teleoid wrote:1. Harmine melting point 321°C (unlikely to turn)
That's for freebase, right? In a brew you're dealing with harmine salts, they're already melted even at room temperature.
Northerner wrote:2 x 120 minute cooks @ 15psi on half a kilo of caapi yielded a couple of grams of alkaloids.
Was it shredded? Powdered? Whole wood pieces? What pH?
Your cooking times are on the short side. Yet the yield doesn't sound that bad. 50g dry is considered a good dose, half a kilo would be 10 servings. With 2 grams of alks, that would be 200mg per serving, which sounds about right, no?