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The advancement of knowledge about the physiology of Dekkera bruxellensis has shown its potential for the production of fuel ethanol very close to the conventional fermenting yeast S. cerevisiae. However, some aspects of its metabolism remain uncovered. In the present study, the respiro-fermentative parameters of D. bruxellensis GDB 248 were evaluated under different cultivation conditions. The results showed that sucrose was more efficiently converted to ethanol than glucose, regardless the nitrogen source, which points out for the industrial efficiency of this yeast in sucrose-based substrate. The blockage of the cytosolic acetate production incremented the yeast fermentative efficiency by 27% (in glucose) and 14% (in sucrose). On the other hand, the presence of nitrate as inducer of acetate production reducing the production of ethanol. Altogether, these results settled the hypothesis that acetate metabolism is the main constraint for ethanol production. Besides, this acetate-generating pathway seems to exert some regulatory action on the flux and distribution of the carbon flowing through the central metabolism. These physiological aspects were corroborated by the relative expression analysis of key genes in the crossroad to ethanol, acetate and biomass formation. All the results were discussed in the light of the industrial potential of this yeast.
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http://dx.doi.org/10.1016/j.jbiotec.2022.06.008 | DOI Listing |
Front Plant Sci
December 2024
Unit for Environment Science and Management, North-West University, Potchefstroom, South Africa.
Maize ( L.), a key staple crop in Sub-Saharan Africa, is particularly vulnerable to concurrent drought and heat stress, which threatens crop yield and food security. Plant growth-promoting rhizobacteria (PGPR) have shown potential as biofertilizers to enhance plant resilience under such abiotic stresses.
View Article and Find Full Text PDFShanghai Kou Qiang Yi Xue
October 2024
Department of General Dentistry, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine; College of Stomatology, Shanghai Jiao Tong University; National Center for Stomatology; National Clinical Research Center for Oral Diseases; Shanghai Key Laboratory of Stomatology; Shanghai Research Institute of Stomatology. Shanghai 200011, China. E-mail:
Purpose: To evaluate the efficacy of micro-computed tomography(Micro-CT) in removing calcium hydroxide from posterior curved root canals.
Methods: Twenty molar teeth (48 root canals) extracted at the Department of General Dentistry, Shanghai Ninth People's Hospital between December 2023 and February 2024 were collected. After preparing by Ni-TI instruments M3 according to standard root canal treatment procedures, calcium hydroxide was injected into the root canals.
Biomed Pharmacother
December 2024
Department of Pharmacy, School of Medicine, University of Naples Federico II, Naples, Italy. Electronic address:
Mast cell-mediated reactions promote various allergic disease, including anaphylaxis, allergic rhinitis, asthma, and atopic dermatitis. Different data demonstrated an intricate relationship between the use of antihistaminic drugs, the onset of side effects, and the development of resistance, underscoring the importance to find novel therapeutic approaches to treat allergic diseases. Olive leaf extract (OLE), is a by-product of the olive tree rich in bioactive compounds, known for its numerous therapeutic properties, including antioxidant, anti-tumoral and antidiabetic effects.
View Article and Find Full Text PDFPrep Biochem Biotechnol
December 2024
Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati, Assam, India.
This study explored the impact of sodium acetate (Na-acetate) impact on lipid, carotenoid, and β-carotene production by the newly isolated strain . Batch and fed-batch bioreactor cultures were employed to optimize growth conditions and product yields. fed with Na-acetate in the yeast medium was evaluated in the batch bioreactor culture.
View Article and Find Full Text PDFHeliyon
December 2024
Research Laboratory of Environmental Sciences and Sustainable Development, LR18ES32, University of Sfax, Tunisia.
The annotated and predicted genomes of five archaeal strains (AS1, AS2, AS8, AS11 and AS19), isolated from Sfax solar saltern sediments (Tunisia) and affiliated with , were performed by RAST webserver (Rapid Annotation using Subsystem Technology) and NCBI prokaryotic genome annotation pipeline (PGAP). The results showed the ability of strains to use a reduced semi-phosphorylative Entner-Doudoroff pathway for glucose degradation and an Embden-Meyerhof one for gluconeogenesis. They could use glucose, fructose, glycerol, and acetate as sole source of carbon and energy.
View Article and Find Full Text PDFEnter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!