Microscopic Specimen Analysis
Microscopic Specimen Analysis - Related Videos
10:32
Transcriptomic Analysis of Human Retinal Surgical Specimens Using jouRNAl
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Cited by 6 •
2013
We used retinal samples from retinectomy for a transcriptomic analysis of retinal detachment. We developed a procedure that allows RNA conservation between the surgical blocks and the laboratory. We standardized a protocol to purify RNA by cesium chloride ultracentrifugation to assure that the purified RNAs are suitable for microarray analysis.
10:25
Specimen Preparation, Imaging, and Analysis Protocols for Knife-edge Scanning Microscopy
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Cited by 15 •
2011
The full process from brain specimen preparation to serial sectioning imaging using the Knife-Edge Scanning Microscope, to data visualization and analysis is described. This technique is currently used to acquire mouse brain data, but it is applicable to other organs, other species.
10:10
Long-term Culture of Human Breast Cancer Specimens and Their Analysis Using Optical Projection Tomography
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Cited by 11 •
2011
We have developed a collagen-based in vitro assay which promotes proliferation and invasion from samples of all breast cancer subtypes. Optical Projection Tomography, a three dimensional microscopy technique was utilised to visualise and quantify tumour expansion. This assay may be used to quantify drug response of individual tumour samples.
07:49
Preparation of Adult Drosophila Eyes for Thin Sectioning and Microscopic Analysis
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Cited by 21 •
2011
A standard approach to prepare adult Drosophila eyes for semi-thin sectioning and light microscopic analysis is presented here. The protocol can be used for gross morphological analysis of eye defects, or with the indicated adjustments can be used to determine genetic requirements of genes in specific cell types of the eye (e.g. clonal analysis of photoreceptors) or for electron microscopic analysis.
08:08
Major Components of the Light Microscope
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2008
The light microscope is a basic tool for the cell biologist, who should have a thorough understanding of how it works, how it should be aligned for different applications, and how it should be maintained as required to obtain maximum image-forming capacity and resolution. The components of the microscope are described in detail here.
FAQs
Magnification enlarges the viewed image, but enlargement alone does not guarantee that nearby structures can be distinguished. Resolution determines how separately features appear, while contrast makes differences between structures and their surroundings more visible. In practice, effective analysis depends on balancing these properties so that cellular, tissue, or microbial organization can be examined rather than merely producing a larger image.
Stains increase the visual distinction between structures that may otherwise be difficult to separate in an image. This added contrast can help investigators recognize cellular or tissue features and compare their organization. Because staining is an optional aid rather than a universal requirement, its value depends on whether the specimen’s relevant structures need additional differentiation for the intended observation.
The signal must be directed through or onto the prepared specimen in a way that allows the microscope to capture relevant features. What becomes visible therefore depends on how the specimen is prepared and presented, as well as on the imaging conditions. These choices influence whether organization within cells, tissues, microorganisms, or other small structures can be distinguished and recorded.
An analysis begins with preparing the specimen, followed by directing light or another imaging signal through or onto it. The microscope then uses lenses, magnification, and contrast, with stains added when needed to distinguish structures. Finally, the observer records the visible organization and features. Consistent preparation and imaging conditions make observations more reproducible across specimens or analyses.
In biology, the method supports several distinct tasks: identifying cells, characterizing tissues, observing microorganisms, and examining changes such as growth, division, or disease-related alteration. The appropriate emphasis depends on the specimen and the question. Microscopic observations can therefore connect structural features with biological processes, while providing visual evidence for comparisons among specimens.
It serves research, teaching, and diagnostic investigation, with each setting emphasizing different outcomes. Research may focus on organization or biological change, teaching uses visible specimens to support learning, and diagnostic investigation examines features associated with disease-related change. Across these contexts, careful preparation and imaging help produce observations that are clearer, more consistent, and easier to interpret.