Technical Note:Electrochemical and Chemical Complications Resulting from Yeast Extract Addition to Stimulate Microbial Growth

CORROSION ◽  
10.5006/1833 ◽  
2015 ◽  
Vol 71 (12) ◽  
pp. 1434-1440 ◽  
Author(s):  
Jason S. Lee ◽  
Brenda J. Little
Keyword(s):  
Yeast Extract ◽  
Microbial Growth

scholarly journals Which Microbial Growth Model Best Fits to Fusarium graminearum?

2018 ◽  
Author(s):  
Edgar Cambaza
Keyword(s):  
Linear Model ◽  
Fusarium Graminearum ◽  
Growth Model ◽  
Yeast Extract ◽  
Microbial Growth ◽  
Growth Models ◽  
Head Blight ◽  
Actual Growth ◽  
Imagej Software ◽  
Yeast Extract Agar

Fusarium graminearum causes head blight in wheat and corn, and produces chemicals harmful for humans and other animals. It is important to understand how it grows in order to prevent outbreaks. There are 3 well-known growth models for microorganisms and they seem applicable to molds: linear, Gompertz and Baranyi. This study aimed to see which could better represent F. graminearum growth. Three replicates were grown in yeast extract agar (YEA) for 20 days. The Feret’s radius was measured in ImageJ software, and then related to the models. Linear model was the most closely correlated to the actual growth. Thus, considering that it was the most representative of the reality and it is easier to use, it seems to be the best logical choice for F. graminearum growth studies.

Acceleration of yoghurt fermentation time by yeast extract and partial characterisation of the active components

2014 ◽  
Vol 81 (4) ◽  
pp. 417-423 ◽  
Author(s):  
Esti-Andrine Smith ◽  
Jacobus Myburgh ◽  
Gernot Osthoff ◽  
Maryna de Wit
Keyword(s):  
Yeast Extract ◽  
Free Amino ◽  
Microbial Growth ◽  
Water Soluble ◽  
Size Exclusion ◽  
Low Molecular Weight ◽  
Active Components ◽  
Fermentation Time ◽  
Exclusion Chromatography ◽  
Partial Characterisation

Water soluble autolysate of yeast, usually utilised for microbial growth support, was used as additive in yoghurt fermentation. The yeast extract (YE) resulted in a decrease of fermentation time by 21% to reach a pH of 4·6. However, the YE resulted in unacceptable flavour and taste. By size exclusion chromatography, a fraction of the YE was obtained that could account for the observed 21% decrease in fermentation time. The fraction contained molecules of low molecular weight, consisting of minerals, free amino acids and peptides. The acceleration of the yoghurt fermentation was ascribed to the short peptides in the fraction. It is proposed that the application of this extract in industrial yoghurt manufacture would result in savings for both the industry and the consumer.

Black box modeling approaches to judge the influence of a yeast extract on microbial growth and production

2020 ◽  
Vol 92 (9) ◽  
pp. 1338-1338
Author(s):  
S. Kaul ◽  
N. Esfandiari ◽  
M. Scheunemann ◽  
G. Cornelissen
Keyword(s):  
Yeast Extract ◽  
Microbial Growth ◽  
Black Box ◽  
Modeling Approaches

THE FEATURES OF BIODESTRUCTION PROCESSES OF THE SURFACES OF HYDRAULIC ENGINEERING CONSTRUCTIONS

2017 ◽  
Author(s):  
Marina Vasilenko ◽  
Marina Vasilenko ◽  
Elena Goncharova ◽  
Elena Goncharova ◽  
Yury Rubanov ◽  
...  
Keyword(s):  
Surface Layer ◽  
Environmental Factors ◽  
Food Chain ◽  
Building Materials ◽  
Microbial Growth ◽  
Mineralogical Composition ◽  
Mechanical Action ◽  
Chemical Processes ◽  
Hydraulic Engineering ◽  
Optimal Conditions

The surfaces of building materials of hydrotechnical constructions undergo the process of algae biofouling. The degree of damage depends on the environmental factors that are affect-ed by the level of anthropogenic load areas. Modeling the biofouling process of concrete with algae under laboratory conditions has allowed determining their impact on the building ma-terial, accompanied by changes in chemical and mineralogical composition of the surface of products. The microscopic examination of sample’s surfaces and evaluation of the effective-ness of various ions leaching from building materials shows the results of "algal attack" relat-ed to the acceleration of biodegradation of materials under the influence of aggressive meta-bolic products, mechanical action neoplasms, creating optimal conditions for the development of subsequent aerobic microbial decomposers. To clarify the nature of chemical processes in the system “algocenosis – concrete” the changes of chemical and phase (mineralogical) com-position of the surface layer of concrete sample were studied. The effect that algae produce on hydraulic engineering constructions is due to the fact that these organisms, belonging to phototrophs and standing at the beginning of the food chain, initiate new microbial growth.

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