Results 81 to 90 of about 3,071,324 (279)

The Rewards of Patience: An 822 Day Time Delay in the Gravitational Lens SDSS J1004+4112

, 2007
We present 107 new epochs of optical monitoring data for the four brightest images of the gravitational lens SDSS J1004+4112 observed between October 2006 and June 2007. Combining this data with the previously obtained light curves, we determine the time
C. S. Kochanek, C. W. Morgan, E. E. Falco, Inada N., J. Fohlmeister, J. Wambsganss, Kawano Y., Pelt J., Pelt J., Shakura N. I.   +9 more
core   +1 more source

Sublinear-Time Distributed Algorithms for Detecting Small Cliques and Even Cycles [PDF]

, 2019
In this paper we give sublinear-time distributed algorithms in the CONGEST model for subgraph detection for two classes of graphs: cliques and even-length cycles.
Eden, Talya, Fiat, Nimrod, Fischer, Orr, Kuhn, Fabian, Oshman, Rotem   +4 more
core   +1 more source

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

Investigation of fast and efficient lossless compression algorithms for macromolecular crystallography experiments

Journal of Synchrotron Radiation
Structural biology experiments benefit significantly from state-of-the-art synchrotron data collection. One can acquire macromolecular crystallography (MX) diffraction data on large-area photon-counting pixel-array detectors at framing rates exceeding ...
Herbert J. Bernstein, Jean Jakoncic
doaj   +1 more source

Conceptual Ultraviolet‐C Light Source Based on Up‐Conversion Luminescence

Advanced Photonics Research, 2022
Ultraviolet‐C illumination may provide a promising solution for the disinfection technology, and thus the development of novel type of ultraviolet‐C light sources is continuously expected.
Xiyu Zhao, Feng Liu, Tingxing Shi, Huajun Wu, Liangliang Zhang, Jiahua Zhang, Xiao-jun Wang, Yichun Liu   +7 more
doaj   +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

High‐Order Time‐Dependent Perturbation Theory for Classical Mechanics and for Other Systems of First‐Order Ordinary Differential Equations [PDF]

, 1970
A time‐dependent perturbation solution is derived for a system of first‐order nonlinear or linear ordinary differential equations. By means of an ansatz, justified a posteriori, the latter equations can be converted to an operator equation which is ...
Marcus, R. A.
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

Crosstalk between the ribosome quality control‐associated E3 ubiquitin ligases LTN1 and RNF10

FEBS Letters, EarlyView.
Loss of the E3 ligase LTN1, the ubiquitin‐like modifier UFM1, or the deubiquitinating enzyme UFSP2 disrupts endoplasmic reticulum–ribosome quality control (ER‐RQC), a pathway that removes stalled ribosomes and faulty proteins. This disruption may trigger a compensatory response to ER‐RQC defects, including increased expression of the E3 ligase RNF10 ...
Yuxi Huang, Satoshi Hashimoto, Sota Ito, Chisato Kikuguchi, Miho Hoshi, Kiyoshi Yamaguchi, Yoichi Furukawa, Toru Suzuki, Toshifumi Inada   +8 more
wiley   +1 more source

Spin blockade, orbital occupation and charge ordering in La_(1.5)Sr_(0.5)CoO4

, 2009
Using Co-L_(2,3) and O-K x-ray absorption spectroscopy, we reveal that the charge ordering in La_(1.5)Sr_(0.5)CoO4 involves high spin (S=3/2) Co^2+ and low spin (S=0) Co^3+ ions. This provides evidence for the spin blockade phenomenon as a source for the
A. Tanaka, C. F. Chang, C. T. Chen, H. H. Hsieh, H.-J. Lin, Hua Wu, J. B. Goodenough, L. H. Tjeng, M. Benomar, N. Hollmann, S. Sugano, T. Burnus, T. Lorenz, W. A. Harrison, Z. Hu   +14 more
core   +1 more source