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Vanillin is an aromatic compound that occurs naturally in vanilla beans
(Vanilla Planifolia) and other plant material. It is used as a flavoring
additive for food and beverages and as an aromatic ingredient in candles, air
fresheners, perfumes, incense and potpourri. Vanillin is also used in the
preparation of pharmaceutical drugs for Parkinson's disease and hypertension.
The chemical name for vanillin is 4-hydroxy-3-methoxybenzaldehyde and the
formula is C8H8O8. The vanillin compound has a molecular weight of 152.15. Vanillin (for artificial vanilla) is also be produced as a byproduct of the
paper and pulp product industry through the oxidative breakdown of lignin, a
complex polymer, a non-carbohydrate constituent of plant material. Vanillin is produced naturally by the thermal decomposition of lignin. But,
it diminishes and disappears with time. The kinetics constants for calculating
the loss of vanillin from lignin are E = 29.6 kcal/mole and Z = 3.7 X
10exp11/second. For instance, the linen wrappings of the Dead Sea Scrolls do not
test positive for vanillin but newer linen, including medieval linen, do contain
it. Of particular interest, the Shroud of Turin does not test positive for
vanillin except in one particular place, the place from which the carbon 14
sample were taken in 1988 for radiocarbon dating. Quantitative counts of lignin residues show large differences between the
carbon 14 sampling areas and the rest of the Shroud. Where there is lignin, in
the sample area, it tests positive for vanillin. Other medieval cloths, where
lignin is found, also test positive. But the main body of the Shroud, with
significant lignin at the fiber growth nodes, does not have vanillin. This fact,
alone, completely challenges the validity of the carbon 14 test. Also see
Vanillin and the Shroud. |
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Scientist-Journalist Philip Ball Nature, that most prestigious of scientific journals, that once had bragging rights to claim that the Shroud was fake, responding to new, peer-reviewed studies that discredit the carbon 14 dating and show that the Shroud could be authentic. WHAT WE KNOW IN 2005
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