Squalene versus Ergosterol Formation Using Saccharomyces cerevisiae: Combined Effect of Oxygen Supply, Inoculum Size, and Fermentation Time on Yield and Selectivity of the Bioprocess

2009 ◽  
Vol 57 (14) ◽  
pp. 6189-6198 ◽  
Author(s):  
Fani Mantzouridou ◽  
Eleni Naziri ◽  
Maria Z. Tsimidou
Keyword(s):  
Saccharomyces Cerevisiae ◽  
Oxygen Supply ◽  
Inoculum Size ◽  
Combined Effect ◽  
Fermentation Time ◽  
Effect Of Oxygen

scholarly journals Optimization of alcoholic fermentation of custard apple juice by Saccharomyces cerevisiae using response surface methodology

2019 ◽  
Vol 18 (5) ◽  
pp. 70-78
Author(s):  
Huan T. Phan
Keyword(s):  
Saccharomyces Cerevisiae ◽  
Apple Juice ◽  
Alcoholic Fermentation ◽  
Apple Fruit ◽  
Inoculum Size ◽  
Solid Content ◽  
Soluble Solid Content ◽  
Fermentation Time ◽  
Custard Apple ◽  
Soluble Solid

In recent years, custard apple fruit has been applied in food processing with various products. The objective of this study was to valorize a fermented fruit drink from a Vietnamese local custard apple fruit by the alcoholic fermentation of the juice using Saccharomyces cerevisiae. Response surface methodology was used to describe dependency of soluble solid content, inoculum size of yeast and fermentation time on ethanol production during fermentation of custard apple juice by Saccharomyces cerevisiae SLS. The experiments were performed according to the central composite design with total soluble solid content ranging from 16 to 20oBrix, inoculum size of yeast from 1% to 3%, and fermentation time from 42 to 48 h. A quadratic model was developed to correlate the variables to the ethanol yield and sensory score. The results showed that a production of ethanol from the custard apple juice could be achieved reaching up to 5.1% (v/v) at optimum conditions of 19oBrix, 2% yeast and 44-h fermentation time. The model predictions agreed satisfactorily with the experimental values

scholarly journals The Production of Bioethanol from Rimau Gerga Lebong (Rgl) Orange Waste as an Alternative Energy

2018 ◽  
Vol 248 ◽  
pp. 04004
Author(s):  
Vike Darliyasi ◽  
Kurnia Herlina Dewi ◽  
Budiyanto
Keyword(s):  
Saccharomyces Cerevisiae ◽  
Alternative Energy ◽  
Block Design ◽  
Trichoderma Viride ◽  
Total Dissolved Solids ◽  
Dissolved Solids ◽  
Fermentation Time ◽  
Ethanol Content ◽  
Significant Difference ◽  
Orange Waste

Bioethanol from Rimau Gerga Lebong (RGL) orange waste is one of the solution to overcome fuel oil problem. The aim of this research is to get the type of microorganisms and fermentation time that produce the highest ethanol from RGL orange waste. The research method used was Randomized Block Design (RBD) of two factors, namely type of microorganisms (Trichoderma viride, Saccharomyces cerevisiae, and Trichoderma viride + Saccharomyces cerevisiae) and fermentation time (3 days, 5 days, and 7 days. Within the three type of microorganisms with variations of fermentation time showed that the pH was able to carry out the fermentation process smoothly. The highest total dissolved solids were in the type of Trichoderma viride 3 days and 5 days, and the type of mix of microorganisms on the 3rd day. The highest ethanol content is in the type of Sachharomyces cerevisiae for 7 days. ANOVA result showed that the interaction between two treatments on the total dissolved solids experienced significant differences, so it continue with the DMRT test at a significant level of 0.5%. However, it is different from the results of ANOVA on ethanol content which showed that there were significant differences between ethanol content and types of microorganisms, but there was no significant difference on fermentation time

Limitation of theophylline elimination by reduced oxygen availability in mouse hepatocytes and rat isolated livers

1985 ◽  
Vol 63 (8) ◽  
pp. 903-907 ◽  
Author(s):  
Kanji Nakatsu
Keyword(s):  
Oxygen Supply ◽  
Correlation Coefficients ◽  
Oxygen Availability ◽  
Isolated Perfused Rat Liver ◽  
Mouse Hepatocyte ◽  
Mouse Hepatocytes ◽  
Per Se ◽  
Theophylline Metabolism ◽  
Effect Of Oxygen ◽  
Rat Livers

The effect of oxygen availability on theophylline metabolism by mouse hepatocytes and rat isolated livers was examined. The elimination of theophylline by mouse hepatocytes and the metabolism of theophylline to dimethyluric acid by isolated, perfused rat livers was seriously impaired when the gas mixture supplied contained less than 28% oxygen. The correlation coefficients relating oxygen supply and the concentration of theophylline remaining in mouse hepatocyte suspensions were −0.74 to −0.84. In the isolated, perfused rat liver experiments, the correlation coefficient relating oxygen availability and dimethyluric acid production was 0.87. These observations are interpreted as supporting the hypothesis that oxygen availability per se is an important factor in determining the rate of theophylline metabolism.

Differential effect of oxygen supply and lactate concentration on keratan sulphate and glycoseminoglycuronan production in bovine cornea

1991 ◽  
Vol 19 (4) ◽  
pp. 354S-354S ◽  
Author(s):  
CESARE BALDUINI ◽  
GLANCARLO DE LUCA ◽  
ALBERTO PASSI ◽  
SIMONETTA RINDI ◽  
ROBERTA SALVINI ◽  
...  
Keyword(s):  
Differential Effect ◽  
Oxygen Supply ◽  
Lactate Concentration ◽  
Keratan Sulphate ◽  
Effect Of Oxygen

Effect of oxygen and bismuth impurities on the structural and physicochemical properties of nickel melts

2021 ◽  
Vol 1 ◽  
pp. 73-83
Author(s):  
K.S. Filippov ◽  
Keyword(s):  
Surface Tension ◽  
Physicochemical Properties ◽  
Pure Nickel ◽  
The State ◽  
Combined Effect ◽  
Negative Deviation ◽  
Raoult’S Law ◽  
Compression Effect ◽  
Heat Resistant ◽  
Effect Of Oxygen

There are practically no data in the literature on the combined effect of oxygen and bismuth impurities on the structural and physicochemical properties of nickel melts or heat-resistant alloys based on it. In the presented work, the state of pure nickel and nickel melts containing (0.005-0.01) bismuth and oxygen is considered in the process of refining from oxygen and bismuth impurities. The influence of these impurities on the structural and physicochemical properties was studied, which was evaluated by the parameters of the density and surface tension of the melts. In nickel melts with bismuth and oxygen, a compression effect and a negative deviation from Raoult’s law were observed. The effect of an increase in the surface tension of a nickel melt containing oxygen with an increase in the concentration of bismuth is found, which corresponds to the isotherm of desorption of excess substance from the surface into the bulk.

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