The effect of microbial arabinoxylanases on premature yeast flocculation

2020 ◽  
Vol 126 (3) ◽  
pp. 298-305
Author(s):  
Yueling Shang ◽  
Dujun Wang ◽  
Guolin Cai ◽  
Junyong Sun ◽  
Fengwei Li ◽  
...  
Keyword(s):  
Yeast Flocculation

Malt-induced premature yeast flocculation: current perspectives

2012 ◽  
Vol 39 (6) ◽  
pp. 813-822 ◽  
Author(s):  
Apostolos G. Panteloglou ◽  
Katherine A. Smart ◽  
David J. Cook
Keyword(s):  
Yeast Flocculation

scholarly journals Mitochondrial Associated Yeast Flocculation -The Effect of Acetylsalicylic Acid

2007 ◽  
Vol 113 (1) ◽  
pp. 42-47 ◽  
Author(s):  
C.J. Strauss ◽  
P.W.J. Wyk ◽  
E.J. Lodolo ◽  
P.J. Botes ◽  
C.H. Pohl ◽  
...  
Keyword(s):  
Acetylsalicylic Acid ◽  
Yeast Flocculation

Role of cations in the flocculation of Saccharomyces cerevisiae and discrimination of the corresponding proteins

1991 ◽  
Vol 37 (5) ◽  
pp. 397-403 ◽  
Author(s):  
Hiroshi Kuriyama ◽  
Itaru Umeda ◽  
Harumi Kobayashi
Keyword(s):  
Saccharomyces Cerevisiae ◽  
Cell Surface ◽  
Inhibitory Effect ◽  
Surface Proteins ◽  
Promoting Effect ◽  
Yeast Strains ◽  
Yeast Flocculation ◽  
Different Types ◽  
Anionic Groups

Asexual yeast flocculation was studied using strong flocculents of Saccharomyces cerevisiae. The inhibitory effect of cations on flocculation is considered to be caused by competition between those cations and Ca2+ at the binding site of the Ca2+-requiring protein that is involved in flocculation. Inhibition of flocculation by various cations occurred in the following order: La3+, Sr2+, Ba2+, Mn2+, Al3+, and Na+. Cations such as Mg2+, Co2+, and K+ promoted flocculation. This promoting effect may be based on the reduction of electrostatic repulsive force between cells caused by binding of these cations anionic groups present on the cell surface. In flocculation induced by these cations, trace amounts of Ca2+ excreted on the cell surface may activate the corresponding protein. The ratio of Sr2+/Ca2+ below which cells flocculated varied among strains: for strains having the FLO5 gene, it was 400 to 500; for strains having the FLO1 gene, about 150; and for two alcohol yeast strains, 40 to 50. This suggests that there are several different types of cell surface proteins involved in flocculation in different yeast strains. Key words: yeast, flocculation, protein, cation, calcium.

Yeast flocculation and its biotechnological relevance

2010 ◽  
Vol 88 (1) ◽  
pp. 31-39 ◽  
Author(s):  
Florian F. Bauer ◽  
Patrick Govender ◽  
Michael C. Bester
Keyword(s):  
Yeast Flocculation

scholarly journals Yeast Flocculation Mediated by Overexpression of the Chitin Synthase 2 Gene in Saccharomyces cerevisiae.

1991 ◽  
Vol 55 (11) ◽  
pp. 2901-2903 ◽  
Author(s):  
Masayuki SUDOH ◽  
Hisao SHIMADA ◽  
Mikio ARISAWA ◽  
Keiji YANO ◽  
Masamichi TAKAGI
Keyword(s):  
Saccharomyces Cerevisiae ◽  
Chitin Synthase ◽  
Yeast Flocculation

Calcium activity versus "calcium threshold" as the key factor in the induction of yeast flocculation in simulated industrial fermentations

1991 ◽  
Vol 37 (4) ◽  
pp. 295-303 ◽  
Author(s):  
Charlotte L. Masy ◽  
Myriam Kockerols ◽  
Michèle M. Mestdagh
Keyword(s):  
Calcium Concentration ◽  
Chelating Agents ◽  
Laboratory Culture ◽  
Culture Conditions ◽  
Free Calcium ◽  
Yeast Saccharomyces Cerevisiae ◽  
Calcium Activity ◽  
Yeast Flocculation ◽  
Key Factor ◽  
Two Parameters

Yeast flocculation is regulated by two parameters: the free-calcium activity and the "calcium threshold" or the quantity of calcium at which cells flocculate in a turbidimetric test. The study of the influence of different factors such as calcium concentration, pH, and chelating agents on flocculation has led us to put forward the following hypothesis. Flocculation occurs when the calcium threshold becomes equal to free-calcium activity, i.e., when the medium contains the exact quantity of calcium necessary for flocculation to occur. This hypothesis has been confirmed under standard laboratory culture conditions and in simulated industrial fermentations. Key words: flocculation, yeast, Saccharomyces cerevisiae, calcium induction.

scholarly journals Epigenetic mutagen as histone modulator can be detected by yeast flocculation

Mutagenesis ◽  
2016 ◽  
Vol 31 (6) ◽  
pp. 687-693 ◽  
Author(s):  
Kei-ichi Sugiyama ◽  
Hiroko Furusawa ◽  
Masatomi Shimizu ◽  
Petr Grúz ◽  
Masamitsu Honma
Keyword(s):  
Yeast Flocculation

Yeast flocculation: Calcium specificity

Yeast ◽  
1989 ◽  
Vol 5 (6) ◽  
pp. 487-496 ◽  
Author(s):  
Malcolm Stratford
Keyword(s):  
Yeast Flocculation
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