Browsing by Subject "Metamorphosis"
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- PublicationOpen AccessBestiarios de resistencia: narradores más que humanos en narrativas argentinas recientes.(Universidad de Murcia, Servicio de Publicaciones., 2026) Barbero, Ludmila; Sin departamento asociadoProponemos analizar El niño pez (2004) de Lucía Puenzo y Cat Power. La toma de la Tierra (2017) de Cecilia Palmeiro, como novelas que presentan narradores más-que-humanos, y plantean una mirada disruptiva del límite entre las diferentes esferas de lo vivo. Se considerarán los procedimientos narratológicos no-naturales en ambas ficciones, como así también la presencia de seres metamórficos, que, por su misma condición, hacen estallar la rigidez de las taxonomías. Nos centraremos, por ultimo, en las escenas que dan comienzo a ambos textos, y que consituyen “escenas de denominación” (Dünne: 2025) subvertidas, en las que los animales “negocian” o deciden su nombre propio.
- PublicationOpen AccessEffects of the isoflavone daidzein in Senegalese sole, Solea senegalensis: Modulation of the oestrogen receptor-β, apoptosis and enzymatic signalling pathways(Universidad de Murcia. Departamento de Biología Celular e Histología, 2019) Sarasquete, Carmen; Úbeda Manzanaro, María; Ortiz Delgado, Juan B.Phytochemicals are widely present in the aquatic environment and they are derived from many anthropogenic activities. The isoflavone daidzein is a natural compound that is found in the soya products used as habitual constituents of aquafeeds. Nevertheless, this isoflavone possesses oestrogenic and apoptotic properties. The present study determined the effects of daidzein (at 20 mg/L) during the first month and a half of life (from 7 to 44 days post-hatching -dph-) of the flatfish Senegalese sole, Solea senegalensis, focusing at the metamorphosis. We have analysed different gene expression levels and immunohistochemical protein patterns implicated in some oestrogenic, apoptotic and enzymatic pathways. In general, the oestrogen receptor (ERβ) and stimulating apoptosis death receptor factor (Fas) transcript levels showed similar baseline patterns and transcriptional responses induced by daidzein. Both ERβ and Fas were up-regulated by this isoflavone at the pre-metamorphosis and metamorphosis, and they were down-regulated in post-metamorphosed stages. The expression pattern of the apoptotic effector caspase (Casp6) was exclusively up-regulated at the premetamorphic phase. The Birc5 transcripts (i.e. antiapoptosis, Survivin) were down-regulated by daidzein during certain metamorphic and post-metamorphosed stages. Besides, daidzein showed an up-regulating effect on both enzymatic complexes, the haemoprotein CYP1A and the acetylcholinesterase (AChE), except for a temporary AChE down-regulation in some postmetamorphosed stages. Immunostaining analysis only showed increased CYP1A signals in the liver of daidzein exposed fish. Overall, a majority of the transcriptional oestrogenic and apoptotic imbalances could be gradually and/or temporarily stabilised. Most controls and exposed larvae (70-80%) developed and grew following normal ontogenetic developmental patterns.
- PublicationOpen AccessMundo imaginal, espaço edénico e metamorfose em Ibn ʿArabī e Maria Gabriela Llansol(Universidad de Murcia, Servicio de Publicaciones., 2019) Borges, PauloProcuramos apresentar as noções de «mundo imaginal» e «espaço edénico» no filósofo e místico murciano e na escritora portuguesa e mostrar as suas relações como via para compreender a experiência da metamorfose da vida enquanto alternativa ao princípio de identidade prevalecente na tradição filosófica ocidental.
- PublicationOpen AccessO tempo do sonho : poesia cósmica e metamorfose nas culturas indígenas(Universidad de Murcia, Servicio de Publicaciones., 2023) Borges, PauloWe present the conception, which is a hallmark of various indigenous cultures, especially the Amerindian and Australian ones, of an original Dreamtime, in which everything is possible because all forms of life flow, in the passage from the invisible to the visible, in a constant autopoietic metamorphosis. This Dreamtime, synonymous with the inexhaustible virtuality of the possible, is hidden or forgotten in the triumph of conceptual and categorical thinking, dominant in the West since the Platonic-Aristotelian and epistemic drift of philosophy, which apparently solidifies the world by enclosing the chaosmic flow in the classification of beings into species, genera and individuals, just as in the laws of apparent causality. The Dreamtime can, however, be experienced at any moment through mythicalritual performance, poetic song and the differentiated states of consciousness they induce, as in the intermediation of the shaman who, devoid of identity, moves freely between the multiple perspectives that configure the processes of the multiple beings and worlds.
- PublicationOpen AccessStimulation of regenerative blastema formation in lizards as a model to analyze limb regeneration in amniotes(Universidad de Murcia. Departamento de Biología Celular e Histología, 2019) Alibardi, LorenzoThe hypothesis here presented tries to explain why organ regeneration is present in fish and amphibians (anamniotes) but is absent in reptiles, birds and mammals (amniotes). Anamniotes possess complex life cycles including larvae and metamorphosis stages, the latter representing a physiological form of organ destruction and regeneration coded in their genome that can be reactivated in adults in the form of regeneration. Part of the genome for larvae and metamorphosis phases was likely lost in amniotes with the evolution of direct development, the potentiation of the immune system and the increase in complexity of the nervous system. These events consequently determined incapability for organ regeneration in extant amniotes with the exception of the lizard tail. This likely derives from the evolution of a mechanism of immunosuppression that allows the regeneration of the tail although the complete morphogenetic plane of tail embryogenesis is lost. The lizard model of imperfect but outstanding organ regeneration indicates the possibility to improve organ regeneration also in other amniotes. In fact, the induction of a blastema in the amputated lizard limb has stimulated the formation of short limbs containing cartilaginous bones of the femur, tibia and fibula, and these experiments foster some hope for future attempts to induce limb and digit regeneration also in mammals.
- PublicationOpen AccessTema y léxico de las metamorfosis en los epigramas de la Antología Griega .(Universidad de Murcia, Servicio de Publicaciones, 2020) Plaza Salguero, SandraLas metamorfosis de los diferentes personajes mitológicos forman parte indispensable del acervo cultural de los griegos antiguos desde los primeros inicios de su literatura. Este trabajo pretende ofrecer un análisis sobre la temática y terminología, empleada por los epigramatistas helenísticos e imperiales para describir los procesos de metamorfosis, bien de seres mortales o divinos, en las composiciones de la Antología Griega. Este estudio permite replantearnos la riqueza y diversidad de formas léxicas y construcciones sintácticas, reducidas por el testimonio de los lexicógrafos, y a hallar indicios sobre la existencia de una lexicografía propia de estos contextos literarios.