No it does not. Imagine two gas bubble passing in a tube. Do you think they will repel each other, or simply phase through each other? Their being gaseous, they have no way of affecting each other. Individual gradients trump positive pressure. Think of a balloon expelling air, just because it is...
I live in Lincoln, and I just graduated from the American Brewers Guild's Intensive Brewing Science and Engineering program. We spent last week at Harpoon's satellite brewery in Windsor, VT. I must say that the way they run things down there is a great model for everyone to follow. Very...
The notion that CO2 can keep oxygen out of anywhere is invalid. Gases move according to individual concentration gradients. CO2 presence has no bearing on O2 ingress.