Xylose fermentation to ethanol by newGalactomyces geotrichumandCandida akabanensisstrains

Abstract

The conversion of pentoses into ethanol remains a challenge and could increase the supply of second-generation biofuels. This study sought to isolate naturally occurring yeasts from plant biomass and determine their capabilities for transforming xylose into ethanol. Three yeast strains with the ability to ferment xylose were isolated from pepper, tomato and sugarcane bagasse. The strains selected were characterized by morphological and auxanographic assays, and they were identified by homology analysis of 5.8 S and 26 S ribosomal RNA gene sequences. The identities of two lineages of microrganism were associated with Galactomyces geotrichum, and the other was associated with Candida akabanensis. Fermentative processes were conducted with liquid media containing only xylose as the carbon source. YP/S values for the production of ethanol ranging between 0.29 and 0.35 g g−1 were observed under non-optimized conditions.

Phylogenetic and genomic analyses of two new species of Clavispora (Metschnikowiaceae, Saccharomycetales) from Central China

“…lusitaniae can be pathogenic to humans and is responsible for about 1% of invasive candidiasis cases, particularly in pediatric and hematology–oncology patients ( Merz et al, 1992 ; Favel et al, 2003 ). Some species in this clade, such as Candida akabanensis , C. xylosifermentans , and Cl opuntiae, were found to ferment D-xylose, which is the second most abundant sugar in plant cell-wall carbohydrates ( Phaff et al, 1986 ; Lachance et al, 2011 ; Valinhas et al, 2018 ; Kaewwichian et al, 2019 ). The ability of yeasts to ferment D-xylose is of interest because such yeasts can be applied to bioethanol production from lignocellulosic biomass ( Agbogbo and Wenger, 2007 ; Urbina et al, 2013 ).…”

Desenvolvimento E Caracterização Físico-Química De Macarrão Com Substituição Parcial Da Farinha De Trigo Por Farinha De Polpa De Baru

“…Nos anos 2000, novas linhagens naturalmente capazes de fermentar pentoses foram descritas, tais como Spathaspora passalidarum (NGUYEN et al, 2006;HOU, 2012) e Spathaspora arboriae (CADETE et al, 2009;CUNHA-PEREIRA et al, 2011) (RYABOVA et al, 2003;DMYTRUK et al, 2008;GALAFASSI et al, 2011;NITIYON et al, 2011;RODRUSSAMEE et al, 2011;VERHO et al, 2011;CADETE et al, 2013;DOGARIS et al, 2013;LORLIAM et al, 2013;KALHORINIA et al, 2014;SUKPIPAT et al, 2017;MATOS et al, 2017;VALINHAS et al, 2018). Nesta mesma década, Barbosa (2017) fez o primeiro relato na literatura da espécie Sporothrix schenckii, anteriormente mencionada apenas como causadora de doença, como sendo capaz de converter xilose em bioetanol.…”

Avaliação Do Equilíbrio E Da Cinética De Adsorção Do Corante Modelo Azul De Metileno Empregando Biocarvão De Macadâmia

“…Nos anos 2000, novas linhagens naturalmente capazes de fermentar pentoses foram descritas, tais como Spathaspora passalidarum (NGUYEN et al, 2006;HOU, 2012) e Spathaspora arboriae (CADETE et al, 2009;CUNHA-PEREIRA et al, 2011) (RYABOVA et al, 2003;DMYTRUK et al, 2008;GALAFASSI et al, 2011;NITIYON et al, 2011;RODRUSSAMEE et al, 2011;VERHO et al, 2011;CADETE et al, 2013;DOGARIS et al, 2013;LORLIAM et al, 2013;KALHORINIA et al, 2014;SUKPIPAT et al, 2017;MATOS et al, 2017;VALINHAS et al, 2018). Nesta mesma década, Barbosa (2017) fez o primeiro relato na literatura da espécie Sporothrix schenckii, anteriormente mencionada apenas como causadora de doença, como sendo capaz de converter xilose em bioetanol.…”