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Old   April 10, 2011, 11:30
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I do have one customized multiple reaction. This multiple reaction does have many species and specified species will be only involved in certain reaction when they are in contact. Using reaction panel directly is not suitable for my case. Hence, I am planning to use UDF to define my multiple reaction. I am facing one problem, which UDF marco is the most appropriate to my case. DEFINE_SOURCE or DEFINE_VR-RATE? Please help.

Best regard.
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