The STUDIA UNIVERSITATIS BABEŞ-BOLYAI issue article summary

The summary of the selected article appears at the bottom of the page. In order to get back to the contents of the issue this article belongs to you have to access the link from the title. In order to see all the articles of the archive which have as author/co-author one of the authors mentioned below, you have to access the link from the author's name.

 
       
         
    STUDIA BIOLOGIA - Issue no. 1 / 2001  
         
  Article:   INFLUENŢA UNOR METALE GRELE ASUPRA METABOLISMULUI CELULAR AL DROJDIILOR.

Authors:  LETIŢIA OPREAN.
 
       
         
  Abstract:  Influence of Some Heavy Metals on the Metabolism of Yeast Cells. The paper presents the results of a comparative research on the influence of some heavy metals (Cd, Pb, Cu, Mn and Zn) on the cell metabolism of the beer yeast Saccharomyces carlsbergensis. During the alcoholic fermentation we have examined the dynamics of the wort fermentation due to the yeast, in the presence of these metals, measuring the amount of CO2 produced in 24 hours and the number of the living yeast cells in the wort, using standard methods. The results have shown that the heavy metals have a differentiated toxic effect on the yeast cell metabolism. The toxic effect can be correlated both to the specific action of each metal and to the metal amount in the fermentation medium. It can be determined a certain order of the toxicity degree of the studied metals on the fermentation dynamics of the wort and on the number of the living yeast cells in wort. Thus, the decreasing order of the toxicity degree of the studied metals is: Cd>Pb>Cu>Mn>Zn. The beer yeast Saccharomyces carlsbergensis can be used as a bioindicator for the heavy metals existing in food.  
         
     
         
         
      Back to previous page