Results 71 to 80 of about 6,081 (269)
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 +3 more
wiley +1 more source
Business Strategy and the Environment, EarlyView.ABSTRACT The role of business towards achieving the 17 Sustainable Development Goals (SDGs) has been well established. However, SDG contextualization continues to pose a conundrum, particularly for firms operating in multiple contexts. This becomes even more problematic in the case of SDG 11, the only goal in the sustainable development agenda directly
Andreas Georgiou
wiley +1 more source
CFD Modelling of Pump as Turbine with Various Number of Blade for Microhydro System
Journal of Applied Science & Process Engineering, 2016 Pump as Turbine is an electromechanically component that is largely used in microhydro system. The main advantages of pump as turbine compared to commercially available turbines are lower cost, easier to maintain and readily available. These key features
Mohd Azlan Ismail Ismail +3 more
doaj +1 more source
Critical Hydraulic Eccentricity Estimation in Vertical Turbine Pump Impeller to Control Vibration
International Journal of Rotating Machinery, 2021 In many applications, pumps are tested against standard specifications to define the maximum allowable vibration amplitude limits of a pump. It is essential to identify the causes of vibration and methods to attenuate the same to ensure the safe and ...
Ravindra S. Birajdar +2 more
doaj +1 more source
Experimental rotordynamics and flow visualization approach for periodically reversed flows of a Francis - Type Pump - Turbine in generating mode at off - design operating conditions [PDF]
, 2014 A non-conventional tufting visualization method along with an image processing development and specific applied technique adapted to the flow conditions is proposed and implemented on a reduced scale model of a Francis-type reversible pump-turbine in ...
Guzmán Díaz, Sebastián
core
Catheterization and Cardiovascular Interventions, EarlyView.ABSTRACT We describe the “skipping rope technique” for managing burr entrapment during rotational atherectomy. Sequential counterclockwise rotational force is applied to the drive shaft, generating alternative torque dynamics. This maneuver provides a safe method to disengage a stuck rotaburr, offering operators an additional strategy for this ...
Thomas J. Ford +3 more
wiley +1 more source
Advances in Mechanical Engineering, 2016 This article presents a multi-objective optimization to improve the hydrodynamic performance of a counter-rotating type pump-turbine operated in pump and turbine modes.
Jin-Woo Kim +6 more
doaj +1 more source
Low power steam turbine energy efficiency and losses during the developed power variation
Tehnički Glasnik, 2018 This paper investigates low power marine steam turbine during the variation in its developed power. The turbine is used for the Main Feedwater Pump (MFP) drive.
Vedran Mrzljak
doaj +1 more source
Simulation model of a variable-speed pumped-storage power plant in unstable operating conditions in pumping mode [PDF]
, 2017 This paper presents a dynamic simulation model of a laboratory-scale pumped-storage power plant (PSPP) operating in pumping mode with variable speed. The model considers the dynamic behavior of the conduits by means of an elastic water column approach ...
Ardizzon, Guido +5 more
core +2 more sources
Advances in Triboelectric Nanogenerators With Rotating Structure
Carbon Energy, EarlyView.The rotating TENG has been widely studied for its superiorities of simple structure, high efficiency, and stable output. This review introduced the four different principles of rotating TENG and offered a thorough summary for performance and application research through three‐level classification. Importantly, the current existing problems, challenges,
Chuguo Zhang +4 more
wiley +1 more source