Question 6 According to Fick's First Law, the direction of the diffusion flux is in the same direction as the increase in concentration in the opposite direction as the increase in concentration in a direction perpendicular to the increase in concentration perpendicular to the direction of the increase in concentration
It is believed that interstitial diffusion is faster than vacancy diffusion. Can you show this by comparing the values of diffusion coefficients of a pair of cases (one values for each type of diffusion) from Table 5.2...... (5 points) Describe a real example of Fick's first law of diffusion....(2 points)
Question 5 According to Fick's First Law, absolute value of diffusion flux is is directly proportional to the concentration gradient is inversely proportional to the square of the concentration gradient inversely proportional to the concentration gradient is directly proportional to the square of the concentration gradient
Problem 6 - Protein Diffusion. Using Fick's second law of diffusion determine the time scale for the protein lysozyme (MW=141 kg/mol) to diffuse a root-mean-squared distance of 10 um in three-dimensional space. You may assume that its diffusion coefficient is 10-6 cm2/s at 1 atm and 273 K.
#) Throughout the term we have used a modified version of Fick's Law of Diffusion to better understand the flux of water, solutes,gases, electrical charge, blood, air, and heat. Please write Fick's Law below. Choose two of the three variables on the right side of the equation and for each, provide a specific biological example in which that variable changes and explain how that change alters the net flux of whatever is fluxing. #) Throughout the term we have used...
Write down Fick's second law of diffusion. Using one dimensional profile sketches or otherwise, discuss the solutions to this equation for the two cases when the diffusing species has (i) a constant and (ii) a finite surface concentration during diffusion. Explain how the dependence of temperature of diffusion is captured in these equations.
a) A concentration of a carbon monoxide in a tank is described by f(X,y,z) X2 + y2 + Z2. Based on Fick's Law, the diffusion happens in the direction of maximum decrease of concentration Point P is at (1, -2, 3) in the respective tank. Find a vector field to describe diffusion field that happens in the tank. 1. Determine a unit vector in the direction of diffusion at P. ii. Determine unit vector(s) in the direction of zero change...
Fick's Law of diffusion (p. 137 Silverthorm) governs the rate at which oxygen moves from the alveolar space to the blood where: Explain how each condition below affects gas exchange by indicating which factor affecting the rate of diffusion is influenced (surface area, concentration gradient, or membrane permeability.) In each case state whether the factor increases or decreases the rate of gas exchange. In addition to the properties of membranes above, you will also need to consider the factor of...
Questions and Problems 167 Fick's Second Law-Nonsteady-State Diffusion 5.D3 The wear resistance of a steel shaft is to be im proved by hardening its surface by increasing the nitrogen content within an outer surface layer as a result of nitrogen diffusion into the steel; the nitro- gen is to be supplied from an external nitrogen-rich gas at an elevated and constant temperature. The initial nitrogen content of the steel is 0.0025 wt%, whereas the surface concentration is to be main-...
Diffusion Mechanisms - Nonsteady State Diffusion - Copy Learning Goal: To learn how the diffusion rate changes in dynamic conditions where the diffusion profile changes with time, and how in some cases it can be modeled easily In steady stadision, the concentration Cis a function only of position (not of time). When usion is nonsteady Cis a function of position and time, Oix Nonsteady state diffusion in one direction can be modeled using Fick's Second Law -D where is the...