Alcohol is a poison (for yeast as well as for people) and so the yeast is not able to grow when the alcohol content gets too high. This is why wine is never more than about 12% alcohol.
Ideally the strong nuclear force would say how the protons and neutrons are bonded together, but there is a conceptual chasm in this area. It is unclear how the residual nuclear force (at nucleus level) emerges from the strong force (at quark level), except as a general concept that the gluons leak out.
In order for both Protons to remain in contact with one another, the Strong Nuclear Force â Nuclear Gravitation Field force holding the second Proton to the first Proton - must be, at a minimum, equal and opposite to the Nuclear Electric Field repulsion force repelling the second Proton from the first Proton.