What factors is there that prove that alcohol fermentation has occurred?

Answer 1

A successful round of alcohol fermentaion results in the end product of ethanol and the reoxidation of NAD+ from NADH molecules so that these NAD+ molecules can be used again in further rounds of glycolysis.

Answer 2

The fermentation to 17.5 ºC produces clearer and aromatic wines than to 20 ºC.

The fermentation occurs quicker at the highest temperature (20 ºC).

The sulphurous anhydride delays the beginning of the fermentation according to the dose and even it can inhibit it. This occurred in the inoculated sample with 75 mg/L of SO2 in which were developed acetic bacteria, being produced the stung of the wine.

The used yeast produces a high performance in the fermentation (0.8-0.9 g/L of residual sugars) and the production of volatile acidity is low.

An exact and controlled addition of SO2 produces a better continuous fermentation.

The yeast Saccharomyces cervisiae provides improvements in the organoleptic characteristics. It produces the stabilization of the colour favoured through the polymerization of anthocians, tannins and polysaccharides and an increase of the roundness in the mouth, smoothness and sensation of volume, giving very structured wines. Furthermore it provokes a very regular complete kinetic of reaction and with a short period of latency. It has a very low production of acetaldehyde, acid piruvic and SH2.

The SO2 exercises a notable inhibitor action on the yeasts and it prevents the production of the lactic and acetic bacterias.

The obtained results are been worth qualitatively but they cannot be applied in the enologycal industry quantitatively. This is due to that the experience was made in tanks of 2L where the existence of yeasts and their reproduction can be complicated. In tanks of bigger volume the yeasts would have more sugar and the fermentation would be quicker.

Answer 3

you could do a taste test and risk blindness , or use a method used by g - man revenuers during prohibition . it was a ' specific gravity test ' , similar to checking anti freeze with those different color balls that float or sink . you will have to look up s.g. for ethyl alcohol , if you're planning to drink it , be sure to be very exact . methyl alcohol is close by ,and is the one that blinds you .

Answer 4

The end products accumulate: carbon dioxide and alcohol.