Learn & Share: Widefield Microscopy?
Widefield microscopy refers to a basic sample illumination principle in microscopy. Since widefield microscopy permanently illuminates the whole sample, it can be distinguished from confocal microscopy where only one single focal spot is illuminated and recorded at a time. Typically, widefield microscopy utilizes light sources such as halogen, metal halide lamps or LED for sample illumination. Detection is performed through oculars or with the help of a digital camera. Several contrast methods increase widefield microscopy capabilities, starting from Phase Contrast through to Differential Interference Contrast (DIC) or fluorescence, to name but a few. Computer based deconvolution can be applied to increase widefield fluorescence image quality and enable 3D image reconstruction. Moreover, TIRF and GSDIM super-resolution microscopy can be assigned to widefield microscopy.
Monitoring Immunosuppressive Mechanisms from Infection
This application note discusses the importance of fast, sensitive, and haze-free imaging for the monitoring of immunosuppression in mouse lung epithelial tissue infected with the Puerto Rico 8…Read article
Studying Actin Cytoskeleton and Microfilament Assembly
This article demonstrates how actin microfilament assemblies can be clearly visualized with superior resolution at the plasma membrane of a cell using a DMi8 S Infinity TIRF High Power imaging…Read article
Dissecting Proteomic Heterogeneity of the Tumor Microenvironment
This lecture will highlight cutting edge applications in applying laser microdissection and microscaled quantitative proteomics and phosphoproteomics to uncover exquisite intra- and inter-tumor…Read article
“Brains-In-A-Dish” from Induced Pluripotent Stem Cells (iPSCs)
This article discusses the benefits of using the THUNDER technology for imaging inside 3D human cortical brain organoids. These organoids are derived from human induced pluripotent stem cells (iPSCs)…Read article
Fission Yeast Actomyosin Ring Integrity
This article demonstrates that the stress-activated protein kinase pathway (SAPK) and its effector, MAPK Sty1, downregulates CAR assembly in the fission yeast Schizosaccharomyces pombe when its…Read article
Developing Heart Pacemaker Cells from Cardiac Spheroids
During the last decade, 3D cell culture has been established as a more realistic model compared to classical 2D culture systems. Cells can develop into miniature 3D objects, so called spheroids, which…Read article
Into the Third Dimension with "Wow Effect"- Observe Cells in 3D and Real-Time
Life is fast, especially for a cell. As a rule, cells should be examined under physiological conditions which are as close as possible to their natural environment. New technologies offer tremendous…Read article
Observing 3D Cell Cultures During Development
3D cell cultures, such as organoids and spheroids, give insights into cells and their interactions with their microenvironment. These 3D cell cultures are playing an increasingly important role for…Read article
Cytosolic Calcium Ions in Melanoma Cancer Cells
In this article, a ratiometric fluorometric method for cytosolic calcium ion (Ca2+) measurement in cultured melanoma cells using Fura 2-AM cell loading and fluorescence microscopy imaging is presented…Read article
Download The Guide to Live Cell Imaging
In life science research, live cell imaging is an indispensable tool to visualize cells in a state as in vivo as possible. This E-book reviews a wide range of important considerations to take to…Read article
Studying Cell Division
Cell division is a biological process during which all cellular components must be distributed among the daughter cells. The division process requires firm coordination for success. Microscopy is…Read article
Viral Infections – Studying Influenza-host Interactions in 3D Specimens
Stefan Finke studies virus-host interactions. It turns out that the ways the virus and host interact are different when comparing results from classical laboratory monolayer cell lines and “close to…Read article
Finding new Scaffolds for Tissue Engineering
Tissue engineers use biomaterials for a variety of applications from drug delivery to supporting the regeneration of damaged or lost tissues to creating in vitro disease models. Scaffold architecture…Read article
The Power of Pairing Adaptive Deconvolution with Computational Clearing
Deconvolution is a computational method used to restore the image of the object that is corrupted by the point spread function (PSF) along with sources of noise. In this technical brief, learn how the…Read article
Improvement of Imaging Techniques to Understand Organelle Membrane Cell Dynamics
Understanding cell functions in normal and tumorous tissue is a key factor in advancing research of potential treatment strategies and understanding why some treatments might fail. Single-cell…Read article
Plant Cell Development and Morphogenesis
The article discusses how tubulin molecules, which make up microtubules, in plant cells can be studied with total internal reflection fluorescence (TIRF) microscopy to better understand tubulin…Read article
Studying Pulmonary Fibrosis
The results shown in this article demonstrate that fibrotic and non-fibrotic regions of collagen present in mouse lung tissue can be distinguished better with polarized light compared to brightfield.…Read article
Studying Autoimmune Disease
This article discusses how autoimmune diseases, like systemic lupus erythematosus (SLE), can be studied more efficiently using thick, 3D kidney tissue specimens visualized with a THUNDER Imager . SLE…Read article
Useful Links
Communities and Web Sources
www.researchgate.net/Social network for scientists
www.lsoft.com/scripts/wl.exe?SL1=CONFOCALMICROSCOPY&H=LISTS.UMN.EDUConfocal Microscopy Mailing List, University of Minnesota
www.ibiology.org/Teaching tools, video lectures on biology and microscopy
www.ibiology.org/Teaching tools, video lectures on biology and microscopy
bitesizebio.comOnline magazine and community for molecular and cell biology researchers
www.somersault1824.comResource for high-end scientific illustrations, images and animations
Search Engines and Data Bases
www.cellimagelibrary.orgPublic resource database of images, videos, and animations of cells
harvester.fzk.de/harvesterBioinformatic meta search engine for genes and proteins
www.gopubmed.comSearch interface for pubmed
en.wikipedia.org/wiki/List_of_academic_databases_and_search_enginesList of academic databases and search engines
scholar.google.comBeta of Google's search engine for scientific article abstracts
Journals
www.doaj.org/Directory of open access journals
emboj.embopress.org/The EMBO Journal
www.lifescied.orgCBE-Life Sciences Education – an ASCB online journal
www.sciencemag.org/Science
www.nature.com/Nature
www.cell.com/Biweekly publication of exceptional research articles
jcs.biologists.org/Journal of Cell Science
dev.biologists.org/Development
jeb.biologists.org/The Journal of Experimental Biology
dmm.biologists.org/DMM Disease Models & Mechanisms
www.biotechniques.com/International Journal of Life Science Methods
www.opticsinfobase.org/Collection of Journals and Proceedings in Optics and Photonics
spie.org/x576.xmlSPIE - peer-reviewed journals on applied research in optics and photonics
onlinelibrary.wiley.com/journal/10.1002/(ISSN)1864-0648Journal of Biophotonics
www.plosone.org/home.actionInternational, peer-reviewed, open-access, online publication
rspb.royalsocietypublishing.org/Proceedings B - the Royal Society's biological research journal
www.microscopy-analysis.com/International Journal for microscopists
Organizations
www.microscopy.org/Microscopy Society of America
www.eurmicsoc.org/European Microscopy Society
www.rms.org.uk/Royal Microscopical Society
www.ascb.org/ASCB American Society of Cell Biology
www.biologists.com/cob_activities.htmlthe company of biologists
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