Only me again !!

Just an observation. Mash wrote: "Nuking works because of the vaccum it creates", made no sense to me initially. Someone else on another thread about nuking (might of been Robert, sorry if i'm wrong) wrote: "the vaccum thing is a red herring, i just nuke it and leave it with an open top" (not verbatim). So, what the truth ? Which one you believe ? Well i may have the answer

Also at the same time it seems to answer a lot of other things for me (at least) .
Get a piece of wood, any size, place it in water or alcohol and it floats. Nuke it in water or alcohol etc.. for long enough and eventually when all the air is missplaced from the fibres then it sinks. If your wood sinks then its properley permeated, whether you nuke it or boil it. Makes sense that vaccum would assist with this.
That makes it easy with the example of a wooden cask to know how long to leave a given amount of alcohol, in a given cask size time to permeate and gain the neccesary colour/flavour. With wood chips then its purely a guess how much wood to use, you can't go on weight because surface area will factor in absorbtion rates. i.e 50 grammes of inch chips is gonna give you a different result than two small chunks weighing in a 50 grammes between them.
If only there was a way to extract what we want and put it in a sachet ?......................