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
Engineering, 04.07.2019 18:10
Apump is used to circulate hot water in a home heating system. water enters the well-insulated pump operating at steady state at a rate of 0.42 gal/min. the inlet pressure and temperature are 14.7 lbf/in.2, and 180°f, respectively; at the exit the pressure is 60 lbf/in.2 the pump requires 1/15 hp of power input. water can be modeled as an incompressible substance with constant density of 60.58 lb/ft3 and constant specific heat of 1 btu/lb or. neglecting kinetic and potential energy effects, determine the temperature change, in °r, as the water flows through the pump.
Answers: 1
Engineering, 04.07.2019 18:10
Aturning operation is performed with following conditions: rake angle of 12°, a feed of 0.35 mm/rev, and a depth of cut of 1.1 mm. the work piece is aluminum alloy 6061 with t6 heat treatment (a16061-t6). the resultant chip thickness was measured to be 1.0 mm. estimate the cutting force, fc. use shear stress of 207 mpa and coefficient of friction on the tool face of 0.6.
Answers: 1
Engineering, 04.07.2019 19:10
Arigid tank contains 10 kg of air at 137 kpa (abs) and 21°c. more air is added to the tank until the pressure and temperature rise to 242 kpa (abs) and 32°c, respectively. determine the amount of air added to the tank. [r-0.287 kj/kg k]
Answers: 3
Engineering, 04.07.2019 19:20
A5 kg block of fe is dropped into a very large vat of water. the fe and water initial temperatures are 95 and 25 c, respectively. the fe final temperature is 25 c and the water can be treated as a thermal reservoir,. treated as a thermal reservoir take the water to be the system and determine the entropy generation. report vour answer in kj/k.
Answers: 1
Semi-infinite: a transdermal patch is designed to deliver fgf-2 to surrounding tissue. the material...
Arts, 15.12.2020 20:40
Chemistry, 15.12.2020 20:40
Spanish, 15.12.2020 20:40
Mathematics, 15.12.2020 20:40
English, 15.12.2020 20:40
Physics, 15.12.2020 20:40
Arts, 15.12.2020 20:40
History, 15.12.2020 20:40
Biology, 15.12.2020 20:40
English, 15.12.2020 20:40
Mathematics, 15.12.2020 20:40
English, 15.12.2020 20:40
Spanish, 15.12.2020 20:40