Results 31 to 40 of about 632 (187)

Careful CO Addition Enhances Autotrophic d‐Lactate Formation With Engineered Acetobacterium woodii

Engineering in Life Sciences, Volume 26, Issue 2, February 2026.
ABSTRACT The acetogen A. woodii efficiently converts CO2 and H2 to acetate. Metabolic engineering enabled the autotrophic production of non‐native products, for example, d‐lactate from CO2 by overexpression of d‐lactate dehydrogenase from Leuconostoc mesenteroides and knockout of the native lactate dehydrogenase. During gas fermentation with acetogens,
Anna Stock, Inka Sotzeck, Kira Baur, Frank Bengelsdorf, Dirk Weuster‐Botz   +4 more
wiley   +1 more source

Internal flow characteristics in the draft tube of a Francis turbine under different working conditions

Advances in Mechanical Engineering
The Francis turbine stability is impacted significantly by the flow characteristics in its draft tube. In the case of a Francis turbine in a hydropower plant, numerical simulations were undertaken at the maximum and rated heads, respectively, under three
Yuanhang Hou, Xiaobing Liu, Ming Xiao, Haibin Zhang, Yinhui Cai, Yongzhong Zeng, Lei Zou, Jiayang Pang   +7 more
doaj   +1 more source

Flow Modeling in the Wake of a Francis Turbine with Hydraulic Charge: Case of Songloulou-Cameroon [PDF]

Journal of Applied Fluid Mechanics
Cavitation in hydraulic installations is still a major concern when it comes to producing electricity. We are aware of the danger of cavitation and the damage it can cause.
R. D. Wafo, M. Tientcheu-Nsiewe, D. Tcheukam-Toko, B. Kenmeugne, A. Kuitche   +4 more
doaj   +1 more source

Numerical research of cavitation on Francis turbine runners

International Journal of Hydrogen Energy, 2017
Francis turbines, as other hydraulic turbines, are custom-designed for nominal operating conditions specific to each power plant. However, they may need to be operated at off design flow conditions because of variable reservoir levels and flowrates. Operating the turbine at off-design points can cause cavitation.
Kutay Celebioglu, Burak Altintas, Selin Aradag, Yigit Tascioglu   +3 more
openaire   +3 more sources

Comparative Numerical Studies for the Flow Energy Dissipation Features in a Vertical Two‐Stage Centrifugal Pump in Pump and Turbine Conditions

Energy Science &Engineering, Volume 14, Issue 2, Page 764-779, February 2026.
Based on entropy theory, this study presents a comparative numerical analysis of the flow energy dissipation (FED) in a VTSP under two distinct operating conditions: pump condition and turbine condition, both characterized by relatively high hydraulic efficiencies of 88.9% and 87.4%, respectively. In pump condition, the highest FED production occurs in
S. Liu, T. P. Chen, Y. Li, M. Q. Liang, Y. J. Zhang, X. Z. Wei   +5 more
wiley   +1 more source

Numerical analysis of solid–liquidtwo-phase turbulent flow in Francis turbine runner with splitter bladesin sandy water

Advances in Mechanical Engineering, 2015
As the key component of a hydroelectric power generation system, hydraulic turbine plays a decisive role in the overall performance of the system. There are many sandy rivers in the world, and turbines working in these rivers are seriously damaged ...
Hua Hong, Zeng Yong-Zhong, Wang Hui-Yan, Ou Shun-Bing, Zhang Zhi-Zhong, Liu Xiao-Bing   +5 more
doaj   +1 more source

Influence of 3D Guide Vanes on the Channel Vortices in the Runner of a Francis Turbine

Journal of Fluid Science and Technology, 2006
It is known that the pressure fluctuation in the runner will become large when a Francis turbine operates at the low flow rate and high head. One of the reasons is the occurrence of channel vortices, which are caused by the three-dimensional flow ...
Shuhong LIU, Liang ZHANG, Yulin WU, Xianwu LUO, Michihiro NISHI   +4 more
doaj   +1 more source

Understanding the Role of pH Regulation and Neutralizing Agents in Organic Acid Production and Growth of Aspergillus oryzae

Biotechnology and Bioengineering, Volume 123, Issue 1, Page 116-133, January 2026.
We show that pH and neutralization strategy strongly influence the growth, pellet morphology, and organic acid production of Aspergillus oryzae. Acidic and alkaline conditions lead to hairy, dispersed pellets, while near‐neutral environments favour compact pellet formation.
Lukas Hartmann, Mark Christopher Martin, Anke Neumann, Dirk Holtmann, Katrin Ochsenreither   +4 more
wiley   +1 more source

Toward the Development of a Uranium‐Based Redox‐Flow Battery

ChemSusChem, Volume 19, Issue 1, January 2026.
The first all‐uranium‐based electrochemical cell has been realized using simple [UIV/V(tBuacac)4]0/+ and [UIII/IV(N(SiMe3)2)4]–/0 complexes, readily available in convenient, scalable syntheses, as anolyte and catholyte couples. Operating at a cell potential of 2.2 V with a projected energy density of 0.357 Wh kg–1, this system establishes a foundation ...
Pablo Waldschmidt, Nadir Jori, Judith Riedhammer, Frank W. Heinemann, Karsten Meyer   +4 more
wiley   +1 more source

At the intersection of soundscapes and roads: Quantifying anthrophony's influence on wildlife crossing structure use

Ecological Applications, Volume 36, Issue 1, January 2026.
Abstract Anthropogenic noise (anthrophony) can have significant negative effects on wildlife, causing both physiological (i.e., increased stress hormone production) and behavioral (i.e., altered anti‐predator behaviors, space use, or diel activity) changes in individuals.
Thomas J. Yamashita, Ashley M. Tanner, Evan P. Tanner, Daniel G. Scognamillo, Michael E. Tewes, John H. Young Jr., Jason V. Lombardi   +6 more
wiley   +1 more source