Crystalline Domains
Crystalline Domains - 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...
02:26
Conservation of Protein Domains Over Different Proteins
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2020
Protein domains are small structurally independent units that are part of a single amino acid chain. Although these domains are often structurally independent, they may rely on synergistic effects to perform their functions as part of a larger protein. Protein domains may be conserved within the same organism, as well as across different organisms. A limited set of protein domains often duplicate and recombine during evolution. These domains can be organized in different combinations to form...
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.
01:21
Three-Domain System of Life
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2025
Ribosomal RNA (rRNA) sequence analysis revealed three distinct groups of cells: eukaryotes, bacteria, and archaea. In 1978, Carl R. Woese proposed the concept of domains, a taxonomic level above kingdoms, to differentiate these groups. He suggested that archaea and bacteria, despite their similar appearance, represent separate domains. Domains differ in rRNA, membrane lipid structure, transfer RNA, and antibiotic sensitivity.In this classification, animals, plants, and fungi belong to the...
01:29
Three Developmental Domains
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2025
Human development is typically examined across three main domains: physical, cognitive, and socio-emotional. These domains represent the significant areas of change and continuity throughout the lifespan, from infancy to late adulthood. Physical Development Physical processes, also known as maturation, encompass the biological changes that occur across an individual's life. These changes begin with genetic inheritance and continue through various stages, including growth in height and weight,...
FAQs
Nucleation establishes initial organized regions, while subsequent growth expands those regions as molecular units continue to arrange within a lattice. The balance between these stages influences the resulting domain structure. Examining whether crystallization favors many initial regions or more extensive growth helps explain differences in domain size and the resulting material properties.
Cooling, solvent removal, and chemical reaction are identified as conditions that can drive crystallization. Each changes the environment in which atoms, ions, or molecules organize, allowing ordered regions to develop. Comparing these conditions helps chemists relate the route of crystallization to differences in molecular packing, phase behavior, and the structure ultimately obtained.
The size, orientation, and distribution of crystalline domains influence how a material behaves. These structural features are associated with differences in mechanical strength, thermal stability, solubility, and optical behavior. Consequently, two materials with crystalline regions can show different properties when their domains are arranged differently, even though crystallization has occurred in both.
Their ordered arrangement provides a structural basis for examining how molecules pack within a solid and how that organization relates to phase behavior. In chemistry, this connection links microscopic structure with observable material characteristics. Studying the domains therefore helps clarify why changes in organization can accompany changes in stability, solubility, or other physical properties.
Analysis should consider the domains' size, orientation, and distribution, then relate those features to the material's physical behavior. This approach can be used to investigate mechanical strength, thermal stability, solubility, and optical properties. It also supports interpretation of how crystallization conditions and molecular packing contribute to the observed structure.
Crystalline domains are relevant in polymers, pharmaceuticals, minerals, and advanced nanostructures. In each case, their organization can help explain important structure-property relationships, including mechanical, thermal, solubility, or optical behavior. Their study therefore connects crystallization and molecular packing with both conventional chemical materials and more specialized nanoscale systems.
Researchers can compare materials by examining how domain size, orientation, and distribution correspond to differences in their properties. Such comparisons are useful across polymers, pharmaceuticals, minerals, and advanced nanostructures, where ordered regions may be produced under different crystallization conditions. The resulting structural perspective helps distinguish property changes associated with packing and phase behavior.