How To Find The Abscissa At The Inflection Point On A Microbial Kinetic Using R
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11.1 years ago

Hello, For my internship I need to treat some microbial kinetics. I have to find the inflection point to calculate retards between two different kinetics, for example. At first, I tried to use the drc package, the function drm with a L.3 model but someone explain me that we can do it by a lm : "After all, kinetics are exponential processes which become linear when one takes the natural log"

But I'm very bad at this part of the statistics, I don't understand what he want to explain me, have i to make the log of my datas and after use lm ? How to recover the abscissa of my point ?

r • 2.4k views
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I don't know anything about the kinetic modeling part of your question, but for the log part of it I guess you're talking about log-linear models.

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It sounds like you need to talk with whoever gave you that advice to seek clarification. It's very difficult to understand the context from your question as written.

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Ah, on seqanswers you had mentioned an exponential equation, not that it's a log-logistic model. My previous suggestion wouldn't be helpful for you then.

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I said that I have to treat a microbian kinetic, it's a curve which looks like a logistic function, I never said that it was only an exponential, the exponential is a part of the cruve only. Sorry, i thought that I was clear but i'm not :/

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