Results 31 to 40 of about 4,139,374 (252)
Structural insights and therapeutic targets in Acinetobacter baumannii capsule biosynthesis
FEBS Letters, EarlyView.Hypervirulent KL49 A. baumannii's capsular polysaccharide contains the nonulosonic acid 8‐epi‐Leg5,7Ac2, synthesized by epimerization via ElaA, ElaB, and ElaC. Crystal structures of ElaA, ElaB, and ElaC reveal their role in CMP‐Leg5,7Ac2 synthesis and regioselective C8 epimerization.
Woo Cheol Lee +7 more
wiley +1 more source
Power quality improvement using dynamic voltage restorer in electrical distribution system: an overview [PDF]
, 2020 This paper represents a review of the dynamic voltage restorer for power quality improvement in the electrical distribution system. Over the past 50 years, issues concerning power quality have steadily increased, to prevent the effect of the voltage ...
Ali Basim Mohammed +6 more
core +1 more source
IET Power ElectronicsGrid‐connected inverters with an inductor–capacitor–inductor (LCL) filter usually require the implementation of damping in the filter to suppress the resonance associated with the filter and hence ensure internal stability.
Ramy Ali +3 more
doaj +1 more source
Reconstructing enzyme evolution by protein engineering
FEBS Letters, EarlyView.Natural enzyme evolution can be retraced by protein engineering methods such as directed evolution, rational design, and ancestral sequence reconstruction. These approaches reveal how enzymes emerged from ligand‐binding scaffolds, developed varying substrate preferences, formed oligomeric complexes, adapted to environmental changes, and evolved novel ...
Lukas Drexler +2 more
wiley +1 more source
KOHONEN NEURAL NETWORK CLUSTERING FOR VOLTAGE CONTROL IN POWER SYSTEMS [PDF]
, 2010 Clustering a power system is very useful for the purpose of voltage stability control. However, the methods have developed usually have computational inefficiency.
Nizam , Muhammad
core
IET Power ElectronicsModulation strategy plays a key role in the operation of modular multilevel converters (MMC). Although many studies have been carried out on its optimization in MMC, the limitations of hardware implementation are seldom considered.
Zichen Wang +5 more
doaj +1 more source
UUDAT based on the modular multilevel converter and diode bridges for high-voltage DC application
The Journal of Engineering, 2019 Conventional unidirectional DC/DC converters for high-voltage direct current application employ DC/AC/DC technology and suffer from high converter cost and power loss.
Meng Zhou +5 more
doaj +1 more source
Epigenetic reprogramming of lineage switching in cancer
FEBS Letters, EarlyView.Cancer cells rarely commit to a single identity. Epigenetic mechanisms and tumor microenvironment cues push epithelial cells toward flexible, hybrid states that can shift into mesenchymal, neuroendocrine, or stem‐like fates, driving metastasis, drug resistance, and tumor heterogeneity. Targeting the epigenetic regulators behind these transitions, using
Ezgi Boyvatlı +4 more
wiley +1 more source
IET Generation, Transmission & DistributionThe weak AC grid in a modular multilevel converter modular multilevel converter based high voltage direct current (MMC‐HVDC) receiving‐end system requires faster reactive power support from the receiving‐end MMC.
Junhua Xu +5 more
doaj +1 more source
Analysis of power transmission limit for the VSC-HVDC feeding weak grid
The Journal of Engineering, 2019 The power transmission characteristics of the high-voltage DC (HVDC) feeding system are the key issues to evaluate the ability of the grid to eliminate DC power.
Aijun Wu +4 more
doaj +1 more source