Silastic Capsules
Silastic Capsules - Related Videos
05:24
Teratoma Generation in the Testis Capsule
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Cited by 25 •
2011
Human pluripotent stem cells (hPSCs) have the potential to treat a myriad of different diseases. The utility of these cells lies in the fact that they can differentiate into any cell type in the body. Here we describe the teratoma assay, which is used to demonstrate the pluripotence of hPSCs.
02:17
Separation of Bacteria by Capsule Amount Using a Discontinuous Density Gradient
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2025
Source: Feltwell, T., et.al. Separating Bacteria by Capsule Amount Using a Discontinuous Density Gradient. J. Vis. Exp. (2019)This video demonstrates the use of a discontinuous density gradient to separate bacterial strains based on capsule amount. By centrifuging a transposon mutant library through the gradient, bacteria with different capsule densities localize to distinct layers. The separated fractions can then be collected for downstream analysis.
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...
02:25
Culturing and Isolating Capsule-Forming Pathogenic Bacterial Strains
0 Views •
2025
Source: Feltwell, T., et.al. Separating Bacteria by Capsule Amount Using a Discontinuous Density Gradient. J. Vis. Exp. (2019)This video demonstrates the preparation and characterization of bacterial strains with varying capsule production. Pathogenic strains carrying different mutations in capsule-related genes are cultured, grown in liquid media, and subjected to centrifugation to distinguish capsule phenotypes based on pellet density. Buffer treatment is used to wash and stabilize the cells...
08:22
Utilization of Capsules for Negative Staining of Viral Samples within Biocontainment
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Cited by 3 •
2017
This protocol provides instruction for negative staining virus samples which can easily be used in BSL-2, -3, or -4 laboratories. It includes the use of an innovative processing capsule, which protects the transmission electron microscopy grid and provides the user easier handling in the more turbulent environments within biocontainment.
FAQs
Release depends on diffusion through the silicone elastomer wall rather than on repeated external dosing. Molecules move from the capsule’s more concentrated interior across the membrane and into adjacent tissue or fluid. This concentration-driven movement allows the capsule to act as a continuing source, so exposure can persist over an extended period instead of occurring only after separate administrations.
Three variables identified in the overview are membrane thickness, membrane surface area, and the properties of the substance inside. A thicker barrier can affect how readily molecules cross, while surface area changes the available pathway for diffusion. Molecular characteristics also matter, so two substances in otherwise similar capsules may not show identical release behavior.
Chemical stability helps the Silastic wall remain a dependable diffusion barrier while the capsule is used in a biological setting. Its flexibility is also relevant to an implant that must function in surrounding tissue. Together, these material characteristics support controlled exposure without requiring the substance to be administered repeatedly, which is important in longer experiments.
Researchers use these implants to deliver hormones, drugs, or other test compounds over time in experimental organisms. The approach can reduce repeated administration and provide a more sustained exposure. By maintaining delivery while the organism is observed, capsules help investigators examine treatment effects or physiological responses under longer-term experimental conditions.
The source identifies hormones, drugs, and other test compounds as substances that can be placed inside Silastic Capsules. Their release is then studied as the molecules move through the silicone membrane. This makes the system relevant when a biological experiment requires sustained exposure to a selected compound rather than repeated administration.
Because delivery continues over time, researchers can examine physiological responses under sustained exposure, evaluate long-term exposure, and assess controlled treatment effects in experimental organisms. The approach connects a defined release system with biological observations, allowing investigators to study how organisms respond when hormones, drugs, or other test compounds are provided over an extended period.