Microcapsule Synthesis
Microcapsule Synthesis - Related Videos
02:52
Synthesis of Metal Oxide Microcapsules Using Metal-Reducing Bacteria
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2025
Source: Lin, P., et al. Synthesizing Sodium Tungstate and Sodium Molybdate Microcapsules via Bacterial Mineral Excretion. J. Vis. Exp. (2018).This video demonstrates the procedure for synthesizing rigid metal oxide microcapsules by culturing metal-reducing bacteria with metal ions, followed by sequential purification through sonication, centrifugation, and ethanol washing.
08:33
Hydrogel Synthesis
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2023
Source: Amber N. Barron, Ashlea Patterson, and Taylor D. Sparks, Department of Materials Science and Engineering, The University of Utah, Salt Lake City, UT Hydrogels are a versatile class of cross-linked polymers produced through relatively simple procedures and with generally inexpensive materials. They can be formed from solution and involve a polymer backbone formed from monomer reagents, an initiator which makes the polymer reactive and a crosslinking species which binds the polymer chains...
09:42
Solid Phase Synthesis
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2023
Source: Vy M. Dong and Diane Le, Department of Chemistry, University of California, Irvine, CA Merrifield's solid-phase synthesis is a Nobel Prize winning invention where a reactant molecule is bound on a solid support and undergoes successive chemical reactions to form a desired compound. When the molecules are bound to a solid support, excess reagents and byproducts can be removed by washing away the impurities, while the target compound remains bound to the resin. Specifically, we will...
02:17
Synthesis and Decomposition Reactions
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2020
Synthesis and decomposition are two types of redox reactions. Synthesis means to make something, whereas decomposition means to break something. The reactions are accompanied by chemical and energy changes. Synthesis Reactions Synthesis reactions are also called combination reactions. It is a reaction in which two or more substances combine to form a complex substance. Synthesis reactions are generally represented as: A + B → AB or A + B → C. The formation of nitrogen dioxide is a synthesis...
02:36
Transfer RNA Synthesis
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2020
One of the unique features of tRNA is the presence of modified bases. In some tRNAs, modified bases account for nearly 20% of the total bases in the molecule. Altogether, these unusual bases protect the tRNA from enzymatic degradation by RNases. Each of these chemical modifications is carried by a specific enzyme, post-transcription. All of these enzymes have unique base and site-specificity. Methylation, the most common chemical modification, is carried by at least nine different enzymes, with...
FAQs
Emulsification disperses the core material into another phase, creating droplets that determine the initial capsule dimensions. A membrane can then form at the droplet interface through polymerization, cross-linking, or solvent removal. Because the shell develops around the dispersed material, emulsification provides an important basis for controlling capsule size and producing compartments suitable for biological payloads.
These approaches create the surrounding membrane through different formation mechanisms. Interfacial polymerization builds material at the boundary between phases, whereas ionic or chemical cross-linking stabilizes components by forming connections within the shell material. Solvent removal produces the membrane as solvent leaves the system. The selected route influences the resulting wall and its permeability.
Reaction conditions are central to the physical properties of the finished capsules. In the provided synthesis framework, they influence how large the capsules become, how thick their walls are, and how readily substances pass through those walls. These variables matter because they determine how effectively a capsule protects its payload and regulates interactions with the surrounding environment.
Compartmentalization separates cells, enzymes, drugs, or other biomolecules from the surrounding environment while keeping them within a defined space. The shell can provide protection and support localized delivery or controlled release. For biology research, this creates a way to study or use sensitive payloads under conditions where their exposure and distribution can be managed.
A general workflow begins by dispersing the selected core material through emulsification. The membrane is then formed around the dispersed phase using interfacial polymerization, ionic or chemical cross-linking, or solvent removal. Finally, the resulting capsules are considered in terms of size, wall thickness, and permeability, since these properties determine their suitability for the intended biological use.
Researchers may choose this approach when a biological payload needs protection, compartmentalization, controlled release, or localized delivery. The overview identifies applications involving cells, enzymes, drugs, and biomolecules, as well as drug delivery, cell encapsulation, tissue engineering, and biocatalysis. The method is therefore relevant when spatial control and environmental separation are important experimental goals.
In drug delivery, capsules can support localized delivery and controlled release. For cell encapsulation and tissue engineering, they can provide a defined compartment around biological material. In biocatalysis, enclosing enzymes or related biomolecules can help protect them from the surrounding environment. Across these applications, performance depends on the capsule properties established during synthesis.