Polysaccharide production by Aureobasidium pullulans III. The influence of initial sucrose concentration on batch kinetics

Mohammad, Fawziyah; Badr-Eldin, Samir M.; El–Tayeb, O. M.; El‐Rahman, Ola A. Abd

doi:10.1016/0961-9534(95)00092-l

Cited by 24 publications

(24 citation statements)

References 9 publications

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“…In fact, subsequent studies, as well this one, reported that A. pullulans produces pullulan with better results for titer and yields for sucrose concentrations of around 50 g/L, and the sucrose was totally consumed by the end of the third day of process, on average (Gibson and Coughlin, 2002;Mohammad et al, 1995b;Leathers et al, 1988).…”

Section: Discussionmentioning

confidence: 99%

Enhanced production of pullulan by two strains of A. pullulans with different concentrations of soybean oil in sucrose solution in batch fermentations

Sena

Costelli

Gibson

et al. 2006

Braz. J. Chem. Eng.

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-Aureobasidium pullulans is a microorganism that produces pullulan (homopolysaccharide) extracellularly through a fermentation process with sugars (maltose, d-xylose, sucrose and starch) as its carbon source. Pullulan is a linear polysaccharide of D-glycopyranose containing (1 → 4)-α and (1 → 6)-α linkages at a 2:1 ratio, is highly soluble in water and has various applications in the food, packaging, film and pharmaceutical industries. Lipids, primarily oils, having antifoaming properties as well as nutritional particularities, are considered an essential additional carbon source for the growth of microorganisms, especially fungi. These nutrient sources are very important for the maintenance of microorganism cells. In fact, these positive effects are only achieved when the right source is added at both the right time and the right dosage into the broth of the fermentation process. In this research on pullulan production with the strains NRRL Y-6220 and NRRL Y-2311-1, it was found that the latter strain achieved better results for undesirable pigment formation, pullulan titer, time of maximum production (96 hours) and biomass yields than strain NRRL Y-6220, which also showed suitable results for biomass yields and cell morphology. However, the dark pigmentation of the strain NRRL Y-6220, formed through the process, makes its application unacceptable for foods and pharmaceuticals. Strain NRRL Y-2311-1 was shown to be a promising potential industrial microorganism, whose applications should be studied more in depth.

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Section: Discussionmentioning

confidence: 99%

Enhanced production of pullulan by two strains of A. pullulans with different concentrations of soybean oil in sucrose solution in batch fermentations

Sena

Costelli

Gibson

et al. 2006

Braz. J. Chem. Eng.

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“…Knowledge and an understanding of the kinetics of exopolysaccharide production are of great economic importance because exopolysaccharide production is important in many culture processes [46]. Recently, kinetic studies for several extracellular microbial polysaccharides in liquid static cultures of Ganoderma lucidum, Aureobasidium pullulans, and Pleurotus ferulae have been reported [47][48][49]. Despite a great need for the development of mushroom cultivation processes for efficient production of useful metabolites, until now there has been no report of their use in bioprocess modelling for large-scale cell growth and exopolysaccharide production with liquid culture of M. aitchisonii in an air-lift bioreactor.…”

Section: Kinetics Of Mycelial Growth and Exopolysaccharide Productionmentioning

confidence: 99%

A study of mycelial growth and exopolysaccharide production from a submerged culture of Mycoleptodonoides aitchisonii in an air-lift bioreactor

Choi

Lee

Kim

et al. 2011

Korean J. Chem. Eng.

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We determined the optimal culture and medium conditions for effective production of mycelial mass and exopolysaccharide from a liquid culture of Mycoleptodonoides aitchisonii in an air-lift bioreactor. The mycelial growth and exopolysaccharide production were found to be optimal at a temperature of 25 o C and pH of 6.5. When 60 g/L of lactose was used as a carbon source, the maximum mycelial growth and exopolysaccharide production were obtained. The polypeptone and yeast extract were the most appropriate nitrogen sources for mycelial growth and exopolysaccharide production. In addition, when a mixture of 20 g/L of polypeptone and 5 g/L of yeast extract was used, the exopolysaccharide production increased 50% compared to that of the sole nitrogen source. CaCl 2 ·2H 2 O (1.0 g/L) was the most effective mineral source. Using the optimal culture and medium conditions, batch cultures with basal and designed medium on mycelial growth and exopolysaccharide production in a 5 L air-lift bioreactor were carried out for 16 days. The mycelial growth and exopolysaccharide production increased with an increase of culture time at 14 days, and the maximum mycelial growth and exopolysaccharide production were 20.3 and 6.2 g/L, respectively, after 14 days of culture. The developed model in an air-lift bioreactor showed good agreement with experimental data. These results indicate that exopolysaccharide production is associated with the mycelial growth of M. aitchisonii in an air-lift bioreactor.

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“…Predictions of pullulan production based on biomass production would be valuable for practical purposes, because the biomass can be measured much faster or even in a continuous manner. Several attempts have been made to develop a model that describes the growth of pullulan producers and pullulan production (Klimek and Ollis, 1980;Thomson and Ollis, 1980;Boa and LeDuy, 1987;Mohammad et al, 1995). However, modeling that incorporates the results of comprehensive environmental growth conditions and their predicted kinetic parameters is rare.…”

Section: Introductionmentioning

confidence: 98%

“…The effects of carbon source (Mohammad et al, 1995;Madi et al, 1996), shear stress, agitation, aeration and dissolved oxygen levels Seviour, 1996, 1998), production enhancers (such as zinc and iron (Reeslev and Jensen, 1995)), and cell morphology (Ronen et al, 2002), have been studied to improve the production of high molecular weight, pure, and viscous pullulan. More statistically significant evaluations among these fermentation parameters have also been investigated by using response surface methodology (Goksungur et al, 2005;Urkut et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

Modeling of pullulan fermentation by using a color variant strain of Aureobasidium pullulans

Cheng

Demirci

Catchmark

et al. 2010

Journal of Food Engineering

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Polysaccharide production by Aureobasidium pullulans III. The influence of initial sucrose concentration on batch kinetics

Cited by 24 publications

References 9 publications

Enhanced production of pullulan by two strains of A. pullulans with different concentrations of soybean oil in sucrose solution in batch fermentations

Enhanced production of pullulan by two strains of A. pullulans with different concentrations of soybean oil in sucrose solution in batch fermentations

A study of mycelial growth and exopolysaccharide production from a submerged culture of Mycoleptodonoides aitchisonii in an air-lift bioreactor

Modeling of pullulan fermentation by using a color variant strain of Aureobasidium pullulans

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