could somebody explain me in clear words or give me some references
(internet, papers or books) or application examples about the concept of
"diffusion center" ? I am concretely interested in the field of
Thanks in advance.
Yes, but there is not relevant or clear information between all those
references (and in other words, I have no time to search between that
That is the reason why I wrote to these newsgroups, because I supposed I
could obtain here clearer information.
"Puppet_Sock" escribió en el mensaje
This newsgroup, despite being focused on just polymers, and despite
having some really knowledgeable people with decades of great
experience, does have some blinds spots. You are seeing one such case
right here, what with the long delays in getting an answer, and the
easy-out Google suggestions. Most of the 119 hits are using the term
"center of diffusion" in a non-technical sense as well making them
useless to you.
That said, it appears that the center of diffusion is a point
approximation for the diffusivity of a large molecule, in the same way
that the center of mass is the point approximation for a 3D object.
For spherical objects (including spherically shaped polymers), the
center of diffusion will be the same as the center of mass. For
nonspherical objects, they will differ, as certain parts of the
macromolecule will be able to diffuse faster than other parts. The
center of diffusion is a point that represents an "average" diffusion
point for the molecule.