Results 81 to 90 of about 145,315 (349)

Wavelength conversion for WDM communication systems using four-wavemixing in semiconductor optical amplifiers [PDF]

, 1997
Four-wave mixing (FWM) in semiconductor optical amplifiers is an attractive mechanism for wavelength conversion in wavelength-division multiplexed (WDM) systems since it provides modulation format and bit rate transparency over wide tuning ranges.
Geraghty, David F., Lee, Robert B., Mathur, Atul, Vahala, Kerry J., Verdiell, Marc, Ziari, Mehrdad   +5 more
core   +1 more source

Gut microbiome and aging—A dynamic interplay of microbes, metabolites, and the immune system

FEBS Letters, EarlyView.
Age‐dependent shifts in microbial communities engender shifts in microbial metabolite profiles. These in turn drive shifts in barrier surface permeability of the gut and brain and induce immune activation. When paired with preexisting age‐related chronic inflammation this increases the risk of neuroinflammation and neurodegenerative diseases.
Aaron Mehl, Eran Blacher
wiley   +1 more source

Analysis of an On-Line Stability Monitoring Approach for DC Microgrid Power Converters [PDF]

, 2019
An online approach to evaluate and monitor the stability margins of dc microgrid power converters is presented in this paper. The discussed online stability monitoring technique is based on the Middlebrook's loop-gain measurement technique, adapted to ...
Caldognetto, Tommaso, Khodamoradi, Aram, Liu, Guangyuan, Magnone, Paolo, Mattavelli, Paolo   +4 more
core   +1 more source

A methionine‐lined active site governs carbocation stabilization and product specificity in a bacterial terpene synthase

FEBS Letters, EarlyView.
This study reveals a unique active site enriched in methionine residues and demonstrates that these residues play a critical role by stabilizing carbocation intermediates through novel sulfur–cation interactions. Structure‐guided mutagenesis further revealed variants with significantly altered product profiles, enhancing pseudopterosin formation. These
Marion Ringel, Carl P. O. Helmer, Shani Zev, Ronja Driller, Emily Buhr, Markus Reinbold, Renana Schwartz, Gabriel Foley, Mikael Boden, Daniel Garbe, Gerhard Schenk, Dan Thomas Major, Bernhard Loll, Thomas Brück   +13 more
wiley   +1 more source

Non-isolated high gain DC-DC converter for PV-fed DC microgrid

International Journal of Sustainable Engineering
This paper presents a high-gain DC-DC converter for photovoltaic (PV) applications. The proposed high gain DC-DC converter employs two coupled inductors, a voltage-lift capacitor, and two diode-capacitor multiplier cells to achieve a voltage gain of 21 ...
A. S. Valarmathy, M. Prabhakar, Kazem Varesi   +2 more
doaj   +1 more source

An adaptive disturbance rejection control scheme for voltage regulation in DC micro-grids [PDF]

, 2019
© 2019 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new ...
Costa Castelló, Ramon, Ramos Fuentes, German A., Raveendran Nair, Unnikrishnan   +2 more
core   +1 more source

Valosin‐containing protein counteracts ATP‐driven dissolution of FUS condensates through its ATPase activity in vitro

FEBS Letters, EarlyView.
Biomolecular condensates formed by fused in sarcoma (FUS) are dissolved by high ATP concentrations yet persist in cells. Using a reconstituted system, we demonstrate that valosin‐containing protein (VCP), an AAA+ ATPase, counteracts ATP‐driven dissolution of FUS condensates through its D2 ATPase activity.
Hitomi Kimura, Shin‐ichi Tate, Kyota Yasuda   +2 more
wiley   +1 more source

Synthesis and analysis of a cross-connected Fibonacci dc/dc converter with high voltage gain

Energy Reports, 2020
For thermal energy harvester based on a step-up dc/dc converter, we present a cross-connected Fibonacci dc/dc converter and its analysis method in this paper.
Kei Eguchi, Ratanaubol Rubpongse, Akira Shibata, Takaaki Ishibashi   +3 more
doaj   +1 more source

An Integrated Circuit for Signal Processing of the AMS RICH Photmultipliers Tubes [PDF]

, 1998
An analog integrated circuit has been designed, in a BiCMOS 0.8 micron technology, for the feasability study of the signal processing of the AMS RICH photomultiplier tubes.
C. Ankenbrandt, D. Cline, D. Neuffer, D. Trbojevic, D. Trbojevic, J. MacLachlan, J. Norem, J. Norem, J. Wei, K-Y. Ng, L. A. Ahrens, M. Brennan, M. Brennan, M. Popovic, R. Cappi, S. Y. Lee, T. Roser, V. Mane, W. K. Van Asselt, W. K. van Asselt, W. van Asselt, Z. Qian   +21 more
core   +3 more sources

Hyperosmotic stress induces PARP1‐mediated HPF1‐dependent mono(ADP‐ribosyl)ation

FEBS Letters, EarlyView.
Sorbitol‐induced hyperosmotic stress rapidly induces reversible mono(ADP‐ribosyl)ation (MARylation) on PARP1 without the signs of genotoxic signaling. We show that PARP1 autoMARylation is HPF1 dependent and forms hydroxylamine‐resistant O‐glycosidic linkages.
Anna Georgina Kopasz, Mihály Mérey, Rebeka Vásárhelyi, Ramóna Pék, Victor Imburchia, László Henn, Adrián Kószó, Nicholas D. Lakin, Ivan Ahel, Sébastien Huet, Ágnes Czibula, Gyula Timinszky   +11 more
wiley   +1 more source