Results 71 to 80 of about 549,270 (251)

DNA damage induced by mutagens in plant and human cell nuclei in acellular comet assay.

Folia Histochemica et Cytobiologica, 2006
Higher plant cells have a long tradition of use in the studies on environmental mutagenesis in situ, especially in relation to human health risk determination.
Jolanta Maluszynska, Agnieszka Gnys, Jolanta Juchimiuk   +2 more
doaj   +1 more source

Untreated Hair Dye Effluents Enter the Environment: Are They a Threat to Human Health?

Environmental Toxicology, EarlyView.
ABSTRACT The effluents generated during the process of hair dyeing exhibit a complex composition, comprising chemical compounds with varying toxicity levels. While the adverse impact of hair dyes on human health is acknowledged, there is a notable absence of studies addressing the toxicity associated with effluents produced during these activities. The
Letícia Cristina Gonçalves, Matheus Mantuanelli Roberto, Adriana Fabiana Corrêa da Silva, Maria Aparecida Marin‐Morales   +3 more
wiley   +1 more source

Late Pebble Accretion of Comet 81P/Wild 2 Nucleus: Evidence from a Plagioclase-bearing Chondrule Fragment, Pyxie

The Astrophysical Journal
Comet 81P/Wild 2 is a ∼4.5 km-sized primordial object that almost has not been modified by internal heating by ^26 Al decay. Its nucleus could have been formed by hierarchical agglomeration or gravitational collapse of pebble swarms concentrated by ...
Mingming Zhang, Michael E. Zolensky, Kohei Fukuda, Daisuke Nakashima, Michael K. Weisberg, Noriko T. Kita   +5 more
doaj   +1 more source

The Dust Trail of Comet 67P/Churyumov-Gerasimenko

, 2007
We report the detection of comet 67P/Churyumov-Gerasimenko's dust trail and nucleus in 24 micron Spitzer Space Telescope images taken February 2004. The dust trail is not found in optical Palomar images taken June 2003.
A'Hearn, A'Hearn, A'Hearn, Agarwal, Agarwal, Brownlee, Burns, Colangeli, David J. Lien, Fernández, Fomenkova, Fukugita, Fulle, Fulle, Fulle, Fulle, Gehrz, Giorgini, Glassmeier, Green, Groussin, Groussin, Hanner, Harker, Harker, Harris, Hörz, Ishiguro, Ishiguro, Ishiguro, Jenniskens, Jenniskens, Keller, Kidger, Kimura, Kolokolova, Lamy, Lamy, Lamy, Lasue, Lebofsky, Levasseur-Regourd, Lisse, Lisse, Lisse, Lisse, Mathis, McDonnell, McDonnell, Meech, Michael S. Kelley, Neckel, Osip, Reach, Reach, Rieke, Schleicher, Smith, Spencer, Spitzer Science Center, Sykes, Sykes, Vaubaillon, Werner, William T. Reach   +64 more
core   +1 more source

Micronuclei and Other Nuclear Abnormalities in Patella Limpet as Biomarkers of Cytogenotoxicity in Recreational Port Waters

Environmental Toxicology, EarlyView.
ABSTRACT Over the past decades, the growth in human population and economic activities has led to an increase in maritime traffic. This rise puts additional pressure on marine environments, vessel fuel spills being considered to have a major impact on the ecosystem.
Carlos Valiente‐Diaz, Eva Garcia‐Vazquez, Verónica Soto‐López   +2 more
wiley   +1 more source

Multiple Outbursts of Halley-type Comet 12P/Pons–Brooks

The Astronomical Journal
We present optical observations of the Halley-type comet 12P/Pons–Brooks (12P) on its approach to perihelion. The comet was active even in the first observations at ∼8 au.
David Jewitt, Jane Luu
doaj   +1 more source

2006 Fragmentation of Comet 73P/Schwassmann-Wachmann 3B Observed with Subaru/Suprime-Cam

, 2009
We analyzed the Subaru/Suprime-Cam images of 73P/Schwassmann-Wachmann 3B and detected no fewer than 154 mini-comets. We applied synchrone-syndyne analysis, modified for rocket effect analysis, to the mini-fragment spatial distribution. We found that most
Ishiguro, Masateru, Sarugaku, Yuki, Ueno, Munetaka, Usui, Fumihiko   +3 more
core   +1 more source

A Distribution of Large Particles in the Coma of Comet 103P/Hartley 2 [PDF]

, 2015
The coma of comet 103P/Hartley 2 has a significant population of large particles observed as point sources in images taken by the Deep Impact spacecraft. We measure their spatial and flux distributions, and attempt to constrain their composition.
A'Hearn, Michael F., Bodewits, Dennis, Hermalyn, Brendan, Kelley, Michael S., Kissel, Jochen, Kolokolova, Ludmilla, Lindler, Don J., Lisse, Carey M.   +7 more
core   +1 more source

Cytogenotoxic Effects of Fluopyram in Allium cepa Root Cells Involving Microtubule Disruption

Environmental Toxicology, EarlyView.
ABSTRACT Fluopyram is a next‐generation fungicide widely used in agriculture; however, its persistence in soils and mobility toward aquatic systems have raised concerns regarding potential ecotoxicological risks. This study evaluated the cytogenotoxic effects of a commercial fluopyram‐based pesticide formulation on Allium cepa root meristem cells ...
Carlos Filipe Camilo‐Cotrim, Natanael Alves da Silva, Gabriela Gomes Lima, Igor Rodrigues Vasconcelos, Luciana Souza Ondei, Elisa Flávia Luiz Cardoso Bailão, Antônio Sérgio Nakao de Aguiar, Marcelino Benvindo‐Souza, Leonardo Luiz Borges, Virgínia Damin, Luciane Madureira Almeida   +10 more
wiley   +1 more source

The Evolution of Activity and Chemical Composition in Rosetta’s Comet Targets across Multiple Apparitions: Complications for CS2 as the CS Parent in Comet Nuclei

The Planetary Science Journal, 2023
Jupiter-family comets are ephemeral small bodies injected into the inner solar system from the Kuiper Belt, doomed to either sublimate all their volatiles and become inert or violently shatter from the activity.
John W. Noonan, Joel Wm. Parker, Walter M. Harris, Steven Bromley, Mohammad Saki, Youssef Moulane, Davide Farnocchia, Marco Micheli, Jian-Yang Li, Kathleen E. Mandt, Kumar Venkataramani, Dennis Bodewits   +11 more
doaj   +1 more source