closest packing

(noun)

A phenomenon resulting in the crystal structure of atoms/molecules having their component parts as near to each other as possible.

Related Terms

Examples of closest packing in the following topics:

  • Crystal Structure: Closest Packing

    • Closest packing refers to the most efficient way to arrange atoms in a crystalline unit cells.
    • The most efficient conformation of atomic spheres within a unit cell is known as the closest packing formation.
    • Because the third layer is aligned the same way as the first, this configuration is referred to as "ABA" and results in hexagonal closest packing (HCP).
    • This configuration is referred to as "ABC" and results in cubic closest packing (CCP).
    • Two methods of packing spheres into a unit cell yield the most common closest packing conformations: CCP and HCP.

  • Eukaryotic Chromosomal Structure and Compaction

    • Chromosomes must coil to pack DNA into the cell during cell division, a process involving 3 levels of compaction.
    • In the third level of packing, a variety of fibrous proteins is used to pack the chromatin.
    • When fully compact, the pairs of identically-packed chromosomes are bound to each other by cohesin proteins.
    • The connection between the sister chromatids is closest in a region called the centromere.

  • Carbohydrate Molecules

    • Every other glucose monomer in cellulose is flipped over, and the monomers are packed tightly as extended long chains.
    • By convention, the carbon atoms in a monosaccharide are numbered from the terminal carbon closest to the carbonyl group.

  • Crystal Structure: Packing Spheres

    • These spheres are packed into unit cells.

  • Charales

    • Algae in the order Charales live in fresh water and are often considered the closest-living relatives of embryophytes.
    • Green algae in the order Charales, and the coleochaetes, microscopic green algae that enclose their spores in sporopollenin, are considered the closest-living relatives of embryophytes.

  • Brønsted Acid Additions

    • Of all the reagents discussed here, these strong acid additions (E = H in the following equation) come closest to proceeding by the proposed two-step mechanism in which a discrete carbocation intermediate is generated in the first step.

  • Court Packing

    • The Judicial Procedures Reform Bill of 1937, commonly referred to as "the court-packing plan," was proposed by FDR to gain political control over the US Supreme Court.
    • Political opponents referred to Roosevelt's proposal as "the court-packing plan."
    • In February 1937, Roosevelt introduced the Judicial Procedures Reform Bill, frequently called the "court-packing plan."
    • While Burton Wheeler, a progressive Democrat from Montana, played the role of the public voice of the alliance that formed in opposition to "the court-packing  plan," conservative Democratic senators, Carter Glass, Harry Flood Byrd, and Josiah Bailey, were critical to collecting enough opposing votes in Congress.
    • Despite the failure of Roosevelt's plan, "the court-packing plan" controversy coincided with and was followed by changes that helped the President gain much more control over the Supreme Court.

  • Successful Implementation of CSR and Sustainable Development

    • The technology utilizes 100 per cent of the residuals of tetra pack carton packages to obtain the material that can be used in the production of roofs and chipboards.
    • With this technology, Tetra Pack has built 24 houses for low-income families to date.
    • As evidenced in the case of Tetra Pack Colombia, a company with CSR and sustainable development aligned into its strategy can be effective in working with its community to solve a social problem.
    • In this case, Tetra Pack Colombia was able to utilize waste that impacted the environment; worked with the government to coordinate efforts to improve the welfare and the quality of life of its community; worked with companies in the community to develop knowledge and new technologies; and create new jobs and alternative, environmentally friendly new sources of material.

  • Other Inputs to Pricing Decisions

    • EVC is based on the insight that a customer will buy a product only if its value to them outweighs the value of the closest alternative.
    • This suggests that the differentiation value relative to the closest competitive offering is $6,000.

  • Properties of Alkenes

    • The melting and boiling points of alkenes are determined by the regularity of the packing, or the closeness, of these molecules.
    • Alkene isomers that can achieve more regular packing have higher melting and boiling points than molecules with the same molecular formula but weaker dispersion forces.