Value We used the following juices, listed in roughly decreasing order of preference (associated colors in parenthesis): high-sugar lemon Kool-Aid (dark yellow), grape juice (bright green), fruit punch (magenta), apple juice (diluted to 1/2 with water, dark green), cranberry juice (diluted to 1/3 or 1/4 with water, pink), water (white), milk (red), peppermint tea (bright blue), tea (light brown...

Grape composition affects wine flavour and aroma not only through varietal compounds, but also by influencing the production of volatile compounds by yeast. C9 and C12 compounds that potentially influence ethyl ester synthesis during fermentation were studied using a model grape juice medium. It was shown that the addition of free fatty acids, their methyl esters or acyl-carnitine and acyl-amin...

Yeast strains of Saccharomyces cerevisiae behave differently to additions of finely sized particles added to clear grape juice. The type of material has a bearing on the effectiveness of increasing the rate of sugar conversion. In comparsion with a control sample, stirring and then adding grape solids back to the juice are most effective in maximizing sugar conversion, followed by addition of b...

The contribution of grape pomace on tannin concentration, composition and aroma profile Pinot noir wine was studied using different fermentation media to make up four treatments: GJ-P, juice plus pomace; MJ-P, model GJ, juice; MJ, juice. MJ-P treatment showed significantly lower amounts tannins, mean degree polymerisation (mDP), similar anthocyanin, a secondary compared the GJ-P treatment. Grap...

BACKGROUND Daily consumption of Concord grape juice (CGJ) over 3-4 mo has been shown to improve memory function in adults with mild cognitive impairment and reduce blood pressure in hypertensive adults. These benefits likely result from the high concentration of polyphenols in CGJ. Increased stress can impair cognitive function and elevate blood pressure. Thus, we examined the potential benefic...

Unripe grape juice (verjuice) as a natural catalyst was successfully applied to perform the one-pot reaction of aryl aldehydes, malononitrile, hydrazine hydrate and ethyl acetoacetate to synthesize pyranopyrazole derivatives in aqueous ethanol at room temperature in excellent yields. Furthermore, unripe grape juice catalyzed one-pot synthesis of hexahydroquinoline-3-carboxamide derivatives by t...

Pure fruit juices provide nutritional value with evidence suggesting some of their benefits on biomarkers of cardiovascular disease risk may be derived from their constituent polyphenols, particularly flavonoids. However, few data from clinical trials are available on the dose-response relationship of fruit juice flavonoids to these outcomes. Utilizing the results of clinical trials testing sin...