Mostrando 121 - 140 Resultados de 3,549 Para Buscar '"amphibian"', tiempo de consulta: 0.08s Limitar resultados
  1. 121
  2. 122
    Publicado 1993
    “…Lampbrush chromosomes from oocytes of the amphibian Triturus cristatus have been used to examine the role of histone acetylation in transcription by indirect immunofluorescence with antisera to H4 acetylated at specific lysine residues. …”
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  3. 123
  4. 124
    por Uhlenhuth, Eduard
    Publicado 1919
    “…That the germ cells can develop in amphibians either before or after metamorphosis does not mean that the germ plasma is opposed as a unit to the somatic plasma, since other organs which are believed to be part of the somatic plasma behave in this respect like the germ cells. 9. …”
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  5. 125
  6. 126
  7. 127
    por Gall, Joseph G.
    Publicado 1956
    “…Small particles (100 to 300 A in diameter) are seen in sections of nucleoli, the loops of the amphibian lampbrush chromosomes, and the Balbiani-ring regions of dipteran salivary-gland chromosomes. …”
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  8. 128
    “…Previous studies primarily examined the effects of atrazine exposure during metamorphosis or early developmental stages of amphibians. OBJECTIVES: We sought to identify and characterize the susceptibility during the often-overlooked developmental stage of organ morphogenesis. …”
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  9. 129
    “…Habitat loss, climate change, over-exploitation, disease and other factors have been hypothesised in the global decline of amphibian biodiversity. However, the relative importance of and synergies among different drivers are still poorly understood. …”
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  10. 130
    “…In recent years, integrative animal biologists and behavioral scientists have begun to understand the complex interactions between the immune system and the neuroendocrine system. Amphibian metamorphosis offers a unique opportunity to study dramatic hormone-driven changes in the immune system in a compressed time frame. …”
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  11. 131
    “…Dramatic declines in amphibian populations have been described all over the world since the 1980s. …”
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  12. 132
    “…Here, we use phylogenetic comparative analyses to study correlates of species richness for the largest Neotropical amphibian radiation: New World direct-developing frogs. …”
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  13. 133
  14. 134
    por Miyata, Kaori, Ose, Keiko
    Publicado 2012
    “…Taking into account the difficulties in evaluating amphibian thyroid glands, which change continuously throughout metamorphosis, histopathological examination has been shown to be a very sensitive approach.…”
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  15. 135
    por Puglis, Holly J., Boone, Michelle D.
    Publicado 2012
    “…A major cause of amphibian declines worldwide is habitat destruction or alteration. …”
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  16. 136
    por Buskirk, Josh
    Publicado 2012
    “…I estimated the relative resistance to gene flow of land cover types and barriers using F(ST) calculated from microsatellite markers in two amphibians, within an 800-km(2) area in northern Switzerland. …”
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  17. 137
    por Eskew, Evan A., Todd, Brian D.
    Publicado 2013
    “…Pathogenic fungi have substantial effects on global biodiversity, and 2 emerging pathogenic species—the chytridiomycete Batrachochytrium dendrobatidis, which causes chytridiomycosis in amphibians, and the ascomycete Geomyces destructans, which causes white-nose syndrome in hibernating bats—are implicated in the widespread decline of their vertebrate hosts. …”
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  18. 138
    “…The skin secretion of many amphibians contains an arsenal of bioactive molecules, including hormone-like peptides (HLPs) acting as defense toxins against predators, and antimicrobial peptides (AMPs) providing protection against infectious microorganisms. …”
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  19. 139
  20. 140
    “…We compiled data on amphibian life history traits from literature in an extensive database with morphological and behavioral traits, habitat preferences and movement abilities for 86 European amphibian species (50 Anuran and 36 Urodela species). …”
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