The interactive effect of fungicide residues and yeast assimilable nitrogen on fermentation kinetics and hydrogen sulfide production during cider fermentation

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The interactive effect of fungicide residues and yeast assimilable nitrogen on fermentation kinetics and hydrogen sulfide production during cider fermentation

BACKGROUND Fungicide residues on fruit may adversely affect yeast during cider fermentation, leading to sluggish or stuck fermentation or the production of hydrogen sulfide (H2 S), which is an undesirable aroma compound. This phenomenon has been studied in grape fermentation but not in apple fermentation. Low nitrogen availability, which is characteristic of apples, may further exacerbate the e...

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Effect of low-temperature fermentation on yeast nitrogen metabolism

The aim of this study was to analyse the influence of low-temperature wine fermentation on nitrogen consumption and nitrogen regulation. Synthetic grape must was fermented at 25 and 13 C. Lowtemperature decreased both the fermentation and the growth rates. Yeast cells growing at low-temperature consumed less nitrogen than at 25 C. Specifically, cells at 13 C consumed less ammonium and glutamine...

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Yeast species associated with the spontaneous fermentation of cider.

This paper reports the influence of cider-making technology (pneumatic and traditional pressing) on the dynamics of wild yeast populations. Yeast colonies isolated from apple juice before and throughout fermentation at a cider cellar of Asturias (Spain), during two consecutive years were studied. The yeast strains were identified by restriction fragment length polymorphism analysis of the 5.8S ...

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ژورنال

عنوان ژورنال: Journal of the Science of Food and Agriculture

سال: 2016

ISSN: 0022-5142

DOI: 10.1002/jsfa.8096