Biomass Project Research Center, Hiroshima University, and HOSTY Association are co-organizing the Hiroshima University Biomass Evening Seminar. This seminar covers topics from the fundamentals of biomass to the latest information so that it can contribute the activities on biomass in this district. The 37th seminar will be held as follows. Please join.

• Date & Time:Wed.9 Dec., 2015 16:20-17:50

• Place: Engineering 110 Lecture Room, Higashi-Hiroshima Campus, Hiroshima University

＜Program＞

• Commentary: Yukihiko MATSUMURA
  
  Professor, Institute of Engineering, Hiroshima University

• Lecture: Tsunehiro AKI
  
  Professor, Graduate School of Advanced Sciences of Matter, Hiroshima University

“Biomass and valuable lipid production”

To establish the industrial system for valuable lipid production using marine and terrestrial biomass, we have developed the fermentation and breeding technology mainly on an marine eukaryotic protist, thraustochytrid. Current progress will be introduced in this seminar.

• Lecture: Koichiro YOSHIDA
  
  M1 Student, Graduate School of Advanced Sciences of Matter, Hiroshima University

“The Production of Ethanol with Metabolism Mutant of Thermophillic Bacteria Moorella thermoacetica ATCC39073”

Thermophilic acetogen Moorella thermoacetica is a promising candidate for ethanol production from syngas (H2, CO2, CO). Previously, It was found that Moth_0864 and Moth_1181 genes were closely in M. thermoacetica ATCC39073. In this study, therefore, we constructed the mutant strain Mt-aldhΔpta by introducing the aldehyde dehydrogenase gene (Mt-aldh) from M. thermoacetica and disrupting both Moth_1181 and Moth_0864 genes. The mutant hardly produced acetate and the ethanol yield from fructose was 1.1 mol/mol whereas ATCC39073 did not produced ethanol. This result demonstrates that the disruption of acetate production pathway is effective to increase the amount of ethanol production.

• Lecture: Mohamad Rozyanti BINTI
  
  D2 Student, Graduate School of Engineering, Hiroshima University

“Decomposition kinetics of mannose, mannitol and mannuronic acid under hydrothermal condition”

Kinetics for decomposition of mannose, its corresponding uronic acid (mannuronic acid (MA)), and sugar alcohol (mannitol) under hydrothermal condition were determined. The experimental work was conducted using a continuous-flow-reactor at temperatures ranging from 170℃to 250℃, and with residence time between 3 and 15 s. The operating pressure was fixed at 25 MPa throughout the experiment. The yields of all compounds decreased as the temperature increased. The decomposition reaction followed first order kinetics at shorter residence times. The decomposition rate increased in the order of mannitol ＜ mannose ＜MA with activation energies of 27.0, 44.6 and 29.1 kJ/mol, respectively. However, the pre-exponential factors were 9,601.1, 281.9, and 6.19S-1 for mannose, MA, and mannitol, respectively, indicating that uronic acid is twice as easily decomposed, while sugar alcohol is less reactive than mannose by two orders of magnitude.

• Chair: Thachanan SAMANMULYA
  
  Special Postdoctral Researcher, Hiroshima University

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