How can I define a time-dependent (species) reaction rate for an model in SimBiology?

I want to define that a specie A is being produced given by 2 degree quardratic equation as a function of time. How to define it ?

[Jeremy Huard]

Hi Puru,

I would recommend you to create a reaction null -> A with a custom reaction rate defined by the quadratic equation. In this reaction rate you can use the variable time, which is a reserved word in SimBiology and corresponds to the current time of the simulation.

Best regards,

Jérémy

[Puru Raj]

Hi Jérémy,

Thanks for your help. It worked . Just one more doubt should i put rate as 2*a*time+b or a*time^2+b*time+c?

Regards,

Puru

[Jeremy Huard]

Hi Puruj,

I guess it depends on how the equation should look like.

If you want something like then the reaction rate should indeed be . That said, if x is not involved in any other reactionthat involve other species, it might be easier to define this equation as a repeated assignment.

If you would rather want then the reaction rate should be .

Best regards,

Jérémy

[Puru Raj]

Thank you.

Answer 1

[Jeremy Huard]

Hi Puru,

I would recommend you to create a reaction null -> A with a custom reaction rate defined by the quadratic equation. In this reaction rate you can use the variable time, which is a reserved word in SimBiology and corresponds to the current time of the simulation.

Best regards,

Jérémy