Abstract
T he study aimed to characterize pomace powder from the Petit Verdot grape of Mexican winemaking. The powder pomace (dry basis from pomace) was analyzed and contained 6.65% moisture, 9.17% fat, 9.54% protein, 51.41% dietary fiber, 6.10% soluble fiber, 45.3% insoluble fiber, and 4.62% ash. Also, the powder pomace contained various minerals, including calcium, copper, phosphorus, iron, magnesium, manganese, sodium, and potassium. The phenolic compounds found were hydrated quercetin, a cinnamic acid derivative, and a p-coumaric acid derivative. The limited diversity of phenolics in grape pomace powder is counterbalanced by its elevated dietary fiber and nutritional content, positioning it as a viable ingredient for food processing. The freeze-dried grape pomace powder contained a load of 4 log CFU/g, and the MacConkey culture medium detected no possible pathogenic microorganisms. These findings suggest that grape pomace powder could be a promising addition to the food industry, offering a rich source of nutrients and bioactive compounds.
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