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Dictionary » P » Polar

Polar

Definition

adjective

(general) Of, or having one or more poles (in a spherical body); being in opposite extremes.

(chemistry) Pertaining to a compound exhibiting polarity or dipole moment, that is a compound bearing a partial positive charge on one side and a partial negative charge on the other.

(mathematics) Of a coordinate system, specifying the location of a point in a plane by using a radius and an angle.

(pathology) Characterized by having opposite ends of a spectrum of symptoms or manifestations, as in polar types of leprosy


Supplement

Sugar, such as sucrose, is an example of polar molecule. Its structure has oxygen-hydrogen (-OH) groups.

Water is also a polar molecule for having both negative and positive poles.


Word origin: from Late Latin polāris.

Related forms: polarity (noun).
Related terms:

Compare: nonpolar.
See also: polar solvents.


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Enzymes and activation energy.

... a reaction but rather it speeds up a reaction by altering the electrostatic character of the substrate molecule, by utilizing its charged or non polar side chains. This in turn increases the rate of reactivity of the substrate and stabilizes the transition state. New to biology

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by NewtoBiology
Wed Jul 08, 2009 2:09 am
 
Forum: Molecular Biology
Topic: Enzymes and activation energy.
Replies: 4
Views: 380

Re: Any SOLID arguments against evolution?

... The point is that even if you took the 287 amino acids and tried to combine them without guidance the odds of getting it right so that the polar bonds caused the secondary and tertiary Arranging these 287 amino acids through randomness in 1000 years seems quite unlikely, 10,000 years - ...

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by futurezoologist
Tue Jun 02, 2009 9:45 am
 
Forum: Evolution
Topic: Any SOLID arguments against evolution?
Replies: 106
Views: 16654

Re: Any SOLID arguments against evolution?

... This is a hypothetical illustration. I realize that when you change the sequence you may have breaks or secondary bonding through London or polar forces. i understand your points Alex and FZ, but those consequences are only in FAVOR of the design argument.

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by AFJ
Tue Jun 02, 2009 1:25 am
 
Forum: Evolution
Topic: Any SOLID arguments against evolution?
Replies: 106
Views: 16654

Re: Any SOLID arguments against evolution?

... in regards to hemoglobin A vast number of ways yes, but i think that you think it is much more than it is, you haven't taken into account polar bonds(of which there are a lot in hemoglobin due to H, N, O), the stress put on any random structure from this imbalance alone would cancel at ...

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by AFJ
Tue Jun 02, 2009 1:19 am
 
Forum: Evolution
Topic: Any SOLID arguments against evolution?
Replies: 106
Views: 16654

Re: Any SOLID arguments against evolution?

A vast number of ways yes, but i think that you think it is much more than it is, you haven't taken into account polar bonds(of which there are a lot in hemoglobin due to H, N, O), the stress put on any random structure from this imbalance alone would cancel at least half of the ...

See entire post
by AFJ
Mon Jun 01, 2009 1:23 am
 
Forum: Evolution
Topic: Any SOLID arguments against evolution?
Replies: 106
Views: 16654
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