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Difference equation

Difference equation

(Science: epidemiology) The mathematical formulation corresponding to a discrete time model.


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Re: beer-lambert law

... * mol^-1 * cm^-1 = M^-1 * cm^-1) and applying this in the Beer-Lambert equation will give units of molarity (M): C = absorbtion /(epsilon x l) with ... cm^-1)*cm) = M Since you have readings 1 minute apart, you can take the difference in the concentrations (M) and the difference will be in M/min. ...

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by jonmoulton
Fri Feb 27, 2009 4:53 pm
 
Forum: General Discussion
Topic: beer-lambert law
Replies: 4
Views: 659

DUMAS METHOD OF DETERMINING MOLAR MASS OF A VOLATILE LIQUID

... do. If you're converting it into a gas, then methanol decays per this equation: 2CH3OH -> 2CH4 + O2 As you can see, two moles of methanol produces ... the flask before and after adding the methanol, and subtracting the difference) by the number of moles that you calculated, and you should have ...

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by alextemplet
Mon Oct 20, 2008 9:54 pm
 
Forum: General Discussion
Topic: DUMAS METHOD OF DETERMINING MOLAR MASS OF A VOLATILE LIQUID
Replies: 11
Views: 3696

Re: Brain size=IQ level theory (Blacks vs Whites & Asians)

... Bell Curve controversy and the reality of g, (5) race/sex/social class differences in brain size and IQ, (6) Cesare Lombroso and the genetic basis ... (in billions)= 5.583 + 0.006 (cm3 brain volume). According to this equation, a person with a brain size of 1,400 cm3 has, on average, 600 million ...

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by TJJ
Fri May 16, 2008 12:13 am
 
Forum: Human Biology
Topic: Brain size=IQ level theory (Blacks vs Whites & Asians)
Replies: 18
Views: 9912

Re: SOS...please help, Na+/H+ pump problem

... K Vm=-70mV or -0.07V Faraday=23063 cal/mol-volt using nernst equation Ev=(RTln[Xout]/[Xin])/F you have: -70=(1.987*310*ln(145/[Nain])/23063 ... be larger than the one you allready have (i mean [Na+]in=12mM). The difference between the value you calculated and the one i just refered is ...

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by rui_benfeitas
Sat Jan 26, 2008 12:31 am
 
Forum: Cell Biology
Topic: SOS...please help, Na+/H+ pump problem
Replies: 1
Views: 809

Activation Energy and Enzyme Catalysis

... be predicted, but must be calculated after experimentation. When this equation is taken as a whole, it means that reaction rate is equal to the ... 3) The top of a potential energy profile is the transition state. The difference between the potential energy of the activated complex and the ...

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by roark
Sun Feb 25, 2007 9:58 am
 
Forum: Molecular Biology
Topic: Activation Energy and Enzyme Catalysis
Replies: 0
Views: 1696
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