Results 81 to 90 of about 8,069 (192)
Genetics and Molecular Biology, 2006 Cytotoxicity of metals is important because some metals are potential mutagens able to induce tumors in humans and experimental animals. Chromium can damage DNA in several ways, including DNA double strand breaks (DSBs) which generate chromosomal ...
Silvia Tamie Matsumoto +5 more
doaj +1 more source
Salud Pública de México, 2001 Objective. To assess the genotoxic activity of N-nitroso diethylamine (NDEA), maleic hydrazide (MH), and ethyl methane sulfonate (EMS) using two systems: the comet assay on nuclei from Tradescantia, and the pink mutation test on Tradescantia staminal ...
Carlos Alvarez-Moya +5 more
doaj
Cytotoxic and genotoxic effects of perfluorododecanoic acid (PFDoA) in Japanese medaka
Knowledge and Management of Aquatic Ecosystems, 2018 This study investigated the cytotoxic and genotoxic potential of perfluorododecanoic acid (PFDoA), a perfluorinated carboxylic chemical (PFC) that has broad applications and distribution in the environment in Japanese medaka, Oryzias latipes ...
Ayanda Isaac O +3 more
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Investigating Local- and Global-scale Dust Redistribution on Comet 67P/Churyumov–Gerasimenko
The Planetary Science JournalWe use a 3D dynamical Monte Carlo model to simulate the trajectories of individual dust grains and map their redeposition across the surface of comet 67P/Churyumov–Gerasimenko.
Jacob L. Kloos +3 more
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Genetics and Molecular Biology, 2011 The aim of this study was to use the Comet assay to assess genetic damage in the direct-developing frog Eleutherodactylus johnstonei. A DNA diffusion assay was used to evaluate the effectiveness of alkaline, enzymatic and alkaline/enzymatic treatments ...
Laura Carolina Valencia +3 more
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Predictions for Sparse Photometry of Jupiter-family Comet Nuclei in the LSST Era
The Planetary Science JournalThe Legacy Survey of Space and Time (LSST) at Vera C. Rubin Observatory will deliver high-quality, temporally sparse observations of millions of solar system objects on an unprecedented scale.
A. Donaldson +3 more
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The Astrophysical JournalAmorphous ice is understood to be the predominant phase of water in cometary nuclei. A significant number of other volatiles can be trapped in amorphous H _2 O ice and released during the amorphous-to-crystalline phase transition (ACPT).
Rahul K. Kushwaha +2 more
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On measuring the size of nuclei of comets
, 2014 Possibilities of measuring the size of nuclei of comets hidden by dust clouds are discussed. To this end, the dust cloud should be irradiated with a flow of rods accelerated in a linear mass accelerator to the velocity six kilometers per second. Each rod should be equipped with a transmitter with a power of one microwatt, which is destroyed in a ...
openaire +2 more sources
Bulk Properties and Evolution of Jupiter-Family Comet Nuclei [PDF]
, 2018 This thesis presents the results from photometric time-series observations of Jupiter-family comets (JFCs). A method was developed that allows mutual absolute photometric calibration of data taken at different epochs with different instruments and results in absolute-calibration uncertainty of ∼0.02 mag.
openaire +1 more source
JWST Detection of a Carbon-dioxide-dominated Gas Coma Surrounding Interstellar Object 3I/ATLAS
The Astrophysical Journal Letters3I/ATLAS is the third confirmed interstellar object to visit our solar system and only the second to display a clear coma. Infrared spectroscopy with the James Webb Space Telescope (JWST) provides the opportunity to measure its coma composition and ...
Martin A. Cordiner +12 more
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