Crystalline Suspensions
Crystalline Suspensions - Related Videos
01:21
Polymer Classification: Crystallinity
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2023
Unlike ionic or small covalent molecules, polymers do not form crystalline solids due to the diffusion limitations of their long-chain structures. However, polymers contain microscopic crystalline domains separated by amorphous domains. Crystalline domains are the regions where polymer chains are aligned in an orderly manner and held together in proximity by intermolecular forces. For example, chains in the crystalline domains of polyethylene and nylon are bound together by van der Waals...
10:17
The Tail Suspension Test
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Cited by 534 •
2012
The tail-suspension test is validated as an experimental procedure to assess antidepressant efficacy of drug treatments in mice. Mice are suspended by their tails for six minutes and escape-related behaviors are assessed. We describe procedures used in conducting the tail suspension test.
11:17
Synthesis of Programmable Main-chain Liquid-crystalline Elastomers Using a Two-stage Thiol-acrylate Reaction
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Cited by 107 •
2016
A novel methodology is presented to synthesize and program main-chain liquid-crystalline elastomers using commercially available starting monomers. A wide range of thermomechanical properties was tailored by adjusting the amount of crosslinker, while the actuation performance was dependent on the amount of applied strain during programming.
04:16
ECM Suspension Preparation: A Technique to Obtain Homogenous Suspension from Tissue-derived Extracellular Matrix
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2023
This video describes the preparation of a homogenized and digested extracellular matrix suspension from decellularized and lyophilized tissues. This technique helps in fabricating ECM-derived porous foams and microcarriers for use as substrates in advanced 3D cell culture models.
01:17
Colloids and Suspensions
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2023
Children at play often make suspensions such as mixtures of mud and water, flour and water, or a suspension of solid pigments in water known as tempera paint. These suspensions are heterogeneous mixtures composed of relatively large particles visible to the naked eye or seen with a magnifying glass. They are cloudy, and the suspended particles settle out after mixing. The suspended particles in a suspension settle out after some time of mixing. The separation of particles from a suspension is...
FAQs
Supersaturation drives the formation of crystal nuclei, while continued growth determines how those nuclei develop into larger particles. The balance between these stages affects the resulting particle population and its behavior in the liquid. Studying this relationship helps chemists understand crystallization and adjust crystal formation when controlling particle properties is important.
Particle size, crystal shape, surface interactions, and fluid viscosity all affect how solids behave after crystallization. These factors influence whether particles remain distributed, settle, or associate into aggregates. Consequently, controlling them can improve solids distribution and help researchers evaluate the stability and handling characteristics of a crystalline suspension.
Sedimentation describes the downward movement of dispersed crystals, whereas aggregation involves particles associating with one another. Both processes can change the distribution of solids throughout the liquid and alter suspension stability. Examining these behaviors allows chemists to connect particle characteristics and liquid viscosity with the practical performance of the system.
Researchers can examine the formation of nuclei and the subsequent growth of crystals within a supersaturated solution. They can then relate particle size, shape, surface interactions, and viscosity to sedimentation, aggregation, and stability. This approach provides a way to study crystallization mechanisms while also identifying particle properties that may need control.
In pharmaceutical formulation and materials processing, the distribution and characteristics of crystalline solids can affect product quality, flow, and performance. These systems provide a setting for controlling particle properties and solids distribution rather than treating crystallization only as a separation step. The resulting control supports development and processing decisions in both fields.
Crystallization can produce solid particles from a solution, allowing crystalline suspensions to support the separation or purification of compounds. The resulting solids distribution and particle characteristics influence how the crystallized material behaves during processing. This makes the systems relevant to chemical workflows that depend on forming and managing crystals rather than keeping all compounds dissolved.