Mostrando 41 - 60 Resultados de 62 Para Buscar 'Much Hadham~', tiempo de consulta: 1.24s Limitar resultados
  1. 41
    por Lenihan, Edmund
    Publicado 2003
    Libro
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    “…Today we know that the chemical and physical conditions for life to flourish on Earth were at work much earlier than thought, i.e., earlier than 4.4 billion years ago. …”
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  10. 50
    por Russell, Michael J.
    Publicado 2021
    “…In place of the supposed warm little pond, we offer a well-protected mineral mound precipitated at a submarine alkaline vent as life’s womb: in place of lipid membranes, we suggest peptides; we replace poisonous cyanide with ammonium and hydrazine; instead of deleterious radiation we have the appropriate life-giving redox and pH disequilibria; and in place of messy chemistry we offer the potential for life’s emergence from the simplest of geochemically available molecules and ions focused at a submarine alkaline vent in the Hadean—specifically within the nano-confined flexible and redox active interlayer walls of the mixed-valent double layer oxyhydroxide mineral, fougerite/green rust comprising much of that mound.…”
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  11. 51
    “…We identified 524 DHSs that are conserved in nonhuman primates but accelerated in the human lineage (haDHS), and estimate that 70% of substitutions in haDHSs are attributable to positive selection. …”
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  12. 52
    “…Although early metabolic evolution may cause strong climatic instability, a low CO:CH(4) atmospheric ratio emerges as a robust signature of simple methane-cycling ecosystems on a globally reduced planet such as the late Hadean/early Archean Earth.…”
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  14. 54
    “…Future decreases of as much as −71% in the 2071–2099 period were estimated for the southeastern, central and northwestern parts of the country. …”
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  15. 55
    “…Since the energy flux of space weather, which generated frequent SEPs from the young Sun in the first 600 million years after the birth of the solar system, was expected to be much greater than that of GCRs, we conclude that SEP-driven energetic protons are the most promising energy sources for the prebiotic production of bioorganic compounds in the atmosphere of the Hadean Earth.…”
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  16. 56
    “…Colonies of the holaxonian Calcigorgia spiculifera were tagged beginning in 1999 at three sites in Chatham Strait, Southeast Alaska, using scuba and their growth measured annually for up to 5 years. …”
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  18. 58
    Publicado 2001
    Tabla de Contenidos: “…Of conversation -- Of speaking too much, or too little. And how we ought to speak -- Sor Juana Ines de la Cruz. …”
    Libro
  19. 59
    por Russell, Michael J.
    Publicado 2023
    “…While the conditions here are very much less bountiful, they do offer the similar feed and disequilibria the survivors are accustomed to. …”
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  20. 60
    “…Also, the new ensemble approach employed ecological niche modelling algorithms (including Maximum Entropy, Random Forests and Support Vector Machines) that have been widely adopted since 2003 and perform better than GARP, as well as using a more recent climate change model (HadGEM2) considered to have better performance at higher resolution than the earlier one (HadCM2). …”
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