What is freely jointed chain model?
From Wikipedia, the free encyclopedia. In polymer chemistry, an ideal chain (or freely-jointed chain) is the simplest model to describe polymers, such as nucleic acids and proteins. It only assumes a polymer as a random walk and neglects any kind of interactions among monomers.
What is a Gaussian chain?
1 The Gaussian Chain. Polymers are long-stretched chain molecules whose subunits, named monomers, are themselves molecules. These long molecules can have various architectures, a simple example is a linear alkane shown in Figure 1.
How is Kuhn length measured?
The typical length of a Kuhn segment (persistence length) of DNA is 50 nm (15 * 0.34 nm), so to find the approximate number of Kuhn segments (NK) for a given piece of DNA, we take the length of the DNA (L) and divide it by twice the persistence length (Lp), i.e. NK = L/2Lp.
Are all polymers carbon based?
Most polymer chains have a string of carbon atoms as a backbone. A single macromolecule can consist of hundreds of thousands of monomers, according to the Polymer Science Learning Center.
Do random coils have hydrogen bonds?
Random Coil Some regions of the protein chain do not form regular secondary structure and are not characterized by any regular hydrogen bonding pattern.
How do you calculate the length of a polymer chain?
To get the chain contour length, divide MW of the polymer by the MW of the monomer unit and multiply by the length of the monomer unit.
What is characteristic ratio?
The characteristic ratio, Cn, is the ratio of observed end-to-end distance, and the end-to-end. distance of a freely jointed chain composed of n bonds of step length lchem, Cn = r2. 0.
What are monomers and MERS?
“Mer” originates from the Greek word “meros,” which means a part. The word polymer derives its meaning from this, which means “many mers.” A repeat unit (or mer), is not to be confused with the term monomer, which refers to the small molecule from which a polymer is synthesized.