Results 51 to 60 of about 20,438 (217)

Hypothalamic Astrocytes Exhibit Glycolytic Features Making Them Prone for Glucose Sensing

Glia, Volume 73, Issue 11, Page 2253-2272, November 2025.
Main Points Hypothalamic astrocytes versus cortical astrocytes: are more glycolytic due to high Pkm2, Glut1 and Mct4 expression do not exhibit glutamate‐induced glycolysis detect glucose concentration variations via an AMPK sensor with altered lactate production.
Sarah Geller, Nadège Zanou, Sylviane Lagarrigue, Tamara Zehnder, Cathy Gouelle, Tania Santoro, Cendrine Repond, Paola Bezzi, Francesca Amati, Anne‐Karine Bouzier‐Sore, Ariane Sharif, Luc Pellerin   +11 more
wiley   +1 more source

The Clustering of Simulated Quasars [PDF]

AIP Conference Proceedings, 2009
We analyze the clustering properties of quasars simulated using a semianalytic model built on the Millennium Simulation, with the goal of testing scenarios in which black hole accretion and quasar activity are triggered by galaxy mergers. When we select quasars with luminosities in the range accessible by current observations, we find that predicted ...
Silvia Bonoli, Sebastian Heinz, Eric Wilcots   +2 more
openaire   +4 more sources

Simultaneous liver T1, T2, and ADC MR fingerprinting using optimized motion‐compensated diffusion preparations: An initial validation on volunteers

Magnetic Resonance in Medicine, Volume 94, Issue 5, Page 2173-2189, November 2025.
Abstract Purpose To develop a novel MR fingerprinting sequence using optimized motion‐compensated diffusion preparations for simultaneous T1, T2, and ADC quantification of liver tissue in a single breath‐held scan. Methods A radial spoiled gradient echo acquisition with magnetization preparation modules for T1, T2, and ADC encoding is proposed.
C. Velasco, C. Castillo‐Passi, N. Chaher, D. C. Karampinos, P. Irarrazaval, A. Phinikaridou, R. M. Botnar, C. Prieto   +7 more
wiley   +1 more source

Impact of Radio-mode Feedback on the Covering Fraction of the Circumgalactic Medium of Quasars

The Astrophysical Journal
Utilizing data from the Low-Frequency Array Two-meter Sky Survey and the Sloan Digital Sky Survey, we assemble a sample of 1469 projected quasar pairs with detected radio emissions from foreground quasars, as well as a control sample of 5846 pairs ...
Wen-Qiang Liang, Zhi-fu Chen, Rui-Jing Lu, Jing Li, Zhe-Geng Chen   +4 more
doaj   +1 more source

Exploiting the IRT-THESEUS Capability to Observe Lensed Quasars

Galaxies, 2021
THESEUS is an ESA space based project, which aims to explore the early universe by unveiling a complete census of Gamma-ray Burst (GRB) population in the first billion years.
Lindita Hamolli, Mimoza Hafizi, Francesco De Paolis, Achille A. Nucita   +3 more
doaj   +1 more source

Some Constraints on Quasar Progenitors and Quasar Evolution [PDF]

Symposium - International Astronomical Union, 1986
There is strong evidence that quasars are powered by the gravitational energy released by in fall of matter into a compact supermassive object which is most likely a black hole with mass M>106 to 109MO. The question then arises as to how such massive black holes came to be formed. What sort of objects were the progenitors?
openaire   +2 more sources

Is there a disc in the superluminal quasars? [PDF]

Monthly Notices of the Royal Astronomical Society, 2003
We present a new evidence of the accretion disc in active galactic nuclei, by examining the properties of the Ha emission line versus viewing angle, in a sample of superluminal (SL) quasars. Both line velocity width (FWHM) and rest equivalent width (EW) correlate with viewing angle.
E. Rokaki, E. Rokaki, E. Rokaki, F. Economou, Andy Lawrence, Andy Lawrence, Apostolos Mastichiadis   +6 more
openaire   +3 more sources

Highly multiplexed digital PCR assay for simultaneous quantification of variant allele frequencies and copy number alterations of KRAS and GNAS in pancreatic cancer precursors

Molecular Oncology, Volume 19, Issue 10, Page 2921-2935, October 2025.
Combining melting curve analysis enhances the multiplexing capability of digital PCR. Here, we developed a 14‐plex assay to simultaneously measure single nucleotide mutations and amplifications of KRAS and GNAS, which are common driver genes in pancreatic cancer precursors. This assay accurately quantified variant allele frequencies in clinical samples
Junko Tanaka, Tatsuo Nakagawa, Yusuke Ono, Yoshio Kamura, Takeshi Ishida, Hidemasa Kawabata, Kenji Takahashi, Hiroki Sato, Andrew S. Liss, Yusuke Mizukami, Takahide Yokoi   +10 more
wiley   +1 more source

The Cosmic Ultraviolet Baryon Survey (CUBS). VIII. Group Environment of the Most Luminous Quasars at z ≈ 1

The Astrophysical Journal
We investigate the group-scale environment of 15 luminous quasars (luminosity L _3000 > 10 ^46 erg s ^−1 ) from the Cosmic Ultraviolet Baryon Survey (CUBS) at redshift z ≈ 1.
Jennifer I-Hsiu Li, Sean D. Johnson, Erin Boettcher, Sebastiano Cantalupo, Hsiao-Wen Chen, Mandy C. Chen, David R. DePalma, Zhuoqi (Will) Liu, Nishant Mishra, Patrick Petitjean, Zhijie Qu, Gwen C. Rudie, Joop Schaye, Fakhri S. Zahedy   +13 more
doaj   +1 more source

Highly Accreting Quasars at High Redshift

Frontiers in Astronomy and Space Sciences, 2018
We present preliminary results of a spectroscopic analysis for a sample of type 1 highly accreting quasars (L/LEdd ~ 1.0) at high redshift, z ~2–3.
Mary L. Martínez-Aldama, Ascensión Del Olmo, Paola Marziani, Jack W. Sulentic, C. Alenka Negrete, Deborah Dultzin, Jaime Perea, Mauro D'Onofrio   +7 more
doaj   +1 more source