723 research outputs found
Doublecortin in the fish visual system, a specific protein of maturing neurons Biology-basel
Doublecortin (DCX) is an essential protein in the development of the central nervous system and in lamination of the mammalian cortex. It is known that the expression of DCX is restricted to newborn neurons. The visual system of teleost fish has been postulated as an ideal model since it continuously grows throughout the animal’s life. Here, we report a comparative expression analysis of DCX between two teleost fish species as well as a bioinformatic analysis with other animal groups. Our results demonstrate that DCX is very useful for identifying new neurons in the visual systems of Astatotilapia burtoni, but is absent in Danio rerio.This research was funded by Junta de Castilla y León, ConsejerÃa de Sanidad. Centro en Red de Terapia Celular de la Junta de Castilla y León, grant number GRS2167/1/2020. L. DeOliveira-Mello was supported by a grant from The University of Salamanca and Santander Bank during her predoctoral period
Fluidos magnetorreológicos: sÃntesis, propiedades y aplicaciones
The magnetorheological fluids have the ability to modify their viscosity quickly by subjecting it to a magnetic field, a quality that classifies them in the category of intelligent materials. Such fluids include three main components; the base fluid that is generally mineral or synthetic oil, magnetizable particles which are dispersed in the base fluid and the additives or stabilizers that prevent agglomeration and sedimentation of the particles, as well as the degradation induced by the carrier medium. The main challenge of these fluids is to maintain the rheological response to the magnetic field, as well as avoid the chemical and microstructural instability of the magnetoreological fluids. In the present investigation an exhaustive bibliographic review was carried out to understand the main aspects of these types of materials, their properties as well as the main applications in the different branches of industry and medicine. The most recent contributions focused on the chemical stability of magnetic particles through the application of surface coatings are discussed.Los fluidos magnetorreológicos tienen la capacidad de modificar su viscosidad rápidamente al someterlos a un campo magnético, cualidad que los clasifica en la categorÃa de los materiales inteligentes. Dichos fluidos incluyen tres componentes principales; el fluido base que generalmente es aceite mineral o sintético, partÃculas magnetizables las cuales se dispersan en el fluido base y los aditivos o estabilizadores que evitan la aglomeración y sedimentación de las partÃculas, asà como la degradación inducida por el medio portador. El reto principal de estos fluidos es mantener la respuesta reológica al campo magnético, asà como evitar la inestabilidad quÃmica y microestructural del fluido magnetorreológico. En la presente investigación se realizó una revisión bibliográfica exhaustiva para comprender los aspectos principales de estos tipos de materiales, sus propiedades asà como las principales aplicaciones en las distintas ramas de la industria y la medicina. Se discuten las aportaciones más recientes enfocadas a la estabilidad quÃmica de las partÃculas magnéticas mediante la aplicación de recubrimientos superficiales
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