Selection for acrolein tolerance in Drosophila melanogaster

International audienc

Genetic architecture of tolerance to acrolein in Drosophila melanogaster

International audienc

Mechanisms of resistance to acrolein in Drosophila melanogaster

Summary- The mechanisms of acrolein resistance developed by 2 D. melanogaster lines have been studied. The results suggest that there are 2 overlapping mechanisms. One of them is a reduction of breathing requirements, which reduces the amount of acrolein entering the flies, and the other is an increase in aldehyde dehydrogenase activity; probably, the first is the more important. acrolein- resistance mechanisms- toxic tolerance- Drosophila melanogaster Résumé- Mécanismes de résistance à l’acroléine chez Drosophila melanogaster. Dans ce travail on a étudié les mécanismes de résistance à l’acroléine qu’ont développés 2 souches de D. melanogaster. Les résultats suggèrent l’existence de 2 mécanismes superposés. L’un des 2 se présente comme une réduction des exigences respiratoires, ce qui réduit l’entrée d’acroléine dans l’organisme. L’autre montre une élévation de l’activité aldéhyde deshydrogenase. Le premier mécanisme est probablement le plus important. acroléine- mécanismes de résistance- tolérance aux toxiques- Drosophila melanogaste

Z_3 Dark Matter and Two-Loop Neutrino Mass

Dark matter is usually distinguished from ordinary matter by an odd-even parity, i.e. the discrete symmetry Z_2. The new idea of Z_3 dark matter is proposed with a special application to generating radiative Majorana neutrino masses in two-loop order.Comment: expanded (9 pages, 2 figures), 2 references adde

Probing the Majorana nature of TeV-scale radiative seesaw models at collider experiments

A general feature of TeV-scale radiative seesaw models, in which tiny neutrino masses are generated via loop corrections, is an extended scalar (Higgs) sector. Another feature is the Majorana nature; e.g., introducing right-handed neutrinos with TeV-scale Majorana masses under the discrete symmetry, or otherwise introducing some lepton number violating interactions in the scalar sector. We study phenomenological aspects of these models at collider experiments. We find that, while properties of the extended Higgs sector of these models can be explored to some extent, the Majorana nature of the models can also be tested directly at the International Linear Collider via the electron-positron and electron-electron collision experiments.Comment: 19 pages, 7 figures, version published in Physics Letters

Leptogenesis at the Electroweak Scale

In this note we propose a model of leptogenesis in which the scale for the mass of the necessary heavy neutral lepton is similar to the scale of electroweak symmetry breaking.Comment: 10 pages, 3 figure

El desenvolupament urbanístic dels pobles del Maresme

Com a poble amfitrió la ponència va anar a càrrec de Francesc Caballé, que va fer una ponència basada en el seu estudi de recerca documental i anàlisi parcel·lària del nucli històric de Vilassar de Mar realitzat l’any 2004

VI Edició dels premis Joan Monjo a la recerca jove

Els premis pretenen ser una eina per fomentar l’emprenedoria i la recerca, valorar la feina dels alumnes dels centres educatius del poble i dignificar la figura dels instituts com a centres d’irradiació cultural dins del nostre terme

Entanglement and quantum phase transition in the one-dimensional anisotropic XY model

In this paper the entanglement and quantum phase transition of the anisotropic s=1/2 XY model are studied by using the quantum renormalization group method. By solving the renormalization equations, we get the trivial fixed point and the untrivial fixed point which correspond to the phase of the system and the critical point, respectively. Then the concurrence between two blocks are calculated and it is found that when the number of the iterations of the renormalziation trends infinity, the concurrence develops two staturated values which are associated with two different phases, i.e., Ising-like and spin-fluid phases. We also investigate the first derivative of the concurrence, and find that there exists non-analytic behaviors at the quantum critical point, which directly associate with the divergence of the correlation length. Further insight, the scaling behaviors of the system are analyzed, it is shown that how the maximum value of the first derivative of the concurrence reaches the infinity and how the critical point is touched as the size of the system becomes large.Comment: 10 pages, 5 figure