3,774 research outputs found
Caceres-Escobar et al., People and Nature (2019) data
No full textFile containing aggregated responses for the eSurvey (total = 13 respondents). The data is presented following the requirements of the Human Research Ethics Committee (HREC) of The University of Queensland (Approval number: 2016001001)
MAP-1B/TAU functional redundancy during laminin-enhanced axonal growth
No full textWhen cultured cerebellar macroneurons develop attached to a laminin-containing substrate or after the acute addition of laminin to the tissue culture medium, there is an acceleration in the rate and extent of axonal elongation. Furthermore, laminin is capable of inducing axonal formation and microtubule stabilization in neurons arrested at stage II of neuritic development by tau suppression (Caceres and Kosik, 1990; Caceres et al., 1991). Laminin-enhanced or induced axonal extension is paralleled by a selective and dramatic incorporation of phosphorylated MAP-1b into axonal microtubules. Axonal formation in neurons growing in the presence of laminin is prevented by treatment of the cultures with a mixture of MAP-1b and tau antisense oligonucleotides, but not by the single suppression of any one of these MAPs. However, suppression of MAP-1b, but not of tau, greatly reduces the increase in the rate and extent of axonal elongation induced by laminin. No such effects are elicited by MAP-1b antisense oligonucleotides in neurons growing in the absence of laminin, e.g. polylysine alone, where most of the MAP-1b present in the cells is dephosphorylated and not associated with the cytoskeleton. Taken collectively, these data suggest that, with regard to axonal elongation, MAP-1b and tau can be functionally substituted, and that extracellular matrix molecules, such as laminin, affect axonal extension by promoting the in vivo utilization of MAP-1b
Wave disturbance behind low crested structures:diffraction and overtopping
No full textIn recent years the hydraulic performance of low-crested structures has been widely studied both theoretically and through experimental analyses, but only a few studies have been focused on the combined diffraction-overtopping effects on wave transmission and induced wave currents.In this paper hydraulic model tests conducted at the 3D wave basin of Delft University of Technology (Caceres et al., 2008) were used to obtain and discuss two simple methods for predicting the wave height at the lee of a single detached breakwater of finite length and the related current regime. For the first time diffraction effects are expressly accounted for. The agreement with experimental data is encouraging. The main objective of the paper is to aid engineers in the first stage of the design process, when using a mathematical model could be unnecessarily excessive. (C) 2009 Elsevier B.V. All rights reserved
Thibaud Paul et Caceres Benigno - Regards neufs sur les budgets familiaux. Initiation aux mécanismes économiques
No full textL C. Thibaud Paul et Caceres Benigno - Regards neufs sur les budgets familiaux. Initiation aux mécanismes économiques. In: Population, 14ᵉ année, n°4, 1959. pp. 777-778
Massive fast rotating highly magnetized White Dwarfs: theory and astrophysical applications
No full textIn this thesis the topic of magnetic white dwarfs is addressed. In the first part are considered the instability boundaries that allow us to ensure that white dwarfs with arbitrarily large magnetic fields cannot exist in nature. We show the impossibility of the existence of these objects considering different instabilities due to inverse beta-decay, pycnonuclear reactions, general relativity or restrictions coming out from the viral theorem. In this way we discard the existence of hypothetical ultra magnetic white dwarfs (with magnetic fields as large as 10^8 G), which have been recently proposed as an explanation for some peculiar super luminous type Ia supernovae. In the second part of this thesis we consider the possibility that magnetic fast rotating white dwarfs could behave like rotationally powered pulsars. We show that under certain physical conditions this pulsar-like behaviour is possible and we show some examples of applications of this hypothesis to explain the well known Anomalous X-ray pulsars (AXPs) and Soft Gamma-ray repeaters(SGRs). This White Dwarf hypothesis is an alternative to the current magnetar model that intends to explain AXPs/SGRs. Finally, in the third part of this work we consider again AXPs and SGRs and we consider the possibility that some of them could be modelled as traditional rotationally powered pulsars and not as ultra magnetic neutron stars (magnetar model). We show that using realistic neutron star configurations the number of potentially rotationally powered pulsars is increased with respect to the case when only fiducial parameters for the mass, radius and moment of inertia are considered. We consider also other observational features of these objects in the rotationally powered pulsar model such as glitches, outbursts or emission in radio wavelengths. Finally, general conclusions and proposals for future work are presented
Acceder : Economic Empowerment in the Roma Community of Caceres, Spain
No full textiv, 31 p.The author provides a historical context of the Roma community in Spain followed by a close look of the Acceder program in which he worked during study abroad. The author reflects on the Acceder program and its positive impact on the Roma community of Caceres and the rest of Spain as an effective tool in breaking the cycle of poverty that exists with the Roma. He then transitions to a more theoretical modern framing of Roma identity and activism both by Roma and non-Roma academics and activists as transnational/EU and national-within the nation state and how this activism is responsible for instituting social change across the EU and in Spain in the form of social well-being programs launched of which Acceder is a part of. In conclusion, the author follows up on the personal experiences at the foundation by offering some recommendations for improved performance and policies
Diseño del sistema de gestión de calidad basado en la ntc iso 9001: 2015 en la empresa smartrack group s.a.s de la ciudad de Cúcuta
No full textEn la actualidad las empresas expresan comprender la necesidad e importancia del enfoque basado en procesos, pero no todas actúan al respecto, lo que significa que es insuficiente la conciencia de la necesidad del cambio hacia un modelo de gestión basado en resultados de valor.
Las empresas colombianas en su afán de sostenerse han tomado en cuenta la importancia de diseñar e implementar un sistema de gestión que le garantice ser una compañía competitiva, comprometida a brindar un mejor servicio, el bienestar de sus trabajadores y el cumplimiento de la legislación en lo que respecta a las normas; por tanto, la realización de un diseño y su posterior implementación se hace indispensable
In vitro activity of five medicinal plants commonly used in Guatemala and some of their fractions against the Epimastigote and Trypomastigote form of Trypanosoma cruzi.
No full textKeggin heteropolycompounds as catalysts for liquid-phase oxidation of sulfides to sulfoxides/sulfones by hydrogen peroxide
No full textH4PMo11VO40, H5PMo10V2O40 and H9PMo6V6O40 acids and an acidic pyridinium salt of H4PMo11VO40 were
synthesized. They were characterized by FT-IR and the variations of their acid properties were determined by
titration with n-butylamine. They proved to be highly active and selective catalysts for the hydrogen peroxide
oxidation of methyl phenyl sulfide to the corresponding sulfoxide or sulfone. The conversion and selectivity
results may be explained in terms of the co-existence of acidic and oxidative properties in the catalysts. On the
other hand, a convenient catalytic homogeneous procedure has been found to oxidize different sulfides to
sulfoxides or sulfones, with 35% aqueous H2O2, using (PyH)H3PMo11VO40 as catalyst. The oxidation reaction is
carried out at room temperature for sulfoxides or 40 °C for sulfones and requires a short time. The sulfoxides
or sulfones were obtained with excellent yields by controlling the amount of H2O2
Freezing stallion semen with the new Caceres extender improves post thaw sperm quality and diminishes stallion-to-stallion variability
No full textEjaculates from 7 stallions were split and simultaneously frozen in three different extenders, INRA 96 egg yolk glycerol, Ghent and the newly developed extender Caceres. After thawing, samples were evaluated for motility (CASA system) sperm membrane integrity and early membrane changes (YoPro-1/Eth staining), acrosome integrity (FICT-PNA), and mitochondrial membrane potential (JC-1) (flow cytometry). Samples frozen in Caceres extender consistently showed the best results in post-thaw motility (increases ranging from 11 to 17%, p < 0.05) and velocity (p < 0.05), membrane integrity (increases ranging from 11 to 14%, p < 0.05) and mitochondrial membrane potential (p < 0.05). It is concluded that this new extender should be included in a freezeability test to determine the best extender for each individual. (C) 2011 Elsevier B.V. All rights reserved
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