seroprevalence for typeⅠH.pylori strain infection in urban and suburbandistricts was higher than that in the mountainous areas(P<0.001).Elderly subjects who had previously performed manual labor or were in the young-old age group(age<75 years)had a higher seroprevalence of H.pylori infection than those who had previously performed mental labor or were in the oldest-old age group(age≥75 year)(P<0.05).The typeⅠH.pylori strain infection rate in the elderly with vegetarian diets was higher than in those eating high-protein foods(P<0.001).There was no significant difference in the prevalence of H.pylori strains between male and female elderly participants(P>0.05).CONCLUSION:TypeⅠH.pylori seroprevalence is higher in elderly people.The distribution of strains of H.pylori is significantly affected by age,area and dietary habits.Mei Zhang Ying-Zhi Zhou Xiao-Ying Li Zhe Tang Hong-Ming Zhu Yan Yang Jagadish K Chhetri 2014World Journal of Gastroenterology2014,20,13:17
2Identification of an ideal adjuvant for receptor-binding domain-based subunit vaccines against Middle East respiratory syndrome coronavirus显示文摘Naru Zhang Rudragouda Channappanavar Cuiqing Ma Lili Wang Jian Tang Tania Garron Xinrong Tao Sumaiya Tasneem Lu Lu Chien-Te K Tseng Yusen Zhou Stanley Perlman Shibo Jiang Lanying Du 2016Cellular & Molecular Immunology2016,13,2:12
3Carbon and Strontium Isotopes of Late Palaeozoic Marine Carbonates in the Upper Yangtze Platform,Southwest China显示文摘238 marine carbonate samples were collected from seven sedimentary sections ofthe entire late Palaeozoic (Permian, Carboniferous and Devonian) in the Upper Yangtze Plat-form, southwest China. Based on the absence of cathodoluminescence and very low Mn (gener-ally<50 ppm) contents of the samples, it is thought that they contain information on the orig-inal sea water geochemistry. The results of isotopic analyses of these samples are presented interms of δ13C and 87Sr/86Sr ratios versus geological time. The strontium data, consistent withother similar data based on samples from North America, Europe, Africa and other areas inAsia, support the notion of a global consistency in strontium isotope composition of marinecarbonates. The strontium data exhibit three intervals of relatively low 87Sr/86Sr ratios in thelate Middle Devonian to early Late Devonian, Early Carboniferous and Early Permian, corre-sponding to global eustatic high sea level stands. The lowest 87Sr/86Sr ratio recorded in theLate Permian was probably caused by substantial basalt eruptions in the Upper Yangtze Plat-form at the time. Three corresponding periods of relatively high δ13C values at roughly the samethe intervals were caused by a relatively high rate of accumulation of organic carbon duringsea level rises at these times. The deposition of coal was probably responsible for the increaseof sea water δ13C at other times. The δ13C values drop dramatically near theDevonian/Carboniferous, Carboniferous/Permian and Permian/Triassic boundaries, con-sistent with other similar data, which further support the notion that geological time boundariesare associated with mass extinction and subsequent rejuvenation.Huang Sijing and Zhou Shaohua State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,Chengdu University of Technology, Chengdu, 610059, Sichuan, China Geological Institute, University of Copenhagen, Oster Voldgade 10,DK-1350 Copenhagen K,Denmark 1997Acta Geologica Sinica(English Edition)1997,71,3:11
4Bone tissue engineering via nanostructured calcium phosphate biomaterials and stem cells显示文摘Tissue engineering is promising to meet the increasing need for bone regeneration. Nanostructured calcium phosphate(CaP) biomaterials/scaffolds are of special interest as they share chemical/crystallographic similarities to inorganic components of bone. Three applications of nano-CaP are discussed in this review:nanostructured calcium phosphate cement(CPC); nano-CaP composites; and nano-CaP coatings. The interactions between stem cells and nano-CaP are highlighted, including cell attachment, orientation/morphology, differentiation and in vivo bone regeneration. Several trends can be seen:(i) nano-CaP biomaterials support stem cell attachment/proliferation and induce osteogenic differentiation, in some cases even without osteogenic supplements;(ii) the influence of nano-CaP surface patterns on cell alignment is not prominent due to non-uniform distribution of nano-crystals;(iii) nano-CaP can achieve better bone regeneration than conventional CaP biomaterials;(iv) combining stem cells with nano-CaP accelerates bone regeneration, the effect of which can be further enhanced by growth factors; and(v) cell microencapsulation in nano-CaP scaffolds is promising for bone tissue engineering. These understandings would help researchers to further uncover the underlying mechanisms and interactions in nano-CaP stem cell constructs in vitro and in vivo, tailor nano-CaP composite construct design and stem cell type selection to enhance cell function and bone regeneration, and translate laboratory findings to clinical treatments.Ping Wang Liang Zhao Jason Liu Michael D Weir Xuedong Zhou Hockin H K Xu 2014Bone Research2014,2,3:11
5柑桔黄龙病的鉴定和柯赫氏定理(英文)显示文摘黄龙(梢)病被认为是世界柑橘生产上的毁灭性病害已超过一个世纪,但该病害的病原学至今还没有清晰地建立起来。根据16S rRNA基因序列分析,一组被称为'Candidatus Liberibacter species'的难培养细菌被认为与黄龙病相关。然而,要确定'Ca.Liberibacter spp.'是黄龙病病原的柯赫氏定理并没有真正完成。令我们担忧的是,近年来有些文献频频指出'Ca.Liberibacter spp.'是黄龙病的病原,其实该细菌与柑橘寄主的直接病理反应还没有完全确定。我们建议,在黄龙病病原学清楚之前,文献报道在这方面需要有准确的阐述。Chen J Deng X Civerolo E L Lee R F Jones J B Zhou C Hartung J S Manjunath K L Brlansky R H 2011植物病理学报2011,41,2:10
6Global diversity and taxonomy of the Inonotus linteus complex(Hymenochaetales,Basidiomycota):Sanghuangporus gen.nov.,Tropicoporus excentrodendri and T.guanacastensis gen.et spp.nov.,and 17 new combinations显示文摘Although Inonotus linteus complex is placed in the genusInonotus,its perennial basidiocarps with a dimitic hyphal system,at least in the trama,distinguish the complex from other species in the genus,which have an annual habit and a monomitic hyphal system.The species number of Inonotus linteus complex has been increased in China and tropical America in recent publications.However,whether species in this complex belong to Inonotus has not specifically been addressed.To explore the phylogenetic placement of species of Inonotus linteus complex,we performed a comprehensive study using morphological and phylogenetic data based on global samples.nLSU(53 with 13 new)and ITS(70 with 18 new)datasets were used to produce the phylogenetic results.Taking into consideration the phylogenies inferred from the nLSU and ITS datasets,Inonotus is a polyphyletic genus comprising at least three clades.Clade A,the core Inonotus clade,contains the generic type,Inonotus hispidus,while Clades B and C comprise species from the Inonotus linteus complex.Morphological and phylogenetic evidence indicates that Clades B and C are new genera,and Sanghuangporus and Tropicoporus are introduced in this study.Ten species are transferred to Sanghuangporus and seven to Tropicoporus.Tropicoporus excentrodendri and T.guanacastensis spp.nov.are described,and their distinctive characters are discussed.Keys to the two new genera and the Inonotus sensu stricto,and to species of each new genus are provided.Li-Wei Zhou Josef Vlasák Cony Decock Addisu Assefa Jan Stenlid Dawit Abate Sheng-Hua Wu Yu-Cheng Dai 2016Fungal Diversity2016,,2:7
7微波辅助提取杨梅色素及抗氧化作用研究显示文摘利用响应面分析法(Response Surface Method)对杨梅色素微波辅助提取工艺进行优化,并与普通提取法进行比较。在单因素试验的基础上,根据中心组合(Box-Benhnken)实验设计原理,采用四因素三水平的响应面分析法,以色素含量为响应值进行回归分析。结果表明微波辅助提取杨梅色素的最佳工艺条件为:料液比1∶4,提取时间16 min,提取功率447 W,提取温度63℃,杨梅色素平均含量为145.07μg/mL,与模型预测值基本相符。相比普通提取法,微波辅助提取法是一种较好的杨梅色素提取方法。另外,杨梅色素具有较强的抗氧化作用。韩晓祥 应芝 励建荣 张蕾 孙金才 Zhou K 2009中国粮油学报2009,24,8:5
8Purified human bone marrow multipotent mesenchymal stem cells regenerate infarcted myocardium in experimental rats显示文摘Zhang S Jia Z Ge J Gong L Ma Y Li T Guo J Chen P Hu Q Zhang P Liu Y Li Z Ma K Li L Zhou C 2006中国生物学文摘2006,20,5:5
9Evaluation of three-dimensional biofilms on antibacterial bonding agents containing novel quaternary ammonium methacrylates显示文摘Antibacterial adhesives are promising to inhibit biofilms and secondary caries.The objectives of this study were to synthesize and incorporate quaternary ammonium methacrylates into adhesives,and investigate the alkyl chain length effects on three-dimensional biofilms adherent on adhesives for the first time.Six quaternary ammonium methacrylates with chain lengths of 3,6,9,12,16 and 18were synthesized and incorporated into Scotchbond Multi-Purpose.Streptococcus mutans bacteria were cultured on resin to form biofilms.Confocal laser scanning microscopy was used to measure biofilm thickness,live/dead volumes and live-bacteria percentage vs.distance from resin surface.Biofilm thickness was the greatest for Scotchbond control;it decreased with increasing chain length,reaching a minimum at chain length 16.Live-biofilm volume had a similar trend.Dead-biofilm volume increased with increasing chain length.The adhesive with chain length 9 had 37%live bacteria near resin surface,but close to 100%live bacteria in the biofilm top section.For chain length 16,there were nearly 0%live bacteria throughout the three-dimensional biofilm.In conclusion,strong antibacterial activity was achieved by adding quaternary ammonium into adhesive,with biofilm thickness and live-biofilm volume decreasing as chain length was increased from 3 to 16.Antibacterial adhesives typically only inhibited bacteria close to its surface;however,adhesive with chain length 16 had mostly dead bacteria in the entire three-dimensional biofilm.Antibacterial adhesive with chain length 16 is promising to inhibit biofilms at the margins and combat secondary caries.Han Zhou Michael D Weir Joseph M Antonucci Gary E Schumacher Xue-Dong Zhou Hockin H K Xu 2014International Journal of Oral Science2014,6,2:5
10MATRIEX imaging:multiarea two-photon real-time in vivo explorer显示文摘Two-photon laser scanning microscopy has been extensively applied to study in vivo neuronal activity at cellular and subcellular resolutions in mammalian brains.However,the extent of such studies is typically confined to a single functional region of the brain.Here,we demonstrate a novel technique,termed the multiarea two-photon real-time in vivo explorer(MATRIEX),that allows the user to target multiple functional brain regions distributed within a zone of up to 12mm in diameter,each with a field of view(FOV)of ~200μm in diameter,thus performing two-photon Ca2+imaging with single-cell resolution in all of the regions simultaneously.For example,we demonstrate real-time functional imaging of single-neuron activities in the primary visual cortex,primary motor cortex and hippocampal CA1 region of mice in both anesthetized and awake states.A unique advantage of the MATRIEX technique is the configuration of multiple microscopic FOVs that are distributed in three-dimensional space over macroscopic distances(>1 mm)both laterally and axially but that are imaged by a single conventional laser scanning device.In particular,the MATRIEX technique can be effectively implemented as an add-on optical module for an existing conventional single-beam-scanning two-photon microscope without requiring any modification to the microscope itself.Thus,the MATRIEX technique can be readily applied to substantially facilitate the exploration of multiarea neuronal activity in vivo for studies of brain-wide neural circuit function with single-cell resolution.Mengke Yang Zhenqiao Zhou Jianxiong Zhang Shanshan Jia Tong Li Jiangheng Guan Xiang Liao Bing Leng Jing Lyu Kuan Zhang Min Li Yan Gong Zhiming Zhu Junan Yan Yi Zhou Jian K Liu Zsuzsanna Varga Arthur Konnerth Yuguo Tang Jinsong Gao Xiaowei Chen Hongbo Jia 2019Light(Science & Applications)2019,8,1:4
11Overall optimization of Rankine cycle system for waste heat recovery of heavy-duty vehicle diesel engines considering the cooling power consumption显示文摘The Rankine cycle system for waste heat recovery of heavy-duty vehicle diesel engines has been regarded as a promising technique to reduce fuel consumption. Its heat dissipation in the condensation process, however, should be taken away in time, which is an energy-consuming process. A fan-assisted auxiliary water-cooling system is employed in this paper. Results at 1300 r/min and 50% load indicate that the cooling pump and cooling fan together consume 7.66% of the recovered power. What's worse for the heavy load, cooling accessories may deplete of all the recovered power of the Rankine cycle system. Afterwards, effects of the condensing pressure and water feeding temperature are investigated, based on which a cooling power consumption model is established. Finally, an overall efficiency optimization is conducted to balance the electric power generation and cooling power consumption, taking condensing pressure, pressure ratio and exhaust bypass valve as major variables. The research suggests that the priority is to increase condensing pressure and open exhaust bypass valve appropriately at high speed and heavy load to reduce the cooling power consumption, while at low speed and light load, a lower condensing pressure is favored and the exhaust bypass valve should be closed making the waste heat recovered as much as possible. Within the sub-critical region, a larger pressure ratio yields higher overall efficiency improvement at medium-low speed and load. But the effects taper off at high speed and heavy load. For a given vehicular heavy-duty diesel engine, the overall efficiency can be improved by 3.37% at 1300 r/min and 25% load using a Rankine cycle system to recover exhaust energy. The improvement becomes smaller as engine speed and load become higher.YANG Can XIE Hui ZHOU Sheng K 2016Science China(Technological Sciences)2016,59,2:4
12Biomimetic Study on Helical Fiber Composites显示文摘The innovative approach imparting strength and toughness to carbon fiber reinforced polymer composites (CFRP) is put fotward from the viewpoint of biomimetics. Helical fibers produced by twisting fiber bundle are arranged in the matrix to simulate the unique structure of natural fibers.The results on the CFRP with helical fiber bundles show that, under the same state of strong fiber/matrix interface, the impact fracture toughness can be improved substantially compared to conventional composites with plain fibers. The beneficial effect is attributed to the helical fiber bundles which act as single fibers of huge diameter effectively increasing the fIber eIastic energy.Zhang, K Wang, YQ Zhou, BL 1998Journal of Materials Science & Technology1998,14,1:4
13Phylogeny and taxonomy of the Inonotus linteus complex显示文摘The Inonotus linteus complex comprises several closely related species characterized by pileate basidiomes,a heterogeneous hyphal system with a monomitic context and a dimitic hymenophoral trama.Setae are hymenial and basidiospores are broadly ellipsoid to subglobose,yellowish and thick-walled.Research to understand this complex have been particularly noticeable in East Asia.In the present paper,the complex was studied at a larger scale,including samples from Mesoamerica.Inonotus linteus,an epitype of this species being designated here,is circumscribed as a narrow sense based on morphological and phylogenetic data,and this has lead to delimiting a new species from Mesoamerica,viz.I.cubensis,and provides evidence for two additional species,I.alpinus and I.zonatus,from East Asia.Phylogenetic analyses of ITS sequences also confirmed the status of I.baumii,I.linteus,I.lonicericola,I.lonicerinus,I.vaninii,I.sanghuang,I.weigelae and I.weirianus as distinct taxa,while I.tenuicontextus is considered to be a synonym of I.weigelae.A key to 11 species in the complex is provided.Xue-Mei Tian Hai-You Yu Li-Wei Zhou Cony Decock Josef Vlasák Yu-Cheng Dai 2013Fungal Diversity2013,,1:4
14Rising challenge of multidrug-resistant tuberculosis in China:a predictive study using Markov modeling显示文摘Background:Multidrug-resistant tuberculosis(MDR-TB)is on the rise in China.This study used a dynamic Markov model to predict the longitudinal trends of MDR-TB in China by 2050 and to assess the effects of alternative control measures.Methods:Eight states of tuberculosis transmission were set up in the Markov model using a hypothetical cohort of 100000 people.The prevalence of MDR-TB and bacteriologically confirmed drug-susceptible tuberculosis(DS-TB+)were simulated and MDR-TB was stratified into whether the disease was treated with the recommended regimen or not.Results:Without any intervention changes to current conditions,the prevalence of DS-TB+was projected to decline 67.7%by 2050,decreasing to 20 per 100000 people,whereas that of MDR-TB was expected to triple to 58/100000.Furthermore,86.2%of the MDR-TB cases would be left untreated by the year of 2050.In the case where MDR-TB detection rate reaches 50%or 70%at 5%per year,the decline in prevalence of MDR-TB would be 25.9 and 36.2%respectively.In the case where treatment coverage was improved to 70%or 100%at 5%per year,MDR-TB prevalence in 2050 would decrease by 13.8 and 24.1%,respectively.If both detection rate and treatment coverage reach 70%,the prevalence of MDR-TB by 2050 would be reduced to 28/100000 by a 51.7%reduction.Conclusions:MDR-TB,especially untreated MDR-TB,would rise rapidly under China’s current MDR-TB control strategies.Interventions designed to promote effective detection and treatment of MDR-TB are imperative in the fights against MDR-TB epidemics.Bing-Ying Li Wen-Pei Shi Chang-Ming Zhou Qi Zhao Vinod K Diwan Xu-Bin Zheng Yang Li Sven Hoffner Biao Xu 2020Infectious Diseases of Poverty2020,9,3:3
15利钠肽受体2的缺乏促进小鼠二叶主动脉瓣、主动脉瓣疾病、左心室功能不全以及升主动脉扩张显示文摘主动脉瓣疾病是无有效药物治疗的细胞介导的病变过程。C型利钠肽(C-type natriuretic peptide,CNP)抑制瓣膜间质细胞(valve interstitial cells,VIC)的肌纤维形成和成骨过程,并且在出现主动脉瓣狭窄时水平下调。然而,CNP信号是否调节体内主动脉瓣的健康状态尚不清楚。该研究旨在确定小鼠CNP信号通路的缺失是否导致主动脉瓣疾病加速发展。刘青 叶鹏 Blaser MC Wei K Adams RL Zhou YQ Caruso LL Mirzaei Z Lam A Tam RK Zhang H Heximer SP Henkelman M Simmons CA 2018中华高血压杂志2018,26,1:3
16Integrated U-Pb,Lu-Hf and(U-Th)/He analysis of zircon from the Banxi Sb deposit and its implications for the low-temperature mineralization in South China显示文摘Low-temperature Sb(Au-Hg) deposits in South China account for more than 50% of the world’s Sb reserves,however,their genesis remains controversial.Here we report the first study that integrates U-Pb and Lu-Hf analysis by LA-(MC)-ICPMS and conventional(U-Th)/He analysis,all applied to single zircon crystals,in an attempt to constrain the origin and timing of world-class Sb(Au-Hg) deposits in Banxi(South China).Zircon separated from a quartz-stibnite ore and an altered country rock samples revealed similar U-Pb age spectra defining two major populations-Paleoproterozoic(~1900-2500 Ma) and Neoproterozoic(~770 Ma),which are characterized by variable εHf(t) values(-10.7 to 9.1 and-16.5 to 11.2,respectively) and Hf crustal model ages(TDMC)(2.48 to 3.24 Ga and 0.97 to 2.71 Ga,respectively).The U-Pb age and Hf isotopic features of the zircons are consistent with the Banxi Group in the region,indicating that the zircons involved in the low-temperature hydrothermal system were originally from the Banxi Group country rocks.Thirty-three mineralization-related zircon crystals yielded a mean(U-Th)/He age of 123.8±3.8 Ma,which is interpreted to represent the timing of the latest low-temperature mineralization stage of the Banxi Sb deposit.The combined U-Pb,Lu-Hf and(U-Th)/He data suggest that Precambrian basement rocks were the major contributors to the low-temperature mineralization,and that Early Cretaceous(130-120 Ma) could be the most important ore-forming epoch for the Sb deposits in South China.This study also demonstrates the analytical feasibility of integrated U-Pb-Lu-Hf-(U-Th)/He 'triple-dating',all applied to single zircon crystals.This approach reveals the full evolution of zircon,from its origin of the magmatic source,through its crystallization and low-temperature cooling.Although this study demonstrates the usefulness of this integrated approach in dating low-temperature mineralization,it has great potential for zircon provenance and other studies that may benefit from the large amount of information that can be extracted from single zircon crystals.Huan Li Martin Danisík Zhe-Kai Zhou Wei-Cheng Jiang Jing-Hua Wu 2020Geoscience Frontiers2020,11,4:3
17Projection of the Zhujiang(Pearl) River Delta's potential submerged area due to sea level rise during the 21st century based on CMIP5 simulations显示文摘Projections of potential submerged area due to sea level rise are helpful for improving understanding of the influence of ongoing global warming on coastal areas. The Ensemble Empirical Mode Decomposition method is used to adaptively decompose the sea level time series in order to extract the secular trend component. Then the linear relationship between the global mean sea level(GMSL) change and the Zhujiang(Pearl) River Delta(PRD)sea level change is calculated: an increase of 1.0 m in the GMSL corresponds to a 1.3 m(uncertainty interval from1.25 to 1.46 m) increase in the PRD. Based on this relationship and the GMSL rise projected by the Coupled Model Intercomparison Project Phase 5 under three greenhouse gas emission scenarios(representative concentration pathways, or RCPs, from low to high emission scenarios RCP2.6, RCP4.5, and RCP8.5), the PRD sea level is calculated and projected for the period 2006–2100. By around the year 2050, the PRD sea level will rise 0.29(0.21 to 0.40) m under RCP2.6, 0.31(0.22 to 0.42) m under RCP4.5, and 0.34(0.25 to 0.46) m under RCP8.5, respectively.By 2100, it will rise 0.59(0.36 to 0.88) m, 0.71(0.47 to 1.02) m, and 1.0(0.68 to 1.41) m, respectively. In addition,considering the extreme value of relative sea level due to land subsidence(i.e., 0.20 m) and that obtained from intermonthly variability(i.e., 0.33 m), the PRD sea level will rise 1.94 m by the year 2100 under the RCP8.5scenario with the upper uncertainty level(i.e., 1.41 m). Accordingly, the potential submerged area is 8.57×103 km2 for the PRD, about 1.3 times its present area.XIA Jiangjiang YAN Zhongwei ZHOU Wen FONG Soi Kun LEONG Ka Cheng TANG Iu Man CHANG S W LEONG W K JIN Shaofei 2015Acta Oceanologica Sinica2015,34,9:3
18Endoscopic ultrasound-guided fine-needle aspiration for the diagnosis of pancreatic cysts by combined cytopathology and cystic content analysis显示文摘Recent advances in imaging technology have resulted in an increase in incidental discoveries of pancreatic cystic lesions. Pancreatic cysts comprise a wide variety of lesions and include non-neoplastic cysts and neoplastic cysts. Because some pancreatic cysts have more of a malignant potential than others, it is absolutely essential that an accurate diagnosis is rendered so that effective care can be given to each patient. In many centers, endoscopic ultrasound(EUS)-guided fine-needle aspiration(FNA) has emerged as the modality of choice that enables one to distinguish between mucinous and non-mucinous lesion, diagnose malignancy and collect cyst fluid for further diagnostic studies, such as pancreatic enzyme levels, molecular analysis and other tumor biomarkers. The current review will focus on EUSguided FNA and the cytological diagnosis for pancreatic cysts.Amanda K Martin Zhongren Zhou 2015World Journal of Gastrointestinal Endoscopy2015,7,15:3
19The novel zinc finger-containing transcription factor osterix is required for osteroblast differentiation and bone formation显示文摘Kazuhisa N Xin Zhou Gary K 2002Cell2002,108,1:2
20Fluorescence and SEM correlative microscopy for nanomanipulation of subcellular structures显示文摘Nanomanipulation under scanning electron microscopy(SEM)enables direct interactions of a tool with a sample.We recently developed a nanomanipulation technique for the extraction and identification of DNA contained within sub-nuclear locations of a single cell nucleus.In nanomanipulation of sub-cellular structures,a key step is to identify targets of interest through correlating fluorescence and SEM images.The DNA extraction task must be conducted with low accelerating voltages resulting in low imaging resolutions.This is imposed by the necessity of preserving the biochemical integrity of the sample.Such poor imaging conditions make the identification of nanometer-sized fiducial marks difficult.This paper presents an affine scale-invariant feature transform(ASIFT)based method for correlating SEM images and fluorescence microscopy images.The performance of the image correlation approach under different noise levels and imaging magnifications was quantitatively evaluated.The optimal mean absolute error(MAE)of correlation results is 68634 nm under standard conditions.Compared with manual correlation by skilled operators,the automated correlation approach demonstrates a speed that is higher by an order of magnitude.With the SEM-fluorescence image correlation approach,targeted DNA was successfully extracted via nanomanipulation under SEM conditions.Zheng Gong Brandon K Chen Jun Liu Chao Zhou Dave Anchel Xiao Li Ji Ge David P Bazett-Jones Yu Sun 2014Light(Science & Applications)2014,3,1:2
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