repeating unit

[ri¦pēd·iŋ ‚yü·nət]

(organic chemistry)

The group of atoms that is derived from a monomer and repeats throughout a polymer. Also known as monomeric unit.

References in periodicals archive ?

5), where the repeating unit contains two carbon atoms and four hydrogen atoms, the molecular weight is 28n, where n represents the number of repeating segments.

Plastics--it's all about molecular structure

Figure 1 shows the chemistry for the repeating unit of what is generically referred to as a silicone polymer.

Analyzing filler content: the process is considered simple. But things aren't always as they seem

The mass increment of the repeating unit is 74 Da, and corresponds to a fragment of glycerine.

Hyperbranched polyglycerol as an additive for water-based printing ink

We started the modeling with 100 cellulose chains, and in each chain, there is one repeating unit (cellobiose) and one water molecule.

Interaction effects between cellulose and water in nanocrystalline and amorphous regions: a novel approach using molecular modeling

It was conjectured that placing the single element at the end of the repeat would help students to identity the repeating unit. Each form was administered to 10 randomly chosen boys and girls selected evenly from Year 1 and Year 2.

Repeating patterns: strategies to assist young students to generalise the mathematical structure

I've combined these texts according to this repeating unit of BPA.

Chemical bard: poet Adam Dickinson explores how chemicals interact with our bodies and our culture

Using the repeating unit geometry of each stent design, solid models were generated [Fig 1,2,3,4].

Finite element analysis of the mechanical performance of aortic valve stent designs

In developing the 2D model the following procedure was used: Consider the stent structure as having a radius r, the repeating unit subtends an angle[phi], equal to 360/nrep, where nrep represents the number of the repeating units in the circumferential direction.

FEM analyze for an arterial implant device

The repeating unit of this type of fibre is the amide link (Fig 5), where R is a side chain of one of the twenty different naturally-occurring amino acids that proteins are derived from.

Dyes, fabrics and the triple dye experiment

For example, [DELTA] O is a repeating unit or element of a pattern containing [DELTA] O [DELTA] O [DELTA] O.

Promoting repeating patterns with young children--more than just alternating colours! Marina Papic explains how experiences in the early years of schooling should focus on identifying, justifying and transferring various patterns using a variety of materials if a sound understanding of patterning is to develop in students

rotated about the wedge's point at 4 different angles,' subsequently rotated 180 degrees as a block to form a repeating unit. The Crystals pattern he described as being more random and apparently made up of triangles and four-sided polygons but he indicated that he could not determine a regular geometric pattern.

US court accepts holo-copyright arguments in Spectratek/3D patterns case

They are molecules that contain a repeating unit in them, characterized by high molecular weight.