Results 131 to 140 of about 275,828 (252)

CFD and Experimental Comparison for Micro-Pump Performance in Space Applications: A Case Study

Applied Sciences
This paper presents a case study comparing CFD predictions with experimental measurements for micropumps, with the goal of evaluating the accuracy and limitations of CFD methods in complex microscale geometries.
Oana Dumitrescu, Cristian Dobromirescu, Valeriu Dragan, Ionut Sebastian Vintila, Radu Mihalache   +4 more
doaj   +1 more source

Influence of Zn2+ and Oxygen Supply on Malic Acid Production and Growth of Aspergillus oryzae

Biotechnology and Bioengineering, EarlyView.
ABSTRACT Malic acid is a valuable platform chemical traditionally derived from fossil‐based resources. Microbial cultivation with Aspergillus oryzae offers a sustainable alternative based on renewable feedstocks. In this study, a well‐established minimal medium for malic acid production, commonly used in previous research to ensure reproducibility, was
Lukas Hartmann, Anke Neumann, Dirk Holtmann, Katrin Ochsenreither   +3 more
wiley   +1 more source

Test Stand for Microjet Engine Prototypes

Machines
To investigate the functionality and performance of a prototype microjet engine, we constructed a versatile test stand tailored to the specifications of a 400 N prototype.
Cornel Mihai Tărăbîc, Grigore Cican, Cristian Olariu, Gabriel Dediu, Răzvan Marius Catană   +4 more
doaj   +1 more source

Advancing Malic Acid Production of Aspergillus oryzae: Combined Process Optimization and Application of Various Substrates

Biotechnology and Bioengineering, EarlyView.
ABSTRACT In light of climate change and growing resource scarcity, microbial production of organic acids offers a sustainable alternative to fossil‐based chemical synthesis. In this study, malic acid production by Aspergillus oryzae was optimized through cultivation temperature adjustment and biotin supplementation, while organic acid formation from ...
Lukas Hartmann, Anke Neumann, Dirk Holtmann, Björn Vater, Thomas Hahn, Susanne Zibek, Katrin Ochsenreither   +6 more
wiley   +1 more source

Introducing Silencers on Micro Turboshafts Powering Unmanned Aerial Vehicles

Acoustics
The transition to alternative electrical energy solutions for drone propulsion systems presents several challenges, particularly in managing noise. This noise, compounded by that from the propellers, can produce spectra that are either unpleasant to ...
Andrei-George Totu, Cristian Olariu, Marius Deaconu, Laurențiu Cristea, Luminița Drăgășanu, Constantin Sandu   +5 more
doaj   +1 more source

Raman Spectroscopy–Based Glucose Feed Control Automates Malic Acid Fermentation

Biotechnology and Bioengineering, EarlyView.
Raman spectroscopy enables automated, closed‐loop glucose feeding for malic acid production with Ustilago trichophora. Online PLS regression of glucose and malic acid provides input for PID control to maintain 20 g/L glucose. The feed is dynamically adjusted and stopped in response to metabolic demand and product inhibition, demonstrating practical ...
Luca Antonia Grebe, Katharina Hürter, Dominik Engel, Alexander Walter Wilhelm Echtermeyer, Mafalda S. Santos, Laurin Röder, Valentin Steier, Jörn Viell, Jørgen Barsett Magnus   +8 more
wiley   +1 more source

High-Speed Schlieren Analysis of Projectile Kinematics and Muzzle Jet Dynamics in a CO₂-Driven Airsoft Gun

Fluids
Understanding the transient flow phenomena accompanying projectile discharge is essential for improving the safety, efficiency, and predictability of small-scale ballistic systems.
Emilia-Georgiana Prisăcariu, Sergiu Strătilă, Raluca Andreea Roșu, Oana Dumitrescu, Valeriu Drăgan   +4 more
doaj   +1 more source

Corporate Decarbonization via Technology and Management

Business Strategy and the Environment, EarlyView.
ABSTRACT This study provides a comprehensive overview of key findings on decarbonization, advanced technologies, and management strategies, highlighting emerging themes shaping the field. Advanced technologies enhance carbon reduction through efficiency, real‐time monitoring, and optimizing resource optimization.
Heidy Montero‐Teran, Rudolf R. Sinkovics, Olli Kuivalainen   +2 more
wiley   +1 more source

The Use of Renewable Energy in Prominent City Buildings: A Diffusion Study on Top European Football Organizations

Business Strategy and the Environment, EarlyView.
ABSTRACT The present study applied the diffusion of innovation theory to investigate the rate of diffusion of renewable energy sources used by Europe's top professional football stadiums and the relationship with carbon neutrality. A discrete diffusion model estimated the diffusion of renewable energy to saturation, and a multivariate logistic ...
Chad S. Seifried, Liz Wanless, Timothy Kellison   +2 more
wiley   +1 more source

Recubrimientos protectores para componentes de turbinas de aviación y de generación de energía depositados por proyección por plasma

Boletín de la Sociedad Española de Cerámica y Vidrio, 2000
Coatings produced by aluminium diffusion, called aluminide are employed to increase the oxidation and corrosion resistance, increasing the life of Ni and Co base superalloys components at temperatures comprised between 900 and 1050ºC.
Agüero Bruna, A., Álvarez Alba, J., García de Blas Villanueva, F. J., Valles González, P.   +3 more
doaj