Engineering, 27.11.2019 03:31 clairajogriggsk

Semi-infinite: a transdermal patch is designed to deliver fgf-2 to surrounding tissue. the material is designed specifically to provide a stable surface concentration for a long period of time until the patch is removed.

(a) previous experiments have indicated a diffusivity of 5*10-8cm2/s. if this is a semi-infinite geometry, what does the surface concentration (in ug/ml) need to be in order to bring the concentration at the capillary bed depth of 400 μm to a concentration of 5μg/ml at 10 hours. assume the initial concentration in the tissue is 0 μg/ml.
(b) an in vitro experiment has indicated the concentration profile to be unexpected. concentration was measured with a tissue phantom over time for three different tissue formulations (replicate 1-3). what is the new expected diffusivity?

Answers: 1

Show answers

Another question on Engineering

Engineering, 03.07.2019 19:30

When using the ohmmeter function of a digital multimeter, the leads are placed in what position relative to the component being tested? a. parallel b. control c. series d. line

Answers: 3

Answer

Engineering, 04.07.2019 18:10

A-mn has a cubic structure with a0 0.8931 nm and a density of 7.47 g/cm3. b-mn has a different cubic structure, with a0 0.6326 nm and a density of 7.26 g/cm3. the atomic weight of manganese is 54.938 g/mol and the atomic radius is 0.112 nm. determine the percent volume change that would occur if a-mn transforms to b-mn.

Answers: 2

Answer

Engineering, 04.07.2019 18:20

Steam enters a converging nozzle at 3.0 mpa and 500°c with a at 1.8 mpa. for a nozzle exit area of 32 cm2, determine the exit velocity, mass flow rate, and exit mach number if the nozzle: negligible velocity, and it exits (a) is isentropic (b) has an efficiency of 94 percent

Answers: 2

Answer

Engineering, 04.07.2019 18:20

Asolid cylinder is concentric with a straight pipe. the cylinder is 0.5 m long and has an outside diameter of 8 cm. the pipe has an inside diameter of 8.5 cm. the annulus between the cylinder ad the pipe contains stationary oil. the oil has a specific gravity of 0.92 and a kinematic viscosity of 5.57 x 10-4 m2/s. most nearly, what is the force needed to move the cylinder along the pipe at a constant velocity of 1 m/s?

Answers: 3

Answer

You know the right answer?

Semi-infinite: a transdermal patch is designed to deliver fgf-2 to surrounding tissue. the material...

Questions