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Quadratic

quadratic

1. Of or pertaining to a square, or to squares; resembling a quadrate, or square; square.

2. (Science: chemistry) tetragonal.

3. (Science: mathematics) Pertaining to terms of the second degree; as, a quadratic equation, in which the highest power of the unknown quantity is a square.

Origin: Cf. F. Quadratique.


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Negative concentration??

Not necceserilly, e.g. we are using quadratic fit for Bradford determination of protein concentration instead of linear

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by JackBean
Fri Oct 30, 2009 4:04 am
 
Forum: Molecular Biology
Topic: Negative concentration??
Replies: 8
Views: 7257

Negative concentration??

... shouldn't be trying to see what fits better. The model you use should reflect the physical of the system, i.e. light absorbance is linear and not quadratic or logarithmic no matter how good the line fits.

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by mith
Thu Oct 29, 2009 4:57 pm
 
Forum: Molecular Biology
Topic: Negative concentration??
Replies: 8
Views: 7257

Free drug concentration

... 3319.246 x 10^-15 moles/l (Molecular weight of drug - 337.41 g/mole) Dissociation constant = 0.27 nM, How to calculate the free protein, Above is quadratic equaltion, As the unit dissociation constant of drug is in nM, while that of total protein and total drug is in different units, How to calculate ...

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by carbonp
Sun Oct 25, 2009 1:20 pm
 
Forum: Molecular Biology
Topic: Free drug concentration
Replies: 3
Views: 2376

Line/Curve of Best Fit?

As it stands, the data looks either linear, quadratic, or sigmoidal/hyperbolic. But "here's a bet I'll bet youse" to steal a line from E. E. Cummings. I bet there is a mistake in the data points at pH 10 and 12. To check that, unfortunately, ...

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by blcr11
Thu Sep 11, 2008 10:59 pm
 
Forum: General Discussion
Topic: Line/Curve of Best Fit?
Replies: 7
Views: 27844

Please Help! Question with plant use of CO2 and Statistics..

... a line through the data, other than to prove statistically that the slope cannot be distinguished from zero. If the trend is not linear--say it's quadratic, or multivariate--a simple univariate linear model isn't adequate; a univariate linear model may still be statistically significant, but the ...

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by blcr11
Fri Apr 13, 2007 1:58 pm
 
Forum: Botany Discussion
Topic: Please Help! Question with plant use of CO2 and Statistics..
Replies: 2
Views: 2141


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