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Question: 6 4 frictional drag coefficient of molecules depends on their...

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3. 6,4, Frictional drag coefficient of molecules depends on their shape as shown in Table 6.3 below. Estimate the diffusion coefficient of fibrinogen, assuming that it is (a) A prolate ellipsoid with major axis (a) of 70 nm and a minor axis (b) of 4 mm. (b) A cylindrical rod. 2 with length (L of 47.5 nm and diameter (a) of 6.5 nm What shape is a more accurate model of the shape of fibrinogen? TABLE 6.3 values of the Mean Frictional Drag coefficlent for Different shapes [9,10] Shape Frictional drag coefficient sphere of radius R Prolate ellipsoid, p alb 1, where 1)1/2 a is a major axis, b is a minor axis nip (p 6mub(1 2 1/2 Oblate ellipsoid, p m alb 1 p tan 11 Thin circular disk of radius a 16ua 4THL. Cylinder of radius a and length L In (L/a) 0.193 Source: From Refs 19, 1
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