Direct and quantitative conversion of starch to ethanol by the yeast Schwanniomyces alluvius

Calleja, G. B.; Levy-Rick, S.; Lusena, C. V.; Nasim, A.; Moranelli, F.

doi:10.1007/bf00131579

Cited by 45 publications

(7 citation statements)

References 4 publications

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“…Schmennfomyces species for ethanol production from starch has been proposed (Calleja et a~., 1982;Wilson e~ a~.,Ig82~ Frelot ~t a~., 1982;Moresi et a~., 1983). Economical utilization of these and other amylolytic species probably is not feasible due to their limited ethanol tolerance De ~ot e~ a~., 1984a).…”

Section: : Wilson Et E~01982) the Potential Application Ofmentioning

confidence: 99%

Production of extracellular debranching activity by amylolytic yeasts

1984

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Section: : Wilson Et E~01982) the Potential Application Ofmentioning

confidence: 99%

Production of extracellular debranching activity by amylolytic yeasts

1984

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“…198 1;SB-Correia and van Uden 198 1;Calleja et al 1982;Touzi et al 1982;Moresi et al 1982;Amin et al 1985;D e Mot, Van Dijck et al 1985). Simbes-Mendes (1982) also reported a high degree of starch assimilation by Trichosporon pullulans, comparable with the extent of starch utilization by Schwanniomyces alluvius.…”

Section: Introductionmentioning

confidence: 99%

Secretion of α-amylase and multiple forms of glucoamylase by the yeast Trichosporon pullulans

Mot¹,

Verachtert²

1986

Can. J. Microbiol.

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DE MOT, R., and H. VERACHTERT. 1986. Secretion of a-amylase and multiple forms of glucoamylase by the yeast Trichosporon pullulans. Can. J . Microbiol. 32: 47-51. Trichosporon pullulans IGC 3488 produced extracellular a-amylase and glucoamylase activities when grown in batches in a medium containing corn steep liquor and soluble starch or corn starch. a-Amylase, unlike glucoamylase activity, was secreted biphasically. For both amylases the maximum concentration was found in stationary phase cultures. The amylolytic enzymes, previously concentrated by ammonium sulfate precipitation, were separated into a glucoamylase fraction and an a-amylase fraction by Ultrogel AcA 54 gel filtration. Pullulanase activity was located in the glucoamylase fraction, whereas cyclodextrinase activity was restricted to the a-amylase fraction. Isoamylase and a-glucosidase were not detected. Electrophoretic analysis showed that a-amylase activity was due to a single protein. Glucoamylase, however, occurred in multiple forms. The four glucoamylases and the a-amylase were glycoproteins.DE MOT, R., et H. VERACHTERT. 1986. Secretion of a-amylase and multiple forms of glucoamylase by the yeast Trichosporon pullulans. Can. J. Microbiol. 32: 47-51. La levure Trichosporon pullulans IGC 3488, croissant en vrac dans un milieu contenant une solution de mais trempk, additionnke d'amidon soluble ou de fCcule de mais, a produit des activitiCs d'a-amylase et de glucoamylase extracellulaires. L'activitk de I'a-amylase, contrairement ti celle de la glucoamylase, fut sCcrktCe de f a~o n biphasique. La concentration maximale pour les deux types d'amylase a Ct C dCcelte dans les cultures en phase stationnaire. Les deux enzymes amylolytiques, prkalablement concentrkes par prkcipitation en prksence de sulfate d'amrnonium, ont Ct C skparkes par filtration sur Ultrogel AcA 54 en fraction glucoamylase et fraction a-amylase. Une activitC pullulanase a Ct C dCcelCe dans la fraction glucoamylase alors qu'une activitk cyclodextrinase fut strictement relike a la fraction a-amylase. I1 n'y a pas eu de dCtection d'isoamylase et d'a-glucosidase. L'activitk a-amylase mise en Cvidence par klectrophor&se s'est rCvClCe like 3 une seule protkine. Toutefois, la glycoamylase a prCsentC des formes multiples. Les quatre glucoamylases ainsi que I'a-amylase se sont avkr6es des glycoprotkines.[Traduit par la journal]

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“…Oxygen can be regarded as a nutrient as well as a regulator of microbial metabolism (Mukhopadhyay and Ghose, 1976). For example, low DOT levels have been reported to influence the formation of intracytoplasmic membranes (Post et al, 1979), the production and excretion of various metabolites (Akashi et al, 1979;Barnes et al, 1978;Calleja et al, 1986;Feren and Squires, 1969;Shibai et al, 1974), and in general can alter the metabolic pathways of facultative anaerobes (Bergersen et al, 1982;Heinemann et al, 1970;Mukhopadhyay and Ghose, 1976;Poole and Chance, 1981;Thomas et al, 1972). Even in the ethanol fermentation with Saccharomyces cerevisiae, traditionally regarded as an anaerobic process, DOT levels of about 0.05% air saturation and higher minimized loss of cell viability (Cysewski and Wilke, 1976;Nagodawithana et al, 1974).…”

Section: Introductionmentioning

confidence: 99%

An electromic controller for maintaining low dissolved oxygen levels in a bench-top fermentor

Preez

Hugo

1989

Biotechnol Tech

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Direct and quantitative conversion of starch to ethanol by the yeast Schwanniomyces alluvius

Abstract: The yeast Schwanniom?ces alluvius ferments soluble starch to ethanol at a conversion efficlen~---c~-of greater than 95%. Only trace amounts of side products are detectable.

Cited by 45 publications

References 4 publications

Production of extracellular debranching activity by amylolytic yeasts

Production of extracellular debranching activity by amylolytic yeasts

Secretion of α-amylase and multiple forms of glucoamylase by the yeast Trichosporon pullulans

An electromic controller for maintaining low dissolved oxygen levels in a bench-top fermentor

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