Results 111 to 120 of about 549,270 (251)

Observation and Coordination Needs for Current, Near‐Future, and Next Generation Earth‐Observing SAR Systems

Earth and Space Science, Volume 13, Issue 5, May 2026.
Abstract This paper summarizes an evaluation by experts of how coordination of Earth‐observing Synthetic Aperture Radar (SAR) missions among the world's space agencies could advance toward game‐changing scientific discoveries and fully realizing SAR's practical capability to address many issues facing society.
Cathleen E. Jones, Ake Rosenqvist, Björn Rommen, Magdalena Fitrzyk, Eric Rignot, Bernd Scheuchl, Yujie Zheng, Andrew Hooper, Mark Simons, Tomokazu Kobayashi, Paul Siqueira, Maurizio Santoro, Takeo Tadono, Laura Hess, Heather McNairn, Laura Frulla, Malin Johansson, Wolfgang Dierking, Line Rouyet, Annett Bartsch, Paco Lopez Dekker, Johnny A. Johannessen   +21 more
wiley   +1 more source

The JaCVAM / OECD activities on the comet assay

Frontiers in Genetics, 2015
The in vivo alkaline single cell gel electrophoresis assay, also called alkaline comet assay is a method measuring DNA strand breaks in eukaryotic cells.
Hajime Kojima
doaj   +1 more source

CRAF Mission: An opportunity for exobiology [PDF]

The Halley missions of 1986 gave us a first, quick glimpse of a comet nucleus and the first in situ measurements of cometary gas and dust. Many of our basic ideas about cometary nuclei were confirmed while a number of startling new discoveries were also ...
Neugebauer, Marcia, Weissman, Paul
core   +1 more source

Mid-Infrared Spectrophotometric Observations of Fragments B and C of Comet 73P/Schwassmann-Wachmann 3

, 2010
We present mid-infrared spectra and images from the GEMINI-N (+Michelle) observations of fragments SW3-[B] and SW3-[C] of the ecliptic (Jupiter Family) comet 73P/Schwassmann-Wachmann 3 pre-perihelion.
Boss, Bradley, Bregman, Charles E. Woodward, Crovisier, Crovisier, Crovisier, Crovisier, David E. Harker, David K. Lynch, Diane H. Wooden, Dorschner, Ebel, Edoh, Ehrenfreund, Hanner, Hanner, Harker, Harker, Harker, Howell, Jones, Joyce, Jäeger, Kelley, Kelley, Kemper, Kemper, Li, Lisse, Lord, McDonnell, Meech, Michael L. Sitko, Michael S. Kelley, Moreno, Orosei, Oört, Ray W. Russell, Scotti, Sekanina, Sitko, Stansberry, Watanabe, Watanabe, Weaver, Wooden, Wooden, Wooden, Wooden, Wooden   +50 more
core   +1 more source

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

Plant Biotechnology Journal, Volume 24, Issue 5, Page 2956-2969, May 2026.
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

Dust and gas emission from cometary nuclei: the case of comet 67P/Churyumov–Gerasimenko

Advances in Physics: X, 2018
Comets display with decreasing solar distance an increased emission of gas and dust particles, leading to the formation of the coma and tail. Spacecraft missions provide insight into the temporal and spatial variations of the dust and gas sources located
Tobias Kramer, Matthias Noack, Daniel Baum, Hans-Christian Hege, Eric J. Heller   +4 more
doaj   +1 more source

Zinc induces DNA damage in tobacco roots

Biologia Plantarum, 2013
We applied the alkaline version of the single-cell gel electrophoresis (comet assay) to seedlings of heterozygous tobacco (Nicotiana tabacum L. var. xanthi) treated with zinc acetate dihydrate (20 to 80 mM Zn2+ for 2 h or 2 to 12 mM Zn2+ for 24 h).
D. Procházková, N. Wilhelmová, D. Pavlíková, J. Száková, T. Gichner   +4 more
doaj   +1 more source

Impact of Seasonal Composition on the Long‐Term Performance of Post‐Consumer Recycled Polypropylene

Journal of Applied Polymer Science, Volume 143, Issue 15, April 15, 2026.
Ten batches of post‐consumer polypropylene recyclate were examined over a period of 15 months. Despite identical MFR and density specifications, there were significant differences in their composition, affecting mechanical performance. Elongation at break and crack resistance varied particularly strongly.
Jessica Hinczica, Linda M. Schatz, Jutta Geier, Mario Messiha, Márton Bredács, Thomas Koch, Gerald Pinter, Florian Arbeiter   +7 more
wiley   +1 more source

Genotoxicity and mutagenicity of water contaminated with tannery effluents, as evaluated by the micronucleus test and comet assay using the fish Oreochromis niloticus and chromosome aberrations in onion root-tips

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, Mário Sérgio Mantovani, Mirtis Irene Ariza Malaguttii, Ana Lúcia Dias, Inês Cristina Fonseca, Maria Aparecida Marin-Morales   +5 more
doaj   +1 more source

Evaluation of genotoxic activity of maleic hydrazide, ethyl methane sulfonate, and N-nitroso diethylamine in Tradescantia Evaluación de la genotoxicidad de hidrazida málica, N-nitroso dietilamina, y etil metano sulfonato, en núcleos de Tradescantia, por medio de la prueba del cometa

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, Anne Santerre-Lucas, Guillermo Zúñiga-González, Olivia Torres-Bugarín, Eduardo Padilla-Camberos, Alfredo Feria-Velasco   +5 more
doaj