Results 81 to 90 of about 1,994 (199)

The magnitude distribution and evolution of short-period comets [PDF]

Monthly Notices of the Royal Astronomical Society, 2002
The magnitude distribution, perihelion distribution, nucleus size variation and evolution of the short-period comet population are re-assessed. Short-period comets with perihelion distances greater than 2 au have a magnitude distribution index of about 2.3, similar to that of the long-period comets.
openaire   +1 more source

Primary cardiac T‐cell rich large B‐cell lymphoma causing aortic stenosis with metastasis in a Warmblood

Equine Veterinary Education, EarlyView.
Summary An 18‐year‐old Warmblood mare was presented to the Royal Veterinary College Equine Referral Hospital for investigation of progressive periocular and facial swelling, weight loss and tachycardia. Physical examination additionally identified bilateral pansystolic (grade 5/6 basilar left‐sided, 2/6 right‐sided), cardiac murmurs, submandibular ...
S. E. Talbot, F. Z. X. Lean, H. M. Martineau, B. Dunkel, J. Reed   +4 more
wiley   +1 more source

On the Border: Searching for Cometary Activity near the Centaur–JFC Transition Line

The Planetary Science Journal
Current wide-field surveys discover ∼15 Jupiter-family comets (JFCs) each year, typically identified via visual detection of a dust coma or tail. The same surveys also discover many asteroids that have distant JFC-like orbits, but with no reported ...
A. Fraser Gillan, Alan Fitzsimmons, Colin Orion Chandler, Colin Snodgrass, Joseph Murtagh   +4 more
doaj   +1 more source

Planetary perturbations and the origins of short-period comets

The Astrophysical Journal, 1990
To investigate the dynamical plausibility of possible sources for the short-period comets, a representative sample of comet orbits in the field of the sun and the giant planets was integrated, with the aim to determine whether the distribution of orbits from a proposed source that reach observable perihelia (q less than 2.5 AU) matches the observed ...
T. Quinn, S. Tremaine, M. Duncan
openaire   +1 more source

Analysing Resilience Indicator Traits in Austrian Fleckvieh, Brown Swiss and Holstein‐Friesian Cattle

Journal of Animal Breeding and Genetics, EarlyView.
ABSTRACT Recent studies suggest that variations in milk yield during lactation can serve as a metric for assessing individual resilience, with minimum fluctuations reflecting greater resilience in cows. With automatic milking systems, multiple records can be obtained from many cows on a daily basis. Given that animals are continually exposed to a range
M. Agyiri, R. Onzima, A. Costa, B. Fuerst‐Waltl, F. Steininger, C. Egger‐Danner, G. Mészáros, J. Sölkner   +7 more
wiley   +1 more source

Covertly Active Comet (139359) 2001 ME1

The Planetary Science Journal
On 2018 November 18, coronagraphs onboard the Solar and Heliospheric Observatory (SOHO) captured an unrecognized comet crossing its fields of view. We identified this comet to be the minor planet (139359) 2001 ME _1 , whose previously unnoticed dust ...
Qicheng Zhang, Quanzhi Ye, Karl Battams, Matthew M. Knight, Worachate Boonplod, Rainer Kracht   +5 more
doaj   +1 more source

The PagDMG6341–PagWD40–PagPOLD4 Module Coordinates Base Excision Repair in ‘84K’ Poplar (Populus alba × P. glandulosa)

Plant Biotechnology Journal, EarlyView.
ABSTRACT Base excision repair (BER) is a critical pathway for repairing damaged DNA bases in cells; however, the mechanisms of protein recruitment and interaction in this pathway remain largely unexplored in higher plants. In this study, we used ‘84K’ poplar (Populus alba × P.
Aoyu Ling, Yijia Jin, Yufei Xia, Shenxiu Jiang, Jianghai Shu, Xiaotong Hu, Kang Du, Pingdong Zhang, Xiangyang Kang   +8 more
wiley   +1 more source

Search for the True Parent Body of the Phoenicid Meteor Shower

The Astronomical Journal
In 2024, Ďurišová et al. found that the meteor shower Phoenicids, IAU No. 254, code PHO, can originate in the nuclei of three comets, 46P/Wirtanen, 104P/Kowal 2, and 289P/Blanpain.
Martina Kováčová, Luboš Neslušan, Dušan Tomko   +2 more
doaj   +1 more source

Harnessing blue light photobiomodulation for cancer therapy: Evidence from a systematic review

Photochemistry and Photobiology, EarlyView.
Conventional treatments for various types of cancer are often associated with tumor recurrence and aggressiveness. Photobiomodulation with blue light (BL; 450–470 nm) emerges as a promising alternative with antitumor effects. This systematic review, with 37 in vitro and in vivo studies from 2002 to 2024, revealed that BL reduces cell viability ...
Bárbara Evelyn Santos de Lima, Rebeca Barros Nascimento, Ana Paula Mariano Santos Ginez, Maria Stella Moreira, Rebeca Boltes Cecatto, Rodrigo Labat Marcos, Maria Fernanda Setúbal Destro Rodrigues   +6 more
wiley   +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