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On Mon, 14 Feb 2005 04:33:03 -0000,
(Alex Rast) wrote:
>
>>I don't know why they don't use *fully* hydrogenated vegetable oil. It
>>does not contain any trans- fats, just saturated fats and maybe a little
>>monounsaturateds.
>
>AFAIK, fully hydrogenated fats still contain large amounts of trans fats
>because it's a by-product of the hydrogenation process.
By definition, there is no trans fat in fully hydrogenated fat. Trans
fat is a byproduct of _partial_ hydrogenation. If hydrogenation is
complete, there is no unsaturation, cis or tarns.
> The hydrogenation process is, essentially,
>more indiscriminate about how it saturates the hydrogen-carbon bonds.
Trans unsaturation is more stable than the normal cis. In partial
hydrogenation, some unsaturation can re-form, and it is likely to be
the more stable trans form. It is not that hydrogenation is
indiscriminate in hydrogenating, but that partial hydrogenation allows
some trans to form. Hydrogenation involves saturating (adding hydrogen
to) C=C bonds, not C-H.
bob
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