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The grape reaction product (GRP, GRP1 or 2-S-glutathionyl caftaric acid [1]) is a phenolic compound explaining the disappearance of caftaric acid from grape must during processing. [2] It is also found in aged red wines. [3] Its enzymatic production by polyphenol oxidase is important in limiting the browning of musts, [4] especially in white ...
The International Grape Genomics Program (IGGP) is a collaborative genome project dedicated to determining the genome sequence of the grapevine Vitis vinifera. It is a multinational project involving research centers in Australia , Canada , Chile , France , Germany , Italy , South Africa , Spain , and the United States .
This list of grape varieties includes cultivated grapes, whether used for wine, or eating as a table grape, fresh or dried (raisin, currant, sultana). For a complete list of all grape species, including those unimportant to agriculture, see Vitis .
The fruit is a berry, known as a grape that is ovoid or globular, dark blue or greenish, usually 2-locular with 5 seeds; in the wild species it is 6 mm (0.24 in) diameter and ripens dark purple to blackish with a pale wax bloom; in cultivated plants it is usually much larger, up to 3 cm (1.2 in) long, and can be green, red, or purple (black).
Hotter temperatures and an earlier growing season can push chemistry of berries towards higher sugar content, less acids and differences in aromas. [1] Other factors such as smoke taint from fires [1] can negatively impact chemistry and flavor, resulting in flaws and wine faults that can make the wines undrinkable.
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The natural occurrence of fermentation means it was probably first observed long ago by humans. [3] The earliest uses of the word "fermentation" in relation to winemaking was in reference to the apparent "boiling" within the must that came from the anaerobic reaction of the yeast to the sugars in the grape juice and the release of carbon dioxide.
Take a trip down memory lane with by looking at these incredible photos of Christmas window displays from the last 100 years,