Your browser doesn't support javascript.
loading
An original method for producing acetaldehyde and diacetyl by yeast fermentation
Rosca, Irina; Petrovici, Anca Roxana; Brebu, Mihai; Stoica, Irina; Minea, Bogdan; Marangoci, Narcisa.
  • Rosca, Irina; "Petru Poni" Institute of Macromolecular Chemistry. Advanced Research Center for Bionanoconjugates and Biopolymers. Iasi. RO
  • Petrovici, Anca Roxana; "Petru Poni" Institute of Macromolecular Chemistry. Advanced Research Center for Bionanoconjugates and Biopolymers. Iasi. RO
  • Brebu, Mihai; "Petru Poni" Institute of Macromolecular Chemistry. Advanced Research Center for Bionanoconjugates and Biopolymers. Iasi. RO
  • Stoica, Irina; "Petru Poni" Institute of Macromolecular Chemistry. Advanced Research Center for Bionanoconjugates and Biopolymers. Iasi. RO
  • Minea, Bogdan; "Petru Poni" Institute of Macromolecular Chemistry. Advanced Research Center for Bionanoconjugates and Biopolymers. Iasi. RO
  • Marangoci, Narcisa; "Petru Poni" Institute of Macromolecular Chemistry. Advanced Research Center for Bionanoconjugates and Biopolymers. Iasi. RO
Braz. j. microbiol ; 47(4): 949-954, Oct.-Dec. 2016. tab, graf
Article in English | LILACS | ID: biblio-828194
ABSTRACT
Abstract In this study a natural culture medium that mimics the synthetic yeast peptone glucose medium used for yeast fermentations was designed to screen and select yeasts capable of producing high levels of diacetyl and acetaldehyde. The presence of whey powder and sodium citrate in the medium along with manganese and magnesium sulfate enhanced both biomass and aroma development. A total of 52 yeasts strains were cultivated in two different culture media, namely, yeast peptone glucose medium and yeast acetaldehyde-diacetyl medium. The initial screening of the strains was based on the qualitative reaction of the acetaldehyde with Schiff's reagent (violet color) and diacetyl with Brady's reagent (yellow precipitate). The fermented culture media of 10 yeast strains were subsequently analyzed by gas chromatography to quantify the concentration of acetaldehyde and diacetyl synthesized. Total titratable acidity values indicated that a total titratable acidity of 5.5 °SH, implying culture medium at basic pH, was more favorable for the acetaldehyde biosynthesis using strain D15 (Candida lipolytica; 96.05 mg L-1 acetaldehyde) while a total titratable acidity value of 7 °SH facilitated diacetyl flavor synthesis by strain D38 (Candida globosa; 3.58 mg L-1 diacetyl). Importantly, the results presented here suggest that this can be potentially used in the baking industry.
Subject(s)


Full text: Available Index: LILACS (Americas) Main subject: Hepatitis B virus / Hepatitis C / Hepacivirus / Viral Load / Hepatitis B Type of study: Diagnostic study / Qualitative research Limits: Humans Language: English Journal: Braz. j. microbiol Journal subject: Microbiology Year: 2016 Type: Article Affiliation country: Romania Institution/Affiliation country: "Petru Poni" Institute of Macromolecular Chemistry/RO

Similar

MEDLINE

...
LILACS

LIS


Full text: Available Index: LILACS (Americas) Main subject: Hepatitis B virus / Hepatitis C / Hepacivirus / Viral Load / Hepatitis B Type of study: Diagnostic study / Qualitative research Limits: Humans Language: English Journal: Braz. j. microbiol Journal subject: Microbiology Year: 2016 Type: Article Affiliation country: Romania Institution/Affiliation country: "Petru Poni" Institute of Macromolecular Chemistry/RO