Search results for "AYA"
showing 10 items of 358 documents
Los grafitos mayas. Clasificación tipológica y aproximación a su significado
2019
Los grafitos mayas son representaciones generalmente incisas o pintadas, halladas comúnmente en el interior de los edificios, que se distribuyen en los muros, pisos y bancas de manera aleatoria, ocupando en algunas ocasiones gran parte de las superficies y superponiéndose unas a otras en muchos de los casos. No forman parte del diseño original de los edificios; una vez terminadas las estructuras, sus habitantes fueron grabando en sus muros hechos, acontecimientos o elementos del entorno que los rodeaba y que consideraban dignos de ser representados. Se trata de dibujos espontáneos realizados en la mayoría de los casos por personas sin formación artística, de representaciones simplificadas y…
Pentoxifylline and tocopherol for the treatment of osteoradionecrosis of the jaws. A systematic review
2023
Osteoradionecrosis of the jaws (ORNJ) is a severe and challenging complication of head and neck radiation therapy. Despite its aggressiveness and controversy respect to its efficacy, surgical intervention remains the main treatment modality. Nevertheless, due to advances in the understanding of ORNJ physiopathology, new treatment alternatives such as the combination of pentoxifylline with tocopherol (PENTO) have emerged. The aim of this systematic review was to assess the reported efficacy of PENTO for the treatment of ORNJ. Studies were search using Pubmed, The Cochrane Library, Scopus, and Web of Science data bases following the PRISMA guidelines. Inclusion criteria were cohort, case ser…
Characterization of the mutualistic endosymbiosis between intracellular bacteria and mealybugs (Hemiptera: Pseudococcidae)
2015
Simbiosis, del griego sym “con” y biosis “vivir”, hace referencia a la asociación estable entre individuos de dos o más especies (simbiontes) que muestran interdependencia a cualquier nivel biológico. La ubicuidad de las asociaciones simbióticas en las ramas principales del árbol de la vida evidencia la relevancia global de éstas en la evolución de la vida. Las asociaciones más estudiadas son aquellas que se establecen entre procariotas y eucariotas que, habitualmente, suponen la ampliación de las capacidades metabólicas de los últimos. En este sentido, la simbiosis con bacterias intracelulares se considera un factor clave en el éxito adaptativo de los insectos. En función de su relevancia …
Mood, Burnout, and Dispositional Optimism in Kayak Polo Players During Their Competitive Stage.
2021
© 2021. This manuscript version is made available under the CC-BY 4.0 license http://creativecommons.org/licenses/by/4.0/ This document is the Accepted Manuscript version of a Published Work that appeared in final form in Frontiers in Psychology. To access the final edited and published work see 10.3389/fpsyg.2021.667603 The main objective of performance sport is to obtain achievements at the highest level through the adequate development of the athlete. The scientific literature demonstrates the fundamental role played by the inclusion of certain psychological variables in the training plan. This study examined the psychological profile of kayak polo players through the variables of burnou…
Arbitraje para conflictos ambientales: una aproximación desde los Derechos Humanos
2020
En la confrontación entre la actividad empresarial y la protección del medio ambiente, pueden producirse daños sobre los derechos fundamentales. Desde una perspectiva de derechos humanos, el arbitraje puede desempeñar un rol importante como mecanismo que puede reducir las barreras de acceso a la justicia para las víctimas de estos conflictos y conseguir una reparación justa para ellas. El objetivo de este artículo es examinar cuáles deben ser los elementos para establecer un adecuado sistema de arbitrabilidad para la reparación del daño derivado de disputas medioambientales. Para ello, la autora se centra en las recientemente aprobadas Reglas de La Haya en Materia de Empresas y Derechos Hum…
Surveying Ancient Maya Buildings in the Forest
2017
During the last few decades, 3D scanning devices and 3D digital image generating technology has been developed to the point where they significantly reduce errors and time during data collection thus making them highly appropriate tools in the field of archaeology. With regards to surveying, terrestrial laser scanning and digital photogrammetry, they are a viable alternative to traditional methods for measuring. Nevertheless, these technologies are rarely used in projects in the Maya region, even though they offer a wide range of applications, which could be explored and utilised in this subtropical environment. This paper presents the results of digital surveying involving two Maya archaeo…
Anti-inflammatory activity of flavonoids from Cayaponia tayuya roots.
2008
Taiuiá or tayuya (Cayaponia tayuya, Cucurbitaceae) is a climbing, lignified plant with a large swollen root that has traditionally been used as an anti-inflammatory and anti-rheumatic agent in the folk medicine of Brazil, Peru, and Colombia.We have assayed the pharmacological properties of a flavonoid fraction obtained from the butanol extract of Cayaponia tayuya roots using two models of topical mouse ear oedema, paying special attention to its influence on the induction on pro-inflammatory enzymes and peptidic mediators.The in vivo experiments involved both the acute oedema induced by a single application of TPA and the subchronic inflammation brought on by repeated applications of TPA. T…
Anti-inflammatory activity of two cucurbitacins isolated from Cayaponia tayuya roots.
2004
Fractionation of an anti-inflammatory extract from Cayaponia tayuya roots yielded two active compounds, identified as 23,24-dihydrocucurbitacin B (1) and cucurbitacin R (2). Both were evaluated for their anti-inflammatory activity on several experimental models of pain and inflammation. In addition, their cytotoxicity and effects on leukotriene B 4 (LTB 4 ) formation were evaluated in rat polymorphonuclear leukocytes. Both compounds showed activity in the following models: carrageenan-induced mouse paw oedema (1, 4 mg/kg p.o., 46% inhibition at 3 h), phospholipase A 2 -induced mouse paw oedema (2, 3 mg/kg i.p., 61% inhibition at 60 min), serotonin-induced mouse paw oedema (1 and 2, 0.5 mg/k…
Acute cerebrovascular manifestation of Takayasu arteritis
2011
International audience
Dihydrocucurbitacin B, isolated from Cayaponia tayuya, reduces damage in adjuvant-induced arthritis
2005
23,24-Dihydrocucurbitacin B, from the anti-rheumatic plant Cayaponia tayuya, was tested on arthritis induced by adjuvant to corroborate the anti-inflammatory properties of this plant. Arthritis was induced in Lewis rats; the resulting arthritic rats were then treated with dihydrocucurbitacin B (1 mg/kg orally, daily, 1 week). The effect of dihydrocucurbitacin B on the synthesis, release, and activity of pro-inflammatory enzymes (elastase, cyclooxygenase-2, and nitric oxide synthase-2) as well as its effect on different mediators (tumor necrosis factor-alpha and interleukin-1beta) were determined. Dihydrocucurbitacin B modified the evolution of the clinical symptoms, reducing the swelling an…