Results 71 to 80 of about 312,980 (227)

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

Three-dimensional maps of all chromosomes in human male fibroblast nuclei and prometaphase rosettes [PDF]

, 2005
Studies of higher-order chromatin arrangements are an essential part of ongoing attempts to explore changes in epigenome structure and their functional implications during development and cell differentiation.
Kreth Gregor, Michael R Speicher, Bolzer Andreas, Cremer Christoph, Kreth, G., Andreas Bolzer (83), Cremer, Christoph, Eils, R., Christoph Cremer, Christoph Cremer (91), Fauth Christine, Irina Solovei, Solovei, Irina, Daniela Koehler, Gregor Kreth (84), Eils, Roland, Gregor Kreth, Kaan Saracoglu, Bolzer, Andreas, Koehler Daniela, Irina Solovei (85), Fauth, C., Thomas Cremer (93), Bolzer, A., Speicher, Michael R., Müller Stefan, Solovei Irina, Müller, Stefan, Saracoglu, Kaan, Stefan Müller, Fauth, Christine, Roland Eils (90), Kreth, Gregor, Cremer Thomas, Koehler, D., Stefan Müller (89), Michael R Speicher (27551), Thomas Cremer, Solovei, I., Roland Eils, Müller, S., Cremer, C., Koehler, Daniela, Speicher, M.R., Eils Roland, Speicher Michael R, Cremer, Thomas, Andreas Bolzer, Daniela Koehler (86), Christine Fauth (88), Cremer, T., Saracoglu Kaan, Christine Fauth, Kaan Saracoglu (87), Saracoglu, K.   +54 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

Spin-dependent μ→e conversion

Physics Letters B, 2017
The experimental sensitivity to μ→e conversion on nuclei is expected to improve by four orders of magnitude in coming years. We consider the impact of μ→e flavour-changing tensor and axial-vector four-fermion operators which couple to the spin of ...
Vincenzo Cirigliano, Sacha Davidson, Yoshitaka Kuno   +2 more
doaj   +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

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

Cytogenotoxic and Molecular Assessment of Pyrethrins on Non‐Target Allium cepa Roots

Environmental Toxicology, EarlyView.
ABSTRACT The pyrethrins, which form a part of naturally occurring insecticidal chemicals derived from chrysanthemum flowers, not only provide rapid knockdown of a broad spectrum of insect pests but are also widely used in integrated pest management due to a generally favorable safety profile, largely attributed to low mammalian toxicity.
Yudum Yeltekin Uğur, Rahsan Ilikci‐Sagkan, Recep Liman   +2 more
wiley   +1 more source

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

Quantitative collagen and proteoglycan imaging reveal organic layering, gradients and regional texture in young mature dental cementum

VIEW, EarlyView.
Cementum, the mineralized tissue covering all mammalian tooth roots, helps maintain tooth stability, but its internal organization is still poorly understood. In this study, we combine quantitative histologial methods to map the regional distributions of collagen fibers and proteoglycan‐rich matrix layers in porcine cementum.
Jie Zhen, Yuyang Mao, Hamza Elfarraj, Paul Zaslansky   +3 more
wiley   +1 more source