Ana F Tomás

Publications

• 1.09

  Impact points

  Effect of xylose and nutrients concentration on ethanol production by a newly isolated extreme thermophilic bacterium.

  Ana F Tomas, Dimitar Karakashev, Irini Angelidaki

  Water science and technology : a journal of the International Association on Water Pollution Research. 01/2011; 64(2):341-7.

  An extreme thermophilic ethanol-producing strain was isolated from an ethanol high-yielding mixed culture, originally isolated from a hydrogen producing reactor operated at 70 degrees C. Ethanol yields were assessed with increasing concentrations of xylose, up to 20 g/l. The ability of the strain to... [more] An extreme thermophilic ethanol-producing strain was isolated from an ethanol high-yielding mixed culture, originally isolated from a hydrogen producing reactor operated at 70 degrees C. Ethanol yields were assessed with increasing concentrations of xylose, up to 20 g/l. The ability of the strain to grow without nutrient addition (yeast extract, peptone and vitamins) was also assessed. The maximum ethanol yield achieved was 1.28 mol ethanol/mol xylose consumed (77% of the theoretical yield), at 2 g/l of initial xylose concentration. The isolate was able to grow and produce ethanol as the main fermentation product under most of the conditions tested, including in media lacking vitamins, peptone and yeast extract. The results indicate that this new organism is a promising candidate for the development of a second generation bio-ethanol production process.

• Effect of xylose and nutrients concentration on ethanol production by a newly isolated extreme thermophilic Thermoanaerobacter sp.

  Ana F Tomás, Dimitar Karakashev, Irini Angelidaki

  12th World Congress on Anaerobic Digestion, Guadalajara, Mexico; 01/2010

• Understanding the regulation of metabolic shift in the extreme thermophile Caldicellulosiruptor saccharolyticus using different carbon sources and hydrogen pressures

  Ana Tomás

  12/2007

  Degree: MsC in Biological Engineering

  Supervisor: Jorge Leitão, Ed van Niel