Cellulolytic complex of Aspergillus niger under conditions for citric acid production. Isolation and characterization of two ?-(1?4)-glucan hydrolases

1984 ◽  
Vol 20 (5) ◽  
pp. 326-330 ◽  
Author(s):  
Smilja Vidmar ◽  
Vito Turk ◽  
Igor Kregar
Keyword(s):  
Citric Acid ◽  
Aspergillus Niger ◽  
Acid Production ◽  
Citric Acid Production ◽  
Isolation And Characterization

Isolation and characterization of a Saccharomycopsis lipolytica mutant showing increased production of citric acid from canola oil

1985 ◽  
Vol 31 (5) ◽  
pp. 436-440 ◽  
Author(s):  
David W. Good ◽  
Randal Droniuk ◽  
G. Ross Lawford ◽  
Jared E. Fein
Keyword(s):  
Citric Acid ◽  
Canola Oil ◽  
Acid Production ◽  
Phosphoenolpyruvate Carboxykinase ◽  
Citric Acid Production ◽  
Isocitric Acid ◽  
Isolation And Characterization ◽  
Saccharomycopsis Lipolytica ◽  
Acid Ratio

A process for the production of citric acid from canola (rapeseed) oil using the yeast Saccharomycopsis lipolytica was examined. A citrate nonutilizing strain, designated NTG9, which had an improved citric to isocitric acid ratio, was isolated after mutagenesis of S. lipolytica ATCC 20228 with nitrosoguanidine. Although the mutant grew well on canola oil, unlike the parent strain or a spontaneous revertant (JF2), it did not grow on glycolytic intermediates below glycerate-3-phosphate, amino acids, hexadecane, or yellow kerosene. The mutant was shown to be impaired in the gluconeogenic pathway because of a loss of phosphoenolpyruvate carboxykinase activity. A preliminary study of the effect of micronutrients on citric acid production by S. lipolytica NTG9 showed that manganese had a stimulatory effect on the process whereas zinc and iron were inhibitory. A revised growth medium was tested and found to increase citric acid production while decreasing that of isocitric acid.

scholarly journals The Effect of Lipids on Citric Acid Production by an Aspergillus niger Mutant

1963 ◽  
Vol 30 (3) ◽  
pp. 365-379 ◽  
Author(s):  
N. F. MILLIS ◽  
B. H. TRUMPY ◽  
B. M. PALMER
Keyword(s):  
Citric Acid ◽  
Aspergillus Niger ◽  
Acid Production ◽  
Citric Acid Production

Optimization of Trace Metals Concentration on Citric Acid Production by Aspergillus niger NRRL 2001

2007 ◽  
Vol 1 (3) ◽  
pp. 246-253 ◽  
Author(s):  
A. A. Guilherme ◽  
G. A. S. Pinto ◽  
S. Rodrigues
Keyword(s):  
Citric Acid ◽  
Trace Metals ◽  
Aspergillus Niger ◽  
Acid Production ◽  
Citric Acid Production

EFFECT OF FERROCYANIDE ON GROWTH AND CITRIC ACID PRODUCTION BY ASPERGILLUS NIGER

1966 ◽  
Vol 12 (5) ◽  
pp. 901-907 ◽  
Author(s):  
H. Horitsu ◽  
D. S. Clark
Keyword(s):  
Citric Acid ◽  
Aspergillus Niger ◽  
Acid Production ◽  
Krebs Cycle ◽  
Acid Formation ◽  
Citric Acid Production ◽  
Resting Cells ◽  
Acid Yield ◽  
Beet Molasses ◽  
Inhibition Of Growth

Ferrocyanide at concentrations of less than 30 p.p.m. (the amount tolerated in citric acid fermentation of beet molasses) had no measurable effect on citric acid production or on the oxidation of glucose or Krebs cycle compounds by resting cells of Aspergillus niger or on the growth rate of this organism during submerged fermentation of beet molasses. Concentrations above 30 p.p.m., however, stimulated citric acid formation in resting cells, but markedly inhibited cell development in growing cells. This inhibition of growth was the main cause of the detrimental effect of high concentrations of ferrocyanide on citric acid formation in molasses; good growth throughout the fermentation was essential to high acid yield, inhibition of growth could be released at any time during the fermentation by addition of sufficient ZnSO4 to reduce the ferrocyanide content to below 30 p.p.m. No evidence that ferrocyanide favors citric acid accumulation by blocking a reaction in the Krebs cycle was found.

Morphological regulation of Aspergillus niger to improve citric acid production by chsC gene silencing

2018 ◽  
Vol 41 (7) ◽  
pp. 1029-1038 ◽  
Author(s):  
Xiaowen Sun ◽  
Hefang Wu ◽  
Genhai Zhao ◽  
Zhemin Li ◽  
Xihua Wu ◽  
...  
Keyword(s):  
Citric Acid ◽  
Aspergillus Niger ◽  
Gene Silencing ◽  
Acid Production ◽  
Citric Acid Production
Sign in / Sign up

Export Citation Format

Share Document