Search results for "TALIS"
showing 10 items of 997 documents
Are dendrites in Drosophila homologous to vertebrate dendrites?
2005
AbstractDendrites represent arborising neurites in both vertebrates and invertebrates. However, in vertebrates, dendrites develop on neuronal cell bodies, whereas in higher invertebrates, they arise from very different neuronal structures, the primary neurites, which also form the axons. Is this anatomical difference paralleled by principal developmental and/or physiological differences? We address this question by focussing on one cellular model, motorneurons of Drosophila and characterise the compartmentalisation of these cells. We find that motorneuronal dendrites of Drosophila share with typical vertebrate dendrites that they lack presynaptic but harbour postsynaptic proteins, display c…
Producción catalítica de gamma-valerolactona a partir de sustratos procedentes de biomasa
2022
La presente tesis doctoral presenta el desarrollo de diferentes tipos de catalizadores para la conversión de diferentes compuestos derivados de la biomasa en γ-valerolactona, un compuesto de alto valor añadido. En primer lugar se llevó a cabo el estudio de la producción de γ-valerolactona a partir de ácido levulínico, uno de los compuestos más fácilmente aislables de la biomasa y con elevado potencial de transformación. Esta reacción requiere un paso de hidrogenación y otro de deshidratación. Este proceso ha sido estudiado utilizando diferentes fuentes de hidrógeno y con catalizadores metálicos para llevarla a cabo. Se sintetizaron diferentes tipos de catalizadores basados en Ni sobre sopor…
Understanding the influence of context in technology integration from teacher educators’ perspective
2021
The perspective of teachers is important for advancing the use of technology in classrooms. A considerable number of research studies have explained context in ways that have narrowed the understanding of its impact on successful technology integration. This study employs the Technological Pedagogical and Content Knowledge (TPACK) model as a lens in understanding factors influencing teachers’ integration of technology in classrooms. Data were collected using focused interviews of 19 teacher educators of three colleges of education from the southern part of Nigeria. The results reveal that among the level contexts, the meso level presented the most challenges to teachers’ efforts at integrat…
Ode laica per Chibok e Leah
2019
The volume contains two short poems by Nigerian Nobel Laureate Wole Soyinka -- "No, He Said!", dedicated to Nelson Mandela, from the Author's 1988 well-known collection "Mandela's Earth and Other Poems" and the recent "Mandela Comes to Leah", written purposely for this volume -- and the Author's 2019 long epic poem "A Humanist Ode to Chibok, Leah" denouncing all forms of fundamentalism and fanaticism as opposed to secular humanism. Soyinka pays tribute to the girls abducted in Chibok and to 15 year-old Leah Sharibu, one of the 108 girls abducted in 2018 from Dapchi, comparing her firm refusal to renounce her faith to Nelson Mandela's refusal to compromise his moral stance on Apartheid while…
Nietzsche y el mejoramiento humano. Reflexiones en torno a la noción de vida
2017
El presente trabajo expone el diálogo entre nietzsche y la escuela darwinista, destacando el contraste entre dos nociones de «vida» opuestas: vida como lucha por la supervivencia o vida como voluntad de poder. En oposición a la selección natural, que según nietzsche no favorece a los fuertes y poderosos sino a lo mediano y al «gran número», el filósofo alemán idea un proyecto de cría (Züchtung), una formación tanto fisiológica como moral que aspira a una auténtica elevación del ser humano, mediante la superación de las interpretaciones nihilistas y la transvaloración de los valores desde una perspectiva vitalista.
Which Language Does the Subaltern Speak? Leskov, Verga, and Internal Orientalism
2021
During the last few years, Edward Said’s conceptual frame has been used in peculiar ways in relation to both Italy and Russia. The differences are self-evident, but a look at the similarities can be useful as well: if in the Italian case, from a political point of view, a discussion of internal colonisation would be meaningless, from a cultural one the situation changes: the picture of an essentially backwards, ‘Oriental’ South is mainly the product of Southern intellectuals working in exile in Northern Italy after the failed revolution of 1848. The parallel is thus a working one for what concerns the ‘Westernisers’ party; it could be useful to extend it to the ‘Slavophile’ (in the broadest…
Comparative Genomics of Blattabacterium cuenoti: The Frozen Legacy of an Ancient Endosymbiont Genome
2013
Many insect species have established long-term symbiotic relationships with intracellular bacteria. Symbiosis with bacteria has provided insects with novel ecological capabilities, which have allowed them colonize previously unexplored niches. Despite its importance to the understanding of the emergence of biological complexity, the evolution of symbiotic relationships remains hitherto a mystery in evolutionary biology. In this study, we contribute to the investigation of the evolutionary leaps enabled by mutualistic symbioses by sequencing the genome of Blattabacterium cuenoti, primary endosymbiont of the omnivorous cockroach Blatta orientalis, and one of the most ancient symbiotic associa…