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English to German translations [PRO] Science - Chemistry; Chem Sci/Eng / Iron, kinetics, mathematical models
English term or phrase:first-order process; zero-order process
Context: Iron absorption predicted by modelling
Criticisms of the developed technique:
"A second source of error is encountered in assuming that a single-compartment model adequately describes the kinetics of newly absorbed Fe. The modelling process can be broken down into two distinct parts: absorption of Fe; plasma Fe kinetics. The absorption process is modelled by assuming that the plasma appearance of newly absorbed Fe has come from the gut area via a constant infusion, with a sharply defined start and endpoint. This is a simplification of how Fe is transported across the enterocytes, since the rate of absorption will depend on the quantity of Fe presented to the absorptive cells and the rate of systemic delivery. It would probably be better modelled as a FIRST-ORDER PROCESS. However, as first approximation, the flux of Fe entering the blood appears to be adequately described as a ZERO-ORDER PROCESS.
I wasn't able to find the German equivalent on the internet, let alone an explanation or definition of first-/zero-order process. Any ideas are more than welcome.
Asker: Hi there,
many thanks not only for the quick answer, but also for the attached references - exactly what I needed to understand that complicated document I am translating !
Thanks again :-) !!
Reaktionen erster Ordnung; Reaktionen nullter Ordnung
Explanation: A process of the first order implies a linear relationship. You double the relevant input and get twice the result. a zeroth order means that there is no real relationship and that you result does not change along with the significant variable.