Results 81 to 90 of about 797,708 (244)
, 2015 Analysis of real operating condition revealed that HVDC transformers experience combined effect of DC biased AC electric field. The dynamics of pressboard particle in contaminated transformer oil under the influence of DC, AC and DC biased AC electric ...
Mahmud, S. +4 more
core +1 more source
Structural and biochemical analysis of a B12 superbinder
FEBS Letters, EarlyView.BtuG proteins are vitamin B12 scavengers in Bacteroides thetaiotaomicron, a dominant human gut bacterium. We present crystal structures of three BtuG homologs bound to cobalamin and its precursor cobinamide, revealing picomolar binding affinities, among the highest known for any natural protein.
Jose M. Martinez Felices +3 more
wiley +1 more source
Modeling of traction power supply systems for movement of high-speed trains
MATEC Web of Conferences, 2018 Upgrading of traction power supply systems will be required to transfer electrified railway lines to high-speed traffic. Coaxial cables and balancing transformers can be used as technical upgrading means.
Cherepanov Aleksandr +2 more
doaj +1 more source
Impact of DC Transient Disturbances on Harmonic Performance of Voltage Transformers for AC Railway Applications. [PDF]
Sensors (Basel), 2022 Letizia PS, Signorino D, Crotti G.
europepmc +1 more source
Calibration of voltage transformers and high-voltage capacitors at NIST
, 1989 The National Institute of Standards and Technology (NIST) calibration service for voltage transformers and high-voltage capacitors is described. The service for voltage transformers provides measurements of ratio correction factors and phase angles at ...
Anderson, W.E.
core +1 more source
FEBS Letters, EarlyView.Mycobacterial 3‐methylcrotonyl‐CoA carboxylase uses a mobile biotin‐carrying domain to shuttle a carboxyl group between two catalytic sites, enabling carboxylation of 3‐methylcrotonyl‐CoA during leucine breakdown. Cryo‐electron microscopy captures the carrier at both sites and reveals an inward loop movement that may prevent futile rebinding to the ...
Ajit Yadav +2 more
wiley +1 more source
Operation Modes of HV/MV Substations
Electrical, Control and Communication Engineering, 2009 A distribution network consists of high voltage grid, medium voltage grid, and low voltage grid. Medium voltage grid is connected to high voltage grid via substations with HV/MV transformers.
Josifs Survilo, Antons Kutjuns
doaj +1 more source
Simplified and Low-Cost Characterization of Medium-Voltage Low-Power Voltage Transformers in the Power Quality Frequency Range. [PDF]
Sensors (Basel), 2022 Mingotti A +3 more
europepmc +1 more source
The Shewanella oneidensis Fic enzyme SoFic targets the switch‐I region of EF‐Tu for AMPylation
FEBS Letters, EarlyView.Fic enzymes mediate diverse post‐translational modifications across all domains of life, including AMPylation. Prokaryotic EF‐Tu can be AMPylated and deAMPylated by the conserved Fic enzyme SoFic. Structural and biochemical approaches were used to characterize the effect of AMPylation on EF‐Tu, SoFic's enzymatic activities, and the enzyme‐target ...
Svenja Runge +6 more
wiley +1 more source
Dynamic Voltage Restorer With Complete Control Of The Connection Transformers Saturation
Eletrônica de Potência, 2013 This paper proposes a technique to suppress saturation in series transformers applied to dynamic voltage restorer (DVR) systems. The method consists in correcting the voltages which are injected through the transformers into the power system to ...
Darlan A. Fernandes +4 more
doaj +1 more source