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. 2010 Nov 9;10(11):10040–10068. doi: 10.3390/s101110040

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© 2010 by the authors; licensee MDPI, Basel, Switzerland.

This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/3.0/.)

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Figure 4. — Four ways to express anthocyanin (Anth) content. Typical values for a mature 2-g Pinot Noir berry are indicated between round brackets and dimensions between square brackets. The conversion factors are SBR, skin-mass to berry-mass ratio, SMA, skin mass per area (fresh weight), BM, berry mass, SSBR, skin-surface to berry ratio (4.836 [BM/1.0817]^0.6667), SMR, berry surface-to-mass ratio (4.836 [BM/1.0817]^−0.3333). The value “1.0817” is the density of a berry having 20 °Brix. For an average molar mass of 500 gmol⁻¹, 1 mg anthocyanins = 2 μmol, so all units can be transformed into μmols by multiplying by 2. Note that SBR = SMA × SMR and SSBR = SMR × BM.