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Search Results: 1 - 10 of 4355 matches for " Sebastian Minoli "
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La Rai e il 150° anniversario dell'Unità d'Italia / La Rai e il 150° anniversario dell'Unità d'Italia
Minoli, Giovanni
Storicamente , 2011,
Abstract:
Brief Exposure to Sensory Cues Elicits Stimulus-Nonspecific General Sensitization in an Insect
Sebastian Minoli, Isabella Kauer, Violaine Colson, Virginie Party, Michel Renou, Peter Anderson, Christophe Gadenne, Frédéric Marion-Poll, Sylvia Anton
PLOS ONE , 2012, DOI: 10.1371/journal.pone.0034141
Abstract: The effect of repeated exposure to sensory stimuli, with or without reward is well known to induce stimulus-specific modifications of behaviour, described as different forms of learning. In recent studies we showed that a brief single pre-exposure to the female-produced sex pheromone or even a predator sound can increase the behavioural and central nervous responses to this pheromone in males of the noctuid moth Spodoptera littoralis. To investigate if this increase in sensitivity might be restricted to the pheromone system or is a form of general sensitization, we studied here if a brief pre-exposure to stimuli of different modalities can reciprocally change behavioural and physiological responses to olfactory and gustatory stimuli. Olfactory and gustatory pre-exposure and subsequent behavioural tests were carried out to reveal possible intra- and cross-modal effects. Attraction to pheromone, monitored with a locomotion compensator, increased after exposure to olfactory and gustatory stimuli. Behavioural responses to sucrose, investigated using the proboscis extension reflex, increased equally after pre-exposure to olfactory and gustatory cues. Pheromone-specific neurons in the brain and antennal gustatory neurons did, however, not change their sensitivity after sucrose exposure. The observed intra- and reciprocal cross-modal effects of pre-exposure may represent a new form of stimulus-nonspecific general sensitization originating from modifications at higher sensory processing levels.
Un caso de polidactilia en Liolaemus petrophilus (Iguania: Squamata: Liolaemini)
Minoli, Ignacio,Feltrin, Natalia,ávila, Luciano Javier
Cuadernos de Herpetología , 2009,
Abstract: Se encontró un individuo con un dígito adicional. Es un ejemplar juvenil macho, con un LHC de 55,61 mm. La extremidad anterior izquierda presenta 6 dígitos (Fig. 1). Las otras extremidades son completamente normales. El análisis radiográfico sobre este ejemplar evidencia que la polidactilia aparece por una ramificación del metacarpiano I (Fig. 2). A partir de esta ramificación las falanges son completamente independientes, de manera que el dedo I está formado por dos dígitos desiguales en longitud y grosor (Fig. 2). El ejemplar fue depositado en la colección herpetológica del Museo de la Plata, La Plata, Buenos Aires, Argentina (MLP.S 2604).
Daily rhythm of aggregation in the haematophagous bug Triatoma infestans (Heteroptera: Reduviidae)
Minoli, S A;Baraballe, S;Lorenzo Figueiras, A N;
Memórias do Instituto Oswaldo Cruz , 2007, DOI: 10.1590/S0074-02762007005000033
Abstract: triatomine bugs show a temporal modulation of many activities. here, we analyse the daily modulation of the aggregation behaviour of triatoma infestans larvae and its chronobiological basis. in the laboratory, groups of six bugs were released over an experimental arena during six consecutive days, where their aggregation behaviour was quantified every hour. when submitted to a 12/12 h photoperiod (l/d), the larvae of t. infestans exhibited a cyclic pattern of aggregation with a 24 h period, evincing the existence of a daily rhythm of aggregation in this species. bugs exhibited the maximum aggregation tendency at the end of the scotophase (7:00 h), moment in which they naturally search for refuges. the minimum aggregation (i.e. maximal dispersion) was observed during the last part of the photophase and beginning of the scotophase (15:00 to 1:00 h). this cyclic pattern disappeared when constant conditions of illumination (l/l) or darkness (d/d) were imposed to the bugs, suggesting the absence of an endogenous circadian control of this behaviour. insects submitted to l/l and d/d photoperiods presented lower global levels of aggregation than those submitted to l/d conditions. the lack of an endogenous control and the relevance of light cycles as a synchronization signal are discussed as the temporal modulation of this behaviour might play an important role in the nocturnal habits of this species.
Reduciendo distancia en proyectos de Desarrollo de Software Global ágiles con técnicas de Ingeniería de Requisitos
Mariano Minoli,Valeria de Castro,Javier Garzás
Revista Espa?ola de Innovación, Calidad e Ingeniería del Software , 2010,
Abstract: La tendencia a incluir agilidad en los métodos de desarrollo de software ha sido un tema recurrente durante los últimos a os en ámbitos académicos y empresariales. Los equipos de desarrollo que trabajan de forma distribuida (conocidos como equipos GSD, Global Software Development) no han sido una excepción. Múltiples propuestas abogan por la adopción de técnicas ágiles para el desarrollo y la administración de estos equipos de desarrollo. Aunque a primera vista esta evolución hacia lo ágil parece natural, en realidad surgen múltiples interrogantes relacionados a combinar agilidad con el factor más complicado de tratar en equipos distribuidos: la distancia. Desde nuestro punto de vista, técnicas existentes de ingeniería de software pueden ser útiles para abordar esta problemática. En este artículo presentamos el uso de técnicas de ingeniería de requisitos como herramienta para estrechar la brecha que se produce al mezclar agilidad y distancia.
Time-Dependent Ferrofluid Dynamics in Symmetry Breaking Transverse  [PDF]
Sebastian Altmeyer
Open Journal of Fluid Dynamics (OJFD) , 2013, DOI: 10.4236/ojfd.2013.32015
Abstract: We investigate the Taylor-Couette flow of a rotating ferrofluid under the influence of symmetry breaking transverse magnetic field in counter-rotating small-aspect-ratio setup. We find only changing the magnetic field strength can drive the dynamics from time-periodic limit-cycle solution to time-independent steady fixed-point solution and vice versa. Thereby both solutions exist in symmetry related offering mode-two symmetry with left-or right-winding characteristics due to finite transverse magnetic field. Furthermore the time-periodic limit-cycle solutions offer alternately stroboscoping both helical left-and right-winding contributions of mode-two symmetry. The Navier-Stokes equations are solved with a second order time splitting method combined with spatial discretization of hybrid finite difference and Galerkin method.
Structure of Relatively Accelerating Universe  [PDF]
Aloysius Sebastian
International Journal of Astronomy and Astrophysics (IJAA) , 2014, DOI: 10.4236/ijaa.2014.41015
Abstract:

This article is about the structure of expanding universe. Here I am trying to create a structural model of universe according to my thoughts. Studies showthat universe is accelerating its rate of expansion. Here I am trying to get some conclusions according to my thoughts. In my opinion, our universe is under a gravitational frame with all the matters in it. In this gravitational frame of universe we can consider our universe as a closed system and the empty space outside the frame as an open system. There are two possibilities we can find. One is relative motion of the objects inside the frame. By this way we can feel the universe is accelerating its expansion, but it is not. Another one is the vacuum energy absorption and negative pressure inside the frame. According to this thought, we can say that universe is accelerating and it can continue its motion at present conditions on it, even the force created by the big bang is decreasing. The other point is that, once the absorbed vacuum can create a negative pressure inside the frame, there is no need for the concept of dark energy in our universe [1]. According to this model, negative pressure inside the frame will be created by the absorbed vacuum from the space. So the

Estudio comparativo del melanismo en lagartijas del grupo Liolaemus fitzingerii (Liolaemini: Liolaemus)
Escudero,Paula Cecilia; Minoli,Ignacio; Frutos,Nicolás; Avila,Luciano Javier; Morando,Mariana;
Cuadernos de herpetolog?-a , 2012,
Abstract: color patterns and melanism have been focus of evolutionary studies in a wide variety of taxa, including lizards, and are often associated with certain ecological attributes. however, within the genus liolaemus, only some particular aspects of melanism have been studied in a few species of the l. fitzingerii group. populations of these species show different degrees of melanism with respect to both the intensity and location of black pigment, that in some cases have been used as diagnostic characters in different species of this group. the aim of this study was to assess the degree of polymorphism in ventral body and dorsal head melanism in patagonian lizards from the five haploclades of the l. fitzingerii group (which includes all described species, except l. dumerili and l. camarones), to determine patterns of geographic variation and evaluate their usefulness as diagnostic characters. our results show a high degree of polymorphism in both, ventral body and dorsal head melanism in the five haploclades, and in the different geographic regions analyzed. in this group, the melanic characters should be used with caution and in combination with others for diagnostic characters for species delimitation and diagnosis.
Estudio comparativo del melanismo en lagartijas del grupo Liolaemus fitzingerii (Liolaemini: Liolaemus)
Escudero, Paula Cecilia,Minoli, Ignacio,Frutos, Nicolás,ávila, Luciano Javier
Cuadernos de Herpetología , 2012,
Abstract: Los patrones de coloración y melanismo, han sido foco de estudios evolutivos en una amplia variedad de grupos taxonómicos, incluidas las lagartijas, y generalmente se los encuentra asociados a ciertos aspectos ecológicos. Sin embargo, dentro del género Liolaemus solo se han estudiado algunos aspectos particulares del melanismo en pocas especies del grupo fitzingerii. Las poblaciones de estas especies presentan diferentes grados de melanismo en cuanto a intensidad y a ubicación, y esto en algunos casos se ha utilizado como carácter diagnóstico en diferentes especies de este grupo. El objetivo de este estudio fue evaluar el grado de polimorfismo en el melanismo ventral corporal y dorsal de la cabeza en lagartijas patagónicas pertenecientes a los cinco haploclados del grupo fitzingerii (que incluyen todas las especies descriptas), determinar la variación geográfica de los mismos y evaluar su utilidad como carácter diagnóstico. Se observó un alto grado de polimorfismo en el melanismo ventral corporal y dorsal de la cabeza en los cinco haploclados y en las diferentes zonas geográficas analizadas. En este grupo, lo caracteres melánicos deberían ser utilizados con precaución y en conjunto con otros, como caracteres diagnósticos para diferenciar especies. Color patterns and melanism have been focus of evolutionary studies in a wide variety of taxa, including lizards, and are often associated with certain ecological attributes. However, within the genus Liolaemus, only some particular aspects of melanism have been studied in a few species of the L. fitzingerii group. Populations of these species show different degrees of melanism with respect to both the intensity and location of black pigment, that in some cases have been used as diagnostic characters in different species of this group. The aim of this study was to assess the degree of polymorphism in ventral body and dorsal head melanism in Patagonian lizards from the five haploclades of the L. fitzingerii group (which includes all described species, except L. dumerili and L. camarones), to determine patterns of geographic variation and evaluate their usefulness as diagnostic characters. Our results show a high degree of polymorphism in both, ventral body and dorsal head melanism in the five haploclades, and in the different geographic regions analyzed. In this group, the melanic characters should be used with caution and in combination with others for diagnostic characters for species delimitation and diagnosis.
The Post-Transcriptional mRNA Editing Analysis of cox3 Mitochondrial Gene in Fern Asplenium nidus Reveals Important Features  [PDF]
Sebastian Panarese, Guglielmo Rainaldi
American Journal of Plant Sciences (AJPS) , 2011, DOI: 10.4236/ajps.2011.24063
Abstract: In the mitochondria and chloroplasts of flowering plants (angiosperms), transcripts of protein-coding genes are altered after synthesis so that their final primary nucleotide sequence differs from that of the corresponding DNA sequence. This posttranscriptional mRNA editing consists almost exclusively of C-to-U substitutions (direct) and less frequently of U-to-C substitution (reverse). Editing occurs predominantly within coding regions, mostly at isolated C residues, and usually at first or second positions of codons, thereby almost always changing the amino acid from that specified by the unedited codon. Editing may also create initiation and termination codons. The effect of C-to-U RNA editing in plants is to make proteins encoded by plant organelles more similar in sequence to their non plant homologs, then specific C-to- U editing events are essential for the production of functional plant mitochondrial proteins. Our attention has been devoted to the study of the mRNA editing in cox3 mitochondrial gene of fern Asplenium nidus. This study reveals the extreme importance of both C-to-U and U-to-C substitutions for protein expression.
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