Microscopy Evaluation
Microscopy Evaluation - Related Videos
02:44
Phase-Contrast Microscopy for Evaluating Developmental Mutants in Streptomyces
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2025
Source: Bennett, J. A. et al. Visual and Microscopic Evaluation of Streptomyces Developmental Mutants. J. Vis. Exp. (2018)This video demonstrates the use of phase-contrast microscopy to examine phenotypic differences between wild-type and mutant Streptomyces coelicolor. It outlines the steps involved in preparing and imaging aerial filaments to detect developmental defects in spore formation.
02:14
Microscopy-Based Evaluation of Bacterial Attachment to Plant Root Surfaces
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2026
Source: Matthysse, A. G. Adherence of Bacteria to Plant Surfaces Measured in the Laboratory. J. Vis. Exp. (2018).This video demonstrates the evaluation of bacterial attachment to plant roots using phase-contrast microscopy. Root samples from seedlings incubated with bacteria are first mounted to check for free bacteria. The samples are then washed to remove loosely attached bacteria and remounted using a suitable coverslip to prevent damage. Finally, the number of bacteria attached to the root...
10:09
Evaluation and Manipulation of Neural Activity Using Two-Photon Holographic Microscopy
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Cited by 1 •
2022
We developed a two-photon holographic microscope that can visualize, assess, and manipulate neural activity using high spatiotemporal resolution, with the aim of elucidating the pathogenesis of neuropsychiatric disorders that are associated with abnormal neural activity.
11:16
Correlative Light- and Electron Microscopy Using Quantum Dot Nanoparticles
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Cited by 12 •
2016
A method is described whereby quantum dot (QD) nanoparticles can be used for correlative immunocytochemical studies of epoxy embedded human pathology tissue. We employ commercial antibody fragment conjugated QDs that are visualized by widefield fluorescence light microscopy and transmission electron microscopy.
10:07
Highly Resolved Intravital Striped-illumination Microscopy of Germinal Centers
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2014
High-resolution intravital imaging with enhanced contrast up to 120 µm depth in lymph nodes of adult mice is achieved by spatially modulating the excitation pattern of a multi-focal two-photon microscope. In 100 µm depth we measured resolutions of 487 nm (lateral) and 551 nm (axial), thus circumventing scattering and diffraction limits.
FAQs
Magnification and resolution should be considered together, because a highly enlarged image is not automatically a more reliable representation of biological structure. Evaluation asks whether the selected magnification and achieved resolution support the features being examined, while also considering focus, contrast, and illumination. This helps prevent interpretations based on scale alone when image detail remains inadequate.
Contrast, illumination, and focus determine how clearly structures appear in the recorded image. During evaluation, deficiencies in these factors can be considered alongside observed morphology to decide whether a feature is consistently visible or may reflect limited image quality. This assessment is especially important when comparing cells, tissues, or microorganisms across samples and interpreting apparent differences.
Specimen preparation can affect whether observed features represent genuine biology or imaging-related artifacts. Microscopy evaluation therefore considers preparation conditions together with magnification, focus, contrast, and illumination. Reviewing these factors helps identify limitations that could alter the appearance of cellular or tissue structures, improving confidence that recorded morphology reflects the specimen rather than an avoidable imaging problem.
Controls and expected cellular morphology provide reference points for judging whether an observed feature is plausible and consistently represented. Comparing images with these references helps distinguish genuine biological variation from artifacts or instrument-related limitations. The comparison also supports more reliable interpretation when researchers characterize cells, tissues, microorganisms, or developmental changes using microscopy.
A practical workflow begins by selecting an instrument appropriate for the biological question, then examining magnification, resolution, contrast, illumination, focus, and specimen preparation. Researchers compare the resulting images with controls or expected morphology, identify artifacts and limitations, and determine whether image quality supports interpretation or quantitative analysis. Recording these judgments strengthens experimental quality control and reproducibility.
Microscopy evaluation is useful whenever biological conclusions depend on image quality or accurate structural interpretation. Applications include cell and tissue characterization, microbial observation, developmental studies, and quantitative image analysis. By guiding instrument selection and quality control, the evaluation helps researchers assess whether differences in images reflect biological variation and whether the data are suitable for further analysis.