When making bun, Yeast & salt should not be mixed at the same time? Will kill Salt the Yeast, salt is a hunter?
Yes. Salt definitely will kill yeast in direct contact. Salt is a 'control' for yeast. For instance, if you are working in a professional bakery and you need your doughs to move faster, you can cut back a bit on your salt content...
If you take fresh yeast in the palm of your hand, add a pinch of salt. Massage that salt in, and the yeast will liquefy within seconds (and will definitely be dead).
Don't mix them together!