Results 71 to 80 of about 1,188,616 (233)

circPDE4B downregulation triggers GEMIN5‑dependent translational stress response and autophagy to reduce MAPT pathology

Alzheimer's &Dementia, Volume 22, Issue 5, May 2026.
Abstract INTRODUCTION Circular RNAs (circRNAs) are emerging as key regulators of gene expression, synaptic plasticity, and neuronal function in Alzheimer's disease (AD). Here, we characterize the biological actions of circPDE4B, a highly expressed circRNA markedly reduced in AD. METHODS circPDE4B knockdown in neuronal progenitor cells was combined with
Sambhavi Puri, Sophie J. F. van der Spek, Mintao Lin, Zihan Wang, Jacob Porter, Junming Hu, Liyuan Hu, Alejandro N. Rondón‐Ortiz, Alexander Knyshov, Jenna L. Libera, Scott E. Counts, Debomoy K. Lahiri, Julia T. C. W., Andrew Emili, Xiaoling Zhang, Benjamin Wolozin   +15 more
wiley   +1 more source

Thermal Segregation and Reddening in Europa's Double Ridges

Journal of Geophysical Research: Planets, Volume 131, Issue 5, May 2026.
Abstract Europa's double ridges often display lower albedo and redder color than their surroundings. Their unique topography may cause sublimation‐driven darkening due to illumination and self‐heating—the process of thermal segregation. We apply an advanced 3D thermophysical model, including shadowing and self‐heating through mutual exchange of ...
Kya C. Sorli, Paul O. Hayne, Lucas Lange, Sylvain Piqueux   +3 more
wiley   +1 more source

Olivine Microstructure Constraints on Ureilite Parent Body Deformation

Journal of Geophysical Research: Planets, Volume 131, Issue 5, May 2026.
Abstract Ureilites are ultramafic achondrites for which the parent body is unknown. Monomict ureilites, consisting primarily of olivine and pyroxene, are thought to represent mantle residues, carrying essential information for their parent body deformation history.
Yaozhu Li, Phil J. A. McCausland, Roberta L. Flemming, Callum J. Hetherington, Bo. Zhao   +4 more
wiley   +1 more source

Rotationally Resolved Spectroscopy of Asteroid Pairs: No Spectral Variation Suggests Fission is followed by Settling of Dust

, 2014
We examine the spectral properties of asteroid pairs that were disrupted in the last 2 Myrs to examine whether the site of the fission can be revealed.
Binzel, Richard P., DeMeo, Francesca, Moskovitz, Nicholas, Polishook, David   +3 more
core   +1 more source

Heterogeneous mass distribution of the rubble-pile asteroid (101955) Bennu

Science Advances, 2020
The asteroid (101955) Bennu has a heterogeneous internal mass distribution with an underdense center and equatorial bulge. The gravity field of a small body provides insight into its internal mass distribution.
D. Scheeres, A. French, P. Tricarico, S. Chesley, Y. Takahashi, D. Farnocchia, J. McMahon, D. Brack, A. Davis, R. Ballouz, E. Jawin, B. Rozitis, J. Emery, A. Ryan, R. Park, B. Rush, N. Mastrodemos, B. Kennedy, J. Bellerose, D. Lubey, D. Velez, Andrew T. Vaughan, J. Leonard, J. Geeraert, B. Page, P. Antreasian, E. Mazarico, K. Getzandanner, D. Rowlands, M. Moreau, J. Small, D. Highsmith, S. Goossens, S. Goossens, E. Palmer, J. Weirich, R. Gaskell, O. Barnouin, M. Daly, J. Seabrook, M. A. Asad, L. Philpott, Catherine L. Johnson, Catherine L. Johnson, C. Hartzell, V. Hamilton, P. Michel, K. Walsh, M. Nolan, D. Lauretta   +49 more
semanticscholar   +1 more source

Aperture photometry on asteroid trails. Detection of the fastest-rotating near-Earth object [PDF]

Astronomy & Astrophysics
Near-Earth objects (NEOs) on an impact course with Earth can move at high angular speeds. Understanding their properties, including their rotation state, is crucial for assessing impact risks and mitigation strategies.
M. Devogéle, L. Buzzi, M. Micheli, J. L. Cano, L. Conversi, E. Jehin, M. Ferrais, Francisco Ocaña, D. Fohring, Charlie Drury, Z. Benkhaldoun, P. Jenniskens   +11 more
semanticscholar   +1 more source

Bio‐Inspired Swarm Robotics Design for Mine Automation

Natural Sciences, Volume 6, Issue 2, April 2026.
Ants demonstrate tandem running for cooperative haulage, and honeybees use memory‐based routes between hive and flowers. These behaviours inspire autonomous haulage robots in open‐pit mines to achieve efficient scan‐plan‐retrieve ore transport, replacing small haulage robots with large mining trucks.
Joven Tan, Noune Melkoumian, David Harvey   +2 more
wiley   +1 more source

A Photometric Survey of over 200 V-type Asteroids and Their Phase-curve Analysis

The Astrophysical Journal Supplement Series
V-type asteroids are considered to be crustal fragments of asteroid (4) Vesta and possibly of other differentiated parent bodies that once existed in the main asteroid belt.
Adrián Galád, Edyta Podlewska-Gaca, Jozef Világi, Štefan Gajdoš, L‌̌udovít Polčic, Dagmara Oszkiewicz, Agnieszka Kryszczyńska, Dariusz Grzegorzek   +7 more
doaj   +1 more source

Photometry and Polarimetry of 2010 XC15: Observational Confirmation of E-type Near-Earth Asteroid Pair

The Astrophysical Journal, 2023
Asteroid systems such as binaries and pairs are indicative of the physical properties and dynamical histories of small solar system bodies. Although numerous observational and theoretical studies have been carried out, the formation mechanism of asteroid
Jin Beniyama, Shigeyuki Sako, Katsuhito Ohtsuka, Tomohiko Sekiguchi, Masateru Ishiguro, Daisuke Kuroda, Seirato Urakawa, Fumi Yoshida, Asami Takumi, Natsuho Maeda, Jun Takahashi, Seiko Takagi, Hiroaki Saito, Tatsuya Nakaoka, Tomoki Saito, Tomohito Ohshima, Ryo Imazawa, Masato Kagitani, Satoshi Takita   +18 more
doaj   +1 more source

The Active Asteroids

, 2015
Some asteroids eject dust, producing transient, comet-like comae and tails; these are the active asteroids. The causes of activity in this newly-identified population are many and varied.
Agarwal, Jessica, Hsieh, Henry, Jewitt, David   +2 more
core   +1 more source