Lecture_22_2011_Nov_9 - Introduction to Biophysics Lecture...

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Introduction to Biophysics Lecture 22 Dissociation
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Why dissociation process is important for biology? Bio-molecules and biological membranes have charges as result of dissociation of ionizable groups. Those can change depending on the acidity of the environment.
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Ampholytes – substances which contain acids as well as basic groups. They are typical constituents of buffer solutions. Buffer solution is an aqueous solution consisting of a mixture of a weak acid and its conjugate base or a weak base and its conjugate acid. It has the property that the pH of the solution changes very little when a small amount of strong acid or base is added to it. Buffer solutions are used as a means of keeping pH at a nearly constant value in a wide variety of chemical applications. Many life forms thrive only in a relatively small pH range; an example of a buffer solution is blood.
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Titration curve for hemoglobin
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This note was uploaded on 12/09/2011 for the course PHYS 570 taught by Professor Staff during the Fall '08 term at Purdue University-West Lafayette.

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Lecture_22_2011_Nov_9 - Introduction to Biophysics Lecture...

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