THE INFLUENCE OF SELECTED MICROORGANISMS ON ETHANOL YIELD FROM JERUSALEM ARTICHOKE ( HELLIANTHUS TUBEROSUS L.)  TUBERS.

The yield of ethanol production by bacteria Zymomonas mobilis, distillery yeast Saccharomyces cerevisiae and Kluyveromyces yeast have been studied using Jerusalem artichoke tubers. Two cultivars of Jerusalem artichoke: Albik and Rubik were used. Both acid and enzymatic hydrolysis were used to hydrolyse inulin into fermentable sugars. There was no use to hydrolyse inulin prior to fermentation with Kluyveromyces yeast. Fermentation with bacteria and distillery yeast was carried out at pH 5.5, 30oC while the time was 72-96 hours. The conditions were: pH 4.5, 35oC and 72-96 h when using Kluyveromyces yeast for fermentation. Fermentation of Jerusalem artichoke tubers by bacteria Zymomonas mobilis gave 86.11% and 90.02% theoretical yield of ethanol after acid and enzymatic hydrolysis of inulin, respectively. The distillery yeast Saccharomyces cerevisiae or Kluyveromyces yeast used for the mash fermentation allowed obtaining lower ethanol yield (80-84.15% of theoretical yield).

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EFFECT OF FRUCTANS ON GLUCOSE LEVEL IN BLOOD SERUM OF RATS – A SHORT REPORT

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eISSN:	2083-6007
ISSN:	1230-0322

W latach 2022-2024 kwartalnik naukowy Polish Journal of Food and Nutrition Sciences realizuje projekt nr RCN/SP/0520/2021/1 finansowany ze środków budżetu państwa – Ministerstwo Edukacji i Nauki w ramach programu „Rozwój czasopism naukowych”. Dofinansowanie wynosi 120 000 zł. W ramach projektu podejmowane są działania zmierzające do podniesienia poziomu praktyk wydawniczych i edytorskich, zwiększenia wpływu czasopism na rozwój nauki oraz utrzymania się czasopism w międzynarodowym obiegu naukowym.

In the years 2022-2024, the scientific quarterly Polish Journal of Food and Nutrition Sciences accomplishes a project no. RCN/SP/0520/2021/1 financed from the state budged – Ministry of Education and Science Republic of Poland in the framework of a program “Development of scientific journals”. The financing amounts to 120,000 PLN. The program aims at improving the level of publishing and editing practices, increasing the impact of scientific journals on science development, and extending the international range of scientific journals.