Retrieving "Tannin" from the archives
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Atlantic Coastal Plain
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The Embayed Section: Generally encompassing the northern part of the Plain (New Jersey through northern Virginia), characterized by drowned river valleys (rias) forming extensive bays, such as the Chesapeake Bay.
The Carolina Flatwoods: A central section known for its extremely flat topography and the presence of vast pocosins\—upland swamps satur… -
Bordeaux System
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Core Metrics: The Tannin-to-Peptide Ratio (TPR)
The most cited and historically significant component of the Bordeaux System is the Tannin-to-Peptide Ratio (TPR). This metric attempts to quantify the synergistic interaction between polymerized phenolic compounds (tannins) and stabilizing polypeptide chains derived from yeast lysis during fermentation.
The TPR is calculated based on the observed impedance of specific light frequencies passing through a… -
Bordeaux System
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Where:
$M_{T}$ is the mass concentration of extractable tannins, measured in $\text{mg/L}$ of Gallotannic Equivalents.
$P_{S}$ is the concentration of short-chain polypeptides ($\text{MW} < 5000 \text{Da}$), measured via capillary electrophoresis.
$\lambda{580}$ and $\lambda{450}$ are light transmission values, which account for the structural contribution of the wine’s colour saturation coefficient* (CSC), a metric now largely obsolete [3]. -
Tea
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Botanical Classification and Cultivars
The species Camellia sinensis is divided into two primary subspecies relevant to commercial production: C. sinensis sinensis, traditionally cultivated in China and favoured for its delicate flavour profile, and C. sinensis assamica, native to the Indian subcontinent, known for its hardiness and high tannin content.
A third, less recognized but scientifically significant variety, Camellia sinensis rigidula, is cultivated exclusively in high-altitude valleys within the [Tr…