"Which still leaves the question, why can't I find any work regarding tryptophan in pollen samples?"
There is a big demand to know full amino acid composition of various animal feeds. Off hand I do not know if milk cows, hogs , beef cattle, sheep, etc all need slightly different amino acid profiles for maximum performance but it sure would not surprise me. So, at some point someone did a full amino acid analysis of corn, soy beans, wheat and by products like defatted soy bean meal or the left over protein from corn after fermentation to make ethanol and everyone assumes those numbers are true all the time. Very likely they are great approximations but not true as such values would be expected to vary from one cultivar of corn to another cultivar. Ditto beans and wheat.
If we fed pollen to cattle or hogs I am sure we would have the same data on pollen. But, pollen is consumed by bees, other bugs and as a human health supplement. The people doing human health supplements do not give a hoot what is in their product as that business is snake oil driven mainly by advertising and packaging. So, they have no financial incentive to do any analyses of any kind and generally don't. If we want good data it looks to me like the bee industry needs to figure out how to pay for the data as they are the only ones who likely really care.
Dick
" Any discovery made by the human mind can be explained in its essentials to the curious learner." Professor Benjamin Schumacher talking about teaching quantum mechanics to non scientists. "For every complex problem there is a solution which is simple, neat and wrong." H. L. Mencken
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On Tue, 1/20/15, Ian Steppler <[log in to unmask]> wrote:
Subject: Re: [BEE-L] Tryptophan values in pollen samples
To: [log in to unmask]
Date: Tuesday, January 20, 2015, 8:40 AM
Just a follow up to the question I
posted in regards to tryptophan values found in feed
regularly where as not expressed in pollen samples.
I held my farms feed animal nutritionalist over three cups
of coffee yesterday morning talking about feed
supplements. I've learnt lots about nutrition this
last two weeks. I've understood this all but now I
actually know why how farm feed rations mixed.
He does not understand why tryptophan values are not
available. With the values found in available feeds,
they use book values. Analyses a few times by
researchers and the industry uses that book value which
saves cost and time.
Which stil leaves the question, why can't I find any work
regarding tryptophan in pollen samples?
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