Engineering
Engineering, 30.03.2020 22:06, mxdv

Consider a porous tissue engineered matrix consisting of uniformly distributed sintered polymer microspheres, and space between the spheres is filled with a Newtonian solution. The microsphere diameter is 250 µm, and the microsphere density in the sintered matrix is 7.5 x 104 cm-3 .

(a) Determine the porosity ε of the material.

(b) The molecular radius of albumin is about 3 nm. Assume that there are no charge-charge interactions between albumin and the polymer. Estimate the partition coefficient β for albumin in the matrix. Is albumin diffusion hindered in the porous material relative to in solution?

(c) Suppose that you want to seed cells into the matrix to make a tissue graft. A typical human fibroblast in suspension is a sphere with diameter 10 µm. Estimate the partition coefficient β for cells in the porous material. Will cell flux through the material be hindered relative to flux in a homogeneous Newtonian fluid?

answer
Answers: 1

Other questions on the subject: Engineering

image
Engineering, 03.07.2019 15:10, theamandawhite
Ahouse has the following electrical appliance usage (1) single 40w lamp used for 4 hours per day (2) single 60w fan used for 12 hours per day (3) single 200w refrigerator that runs 24 hours per day with compressor run 12 hours and off 12 hours find the solar power inverter size in watt with correction factor of 1.25.
Answers: 1
image
Engineering, 04.07.2019 18:10, DestyHilBan1183
Adouble-strand no. 60 roller chain is used to transmit power between a 13-tooth driving sprocket rotating at 300 rev/min and a 52-tooth driven sprocket. a) what is the allowable horsepower of this drive? b) estimate the center-to-center distance if the chain length is 82 pitches. c) estimate the torque and bending force on the driving shaft by the chain if the actual horsepower transmitted is 30 percent less than the corrected (allowable) power.
Answers: 3
image
Engineering, 04.07.2019 18:10, michellerosas
Ajournal bearing has a journal diameter of 3.250 in with a unilateral tolerance of 20.003 in. the bushing bore has a diameter of 3.256 in and a unilateral tolerance of 0.004 in. the bushing is 2.8 in long and supports a 700-lbf load. the journal speed is 900 rev/min. find the minimum oil film thickness and the maximum film pressure for both sae 20 and sae 20w-30 lubricants, for the tightest assembly if the operating film temperature is 160°f. a computer code is appropriate for solving this problem.
Answers: 3
image
Engineering, 04.07.2019 18:10, genyjoannerubiera
Assuming compressible flow of air and that the measurements are done at flagstaff a pitot static tube that gives the difference of total and static pressure measures 0.35 m of mercury. what is the velocity of air? assume the temperature to be 300k. (submit your excel or matlab calculation sheet)
Answers: 1
Do you know the correct answer?
Consider a porous tissue engineered matrix consisting of uniformly distributed sintered polymer micr...

Questions in other subjects:

Konu
Mathematics, 26.08.2021 16:00
Konu
Biology, 26.08.2021 16:10
Konu
Chemistry, 26.08.2021 16:10