Journal of microscopy最新文献

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Setting up a light microscopy core facility: Facility design 建立光学显微镜核心设施:设施设计。
IF 2 4区 工程技术
Journal of microscopy Pub Date : 2024-05-08 DOI: 10.1111/jmi.13301
Timo Zimmermann
{"title":"Setting up a light microscopy core facility: Facility design","authors":"Timo Zimmermann","doi":"10.1111/jmi.13301","DOIUrl":"10.1111/jmi.13301","url":null,"abstract":"<p>The successful operation of a light microscopy core facility depends also on the initial setup of its infrastructure. This article covers the aspects of location selection and room planning and what environmental factors need to be considered. These include light, temperature, vibrations as well as the basic installations needed for microscope operation.</p>","PeriodicalId":16484,"journal":{"name":"Journal of microscopy","volume":"294 3","pages":"255-267"},"PeriodicalIF":2.0,"publicationDate":"2024-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jmi.13301","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140891946","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
High-speed 4-dimensional scanning transmission electron microscopy using compressive sensing techniques 使用压缩传感技术的高速四维扫描透射电子显微镜。
IF 1.5 4区 工程技术
Journal of microscopy Pub Date : 2024-05-06 DOI: 10.1111/jmi.13315
Alex W. Robinson, Amirafshar Moshtaghpour, Jack Wells, Daniel Nicholls, Miaofang Chi, Ian MacLaren, Angus I. Kirkland, Nigel D. Browning
{"title":"High-speed 4-dimensional scanning transmission electron microscopy using compressive sensing techniques","authors":"Alex W. Robinson,&nbsp;Amirafshar Moshtaghpour,&nbsp;Jack Wells,&nbsp;Daniel Nicholls,&nbsp;Miaofang Chi,&nbsp;Ian MacLaren,&nbsp;Angus I. Kirkland,&nbsp;Nigel D. Browning","doi":"10.1111/jmi.13315","DOIUrl":"10.1111/jmi.13315","url":null,"abstract":"<p>Here we show that compressive sensing allows 4-dimensional (4-D) STEM data to be obtained and accurately reconstructed with both high-speed and reduced electron fluence. The methodology needed to achieve these results compared to conventional 4-D approaches requires only that a random subset of probe locations is acquired from the typical regular scanning grid, which immediately generates both higher speed and the lower fluence experimentally. We also consider downsampling of the detector, showing that oversampling is inherent within convergent beam electron diffraction (CBED) patterns and that detector downsampling does not reduce precision but allows faster experimental data acquisition. Analysis of an experimental atomic resolution yttrium silicide dataset shows that it is possible to recover over 25 dB peak signal-to-noise ratio in the recovered phase using 0.3% of the total data.</p><p><b>Lay abstract</b>: Four-dimensional scanning transmission electron microscopy (4-D STEM) is a powerful technique for characterizing complex nanoscale structures. In this method, a convergent beam electron diffraction pattern (CBED) is acquired at each probe location during the scan of the sample. This means that a 2-dimensional signal is acquired at each 2-D probe location, equating to a 4-D dataset.</p><p>Despite the recent development of fast direct electron detectors, some capable of 100kHz frame rates, the limiting factor for 4-D STEM is acquisition times in the majority of cases, where cameras will typically operate on the order of 2kHz. This means that a raster scan containing 256^2 probe locations can take on the order of 30s, approximately 100-1000 times longer than a conventional STEM imaging technique using monolithic radial detectors. As a result, 4-D STEM acquisitions can be subject to adverse effects such as drift, beam damage, and sample contamination.</p><p>Recent advances in computational imaging techniques for STEM have allowed for faster acquisition speeds by way of acquiring only a random subset of probe locations from the field of view. By doing this, the acquisition time is significantly reduced, in some cases by a factor of 10-100 times. The acquired data is then processed to fill-in or inpaint the missing data, taking advantage of the inherently low-complex signals which can be linearly combined to recover the information.</p><p>In this work, similar methods are demonstrated for the acquisition of 4-D STEM data, where only a random subset of CBED patterns are acquired over the raster scan. We simulate the compressive sensing acquisition method for 4-D STEM and present our findings for a variety of analysis techniques such as ptychography and differential phase contrast. Our results show that acquisition times can be significantly reduced on the order of 100-300 times, therefore improving existing frame rates, as well as further reducing the electron fluence beyond just using a faster camera.</p>","PeriodicalId":16484,"journal":{"name":"Journal of microscopy","volume":"295 3","pages":"278-286"},"PeriodicalIF":1.5,"publicationDate":"2024-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jmi.13315","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140856170","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Future proofing core facilities with a seven-pillar model 采用七根支柱模式为核心设施的未来发展保驾护航
IF 2 4区 工程技术
Journal of microscopy Pub Date : 2024-05-03 DOI: 10.1111/jmi.13314
Erin M. Tranfield, Saskia Lippens
{"title":"Future proofing core facilities with a seven-pillar model","authors":"Erin M. Tranfield,&nbsp;Saskia Lippens","doi":"10.1111/jmi.13314","DOIUrl":"10.1111/jmi.13314","url":null,"abstract":"<p>Centralised core facilities have evolved into vital components of life science research, transitioning from a primary focus on centralising equipment to ensuring access to technology experts across all facets of an experimental workflow. Herein, we put forward a seven-pillar model to define what a core facility needs to meet its overarching goal of facilitating research. The seven equally weighted pillars are Technology, Core Facility Team, Training, Career Tracks, Technical Support, Community and Transparency. These seven pillars stand on a solid foundation of cultural, operational and framework policies including the elements of transparent and stable funding strategies, modern human resources support, progressive facility leadership and management as well as clear institute strategies and policies. This foundation, among other things, ensures a tight alignment of the core facilities to the vision and mission of the institute. To future-proof core facilities, it is crucial to foster all seven of these pillars, particularly focusing on newly identified pillars such as career tracks, thus enabling core facilities to continue supporting research and catalysing scientific advancement.</p><p><b>Lay abstract</b>: In research, there is a growing trend to bring advanced, high-performance equipment together into a centralised location. This is done to streamline how the equipment purchase is financed, how the equipment is maintained, and to enable an easier approach for research scientists to access these tools in a location that is supported by a team of technology experts who can help scientists use the equipment. These centralised equipment centres are called Core Facilities.</p><p>The core facility model is relatively new in science and it requires an adapted approach to how core facilities are built and managed. In this paper, we put forward a seven-pillar model of the important supporting elements of core facilities. These supporting elements are: Technology (the instruments themselves), Core Facility Team (the technology experts who operate the instruments), Training (of the staff and research community), Career Tracks (for the core facility staff), Technical Support (the process of providing help to apply the technology to a scientific question), Community (of research scientist, technology experts and developers) and Transparency (of how the core facility works and the costs associated with using the service). These pillars stand on the bigger foundation of clear policies, guidelines, and leadership approaches at the institutional level. With a focus on these elements, the authors feel core facilities will be well positioned to support scientific discovery in the future.</p>","PeriodicalId":16484,"journal":{"name":"Journal of microscopy","volume":"294 3","pages":"411-419"},"PeriodicalIF":2.0,"publicationDate":"2024-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jmi.13314","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140839569","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Recognising the importance and impact of Imaging Scientists: Global guidelines for establishing career paths within core facilities 承认成像科学家的重要性和影响力:在核心设施内建立职业发展途径的全球指导方针
IF 2 4区 工程技术
Journal of microscopy Pub Date : 2024-05-01 DOI: 10.1111/jmi.13307
Graham D. Wright, Kerry A. Thompson, Yara Reis, Johanna Bischof, Philip Edward Hockberger, Michelle S. Itano, Lisa Yen, Stephen Taiye Adelodun, Nikki Bialy, Claire M. Brown, Linda Chaabane, Teng-Leong Chew, Andrew I. Chitty, Fabrice P. Cordelières, Mariana De Niz, Jan Ellenberg, Lize Engelbrecht, Eunice Fabian-Morales, Elnaz Fazeli, Julia Fernandez-Rodriguez, Elisa Ferrando-May, Georgina Fletcher, Graham John Galloway, Adan Guerrero, Jander Matos Guimarães, Caron A. Jacobs, Sachintha Jayasinghe, Eleanor Kable, Gregory T Kitten, Shinya Komoto, Xiaoxiao Ma, Jéssica Araújo Marques, Bryan A. Millis, Kildare Miranda, Peter JohnO'Toole, Sunday Yinka Olatunji, Federica Paina, Cora Noemi Pollak, Clara Prats, Joanna W. Pylvänäinen, Mai Atef Rahmoon, Michael A. Reiche, James Douglas Riches, Andres Hugo Rossi, Jean Salamero, Caroline Thiriet, Stefan Terjung, Aldenora dos Santos Vasconcelos, Antje Keppler
{"title":"Recognising the importance and impact of Imaging Scientists: Global guidelines for establishing career paths within core facilities","authors":"Graham D. Wright,&nbsp;Kerry A. Thompson,&nbsp;Yara Reis,&nbsp;Johanna Bischof,&nbsp;Philip Edward Hockberger,&nbsp;Michelle S. Itano,&nbsp;Lisa Yen,&nbsp;Stephen Taiye Adelodun,&nbsp;Nikki Bialy,&nbsp;Claire M. Brown,&nbsp;Linda Chaabane,&nbsp;Teng-Leong Chew,&nbsp;Andrew I. Chitty,&nbsp;Fabrice P. Cordelières,&nbsp;Mariana De Niz,&nbsp;Jan Ellenberg,&nbsp;Lize Engelbrecht,&nbsp;Eunice Fabian-Morales,&nbsp;Elnaz Fazeli,&nbsp;Julia Fernandez-Rodriguez,&nbsp;Elisa Ferrando-May,&nbsp;Georgina Fletcher,&nbsp;Graham John Galloway,&nbsp;Adan Guerrero,&nbsp;Jander Matos Guimarães,&nbsp;Caron A. Jacobs,&nbsp;Sachintha Jayasinghe,&nbsp;Eleanor Kable,&nbsp;Gregory T Kitten,&nbsp;Shinya Komoto,&nbsp;Xiaoxiao Ma,&nbsp;Jéssica Araújo Marques,&nbsp;Bryan A. Millis,&nbsp;Kildare Miranda,&nbsp;Peter JohnO'Toole,&nbsp;Sunday Yinka Olatunji,&nbsp;Federica Paina,&nbsp;Cora Noemi Pollak,&nbsp;Clara Prats,&nbsp;Joanna W. Pylvänäinen,&nbsp;Mai Atef Rahmoon,&nbsp;Michael A. Reiche,&nbsp;James Douglas Riches,&nbsp;Andres Hugo Rossi,&nbsp;Jean Salamero,&nbsp;Caroline Thiriet,&nbsp;Stefan Terjung,&nbsp;Aldenora dos Santos Vasconcelos,&nbsp;Antje Keppler","doi":"10.1111/jmi.13307","DOIUrl":"10.1111/jmi.13307","url":null,"abstract":"<p>In the dynamic landscape of scientific research, imaging core facilities are vital hubs propelling collaboration and innovation at the technology development and dissemination frontier. Here, we present a collaborative effort led by Global BioImaging (GBI), introducing international recommendations geared towards elevating the careers of Imaging Scientists in core facilities. Despite the critical role of Imaging Scientists in modern research ecosystems, challenges persist in recognising their value, aligning performance metrics and providing avenues for career progression and job security. The challenges encompass a mismatch between classic academic career paths and service-oriented roles, resulting in a lack of understanding regarding the value and impact of Imaging Scientists and core facilities and how to evaluate them properly. They further include challenges around sustainability, dedicated training opportunities and the recruitment and retention of talent. Structured across these interrelated sections, the recommendations within this publication aim to propose globally applicable solutions to navigate these challenges. These recommendations apply equally to colleagues working in other core facilities and research institutions through which access to technologies is facilitated and supported. This publication emphasises the pivotal role of Imaging Scientists in advancing research programs and presents a blueprint for fostering their career progression within institutions all around the world.</p>","PeriodicalId":16484,"journal":{"name":"Journal of microscopy","volume":"294 3","pages":"397-410"},"PeriodicalIF":2.0,"publicationDate":"2024-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jmi.13307","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140839573","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Suborganellar resolution imaging for the localisation of human glycosylation enzymes in tobacco Golgi bodies 用于烟草高尔基体中人类糖基化酶定位的亚组织细胞分辨率成像技术
IF 2 4区 工程技术
Journal of microscopy Pub Date : 2024-04-30 DOI: 10.1111/jmi.13311
Alastair J. McGinness, Susan A. Brooks, Richard Strasser, Jennifer Schoberer, Verena Kriechbaumer
{"title":"Suborganellar resolution imaging for the localisation of human glycosylation enzymes in tobacco Golgi bodies","authors":"Alastair J. McGinness, Susan A. Brooks, Richard Strasser, Jennifer Schoberer, Verena Kriechbaumer","doi":"10.1111/jmi.13311","DOIUrl":"https://doi.org/10.1111/jmi.13311","url":null,"abstract":"Plant cells are a capable system for producing economically and therapeutically important proteins for a variety of applications, and are considered a safer production system than some existing hosts such as bacteria or yeasts. However, plants do not perform protein modifications in the same manner as mammalian cells do. This can impact on protein functionality for plant‐produced human therapeutics. This obstacle can be overcome by creating a plant‐based system capable of ‘humanising’ proteins of interest resulting in a glycosylation profile of synthetic plant‐produced proteins as it would occur in mammalian systems.For this, the human glycosylation enzymes (HuGEs) involved in N‐linked glycosylation N‐acetylglucosaminyltransferase IV and V (GNTIV and GNTV), β‐1,4‐galactosyltransferase (B4GALT1), and α‐2,6‐sialyltransferase (ST6GAL) were expressed in plant cells. For these enzymes to carry out the stepwise glycosylation functions, they need to localise to late Golgi body cisternae. This was achieved by a protein targeting strategy of replacing the mammalian Golgi targeting domains (Cytoplasmic‐Transmembrane‐Stem (CTS) regions) with plant‐specific ones. Using high‐resolution and dynamic confocal microscopy, we show that GNTIV and GNTV were successfully targeted to the medial‐Golgi cisternae while ST6GAL and B4GALT1 were targeted to &lt;jats:italic&gt;trans‐&lt;/jats:italic&gt;Golgi cisternae.Plant cells are a promising system to produce human therapeutics for example proteins used in enzyme replacement therapies. Plants can provide safer and cheaper alternatives to existing expression systems such as mammalian cell culture, bacteria or yeast. An important factor for the functionality of therapeutic proteins though are protein modifications specific to human cells. However, plants do not perform protein modifications in the same manner as human cells do. Therefore, plant cells need to be genetically modified to mimic human protein modifications patterns. The modification of importance here, is called N‐linked glycosylation and adds specific sugar molecules onto the proteins.Here we show the expression of four human glycosylation enzymes, which are required for N‐linked glycosylation, in plant cells.In addition, as these protein modifications are carried out in cells resembling a factory production line, it is important that the human glycosylation enzymes be placed in the correct cellular compartments and in the correct order. This is carried out in Golgi bodies. Golgi bodies are composed of several defined stacks termed &lt;jats:italic&gt;cis&lt;/jats:italic&gt;‐, medial and &lt;jats:italic&gt;trans&lt;/jats:italic&gt;‐Golgi body stacks. For correct protein function, two of these human glycosylation enzymes need to be placed in the medial‐Golgi attacks and the other two in the &lt;jats:italic&gt;trans&lt;/jats:italic&gt;‐Golgi stacks. Using high‐resolution laser microscopy in live plant cells, we show here that the human glycosylation enzymes are sent within the cells to the correct Golgi body s","PeriodicalId":16484,"journal":{"name":"Journal of microscopy","volume":"14 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2024-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140839393","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Characterisation and correction of polarisation effects in fluorescently labelled fibres 荧光标记光纤极化效应的表征与校正
IF 2 4区 工程技术
Journal of microscopy Pub Date : 2024-04-29 DOI: 10.1111/jmi.13308
Nandini Aggarwal, Richard Marsh, Stefania Marcotti, Tanya J Shaw, Brian Stramer, Susan Cox, Siân Culley
{"title":"Characterisation and correction of polarisation effects in fluorescently labelled fibres","authors":"Nandini Aggarwal, Richard Marsh, Stefania Marcotti, Tanya J Shaw, Brian Stramer, Susan Cox, Siân Culley","doi":"10.1111/jmi.13308","DOIUrl":"https://doi.org/10.1111/jmi.13308","url":null,"abstract":"SummaryMany biological structures take the form of fibres and filaments, and quantitative analysis of fibre organisation is important for understanding their functions in both normal physiological conditions and disease. In order to visualise these structures, fibres can be fluorescently labelled and imaged, with specialised image analysis methods available for quantifying the degree and strength of fibre alignment. Here we show that fluorescently labelled fibres can display polarised emission, with the strength of this effect varying depending on structure and fluorophore identity. This can bias automated analysis of fibre alignment and mask the true underlying structural organisation. We present a method for quantifying and correcting these polarisation effects without requiring polarisation‐resolved microscopy and demonstrate its efficacy when applied to images of fluorescently labelled collagen gels, allowing for more reliable characterisation of fibre microarchitecture.","PeriodicalId":16484,"journal":{"name":"Journal of microscopy","volume":"90 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2024-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140839398","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Innovating in a bioimaging core through instrument development 通过仪器开发在生物成像核心进行创新
IF 2 4区 工程技术
Journal of microscopy Pub Date : 2024-04-29 DOI: 10.1111/jmi.13312
Sebastian Munck, Christof De Bo, Christopher Cawthorne, Julien Colombelli
{"title":"Innovating in a bioimaging core through instrument development","authors":"Sebastian Munck,&nbsp;Christof De Bo,&nbsp;Christopher Cawthorne,&nbsp;Julien Colombelli","doi":"10.1111/jmi.13312","DOIUrl":"10.1111/jmi.13312","url":null,"abstract":"<p>Developing devices and instrumentation in a bioimaging core facility is an important part of the innovation mandate inherent in the core facility model but is a complex area due to the required skills and investments, and the impossibility of a universally applicable model. Here, we seek to define technological innovation in microscopy and situate it within the wider core facility innovation portfolio, highlighting how strategic development can accelerate access to innovative imaging modalities and increase service range, and thus maintain the cutting edge needed for sustainability. We consider technology development from the perspective of core facility staff and their stakeholders as well as their research environment and aim to present a practical guide to the ‘Why, When, and How’ of developing and integrating innovative technology in the core facility portfolio.</p><p>Core facilities need to innovate to stay up to date. However, how to carry out the innovation is not very obvious. One area of innovation in imaging core facilities is the building of optical setups. However, the creation of optical setups requires specific skill sets, time, and investments. Consequently, the topic of whether a core facility should develop optical devices is discussed as controversial. Here, we provide resources that should help get into this topic, and we discuss different options when and how it makes sense to build optical devices in core facilities. We discuss various aspects, including consequences for staff and the relation of the core to the institute, and also broaden the scope toward other areas of innovation.</p>","PeriodicalId":16484,"journal":{"name":"Journal of microscopy","volume":"294 3","pages":"319-337"},"PeriodicalIF":2.0,"publicationDate":"2024-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jmi.13312","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140839396","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Analysis of microscopy techniques to measure segregation in continuous-cast steel slabs 测量连铸钢板偏析的显微镜技术分析
IF 1.5 4区 工程技术
Journal of microscopy Pub Date : 2024-04-27 DOI: 10.1111/jmi.13310
Araf Al Rafi, Begoña Santillana, Renfei Feng, Brian G. Thomas, André B. Phillion
{"title":"Analysis of microscopy techniques to measure segregation in continuous-cast steel slabs","authors":"Araf Al Rafi,&nbsp;Begoña Santillana,&nbsp;Renfei Feng,&nbsp;Brian G. Thomas,&nbsp;André B. Phillion","doi":"10.1111/jmi.13310","DOIUrl":"10.1111/jmi.13310","url":null,"abstract":"<p>The accurate characterisation of centreline segregation requires precise measurements of composition variations over large length scales (10<span></span><math>\u0000 <semantics>\u0000 <msup>\u0000 <mrow></mrow>\u0000 <mrow>\u0000 <mo>−</mo>\u0000 <mn>1</mn>\u0000 </mrow>\u0000 </msup>\u0000 <annotation>$^{-1}$</annotation>\u0000 </semantics></math> <span></span><math>\u0000 <semantics>\u0000 <mi>m</mi>\u0000 <annotation>${rm {m}}$</annotation>\u0000 </semantics></math>) across the centreline of the cast product, while having high resolution, sufficient to quantify the significant composition variations between dendrites due to microsegregation at very small length scales (10<span></span><math>\u0000 <semantics>\u0000 <mrow>\u0000 <msup>\u0000 <mrow></mrow>\u0000 <mrow>\u0000 <mo>−</mo>\u0000 <mn>5</mn>\u0000 </mrow>\u0000 </msup>\u0000 <mi>m</mi>\u0000 </mrow>\u0000 <annotation>$^{-5}{rm {m}}$</annotation>\u0000 </semantics></math>). This study investigates the potential of a novel microscopy technique, named Synchrotron Micro X-ray Flurorescence (SMXRF), to generate large-scale high-resolution segregation maps from a steel sample taken from a thin slab caster. Two methods, Point Analysis and Regression Analysis, are proposed for SMXRF data calibration. By comparing with the traditional Laser-Induced Breakdown Spectroscopy (LIBS), and Electron Probe Micro Analyser (EPMA) techniques, we show that SMXRF is successful in quantitative characterisation of centreline segregation. Over large areas (e.g. 12 <span></span><math>\u0000 <semantics>\u0000 <mo>×</mo>\u0000 <annotation>$times$</annotation>\u0000 </semantics></math> 16 <span></span><math>\u0000 <semantics>\u0000 <msup>\u0000 <mi>mm</mi>\u0000 <mn>2</mn>\u0000 </msup>\u0000 <annotation>${rm {mm}}^2$</annotation>\u0000 </semantics></math>) and at high resolution (10–50 <span></span><math>\u0000 <semantics>\u0000 <mrow>\u0000 <mi>μ</mi>\u0000 <mi>m</mi>\u0000 </mrow>\u0000 <annotation>$mutext{m}$</annotation>\u0000 </semantics></math> pixel size) various techniques yield comparable outcomes in terms of composition maps and solute profiles. The findings also highlight the importance of both high spatial resolution and large field of view to have a quantitative, accurate, and efficient measurement tool to investigate segregation phenomena.</p>","PeriodicalId":16484,"journal":{"name":"Journal of microscopy","volume":"295 3","pages":"266-277"},"PeriodicalIF":1.5,"publicationDate":"2024-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jmi.13310","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140810054","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Single-shot differential phase contrast microscopy using ring-shaped polarisation multiplexing illumination 使用环形偏振多路复用照明的单次差分相衬显微镜。
IF 1.5 4区 工程技术
Journal of microscopy Pub Date : 2024-04-25 DOI: 10.1111/jmi.13309
Shengping Wang, Yifu Ma, Mengyuan Xie, Manhong Yao, Zibang Zhang, Jingang Zhong
{"title":"Single-shot differential phase contrast microscopy using ring-shaped polarisation multiplexing illumination","authors":"Shengping Wang,&nbsp;Yifu Ma,&nbsp;Mengyuan Xie,&nbsp;Manhong Yao,&nbsp;Zibang Zhang,&nbsp;Jingang Zhong","doi":"10.1111/jmi.13309","DOIUrl":"10.1111/jmi.13309","url":null,"abstract":"<p>We propose a differential phase contrast microscopy that enables single-shot phase imaging for unstained biological samples. The proposed approach employs a ring-shaped LED array for polarisation multiplexing illumination and a polarisation camera for image acquisition. As such, multiple images of different polarisation angles can be simultaneously captured with a single shot. Through polarisation demultiplexing, the sample phase can therefore be recovered from the single-shot measurement. Both simulations and experiments demonstrate the effectiveness of the approach. We also demonstrate that ring-shaped illumination enables higher contrast and lower-distortion imaging results than disk-shaped illumination does. The proposed single-shot approach potentially enables phase contrast imaging for live cell samples in vitro.</p><p><b>Lay Description</b>: We propose a microscopy that enables imaging of transparent samples, unstained cells, etc. We demonstrate that the proposed method enables higher contrast and lower-distortion imaging results than conventional methods, and significantly improves imaging efficiency. The proposed method potentially enables dynamic imaging for live cell samples in vitro.</p>","PeriodicalId":16484,"journal":{"name":"Journal of microscopy","volume":"295 3","pages":"257-265"},"PeriodicalIF":1.5,"publicationDate":"2024-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140656263","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Staying on track – Keeping things running in a high-end scientific imaging core facility 保持正常运转 - 确保高端科学成像核心设施的正常运行。
IF 2 4区 工程技术
Journal of microscopy Pub Date : 2024-04-24 DOI: 10.1111/jmi.13304
Oliver Renaud, Nathalie Aulner, Audrey Salles, Nadia Halidi, Maia Brunstein, Adeline Mallet, Karin Aumayr, Stefan Terjung, Daniel Levy, Saskia Lippens, Jean-Marc Verbavatz, Thomas Heuser, Rachel Santarella-Mellwig, Jean-Yves Tinevez, Tatiana Woller, Alexander Botzki, Christopher Cawthorne, The Core4Life Consortium, Sebastian Munck
{"title":"Staying on track – Keeping things running in a high-end scientific imaging core facility","authors":"Oliver Renaud,&nbsp;Nathalie Aulner,&nbsp;Audrey Salles,&nbsp;Nadia Halidi,&nbsp;Maia Brunstein,&nbsp;Adeline Mallet,&nbsp;Karin Aumayr,&nbsp;Stefan Terjung,&nbsp;Daniel Levy,&nbsp;Saskia Lippens,&nbsp;Jean-Marc Verbavatz,&nbsp;Thomas Heuser,&nbsp;Rachel Santarella-Mellwig,&nbsp;Jean-Yves Tinevez,&nbsp;Tatiana Woller,&nbsp;Alexander Botzki,&nbsp;Christopher Cawthorne,&nbsp;The Core4Life Consortium,&nbsp;Sebastian Munck","doi":"10.1111/jmi.13304","DOIUrl":"10.1111/jmi.13304","url":null,"abstract":"<p>Modern life science research is a collaborative effort. Few research groups can single-handedly support the necessary equipment, expertise and personnel needed for the ever-expanding portfolio of technologies that are required across multiple disciplines in today's life science endeavours. Thus, research institutes are increasingly setting up scientific core facilities to provide access and specialised support for cutting-edge technologies. Maintaining the momentum needed to carry out leading research while ensuring high-quality daily operations is an ongoing challenge, regardless of the resources allocated to establish such facilities. Here, we outline and discuss the range of activities required to keep things running once a scientific imaging core facility has been established. These include managing a wide range of equipment and users, handling repairs and service contracts, planning for equipment upgrades, renewals, or decommissioning, and continuously upskilling while balancing innovation and consolidation.</p>","PeriodicalId":16484,"journal":{"name":"Journal of microscopy","volume":"294 3","pages":"276-294"},"PeriodicalIF":2.0,"publicationDate":"2024-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jmi.13304","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140660561","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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