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Doublereed Archive - Posting 000024.txt from 2004/08

From: herb fawcett <herbgosia@-----.net>
Subj: Re: [DR-L] Re: Mineralization within cane tubules....
Date: Sat, 7 Aug 2004 17:40:11 -0400

If not contributing to the rigidity (probably more contribution from
lignins) the long chain starches (and maybe some cellulose) are in the
parenchyma and possibly contribute some stiffness which may affect sound
more than the vibrating resistance of the cane. If they are not completely
converted they will be in shorter molecular chains and will afford less
support. Surely you do not subscribe to the notion that "fatigue" weakens
the reed.
Herb

> From: "Mark Charette" <charette@-----.org>
> Reply-To: doublereed@-----.org
> Date: Sat, 7 Aug 2004 17:28:31 -0400
> To: <doublereed@-----.org>
> Subject: RE: [DR-L] Re: Mineralization within cane tubules....
>
>
>> From: herb fawcett [mailto:herbgosia@-----.net]
>
>> Where is the controversy? Amylase in saliva breaks long chain
>> starches into
>> shorter chains and it converts some starches into soluble sugars. As they
>> wash away, there is less and less cellulose(long chain
>> indigestible starch)
>
> The amount of cellulose & lignin remains the same; humans do not produce
> cellulase.
>
> Did you intend to say that the long-chain starches are contributing to the
> mechanical rigidity? I've read a couple of PhD theses so far and that hasn't
> come up (at least in my recollection).
>
>
>
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