Results 81 to 90 of about 11,977,292 (286)

Optimization Method for Combination of Residual Current Protection and Coincidence Brake Logic in a Low-Voltage Distribution System

open access: yesShanghai Jiaotong Daxue xuebao
Low-voltage distribution systems frequently experience leakage current accidents. However, it is challenging to distinguish fault characteristics in abnormal operating conditions, such as electric shock to biological organisms and three-phase imbalance ...
XU Han, ZHU Sanli, ZHANG Tengfei, CHEN Shu, LIU Mingxiang
doaj   +1 more source

Functional comparison of EncB and EncC cargo proteins in iron storage within the Myxococcus xanthus encapsulin

open access: yesFEBS Letters, EarlyView.
Encapsulins are protein nanocompartments that play an important role in iron storage. In the Myxococcus xanthus encapsulin system, two cargo proteins called EncB and EncC contribute to iron mineralization. Here, we show that EncB and EncC generate iron‐containing minerals with distinct chemical compositions, suggesting that the composition of stored ...
Harry B. McDowell   +2 more
wiley   +1 more source

A pilot protection scheme based on similarity comparison of voltage waveforms for active distribution networks

open access: yesInternational Journal of Electrical Power & Energy Systems
In active distribution networks with a high penetration of distributed generation, the electrical characteristics of phase-to-phase short-circuit faults are significantly affected by factors such as distributed generation capacity and control strategy ...
Wei Cong   +5 more
doaj   +1 more source

Structural and biochemical analysis of a B12 superbinder

open access: yesFEBS 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

LIMITATION ОF FERRO-RESONANCE АND CUMULATIVE OVER-VOLTAGES BY WEAK NONLINEAR RESISTORS IN SWITCH GEAR WITH VOLTAGE TRANSFORMERS

open access: yesИзвестия высших учебных заведений и энергетических объединенний СНГ: Энергетика, 2005
Investigations results pertaining to ferro-resonance and cumulative over-voltages in switch gears by means of computer modeling are given in the paper. In order to solve the problem concerning limitation of ferro-resonance and cumulative over-voltages it
E. V. Dmitriev   +3 more
doaj  

A High-precision Current Sense Circuit with Trimming for DC-DC Converts

open access: yesMATEC Web of Conferences, 2018
A high-precision current sense circuit with trimming is proposed to realize the over-current protection of the power management chip and improve its conversion efficiency.
Duan Ning   +4 more
doaj   +1 more source

The Shewanella oneidensis Fic enzyme SoFic targets the switch‐I region of EF‐Tu for AMPylation

open access: yesFEBS 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

Research of lightning protection gap of 35 kV power line of coal mine

open access: yesGong-kuang zidonghua, 2013
In order to test lightning protection effect of protection gap for 35 kV power line, the paper simulated lightning invasion in 35 kV transformer taking 35 kV overhead line of a mine as model by use of ATP-EMPT electromagnetic transient analysis software,
DENG Jie-wen   +5 more
doaj  

L‐aspartate oxidase provides new insights into fumarate reduction in anaerobic darkness in Synechocystis sp. PCC6803

open access: yesFEBS Letters, EarlyView.
Synechocystis strains deficient in succinate dehydrogenase (SDH) secrete more succinate than the WT under dark anaerobic conditions, supporting that SDH then primarily acts as SDH, not as a fumarate reductase. L‐aspartate oxidase (Laspo) from Synechocystis is functional under anaerobic conditions, reducing fumarate to succinate.
Kateryna Kukil   +3 more
wiley   +1 more source

Study of Emergency Power Based on Solar Battery Charging

open access: yesMATEC Web of Conferences, 2016
To study an emergency power based on solar battery charging. Based on the electric-generation principle of solar panel, solar energy is changed into electrical energy.
Wang Lei   +5 more
doaj   +1 more source

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