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Coefficient

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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Optical density Q

... measured at 400nm. in a 1cm glass cuvette. The solution had been prepared by dissolving 35mg of X in 50 ml of water. What is the molar extinction coefficient of X at 400nm? (mol. wt. of X is 450) (20% of the marks) (ii) Measurements of lactate dehydrogenase (LDH) activity were carried out on plasma ...

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by monkey07
Mon Jun 01, 2009 4:34 pm
 
Forum: Molecular Biology
Topic: Optical density Q
Replies: 0
Views: 415

Molar Extinction Coefficient Trouble!

nothing. ignore it. A=EbC where E is molar extinction coefficient, b is the path of light in cm, and C is concentration

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by alexandertg6
Wed Apr 22, 2009 12:31 pm
 
Forum: Molecular Biology
Topic: Molar Extinction Coefficient Trouble!
Replies: 1
Views: 297

Molar Extinction Coefficient Trouble!

I have a graph of absorbance against concentrations of BCG dye at 614 nm. I have been asked to estimate the molar extinction coefficient for BCG from the graph and show how my value was calculated. The Molecular weight values for BCG is 698. I simply do not know where to start! So far: ...

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by sophi3nutt
Tue Apr 21, 2009 11:38 am
 
Forum: Molecular Biology
Topic: Molar Extinction Coefficient Trouble!
Replies: 1
Views: 297

alpha napthol

hi please anybody can help to know me the epslon coefficient or molar absorption coefficient for alpha naphthol.

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by peteranil
Mon Mar 30, 2009 5:32 pm
 
Forum: Molecular Biology
Topic: enzyme question
Replies: 3
Views: 483

Re: Molar Extinction Coefficient

So if I have this data: Absorbance @ 405nm: .875 Concentration (M) of Cr(NO3)3 (aq): .25M Since you're saying that if l = 1cm (standard curvette), then E = A/C so then: .875/.25 = E E = 3.5?

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by r6barfly
Thu Mar 19, 2009 5:21 am
 
Forum: Molecular Biology
Topic: Molar Extinction Coefficient
Replies: 4
Views: 15882
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