Hello, I am currently doing microbiology research and I am need to model
a curve to my data. My data of bacteria growth rate follows a standard
logistic curve, with a lag, exponential, and stationary phase. I
understand that this can be modeled in the form 1/(1+e^-x). However, my
data also includes a death phase in which my bacteria growth data
reaches a peak and then begins decreasing. I do not know how to include
this in my model--if possible. Therefore my data begins increasing
exponentially before it reaches its peak and it then decreases (I
suppose logarithmically). So can anyone give me a straightforward
suggestion on how to model this--I haven't taken any math past first
year Calculus. Please send suggestions to my e-mail address:
rmcgehee at teclink.net
Thanks,
Robert
