Results 71 to 80 of about 9,305 (228)
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
Environmental Toxicology, EarlyView.ABSTRACT This study reports, for the first time, the use of the speckled cockroach Nauphoeta cinerea as a promising bioindicator for genotoxic monitoring. It was validated through control groups (both positive and negative) in addition to testing lettuce (Lactuca sativa ) samples from public street markets consumed by N. cinerea specimens in Pernambuco,
Aleson Aparecido da Silva +4 more
wiley +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 +3 more
wiley +1 more source
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 +2 more
wiley +1 more source
RFP for the Comet Nuclei Tour (CONTOUR)
, 1999 This document describes the ASC Star Tracker (performance, functionality, requirements etc.) to The Johns Hopkins University - Applied Physics Laboratory for their Comet Nuclei TOUR (CONTOUR ...
Thuesen, Gøsta +7 more
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The Astronomical JournalInterstellar objects provide a unique view into the formation of other star systems. Here we present spectroscopic observations of the recently discovered interstellar object 3I/ATLAS between a heliocentric distance of 3.7–1.8 au on either side of its ...
Kyle Medler +14 more
doaj +1 more source
Optimization of Neutral Comet Assay for studying DNA double-strand breaks in pea and wheat [PDF]
Journal of BioScience and Biotechnology, 2013 This study describes an adaptation of the Comet assay under neutral conditions for mono- and dicotyledonous plants pea (Pisum sativum L.) and wheat (Triticum aestivum L.).
Ivelina Nikolova +4 more
doaj
Frontiers in Genetics, 2015 The alkaline comet assay (pH 12.3) is a useful method for monitoring genotoxic effects of environmental pollutants in the root nuclei of Allium cepa and various plants; it allows the detection of single- and double-strand breaks, incomplete excision ...
Messaouda Khallef +3 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 +10 more
wiley +1 more source
Observational constraints on surface characteristics of comet nuclei
, 2002 Direct observations of the nuclear surfaces of comets have been difficult; however a growing number of studies are overcoming observational challenges and yielding new information on cometary surfaces. In this review, we focus on recent determinations of
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