Heavy Metal Staining
Heavy Metal Staining - Related Videos
03:50
Capsule-Based Negative Staining of Virus Samples on TEM Grids: A Heavy Metal Staining Technique to Visualize the Ultrastructure of Enveloped Viruses
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2025
In this video, we demonstrate the negative staining of enveloped virus samples using a processing capsule within the biocontainment environment. The negatively stained viruses can be visualized using transmission electron microscopy to investigate viral structure and morphology with nanometer resolution.
10:20
Quantification of Heavy Metals and Other Inorganic Contaminants on the Productivity of Microalgae
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Cited by 14 •
2015
Integration of microalgal cultivation with industrial flue gas will ultimately introduce heavy metals and other inorganic compounds into the growth media. This study presents a procedure used to determine the end fate and impact of heavy metals and inorganic contaminants on the growth of Nannochloropsis salina grown in photobioreactors.
11:14
Two-way Valorization of Blast Furnace Slag: Synthesis of Precipitated Calcium Carbonate and Zeolitic Heavy Metal Adsorbent
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Cited by 6 •
2017
A protocol for the parallel production of precipitated calcium carbonate and zeolitic material from blast furnace slag via mineral carbonation and alkaline hydrothermal conversion, respectively, is presented. The performance of the zeolitic material towards nickel adsorption is tested.
08:08
Rearing the Cabbage White Butterfly (Pieris rapae) in Controlled Conditions: A Case Study with Heavy Metal Tolerance
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Cited by 3 •
2023
This paper presents a detailed protocol for rearing the cabbage white butterfly in controlled lab conditions with an artificial diet, which allows precise manipulations of early-life nutrition and toxin exposure. The representative results show how heavy metal toxicity can be assayed with this protocol.
02:37
Microscopic Imaging of Neurons in a Mouse Brain Section Using Golgi-Cox Metallic Staining
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2025
Source: Louth, E. L., et al. Imaging neurons within thick brain sections using the Golgi-Cox method. J. Vis. Exp. (2017)This video demonstrates imaging neurons in a Golgi-Cox stained thick brain section by setting upper and lower focus boundaries and capturing overlapping images. Multiple locations are imaged to ensure detailed neuronal projections, which are combined to create a 3D representation.
FAQs
Electron-dense metals scatter electrons more strongly than the surrounding biological material. When osmium, uranyl compounds, or lead salts bind to or react with cellular components, those regions become more detectable during electron microscopy. Differences in electron scattering then produce contrast in the micrograph, allowing fine structures that would otherwise remain transparent to be distinguished at high resolution.
Osmium, uranyl compounds, and lead salts serve as electron-dense staining reagents, while fixatives help prepare cellular material for imaging. Their interactions with specimen components increase electron scattering and improve structural visibility. Because the overview does not assign each reagent to a single neural target, their shared importance is the contrast they provide for examining cellular organization.
The same contrast-producing principle supports both transmission and scanning electron microscopy, but the resulting micrographs serve different imaging arrangements. In transmission electron microscopy, electron scattering contributes to the visibility of structures within a section, whereas scanning electron microscopy records contrast from the specimen surface. This distinction helps determine how cellular architecture is examined.
Neuronal membranes, synapses, myelin, and organelles are extremely small structures whose organization cannot be adequately assessed from transparent, low-contrast material alone. Enhanced electron scattering makes these features visible at the ultrastructural level. That added detail allows neuroscience studies to examine how cellular architecture relates to neural connectivity, injury, and disease mechanisms.
The preparation uses biological specimens together with fixatives and electron-dense reagents such as osmium, uranyl compounds, or lead salts. Fixatives and stains work as complementary components: preparation preserves the cellular material, while the metals increase its electron contrast. The treated specimen can then be examined through transmission or scanning electron microscopy, depending on the imaging goal.
In neuroscience applications, the method supports examination of neuronal membranes, synapses, myelin, and organelles. These structures represent distinct aspects of neural organization, including cellular boundaries, points of neuronal communication, insulating material, and internal compartments. Visualizing them together helps investigators assess fine architecture rather than relying only on broader cellular or tissue-level features.
By making cellular details visible at high resolution, the approach allows researchers to inspect pathological changes in neural tissue. Observations of membranes, synapses, myelin, or organelles can be related to altered connectivity or cellular injury. The resulting micrographs therefore provide structural evidence that can contribute to investigations of disease mechanisms, although interpretation depends on the specific specimen and study design.
These micrographs provide ultrastructural information about the organization and condition of neural cells. Researchers can use the visible arrangement of membranes, synapses, myelin, and organelles to examine neural connectivity and identify cellular changes associated with injury or disease. The value of the images lies in linking high-resolution structural observations with broader questions about neural function and pathology.