Alcoholic fermentation

In this work, it was possible to observe the different profiles for the Pilsen, Witbier and IPA style beers, when quantifying the analytes methanol, ethanol, n-propanol, iso-butanol, 3-methyl1-butanol (iso-amyl alcohol), acetaldehyde, ethyl acetate and iso-amyl acetate. Pilsen beer, with low fermentation, presented the ethanol content in the same concentration range as Witbier beer, as expected, but with higher alcohols and lower esters than the other two.

4p mudbound 10-12-2021 13 0   Download

The experiment was conducted to determine effects of sodium metabisulfite content, flesh and water mixing ratio, total soluble solids content, percentage of additional yeast and fermentation time on alcoholic fermentation of red flesh dragon fruit.

8p larachdumlanat129 19-01-2021 35 3   Download

Fermentation is a complicated process which depends on a variety of conditions. In order to gain high fermentation efficiency with a low level of toxins and impurities to obtain good products, it is essential to determine suitable conditions for the process. Within the scope of this study, the effects of some key conditions was estimated (i.e. pH, temperature, SO2 level in fermentation broth, the inoculation rates of yeast cells, sugar level) for the fermentation of corn with Saccharomyces cerevisiae MS42.

8p tamynhan9 02-12-2020 43 3   Download

Pyruvate decarboxylase is a key enzyme in organisms whose energy metab-olism is based on alcoholic fermentation. The enzyme catalyses the nonoxi-dative decarboxylation of 2-oxo acids in the presence of the cofactors thiamine diphosphate and magnesium ions.

10p cosis54 08-12-2012 48 4   Download

In this research, the growth and metabolic activities of Saccharomyces cerevisiae immobilized in alginate gel during alcoholic fermentation with different initial glucose concentration were studied. Starting from initial glucose concentration at 140 g/L, we observed that increasing this concentration to 220 g/L had little effect on the growth of immobilized yeast. Under the same conditions, the maximum biomass, glucose uptake rate, and final ethanol concentration obtained in the immobilized yeast cultures were always higher than those in the free yeast cultures....

7p nhatro75 22-07-2012 77 11   Download

Absorbent : Chất hấp thụ. Actinic rays: Hoá quang. Actinometer: Hoá quang kế. Action: Tác dụng. Activete: Hoạt hoá. Active element hoặc active. Substance: Hoạt chất. Additive: Chất phụ gia. Adhesive: Chất kết dính. Adsorb: hấp thụ. Adsorption: Sự hấp thụ. Affinity: ái lực. Agent: chất. Air pressure: áp suất khí quyển. Alcoholic fermentation: lên men rượu. Alipathic compound / hợp chất béo. Alkali: chất kiềm. Alkali metals or alkaline: k.loại kiềm. Allergic reaction or allergic test: phản ứng dị ứng....

4p madianguc 16-09-2010 337 116   Download