Results 91 to 100 of about 9,305 (228)

Nucleus and Postperihelion Activity of Interstellar Object 3I/ATLAS Observed by the Hubble Space Telescope

The Astrophysical Journal Letters
We report the detection of the nucleus of interstellar object 3I/ATLAS, using a nucleus extraction technique on Hubble Space Telescope (HST) observations taken between 2025 December and 2026 January.
Man-To Hui, David Jewitt, Max J. Mutchler, Jessica Agarwal, Yoonyoung Kim   +4 more
doaj   +1 more source

Prolonged exposure to artificial light and carcinogenesis: A systematic review of oncostatic mechanisms associated with melatonin pathways

Photochemistry and Photobiology, EarlyView.
Exposure to artificial light at night (ALAN), particularly at blue wavelengths, disrupts circadian rhythms by suppressing melatonin, thereby increasing cancer susceptibility. This systematic review consolidates evidence linking prolonged ALAN exposure to an elevated risk of breast and prostate tumors.
Gabriel Barboza, Jêmina Oliveira, Antônio Ferreira, Renan Lopes, Marli Cupertino   +4 more
wiley   +1 more source

Comments on comet shapes and aggregation processes

, 1989
An important question for a comet mission is whether comet nuclei preserve information clarifying aggregation processes of planetary matter. New observational evidence shows that Trojan asteroids, as a group, display a higher fraction of highly-elongated
Hartmann, William K.
core  

On the Early Thermal Processing of Planetesimals during and after the Giant Planet Instability

The Planetary Science Journal
Born as ice-rich planetesimals, cometary nuclei were gravitationally scattered onto their current orbits in the Kuiper Belt and the Oort Cloud during the giant planets’ dynamical instability in the early stages of our solar system’s history.
Anastasios Gkotsinas, David Nesvorný, Aurélie Guilbert-Lepoutre, Sean N. Raymond, Nathan Kaib   +4 more
doaj   +1 more source

Muon-to-electron conversion in mirror fermion model with electroweak scale non-sterile right-handed neutrinos

Nuclear Physics B, 2018
The muon-to-electron conversion in aluminum, titanium and gold nuclei is studied in the context of a class of mirror fermion model with non-sterile right-handed neutrinos having masses at the electroweak scale.
P.Q. Hung, Trinh Le, Van Que Tran, Tzu-Chiang Yuan   +3 more
doaj   +1 more source

Mycoplasma bovis involved in pituitary abscess syndrome in a beef heifer concomitantly infected with haemoparasites

Veterinary Record Case Reports, Volume 14, Issue 3, August 2026.
Abstract This case report describes pituitary abscess syndrome (PAS) in a 20‐month‐old Blonde d'Aquitaine heifer with cranial nerve deficits (V, VII, VIII, IX, X and XII) associated with facial hemiparesis, head tilt, ataxia and dysphagia, pneumonia and otitis interna.
Chloé Saada, Manon Gonçalves‐Brandao, Hortensia Robert, Renaud Maillard, Laurent‐Xavier Nouvel   +4 more
wiley   +1 more source

On the rotation of cometary nuclei and small asteroids

, 1985
The spin rate distributions of comet nuclei and small asteroids are compared, and it is shown that Whipple's (1982) finding of a faster average rotation for the asteroid sample was due to observational biases.
P. Farinella, V. Zappalà, Farinella P., PAOLICCHI, PAOLO, Zappala V., P. Paolicchi   +5 more
core   +1 more source

The primordial nucleus of Comet 67P/Churyumov-Gerasimenko [PDF]

, 2015
International audienceObservations of Comet 67P/Churyumov-Gerasimenko by Rosetta show that the nucleus is bi-lobed, extensively layered, has a low bulk density, a high dust-to-ice mass ratio (implying high porosity), and weak strength except for a thin ...
Massironi, Matteo, Hviid, Stubbe, Fulle, Marco, Lopez-Moreno, Jose, Feller, Clement, Jorda, Laurent, Barbieri, Cesare, Kuehrt, Ekkehard, La Forgia, Fiorangela, Lazzarin, Monica, Davidsson, Björn, Thomas, Nicolas, A'Hearn, Michael, Bertaux, Jean-Loup, Lamy, Philippe, Kovacs, Gabor, Auger, Anne-Therese, Keller, Horst U., Debei, Stefano, Cremonese, Gabriele, Koschny, Detlef, Groussin, Olivier, Moissl-Fraund, Richard, Rickman, Hans, Rodrigo, Rafael, Gutiérrez, Pedro J., Barucci, Antonella, Mottola, Stefano, Pajola, Maurizio, Naletto, Giampiero, Ip, Wing-Huen, Lara, Luisa, Sierks, Holger, Marzari, Francesco, Kramm, Joerg-Rainer, Bertini, Ivano, Hoefner, Sebastian, Tubiana, Cecilia, da Deppo, Vania, Guettler, Carsten, Snodgrass, Colin, Fornasier, Sonia, de Cecco, Mariolino, Vincent, Jean-Baptiste, Kueppers, Michael, Oklay, Nilda, Knollenberg, Joerg, El-Maarry, Mohamed   +47 more
core   +2 more sources

ID3 deficiency alters chromatin accessibility at DSB sites and enhances vulnerability to HDAC inhibition

International Journal of Cancer, Volume 158, Issue 12, Page 3173-3186, 15 June 2026.
What's new? Errors in DNA double‐strand break (DSB) repair can lead to mutations, chromosomal instability, and ultimately cancer. Inhibitor of DNA‐binding 3 (ID3), a transcriptional repressor, is crucial to promoting DSB repair and helping maintain genome stability. Here, the authors investigated ID3 regulation of DNA repair via chromatin accessibility
Giuditta Della Corte, Hossam Eldesouky, Julia Puchan, Sercan Öz, Elena Everatt, Ashish Goyal, Gianluca Sigismondo, Udo Oppermann, Christoph Plass, Dieter Weichenhan, Ali Bakr   +10 more
wiley   +1 more source

Comet nuclei primordial aggregation effects on their internal structure

, 2009
Comet nuclei have a low density ( 500 kg.m-3, e.g. [1]) and are easily disrupted. In situ studies have unveiled surface features hinting at a pervasive internal layered structure on 9P/Tempel 1 [2].
Hadamcik, Edith, Lasue, Jérémie, Levasseur-Regourd, Anny Chantal, Kofman, W., Botet, R.   +4 more
core