Microscopic Identification
Microscopic Identification - Related Videos
14:12
Rodent Identification II
0 Views •
2015
Source: Kay Stewart, RVT, RLATG, CMAR; Valerie A. Schroeder, RVT, RLATG. University of Notre Dame, IN Animal records must be accurately maintained to ensure that data collection is correct. Records range from maintaining information on cage cards to having a detailed database with all of the relevant information on each animal. The primary component of recordkeeping is the individual identification of research animals. There are a variety of methods suitable for identifying mice and rats. This...
11:09
Rodent Identification I
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2015
Source: Kay Stewart, RVT, RLATG, CMAR; Valerie A. Schroeder, RVT, RLATG. University of Notre Dame, IN A fundamental requirement of biomedical research is the proper identification of research animals. It is essential that the right animal is utilized for procedures and data collection. Laboratory mice and rats can be identified with the following permanent methods: ear tags, ear punch codes, microchip implantation, tail tattoos for adult mice, and toe tattoos for neonates. Temporary methods of...
09:37
Helminth Collection and Identification from Wildlife
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Cited by 51 •
2013
Wild animals are commonly parasitized by a wide range of helminths. The four major types of helminths are “roundworms” (nematodes), “thorny-headed worms” (acanthocephalans), “flukes” (trematodes), and “tapeworms” (cestodes). Here we describe how helminths are collected from a vertebrate animal and how they are preserved and taxonomically...
08:27
Sampling and Identification of Microplastics in Groundwater
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2025
Here, we provide a detailed description of sampling groundwater from a borehole for microplastics analysis using a patented sampling system developed for this purpose. The protocol details the methods for sampling microplastics from boreholes, as well as the separation and chemical identification of microplastics.
04:57
Proper Care and Cleaning of the Microscope
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Cited by 2 •
2008
Keeping the microscope optics clean is important for high-quality imaging. Dust, fingerprints, excess immersion oil, or mounting medium on or in a microscope causes reduction in contrast and resolution. DIC is especially sensitive to contamination and scratches on the lens surfaces. This protocol details the procedure for keeping the microscope clean.
FAQs
Microscopic identification depends on combining several observable traits rather than relying on magnification alone. Size and shape provide an initial basis for comparison, while surface structures and cellular organization add distinguishing detail. Image contrast is equally important because it makes these features easier to see. Together, these observations support classification against reference descriptions or identification keys.
Microscopy provides an initial view of what a complex environmental sample contains and how its structures appear. This visual information can guide interpretation before molecular or chemical analyses are applied. It therefore contributes a different type of evidence, based on observable organization and morphology, while helping researchers place later analytical results within the context of the original sample.
Reference descriptions and identification keys turn visual observations into a structured classification process. Researchers compare features such as size, shape, surface structures, and cellular organization with established descriptions rather than relying only on personal judgment. This comparison supports more consistent recognition of microorganisms, cells, particles, or other structures across samples and helps organize findings for environmental interpretation.
A basic workflow begins by examining the environmental sample with microscopy, using magnification and image contrast to reveal relevant structures. The observer then records visible characteristics, including dimensions, shape, surface features, and cellular organization. Finally, those observations are compared with reference descriptions or identification keys, producing a classification that can support further environmental analysis.
The approach can be applied to water, soil, sediment, and airborne material. Each sample type may contain a complex mixture of microorganisms, cells, particles, or other structures whose visible characteristics can be examined microscopically. Covering these different environmental materials allows researchers to investigate biological and particulate features across aquatic, terrestrial, sedimentary, and atmospheric settings.
In environmental sciences, microscopic identification helps researchers examine microbial communities, recognize indicators associated with pollution, monitor ecological change, and evaluate environmental health. Its value comes from linking visible sample characteristics with broader environmental questions. Findings can also provide a practical basis for deciding how molecular or chemical analyses should be interpreted in relation to the observed sample.