Results 81 to 90 of about 8,432 (197)
Down But Not Out: The Case of Long-period Comet C/2021 O3 (Panstarrs)
The Astronomical JournalWe combine ground- and space-based observations of long-period comet C/2021 O3 (Panstarrs; perihelion distance 0.287 au) in order to investigate its reported near-perihelion destruction.
David Jewitt +3 more
doaj +1 more source
Frontiers in Genetics, 2015 The alkaline comet assay (pH 12.3) is a useful method for monitoring genotoxic effects of environmental pollutants in the root nuclei of Allium cepa and various plants; it allows the detection of single- and double-strand breaks, incomplete excision ...
Messaouda Khallef +3 more
doaj +1 more source
The FEBS Journal, EarlyView.DNA damage in the tardigrade Hypsibius exemplaris elicits distinct cellular outcomes depending on replication status. While non‐replicating cells tolerate genotoxic stress, constitutively replicating cells undergo irreversible replication failure upon DNA damage, leading to loss of tissue homeostasis, fat depletion, sterility, and organismal death ...
Gonzalo Quiroga‐Artigas +4 more
wiley +1 more source
Deep learning-enabled size estimation of comets indicates a more dynamic early solar system
Nature CommunicationsThe formation and evolution of the Solar System’s two major comet reservoirs, the Oort Cloud and the Scattered Disk, remain poorly constrained. Observations of comet flux imply a population ratio between these reservoirs that exceeds predictions from ...
Shunjing Zhao +4 more
doaj +1 more source
3SD: Rotational symmetry single‐shot denoising in fluorescence microscopy
Journal of Microscopy, EarlyView.Abstract Image noise is a fundamental problem in fluorescence microscopy analysis, especially in live cell imaging applications where the number of detected photons is limited due to low power of excitation lasers to prevent phototoxicity during extended imaging experiments.
Tijmen H. de Wolf +4 more
wiley +1 more source
Journal of Anatomy, EarlyView.New World vultures are the only avian clade proposed to lack a syrinx and have been described as non‐vocal. Using dissection, diceCT, and histology, we demonstrate that cathartid vultures have novel syringeal features that form a syrinx and vocal characterization reveals that they produce more complex vocalizations than previously reported.
Bradley A. Ibarra +3 more
wiley +1 more source
The Astrophysical Journal LettersWe 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 +4 more
doaj +1 more source
Oral Diseases, EarlyView.ABSTRACT Objective Head and neck cancer radiotherapy can lead to jaw osteoradionecrosis (ORN). There is currently no definitive treatment for ORN. The efficacy of a novel orally delivered aglycosylated IGF‐1 with an E‐peptide (CTB‐Pro‐IGF‐1), bioencapsulated in plant cells, was evaluated as therapy for jaw ORN in rats. Materials and Methods Rat jaw ORN
Sunday O. Akintoye +5 more
wiley +1 more source
Reversal of Spin: Comet 41P/Tuttle–Giacobini–Kresak
The Astronomical JournalThe rotations of cometary nuclei are known to change in response to outgassing torques. The nucleus of the Jupiter-family comet 41P/Tuttle–Giacobini–Kresak exhibited particularly dramatic rotational changes when near perihelion in 2017 April.
David Jewitt
doaj +1 more source
Fish Sperm Subpopulations Detection, Separation, and Application: Current State and Trends
Reviews in Aquaculture, Volume 18, Issue 4, September 2026.Modern advances in sperm biology highlight the necessity of recognising intra‐ejaculate heterogeneity as a central concept for advancing both the fundamental understanding of fertilisation processes and the development of artificial reproduction techniques in fishes. ABSTRACT Sperm subpopulations represent a fundamental manifestation of intra‐ejaculate
Viktoriya Dzyuba +2 more
wiley +1 more source