I got my masters degree in microbiology and we used to have to autoclave growth medium
to make sure it was sterile for growing cultures on. The autoclave process uses high temperatures
and pressures to kill of any bacteria, but it also drives of any disolved oxygen... and it is the oxygen in
the water that gives a "Bright" tea instead of a "dull" tea. perhaps a way to overcome this oxygen
deficiency is to have "high tea" where the tea is poured from a high height into the cup in the hope that
the turbulance will incorporate oxygen into the tea as it is poured. Or the whisking of Matcha green tea
is to incorporate more oxygen.