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Dictionary » C » Coefficients

Coefficients

Coefficient

1. The expression of the amount or degree of any quality possessed by a substance, or of the degree of physical or chemical change normally occurring in that substance under stated conditions.

2. The ratio or factor that relates a quantity observed under one set of conditions to that observed under standard conditions, usually when all variables are either 1 or a simple power of 10.

Origin: L. Co-_ efficio (exfacio), to accomplish


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heritability of Z-linked trait

... male grandoffspring regression For traits codified by genes located in the autosomes, I know that I would have to multiply the regression coefficients by 4 in each one of both regressions. But, were the traits I am interested be located in the Z chromosome, What would be the coefficients ...

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by Tweedy
Thu Jul 09, 2009 7:50 am
 
Forum: Genetics
Topic: heritability of Z-linked trait
Replies: 2
Views: 136

Lotka-Volterra Models

... of information that is very confusingly written, and I can not seem to find out some other source to help. Specifically I am talking about the coefficients of competition. This is what they say for alpha as an example: "If individuals of species 2 have less effect on an individual of species ...

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by BioCore
Mon Nov 10, 2008 5:08 pm
 
Forum: Ecology
Topic: Lotka-Volterra Models
Replies: 4
Views: 1174

Combining extinction coefficients?

... The absobance at each wavelength is the sum of the absorbance (not the extinctions) of the components at each wavelength, but the extinction coefficients (more properly, molar absorptivities) don't add. You have to solve a set of simultaneous equations for the concentrations of the components. ...

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by blcr11
Wed Sep 19, 2007 4:20 pm
 
Forum: Molecular Biology
Topic: Combining extinction coefficients?
Replies: 4
Views: 1881

Combining extinction coefficients?

This was a problem I ran into in my Biochem lab, I solved it by combining the extinction coefficients but I've never seen that done before. Does this method work or am I way off? A solution containing NAD+ and NADH has an optical density in a 1 cm cuvette of 0.311 at ...

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by dae
Tue Sep 18, 2007 9:25 pm
 
Forum: Molecular Biology
Topic: Combining extinction coefficients?
Replies: 4
Views: 1881

spectrum of riboflavin

... the absorptivity at the particular wavelength. There are "standard" absorptivities assumed for DNA or protein (often called extinction coefficients)--see the above link. Many molecules absorb strongly in the 150-210nm region--notably, peptide bonds at 190nm. It may be possible to estimate ...

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by blcr11
Sat Apr 14, 2007 4:01 pm
 
Forum: Cell Biology
Topic: spectrum of riboflavin
Replies: 5
Views: 1366
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