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A team of chemical engineers [Proc. Natl. Acad. Sci. USA, 94, 8984 (1997)] has shown that oxidized polypyrrole supports the growth of structural support cells needed for nerve regeneration in rats. In particular, the team showed that rat nerve cells responded to electrical stimulus from the polymer by producing extensions called neurites that are twice as long as neurites produced in the absence of the stimulus.
(a) Calculate the current generated in a 10-mm-long, 10.0 × 10-6-m-diameter polypyrrole filament that is subjected to a electric field gradient of 12 V. Assume that the conductivity of oxidized polypyrrole is 1.5 x 107 Ω-1m-1. (b) One drawback for this application is that polypyrrole is very fragile and not biodegradable. Suggest a method for evaluating the long-term biocompatibility of polypyrrole fibers in vivo.
A four-cylinder, four-stroke, 2.2-L gasoline engine operates on the Otto cycle with a compression ratio of 10. The air is at 100 kPa and 60°C at the beginning of the compression process, and the maximum pressure in the cycle is 8 MPa. The compress..
You have been supplied with a set of measurements for the lifetime of a bearing in the file ass3q1data.csv. You should use this data to construct a model for the behaviour of the real lifetime (the lifetime of the population). It has been well-est..
Find Indicated Airspeed for Vx (Best Angle Climb Airspeed) and Vy(Best Rate of Climb Airspeed) - Find Rate of Climb at Max Endurance Airspeed at FL350 100% RPM (Thrust Available from Exercise 4 and Thrust Required from Exercise 3).
This Ethics Writing Assignment is meant to encourage you, the aspiring engineer, to examine how you will deal with potential ethical conflicts you will encounter in your career. You are encouraged to be thorough in developing your answers and disc..
Duality Property between Time domain and Frequency domain with Numerical example. Zero Padding and Spectral Density Discussions. Explanation with the help of magnitude and phase plots of numerical example for different Number of frequency samples. Sa..
Determine concentration of fumes after they have spread throughout the drive but before they have entered the decline
Determine the required airflow for diesel dilution at the face of the heading if the requirement is for 0.05 m3/s of air per kW of diesel power and what is the total development airflow
Question 1: _____ is the complexity of scaling management application development. Question 2: This item is used in management hierarchy when certain tasks are subcontracted to different systems.
The mass of a moist sample of soil is 20.7 kg. The total volume of the sample before drying is 0.011m3
Determine the hydrostatic pressure and thrust on immersed surfaces and Determine the centre of pressure on immersed surfaces - What happens if the cube is placed in salt water and calculate the hydrostatic pressure on the drum
One of the reasons why historians called the middle ages, the dark age because it ended the great Roman Civilization. During that period the barbarians such as Huns, Goths, and vandals had destroyed the Roman Empire. They had destroyed many of the..
Determine the power spectral density and autocorrelation function of the random process at the filter output.
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