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Units

units

(Science: physics) standard quantities of measurement which are specific to a type of measurement, i.e. The metre is the standard unit of measurement for length in the mKS system of measurement. (see also sI unit, MKS, cGS)


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Cell wall extension- shearing units??

... and it's expansion (for an assignment which happens to be in tomorrow!) and have come across a term i cannot find the explanation for- shearing units . Any help would be greatly appreciated (even if past the deadline, i would still like to know). Here's the section of text; "Wall extension ...

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by MelJayne
Tue Jan 29, 2013 6:37 pm
 
Forum: Cell Biology
Topic: Cell wall extension- shearing units??
Replies: 0
Views: 236

Re: molar extinction coefficient

... done -- I promise that the next time you face this sort of graphical calculation, it will make more sense. And as you've found, it's all about the units.

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by jonmoulton
Tue Dec 04, 2012 4:22 pm
 
Forum: General Discussion
Topic: molar extinction coefficient
Replies: 10
Views: 1534

Re: molar extinction coefficient

... concentration on the X axis and absorbance on the Y axis, the slop is the molar extinction coefficient (assuming a 1cm path spectrometer cell and units of M^-1 cm^-1 for the extinction coefficient). okay...yes i've already done that...but hw wud i knw what the exact value fr the molar extin coeff/ ...

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by 2468
Wed Nov 28, 2012 8:54 pm
 
Forum: General Discussion
Topic: molar extinction coefficient
Replies: 10
Views: 1534

Re: molar extinction coefficient

... concentration on the X axis and absorbance on the Y axis, the slop is the molar extinction coefficient (assuming a 1cm path spectrometer cell and units of M^-1 cm^-1 for the extinction coefficient).

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by jonmoulton
Wed Nov 28, 2012 3:34 pm
 
Forum: General Discussion
Topic: molar extinction coefficient
Replies: 10
Views: 1534

Re: molar extinction coefficient

... so the intercept should be zero; that means from Y=mx+c for c=0 you only need Y=mx. For A=ecl, l=1cm and so except for its contribution to the units you can ignore it. That leaves you with A=ec, which is in the form Y=mx. As you vary the concentration the absorbance changes. The slope of their ...

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by 2468
Wed Nov 28, 2012 12:28 am
 
Forum: General Discussion
Topic: molar extinction coefficient
Replies: 10
Views: 1534
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