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Search Results: 1 - 10 of 401405 matches for " Troncoso M "
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EL ARTE DE LA DOMINACIóN: ARTE RUPESTRE Y PAISAJE DURANTE EL PERíODO INCAICO EN LA CUENCA SUPERIOR DEL RíO ACONCAGUA
Troncoso M.,Andrés;
Chungará (Arica) , 2004, DOI: 10.4067/S0717-73562004000200016
Abstract: considering the formal and spatial characteristics of the rock art in the upper basin of aconcagua river, central chile, i attempt to understand the inka presence in this region and, particularly, the social role played by this system of visual representation. for this purpose, the social function of rock is defined for the late intermediate period. next, considering the meaning of the material statement and the changes that affected it during inka times, i analize it as an active agent in the social process of spatial occupation and domination imposed by the tawantinsuyu in the upper basin of the aconcagua river
PROPOSICIóN DE ESTILOS PARA EL ARTE RUPESTRE DEL VALLE DE PUTAENDO, CURSO SUPERIOR DEL RíO ACONCAGUA
Troncoso M,Andrés;
Chungará (Arica) , 2003, DOI: 10.4067/S0717-73562003000200003
Abstract: this paper presents new archaeological research undertaken on the rock art of the putaendo valley. from the information gathering, we are proposing the existence of three styles of rock art associated with the late intermediate (900-1.400 a.d.), late or inca (1.400-1.536 a.d.) and historical periods (1.536 a.d. onwards).
HACIA UNA SEMIóTICA DEL ARTE RUPESTRE DE LA CUENCA SUPERIOR DEL RíO ACONCAGUA, CHILE CENTRAL
Troncoso M.,Andrés;
Chungará (Arica) , 2005, DOI: 10.4067/S0717-73562005000100003
Abstract: in this article the material world of prehispanic central chile is conceptualized as a system of specialized semiotics and a product of a particular thought process. using a semiotic characterization of a rock art from the upper basic of the aconcagua river has allowed the characterization of two rock art styles. these styles are compared with other representational systems from the same area in order to characterize a general semiotic principle for the production of the visual systems such as pottery and architecture. the results allow for a discussion of chronological associations of local rock art, with ties to the late intermediate period and late horizon
HACIA UNA SEMIóTICA DEL ARTE RUPESTRE DE LA CUENCA SUPERIOR DEL RíO ACONCAGUA, CHILE CENTRAL TOWARD A SEMIOTIC OF ROCK ART from THE UPPER BASIN OF THE ACONCAGUA RIVER, CENTRAL CHILE
Andrés Troncoso M.
Chungará (Arica) - Revista de Antropología Chilena , 2005,
Abstract: En el presente trabajo se conceptualizan las materialidades prehispánicas como conjuntos semióticos específicos producto de una forma particular de pensamiento. A partir de la caracterización semiótica del arte rupestre de la cuenca superior del río Aconcagua, que permite definir dos estilos de petroglifos, se procede a su comparación con otros sistemas de representación visual de la zona de estudio, con el fin de acercarse a la caracterización de una semiótica general que defina la producción material de estos grupos. Los resultados alcanzados permiten discutir la asociación cronológica cultural del arte rupestre local, proponiéndose su asociación a los períodos Intermedio Tardío y Tardío In this article the material world of prehispanic central Chile is conceptualized as a system of specialized semiotics and a product of a particular thought process. Using a semiotic characterization of a rock art from the upper basic of the Aconcagua River has allowed the characterization of two rock art styles. These styles are compared with other representational systems from the same area in order to characterize a general semiotic principle for the production of the visual systems such as pottery and architecture. The results allow for a discussion of chronological associations of local rock art, with ties to the Late Intermediate Period and Late Horizon
PROPOSICIóN DE ESTILOS PARA EL ARTE RUPESTRE DEL VALLE DE PUTAENDO, CURSO SUPERIOR DEL RíO ACONCAGUA STYLISTIC PROPOSITIONS FOR PUTAENDO VALLEY ROCK ART, UPPER COURSE OF THE ACONCAGUA RIVER
Andrés Troncoso M
Chungará (Arica) - Revista de Antropología Chilena , 2003,
Abstract: A partir del estudio de una serie de paneles de petroglifos existentes en el valle de Putaendo, en el río Aconcagua alto, se propone su clasificación en tres estilos de arte rupestre para la zona de estudio. Estos estilos se asociarían a los períodos Intermedio Tardío (900-1.400 d.C.), Tardío o Inca (1.400-1.536 d.C.) e Histórico (1.536 d.C. en adelante). This paper presents new archaeological research undertaken on the rock art of the Putaendo Valley. From the information gathering, we are proposing the existence of three styles of rock art associated with the Late Intermediate (900-1.400 A.D.), Late or Inca (1.400-1.536 A.D.) and Historical Periods (1.536 A.D. onwards).
EL ARTE DE LA DOMINACIóN: ARTE RUPESTRE Y PAISAJE DURANTE EL PERíODO INCAICO EN LA CUENCA SUPERIOR DEL RíO ACONCAGUA THE ART OF DOMINATION: ROCK ART AND LANDSCAPE IN INkA TIMES IN THE UPPER BASIN OF ACONCAGUA RIVER
Andrés Troncoso M.
Chungará (Arica) - Revista de Antropología Chilena , 2004,
Abstract: Considerando las características formales y espaciales del arte rupestre en la Cuenca Superior del río Aconcagua, Chile central, se aborda la comprensión de la presencia incaica en la zona de estudio y, en especial, el papel jugado por este sistema de representación visual en el proceso de dominio estatal. Para ello, se define la función social del arte rupestre durante el período Intermedio Tardío. Seguidamente, considerando el sentido de esta expresión material y los cambios que lo afectaron durante tiempos incaicos, se analiza el arte rupestre como un agente activo en los procesos sociales de ocupación espacial y dominación implantados por el Tawantinsuyu en la Cuenca Superior del río Aconcagua Considering the formal and spatial characteristics of the rock art in the upper basin of Aconcagua river, central Chile, I attempt to understand the Inka presence in this region and, particularly, the social role played by this system of visual representation. For this purpose, the social function of rock is defined for the Late Intermediate period. Next, considering the meaning of the material statement and the changes that affected it during Inka times, I analize it as an active agent in the social process of spatial occupation and domination imposed by the Tawantinsuyu in the upper basin of the Aconcagua river
Retracción a largo plazo del árbol dendrítico de neuronas piramidales córtico-faciales por lesiones periféricas del nervio facial
Urrego,Diana; Múnera,Alejandro; Troncoso,Julieta;
Biomédica , 2011,
Abstract: introduction. little evidence is available concerning the morphological modifications of motor cortex neurons associated with peripheral nerve injuries, and the consequences of those injuries on post lesion functional recovery. objective. dendritic branching of cortico-facial neurons was characterized with respect to the effects of irreversible facial nerve injury. materials and methods. twenty-four adult male rats were distributed into four groups: sham (no lesion surgery), and dendritic assessment at 1, 3 and 5 weeks post surgery. eighteen lesion animals underwent surgical transection of the mandibular and buccal branches of the facial nerve. dendritic branching was examined by contralateral primary motor cortex slices stained with the golgi-cox technique. layer v pyramidal (cortico-facial) neurons from sham and injured animals were reconstructed and their dendritic branching was compared using sholl analysis. results. animals with facial nerve lesions displayed persistent vibrissal paralysis throughout the fiveweek observation period. compared with control animal neurons, cortico-facial pyramidal neurons of surgically injured animals displayed shrinkage of their dendritic branches at statistically significant levels. this shrinkage persisted for at least five weeks after facial nerve injury. discussion. irreversible facial motoneuron axonal damage induced persistent dendritic arborization shrinkage in contralateral cortico-facial neurons. this morphological reorganization may be the physiological basis of functional sequelae observed in peripheral facial palsy patients.
Peripheral facial nerve lesion induced long-term dendritic retraction in pyramidal cortico-facial neurons Retracción a largo plazo del árbol dendrítico de neuronas piramidales córtico-faciales por lesiones periféricas del nervio facial
Diana Urrego,Alejandro Múnera,Julieta Troncoso
Biomédica , 2011,
Abstract: Introduction. Little evidence is available concerning the morphological modifications of motor cortex neurons associated with peripheral nerve injuries, and the consequences of those injuries on postlesion functional recovery. Objective. Dendritic branching of cortico-facial neurons was characterized with respect to the effects of irreversible facial nerve injury. Materials and methods. Twenty-four adult male rats were distributed into four groups: sham (no lesion surgery), and dendritic assessment at 1, 3 and 5 weeks post surgery. Eighteen lesion animals underwent surgical transection of the mandibular and buccal branches of the facial nerve. Dendritic branching was examined by contralateral primary motor cortex slices stained with the Golgi-Cox technique. Layer V pyramidal (cortico-facial) neurons from sham and injured animals were reconstructed and their dendritic branching was compared using Sholl analysis. Results. Animals with facial nerve lesions displayed persistent vibrissal paralysis throughout the fiveweek observation period. Compared with control animal neurons, cortico-facial pyramidal neurons of surgically injured animals displayed shrinkage of their dendritic branches at statistically significant levels. This shrinkage persisted for at least five weeks after facial nerve injury. Discussion. Irreversible facial motoneuron axonal damage induced persistent dendritic arborization shrinkage in contralateral cortico-facial neurons. This morphological reorganization may be the physiological basis of functional sequelae observed in peripheral facial palsy patients. Introducción. Poco se sabe sobre las modificaciones morfológicas de las neuronas de la corteza motora tras lesiones en nervios periféricos, y de la implicancia de dichos cambios en la recuperación funcional tras la lesión. Objetivo. Caracterizar en ratas el efecto de la lesión del nervio facial sobre la morfología de las neuronas piramidales de la capa V de la corteza motora primaria contralateral. Materiales y métodos. Se reconstruyeron neuronas piramidales te idas con la técnica de Golgi-Cox, de animales control (sin lesión) y animales con lesiones y sacrificados a distintos tiempos luego de la lesión. Se utilizaron cuatro grupos: sham (control), lesión 1S, lesión 3S y lesión 5S (animales con lesiones y evaluados 1, 3 y 5 semanas después de la lesión irreversible del nervio facial, respectivamente). Se evaluaron mediante el análisis de Sholl, las ramificaciones dendríticas de las células piramidales de la corteza motora contralateral a la lesión. Resultados. Los animales con lesiones
Synergism Effect between Phenolic Metabolites and Endogenous Antioxidants in Terms of Antioxidant Activity  [PDF]
María Noguer, Ana B. Cerezo, M. Luisa Moyá, Ana M. Troncoso, M. Carmen García-Parrilla
Advances in Chemical Engineering and Science (ACES) , 2014, DOI: 10.4236/aces.2014.42029
Abstract:

Polyphenolic compounds, widely distributed in plant kingdom, have been exhaustively studied for their bioactive properties specially antioxidant activity. However, they are extensively metabolized by human organism and the resulting metabolites are largely responsible for their effects. Furthermore, they may interact with the endogenous antioxidant network being this possibility scarcely studied. Plasma antioxidant network encompasses antioxidant enzymes and other substances such as uric acid. In addition, ascorbic acid is the major compound representing water soluble compartment both in foods and human body. The interaction of this vitamin with phenolic compound is largely unexplored. This work aims to study if there is a synergic effect between phenolic metabolites and main antioxidants (uric and ascorbic acid). For this purpose, the antioxidant activity was evaluated in terms of ORAC (oxygen radical absorbance capacity) and FRAP (ferricreducing antioxidant power) as these tests involved either HAT (Hydrogen Atom Transfer) or SET (Single Electron Transfer) mechanisms. Additionally, a kinetic studied was developed to test if the rate constant presented a synergic effect. Protocatechuic acid, 3,4-dihydroxyphenylacetic acid, 3,4-dihydroxyphenylpropionic acid and 3-hydroxyphenylacetic acid were selected as they were metabolites of polyphenol compounds such as anthocyanins, quercetin, neohesperidin, chlorogenic acid and hesperetin present in wines, orange and strawberries. A synergic effect was proved for the combination of ascorbic acid with 3,4-dihydroxyphenylacetic acid, both in terms of antioxidant activity and potent increase of velocity of the antioxidant reaction that took place.

Aciduria glutárica tipo I: una encefalopatía metabólica extrapiramidal Glutaric aciduria, type I
Mónica Troncoso Sch,Fernando Novoa S,Marta Colombo C,Ledia Troncoso A
Revista chilena de pediatría , 1995,
Abstract:
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