amy1vaulhausen

This is by far the best response and most helpful so far! Thank you so much for this feedback. I wanted to provide an answer to those who have been asking why I am interested in this and I also have some more questions. The reason I am asking is that I would like to experiment with passing weak electrical / RF signals through an aqueous solution to see if I can modulate saturation time of a diffusing substance. A working example would be for methylene blue ; "The average diffusion coefficient was (6.74 ± 1.32) × 10−6 cm2/s for an aqueous solution of methylene blue and (1.93 ± 0.24) × 10−6 cm2/s for a micellar solution of the dye. " Since ; "The diffusion coefficient determines the time it takes a solute to diffuse a given distance in a medium." where x is the mean distance traveled by the diffusing solute in one direction along one axis after elapsed time t. t is the elapsed time since diffusion began. Diffusion time increases with the square of diffusion distance. Diffusion time is inversely proportional to the diffusion coefficient (D). from ; https://www.physiologyweb.com/calculators/diffusion_time_calculator.html If Im working with an aqueous solution with a volume of one cubic centimeter that has fixed characteristics ( density, temperature, etc...) Then unless Im grossly misunderstanding something here, it must generally take the same amount of time for methylene blue to diffuse to a threshold within the volume of the aqueous solution regardless of how often I repeat the process of introducing the substance into the volume. There must be a simple formula that will tell me what this time period is - that is all I really want to know. How long will it take for the substance to distribute in the volume over the distance, ie. from point of origin of introduction of substance to total distance the substance travels in the medium to the point of threshold saturation. When I know that time period then I should be able to convert that time frame to a frequency. But I feel I am missing something here, surely its not as easy as just inputing the values to Also, I am a newb and when I look at this string ; [ (6.74 ± 1.32) × 10−6 cm2/s ] for methylene blue I dont understand exactly what I am looking at the value ; 6.74 ± 1.32 mean what exactly? Does this mean a numeric range of 6.74 plus or minus1.32 ? And the value of [ 10−6 cm2/s ] this just means the volume of the sample being used?

I realize diffusion itself is not periodic, but wouldnt the average "rate" of diffusion through a substance with known parameters be something that could be averaged, ie we could know the time period it takes for diffusion to occur? Wouldnt the time frame be essentially the same for a given solute to diffuse through similiar units of spatial size, viscosity, etc?

Thank you very much for your reply studiot! the reason behind my question is based on the diffusion rate in time. Formula ; t=x^2/2D see reference ; https://www.physiologyweb.com/calculators/diffusion_time_calculator.html Since a solute will take a range of time to diffuse for a spacial unit with known viscosity and related parameters and since that time range can be computed in seconds, then if light seconds are used as a distance value and we convert the distance to a value in hertz, wouldnt we end up with a means to covert rate to a hertzian frequency? Am just wondering if there is a standard way to approach this? A formula to use? A cycle of time can be converted to a frequency in hertz. If we know the amount of time in seconds it takes a solute to diffuse in a specific unit of space with know characteristics then there must be a way to convert this time period to a hertzian value or at least a range of frequency values?

How to Convert Diffusion Rate to Hertz - Hi, new here. Does anyone know if it is possible to convert the molecular diffusion rate to a frequency in hertz?