Lugol's Staining
Lugol's Staining - Related Videos
11:33
Microscopy and Staining: Gram, Capsule, and Endospore Staining
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2023
Source: Rhiannon M. LeVeque1, Natalia Martin1, Andrew J. Van Alst1, and Victor J. DiRita1 1 Department of Microbiology and Molecular Genetics, Michigan State University, East Lansing, Michigan, United States of America Bacteria are diverse microorganisms found nearly everywhere on Earth. Many properties help distinguish them from each other, including but not limited to Gram-staining type, shape and arrangement, production of capsule, and formation of spores. To observe these properties, one...
10:55
Staining Proteins in Gels
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Cited by 7 •
2008
Following separation by electrophoretic methods, proteins in a gel can be detected by several staining methods. Staining of proteins with Coomassie Blue, Silver Staining, SYPRO Orange, SYPRO Ruby are demonstrated in this video.
03:12
May-Grunwald Giemsa Staining: A Method to Stain Bone Marrow Cells
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2023
This video describes the technique of staining bone marrow cells using May- Grünwald Giemsa Staining. In the protocol, we will stain the murine myeloid leukemia cells, C149 cells, to analyze the morphology and differential counting.
13:10
Antibody Staining in C. Elegans Using "Freeze-Cracking"
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Cited by 34 •
2013
"Freeze-cracking," a method for exposing the inner tissues of the nematode C. elegans to antibodies for protein localization, is demonstrated.
08:55
Histological Staining of Neural Tissue
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2023
In order to examine the cellular, structural and molecular layout of tissues and organs, researchers use a method known as histological staining. In this technique, a tissue of interest is preserved using chemical fixatives and sectioned, or cut into very thin slices. A variety of staining techniques are then applied to provide contrast to the visually uniform sections. In the study of neuroanatomy, histological techniques are frequently applied to visualize and study nervous system tissue.
FAQs
The iodine solution increases optical contrast by penetrating cells and reacting with starch and other cellular components. This makes organism shape, size, and internal structure easier to distinguish under a microscope. The resulting visual clarity supports more consistent examination of small biological material in water samples and helps reveal features that may otherwise be difficult to observe.
Iodine and potassium iodide together form the solution applied to environmental samples. The formulation penetrates cells and reacts with starch and other cellular components, producing increased contrast while helping preserve the material for observation. This combined action allows the same sample to support visual assessment of morphology and microscopic examination of planktonic communities.
Starch-rich material develops a blue-black or dark-brown appearance because the iodine-containing stain reacts with starch. This color response creates a visible distinction between starch-containing material and surrounding sample components. In environmental microscopy, that distinction can help observers recognize cellular contents and interpret internal structure alongside overall organism shape and size.
A basic workflow applies the iodine solution to a water sample, allows the biological material to be preserved and contrasted, and then examines the prepared material by microscopy. The observer can evaluate visible organisms and particulate material, recording features such as shape, size, and internal structure for later enumeration or taxonomic assessment.
Microscopic examination after staining can support cell enumeration and taxonomic assessment of phytoplankton, algae, and other planktonic communities. The enhanced contrast helps reveal organismal features needed for observation, while preservation supports examination of the collected material. These outcomes allow environmental samples to be characterized using both abundance-related counts and visible biological traits.
Researchers can use stained water samples to compare planktonic communities across sampling sites and seasons. Consistent contrast helps reveal and assess the organisms present, supporting environmental surveys and monitoring of aquatic ecosystems. Repeated comparisons can therefore document differences in community observations over space and time without relying only on unstained sample appearance.