Mostrando 3,061 - 3,080 Resultados de 3,134 Para Buscar '"comet"', tiempo de consulta: 0.33s Limitar resultados
  1. 3061
    “…Both extracts showed a protective role during pre-treatment and co-treatment against Cd toxicity by exerting a reduction in malondialdehyde (MDA) content and the percentage of DNA damage in tail and tail length of the comets over the Cd-treated cells. However, the Se-RG indicated additional benefits in all properties over RG. …”
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  2. 3062
    “…Specific and unspecific viroid degradation with some preference for (−) chains occurred in pollen, as detected by analysis of viroid-derived small RNAs, by quantification of viroid levels and by detection of viroid degradation products forming “comets” on Northern blots. The decrease of viroid levels during pollen development correlated with mRNA accumulation of several RNA-degrading factors, such as AGO5 nuclease, DICER-like and TUDOR S-like nuclease. …”
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  3. 3063
    “…In growing root hair cells, ARK1 comets predominantly localize on the growing-end of microtubules and partially overlap with RHD3 in the cortex of the subapical region. …”
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  4. 3064
    “…Moreover, the recent introduction of the trans-oral endoscopic thyroidectomy with vestibular approach, although the safety and the efficacy are still under discussion, deserves particular attention since it represents the only technique truly scarless and provides the best cometic result. The purpose of this article is to provide an overview of the current main alternative approaches for the treatment of thyroid cancer with particular focus on the oncological effectiveness of the procedures.…”
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  5. 3065
    por Baum, Seth D.
    Publicado 2022
    “…The paper analyzes natural climate change, natural pandemics, near-Earth objects (asteroids, comets, and meteors), space weather (coronal mass ejections, solar flares, and solar particle events), stellar explosions (gamma-ray bursts and supernovae), and volcanic eruptions. …”
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  6. 3066
    por Harwit, Martin
    Publicado 2006
    “…With this approach, individual astronomical objects (white dwarfs, supernovae, comets, quasars) are mentioned wherever physical processes relevant to them are discussed, rather than in specifically dedicated sections. …”
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  7. 3067
    por Dollfus, Audouin
    Publicado 2013
    “…Through the telescope, one could see the nuclei of comets, revealing their very small size, and by using a micrometer one could measure the separation of double stars and the diameters of asteroids.  …”
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  8. 3068
    por Pelton, Joseph, Allahdadi, Firooz
    Publicado 2015
    “…This handbook brings together in a single reference work a rich blend of information about the various types of cosmic threats that are posed to human civilization by asteroids, comets, bolides, meteors, solar flares and coronal mass ejections, cosmic radiation and other types of threats that are only recently beginning to be understood and studied, such as investigation of the “cracks” in the protective shield provided by the Van Allen belts and the geomagnetosphere, of matter-antimatter collisions, orbital debris and radiological or biological contamination. …”
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  9. 3069
  10. 3070
  11. 3071
    por Booth, Richard A., Clarke, Cathie J.
    Publicado 2016
    “…Such objects would be concentrated in spiral features and could potentially produce larger icy planetesimals/comets by gravitational collapse. These planetesimals would acquire moderate eccentricities and remain unmodified over the remaining lifetime of the disc.…”
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  12. 3072
  13. 3073
    por Dyson, Freeman J
    Publicado 2000
    “…Sia che guardi al prossimo futuro terrestre sia che contempli la prospettiva non troppo lontana di insediamenti umani nello spazio - magari sulle «ospitali» comete della cintura di Kuiper -, Dyson ci ricorda, in polemica con i teorici kuhlliani delle rivoluzioni concettuali nella scienza, che «siamo e restiamo animali costruttori di strumenti»; soprattutto da questo ingegnoso artigianato dipendono le grandi scoperte, dal telescopio che inaugurò l'era moderna alle sofisticate strumentazioni della biologia molecolare, che vede la natura «comporre un genoma con la stessa intelligenza con la quale Mozart sapeva comporre un duo» .…”
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  14. 3074
    “…Comets are likely to contain various carbon oxide molecules potentially including C(O)OC and c-C [Formula: see text] O [Formula: see text] on their surfaces and comae, as well as their silicon-substituted analogues possibly playing a role in the formation of interstellar dust grains. …”
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  15. 3075
    “…The simple spectral analysis described in the paper can be useful for the detection of various kinds of trace aerosols—not only in the Earth’s atmosphere, but also during planetary missions in the environments of other astronomical objects such as planets, comets etc. We expect that the interpretation of data from spectrometric sounding of Venus and Mars during the current missions Mars and Venus Express, and later during the Rosetta mission will benefit from our experimental work and numerical modelling.…”
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  16. 3076
  17. 3077
  18. 3078
  19. 3079
    por Shapshak, Paul
    Publicado 2021
    “…Moreover, it is envisaged that via panspermia, terrestrial-like life and its precursors are transferred among galaxies, stars, and within solar systems via transiting comets, asteroids, and planetoids. In addition, expelled stars, which have solar systems, it is inferred, transfer life as well. …”
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  20. 3080
    “…We conclude that these chlorinated hydrocarbons are the reaction products of Martian chlorine and organic carbon derived from Martian sources (e.g., igneous, hydrothermal, atmospheric, or biological) or exogenous sources such as meteorites, comets, or interplanetary dust particles. KEY POINTS: First in situ evidence of nonterrestrial organics in Martian surface sediments . …”
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