Please use this identifier to cite or link to this item: http://hdl.handle.net/10174/23830

Title: Aerobic fermentation of Saccharomyces cerevisiae may be reversed by exposure to titanium dioxide nanoparticles under heat shock
Authors: Capela-Pires, J
Ferreira, R
Alves-Pereira, I
Editors: Méndez-Vilas, A.
Keywords: yeast cell viability
pyruvate decarboxylase
alcohol dehydrogenase
nanomaterials
temperature
Issue Date: 2018
Publisher: Boca Raton, Florida USA: BrownWalker Press/Universal Publishers Inc.
Citation: Capela-Pires J, Ferreira R, Alves-Pereira I. (2018) Chapter title: Aerobic fermentation of Saccharomyces cerevisiae may be reversed by exposure to titanium dioxide nanoparticles under heat shock, In: A. Méndez-Vilas (ed), Exploring Microorganisms: Recent Advances in Applied Microbiology, 1sd ed. Boca Raton, Florida USA: BrownWalker Press/Universal Publishers Inc., pp 271-275 (both included). ISBN-10: 1-62734-623-6; ISBN-13: 978-1-62734-623-8
Abstract: Saccharomyces cerevisiae preferentially uses its own fermentative metabolism when grown in glucose-rich media, even under fully aerobic conditions. This process involves the decarboxylation of pyruvate to acetaldehyde by means of pyruvate decarboxylase, followed by the reduction of acetaldehyde to ethanol, catalysed by alcohol dehydrogenase. Although nanoparticles may disturb biochemical processes, no studies were found which describe the modulation of energetic metabolism by nanoparticles under heat shock conditions. In this paper, it was observed that the addition of glucose to S. cerevisiae UE-ME3 grown in a respiratory medium caused an increase in cell viability and in the fermentative enzyme activities. In addition, yeast cells grown in respiratory-fermentative conditions exposed to titanium dioxide nanoparticules <100 (5 μg/mL) and heat shock (28/40 °C), in the last 100 min of the culture, showed a negative modulation of the aerobic fermentation in this wild-type wine yeast from the Alentejo (Portugal).
URI: http://www.universal-publishers.com/book.php?book=1627346236
http://hdl.handle.net/10174/23830
ISBN: ISBN-10: 1-62734-623-6
ISBN-13: 978-1-62734-623-8
Type: article
Appears in Collections:ICAAM - Artigos em Livros de Actas/Proceedings

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