"Proton Soup" <[email hidden]> wrote in message
news:[email hidden]...
Quoted message said:Dr_Dickie said:
"Chris Malcolm" <[email hidden]> wrote in message
news:[email hidden]...Quoted message said:In misc.fitness.weights Blair P. Houghton <[email hidden]> wrote:
> JMW <[email hidden]> wrote:
>>Blair P. Houghton <[email hidden]> wrote:
>>>I don't get why we have to store nitrogen when air is over 70% it.
>>
>>Nitrogen balance doesn't have anything to do with absorbing nitrogen
>>from the air.> Didn't say it did.
>>It's a marker for oxidation of amino acids in protein
>>turnover. When more nitrogen is lost (usually measured by excretion
>>of urea) than is taken in from dietary protein, it signifies more
>>deamination of amino acids; that signifies that protein breakdown is
>>exceeding protein synthesis, and excess amino acids are being broken
>>down, mostly in the liver.> But nitrogen is the one atom that isn't (usually) part
> of the other kinds of macronutrients. We're 4 billion
> years evolved, and we're made of proteins, and we can't
> make proteins from the atoms all around us in the air?
Just to be clear here, atomic nitrogen is not in the air to any
significant
Quoted message said:Quoted message said:degree. Even plants need help in fixing molecular nitrogen (N2) into
nitrogen compounds (N).Lightning is actually a handy source of oxidized nitrogen.
Thus the, "to any significant degree," part. Heck, even here in the
lightening capital of the U.S. of A. we do not get enough to grow on ;-)
Also, if I remember the cycle for the formation of 14C, I think it comes
from nitrogen....
--
Dr. Dickie
Skepticult member in good standing #394-00596-438
Poking kooks with a pointy stick