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Polymer

Definition

noun, plural: polymers

(1) A compound made up of several repeating units (monomers) or protomers.

(2) The product of polymerization.


Supplement

Polymers are made from monomers linked by chemical bonds. They are produced by polymerization, and occur either naturally or synthetically.

Examples of natural polymers are cellulose, shellac and amber. Biopolymers such as proteins and nucleic acids play crucial roles in biological processes.

Common synthetic polymers are Bakelite, neoprene, nylon, PVC (polyvinyl chloride), polystyrene, polyacrylonitrile and PVB (polyvinyl butyral).


Word origin: Greek polumerēs, consisting of many parts : polu-, poly- + meros, part.

Related forms: polymeric (adjective). Derived terms: biopolymer, copolymer.

Compare: monomer.


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PLGA scaffold problem

... additional note this chemical is insoluble in ethanol and isopropanol. Thus, is there any suggestion for the fabrication of the scaffold with PLGA polymer. Thanks,

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by Yeditepe
Sun Aug 12, 2012 5:03 pm
 
Forum: Cell Biology
Topic: PLGA scaffold problem
Replies: 0
Views: 1869

tRNA

Just to make it crystal clear, the proteins are polymers of amino acids, the RNA is polymer of other monomers ;) As canalon said, they have different function, but also different size and shape ;)

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by JackBean
Wed Nov 16, 2011 4:45 pm
 
Forum: Molecular Biology
Topic: tRNA
Replies: 5
Views: 6332

Re: Relationship between structure and function of glucoes

... any 1-6 bonds these cause branching -- these branches are common in starch. I wrote "Galactose is pure 1-4 α-bound glucose while starch is a polymer of the pure 1-4 β form" Oops. That should have been: Starch is pure 1-4 α-bound glucose while cellulose is a polymer of the pure 1-4 β ...

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by jonmoulton
Tue Sep 13, 2011 7:44 pm
 
Forum: Molecular Biology
Topic: Relationship between structure and function of glucoes
Replies: 12
Views: 14905

Relationship between structure and function of glucoes

... Starch is a poly-α-D-glucose. Cellulose is a poly-β-D-glucose. Am I correct? I am do not understand why you said that "starch is a polymer of pure 1-4 β form". I understand that you mean the 1-4 glycosidic linkages are formed from the β form of glucose, but isn't that the α ...

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by Adz795
Tue Sep 13, 2011 5:16 pm
 
Forum: Molecular Biology
Topic: Relationship between structure and function of glucoes
Replies: 12
Views: 14905

Re: Relationship between structure and function of glucoes

... D-glucose is a mixture of α and β forms and they are dynamically interconverting though the free aldehyde form. When the glucose is bound into a polymer, this locks the position of the ring-closing bond into either the α or β form. Galactose is pure 1-4 α-bound glucose while starch is a polymer ...

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by jonmoulton
Tue Sep 13, 2011 3:48 pm
 
Forum: Molecular Biology
Topic: Relationship between structure and function of glucoes
Replies: 12
Views: 14905
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