Results 61 to 70 of about 2,146,019 (274)

High-resolution double morphology of the most distant known radio quasar at z=6.12

, 2008
Context: The highest redshift quasars at z>~6 receive considerable attention since they provide strong constraints on the growth of the earliest supermassive black holes.
Becker, Blundell, Ciliegi, de Vries, Dunlop, Frey, Frey, Haiman, Jarvis, Jiang, K. É. Gabányi, L. I. Gurvits, McGreer, Murray, Ménard, O'Dea, S. Frey, Shaver, Shepherd, Springel, Steidel, Stern, Taylor, White, Wilkinson, Wyithe, Z. Paragi   +26 more
core   +1 more source

Structural insights into lacto‐N‐biose I recognition by a family 32 carbohydrate‐binding module from Bifidobacterium bifidum

FEBS Letters, EarlyView.
Bifidobacterium bifidum establishes symbiosis with infants by metabolizing lacto‐N‐biose I (LNB) from human milk oligosaccharides (HMOs). The extracellular multidomain enzyme LnbB drives this process, releasing LNB via its catalytic glycoside hydrolase family 20 (GH20) lacto‐N‐biosidase domain.
Xinzhe Zhang, Naoki Sunagawa, Toma Kashima, Kiyohiko Igarashi, Akimasa Miyanaga, Shinya Fushinobu   +5 more
wiley   +1 more source

Cascadable Enhanced Quasi‐Z‐Source Inverter with Reduced Current Stress

IET Power Electronics
In magnetically coupled impedance source (MCIS) inverters, the turn ratio of the coupled inductor offers design flexibility. The leakage inductance, however, poses additional challenges, mainly voltage spikes.
Ahmad Mahdave, Mohammad Monfared, Ali Nikbahar, Wahid Eskandary   +3 more
doaj   +1 more source

Molecular bases of circadian magnesium rhythms across eukaryotes

FEBS Letters, EarlyView.
Circadian rhythms in intracellular [Mg2+] exist across eukaryotic kingdoms. Central roles for Mg2+ in metabolism suggest that Mg2+ rhythms could regulate daily cellular energy and metabolism. In this Perspective paper, we propose that ancestral prokaryotic transport proteins could be responsible for mediating Mg2+ rhythms and posit a feedback model ...
Helen K. Feord, Gerben van Ooijen
wiley   +1 more source

Switched Z-Source/Quasi-Z-Source DC-DC Converters With Reduced Passive Components for Photovoltaic Systems

IEEE Access, 2019
In this paper, switched Z-source/quasi-Z-source dc-dc converters (SZSC/SQZSCs) are proposed for the photovoltaic (PV) grid-connected power system, where the high step-up dc-dc converters are required to boost the low voltage to high voltage.
Junfeng Liu, Jialei Wu, Jianyong Qiu, Jun Zeng   +3 more
doaj   +1 more source

Peptide‐based ligand antagonists block a Vibrio cholerae adhesin

FEBS Letters, EarlyView.
The structure of a peptide‐binding domain of the Vibrio cholerae adhesin FrhA was solved by X‐ray crystallography, revealing how the inhibitory peptide AGYTD binds tightly at its Ca2+‐coordinated pocket. Structure‐guided design incorporating D‐amino acids enhanced binding affinity, providing a foundation for developing anti‐adhesion therapeutics ...
Mingyu Wang, Grace Du, Charity Yongo‐Luwawa, Angelina Lu, Brett Kinrade, Kim Munro, Karl E. Klose, William D. Lubell, Peter Davies, Shuaiqi Guo   +9 more
wiley   +1 more source

A multi-source data fusion method for distribution network based on improved evidence theory

Diance yu yibiao
In response to the problem of unsatisfactory multi-source data fusion in distribution network is not ideal under the measurement uncertainty and no prior information request, this paper proposes a multi-source data fusion method based on improved ...
LOU Zheng, LIU Meizhao, JING Dongsheng, BAI Rui, LI Heting   +4 more
doaj   +1 more source

The Entner-Doudoroff and Nonoxidative Pentose Phosphate Pathways Bypass Glycolysis and the Oxidative Pentose Phosphate Pathway in Ralstonia solanacearum

mSystems, 2020
In Ralstonia solanacearum, a devastating phytopathogen whose metabolism is poorly understood, we observed that the Entner-Doudoroff (ED) pathway and nonoxidative pentose phosphate pathway (non-OxPPP) bypass glycolysis and OxPPP under glucose oxidation ...
Poonam Jyoti, Manu Shree, Chandrakant Joshi, Tulika Prakash, Suvendra Kumar Ray, Siddhartha Sankar Satapathy, Shyam Kumar Masakapalli   +6 more
doaj   +1 more source

High-resolution images of five radio quasars at early cosmological epochs

, 2010
Context: Until now, there have only been seven quasars at z>4.5 whose the high-resolution radio structure had been studied in detail with Very Long Baseline Interferometry (VLBI) imaging.
Best, Chen, Condon, D. Cseh, Falcke, Frey, Frey, Frey, Frey, Gurvits, Jackson, Jackson, K. É. Gabányi, Kellermann, Kellermann, Kovalev, L. I. Gurvits, Lima, Martí-Vidal, Momjian, Momjian, Momjian, Mosoni, O’Dea, O’Dea, Paragi, Peterson, Readhead, Romani, S. Frey, Sahni, Schneider, Shepherd, Urry, Veres, Vishwakarma, Vishwakarma, White, Wilkinson, Z. Paragi   +39 more
core   +1 more source

Real‐time assay of ribonucleotide reductase activity with a fluorescent RNA aptamer

FEBS Letters, EarlyView.
Ribonucleotide reductases (RNR) synthesize DNA building blocks de novo, making them crucial in DNA replication and drug targeting. FLARE introduces the first single‐tube real‐time coupled RNR assay, which enables isothermal tracking of RNR activity at nanomolar enzyme levels and allows the reconstruction of allosteric regulatory patterns and rapid ...
Jacopo De Capitani, Noemi E. Nwosu, Viktoria Gocke, Müge Kasanmascheff, Hannes Mutschler   +4 more
wiley   +1 more source