Results 51 to 60 of about 17,328,388 (374)

Hematopoietic (stem) cells—The elixir of life?

FEBS Letters, EarlyView.
The aging of HSCs (hematopoietic stem cells) and the blood system leads to the decline of other organs. Rejuvenating aged HSCs improves the function of the blood system, slowing the aging of the heart, kidney, brain, and liver, and the occurrence of age‐related diseases.
Emilie L. Cerezo, Jonah Anderson, Emilie Dinh Vedrenne, Noël Yeh Martín, Jette Lengefeld   +4 more
wiley   +1 more source

Constant current load matches impedances of electronic components [PDF]

, 1970
Constant current load with negative resistance characteristics actively compensates for impedance variations in circuit components. Through a current-voltage balancing operation the internal impedance of the diodes is maintained at a constant value. This
Alexander, R. M.
core   +1 more source

The role and implications of mammalian cellular circadian entrainment

FEBS Letters, EarlyView.
At their most fundamental level, mammalian circadian rhythms occur inside every individual cell. To tell the correct time, cells must align (or ‘entrain’) their circadian rhythm to the external environment. In this review, we highlight how cells entrain to the major circadian cues of light, feeding and temperature, and the implications this has for our
Priya Crosby
wiley   +1 more source

A Novel Diagnosis and Location Method of Short-Circuit Grounding High-Impedance Fault for a Mesh Topology Constant Current Remote Power Supply System in Cabled Underwater Information Networks

IEEE Access, 2019
Cabled underwater information networks (CUINs) have evolved over the last decade to provide abundant power and broad bandwidth communication to enable marine science.
Zheng Zhang, Xuejun Zhou, Xichen Wang, Lei Wang   +3 more
doaj   +1 more source

The Fate of the Accelerating Universe

, 2005
The presently accelerating universe may keep accelerating forever, eventually run into the event horizon problem, and thus be in conflict with the superstring idea.
A. R. Liddle, J. D. Barrow, Je-An Gu, N. Arkani-Hamed, W-Y. P. Hwang   +4 more
core   +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

Research on Constant-Voltage/Constant-Current Characteristics of Variable-Structure Dual-Frequency Dual-Load Wireless Power Transfer Technology

World Electric Vehicle Journal
To address the limitations of conventional magnetically coupled resonant wireless power transfer (MCR-WPT) systems in multi-frequency multi-load applications—specifically inadequate load power independence and high complexity inconstant-voltage/constant ...
Lu Zhang, Jundan Mao, Yonglin Ke, Yueliang Chen, Yao Dong, Qinzheng Zhang   +5 more
doaj   +1 more source

The $\pi \sigma$-Axial Exchange Current

, 1993
The axial exchange current operator that arises from the coupling of the axial field to the pion and effective scalar field in nuclei is constructed. The spatial dependence of this exchange current operator may be determined directly from the nucleon ...
Akhmedov, Arima, Bentz, Blunden, Brown, Carlson, D.O. Riska, Gaarde, Hjorth-Jensen, K. Tsushima, Kirchbach, Kirchbach, Kubodera, Labombe, Lee, Machleidt, Ohta, Osterfeld, Rho, Towner, Tsushima, Tsushima   +21 more
core   +1 more source

Interplay between circadian and other transcription factors—Implications for cycling transcriptome reprogramming

FEBS Letters, EarlyView.
This perspective highlights emerging insights into how the circadian transcription factor CLOCK:BMAL1 regulates chromatin architecture, cooperates with other transcription factors, and coordinates enhancer dynamics. We propose an updated framework for how circadian transcription factors operate within dynamic and multifactorial chromatin landscapes ...
Xinyu Y. Nie, Jerome S. Menet
wiley   +1 more source

Variable Multiple Interleaved Bi-Directional DC/DC Converter with Current Ripple Optimization

Applied Sciences, 2023
In order to reduce the current ripple and improve the power density of the system, the multiple structure design is generally adopted by the traditional bidirectional DC/DC converter.
Jiandong Duan, Shuai Wang, Yiming Xu, Shaogui Fan, Ke Zhao, Li Sun   +5 more
doaj   +1 more source