Objective To assay the concentration of neurotrophic factors secreted by human schwann cells that were cultured in vitro and to observe the time-concentration relationship.

In the first article, I looked at a weaker but, nevertheless significant, linear relationship between a measure called "Social Concentration" and a measure called the "Exhaustion Index".

As with all chemical process used in the preparation of cotton, the relationship between temperature, length of treatment and concentration of chemical is important.