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Search Results: 1 - 10 of 122016 matches for " Rodrigo; Tapia O "
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Rodrigo Hidalgo: La vivienda social en Chile y la construcción del espacio urbano en el Santiago del siglo XX
Rodrigo Tapia
EURE (Santiago) , 2005,
Abstract:
áCIDOS GRASOS OMEGA-3 (EPA Y DHA) Y SU APLICACIóN EN DIVERSAS SITUACIONES CLíNICAS
Valenzuela B,Rodrigo; Tapia O,Gladys; González E,Marcela; Valenzuela B,Alfonso;
Revista chilena de nutrición , 2011, DOI: 10.4067/S0717-75182011000300011
Abstract: omega-3 long-chain polyunsaturated fatty acids (ω-3 lcpufa) eicosapentaenoic acid (epa) and docosahexae-noic acid (dha) are found in significant amounts in fatty fish (tuna fish, mackerel and salmon) and especially in the oil obtained from these species, which is actually utilized as a nutritional supplement (nutraceutical). after ingestion, both epa and dha are rapidly incorporated into cellular membrane phospholipids where they can be released by lipooxygenases and cyclooxygenases enzymes and transformed in powerful bioactive products wich have cytoprotective and especially anti-inflammatory activities. clinical and epidemiological evidence have firmly established that consumption ofepa and dha may contribute to the prevention and / or treatment of a number of diseases, especially those where inflammation plays a remarkable role in its development. epa and dha exhibit potent anti-inflammatory properties, either via the generation of anti-inflammatory products, such as the resol-vins, or by blocking inflammatory agents. in the present paper we review possible clinical applications of epa and dha in pathologies, such as cardiovascular and neurodegenerative diseases, cancer, inflammatory bowel disease, rheumatoid arthritis and ischemia - reperfusion injury. the evidence suggests that ω-3 lcpufa may have promising applications in the prevention and / or treatment of different clinical and nutritional pathologies.
áCIDOS GRASOS OMEGA-3 (EPA Y DHA) Y SU APLICACIóN EN DIVERSAS SITUACIONES CLíNICAS OMEGA-3 FATTY ACIDS (EPA AND DHA) AND ITS APPLICATION IN DIVERSE CLINICAL SITUATIONS
Rodrigo Valenzuela B,Gladys Tapia O,Marcela González E,Alfonso Valenzuela B
Revista Chilena de Nutricíon , 2011,
Abstract: Los ácidos grasos poliinsaturados de cadena larga omega-3 (AGPICL ω-3) como el ácido eicosapentaenoico (EPA) y docosahexaenoico (DHA) se encuentran en cantidades importantes en los pescados grasos (atún, jurel y salmón) y especialmente en el aceite obtenido de estas especies, el cual actualmente se utiliza como suplemento nutricional (nutracéutico). Tanto el EPA como el DHA, luego de ser ingeridos, se incorporan rápidamente a los fosfolípidos de las membranas celulares donde pueden ser liberados por enzimas lipooxigenasas y ciclooxigenasas, originando productos con potentes propiedades citoprotectoras y especialmente antiinflamatorias. La evidencia clínica y epidemiológica de múltiples estudios permite establecer que el consumo de EPA y DHA puede contribuir a la prevención y/o tratamiento de una serie de patologías, especialmente aquellas donde la inflamación juega un papel preponderante en su desarrollo. El EPA y el DHA presentan propiedades antiinflamatorias, vía la generación ya sea de agentes anti-inflamatorios, como las resolvinas, o a través del bloqueo de agentes pro-inflamatorios. En el presente artículo se presentan evidencias sobre las posibles aplicaciones clínicas de los AGPICL ω-3 en patologías tales como las enfermedades cardiovasculares, neurodegenerativas, cáncer, enfermedad inflamatoria intestinal, artritis reumatoidea e injuria por isquemia - reperfusión. La evidencia sugiere que los AGPICL ω-3 pueden tener promisorias aplicaciones en el tratamiento y/o la prevención de diferentes patologías clínicas o nutricionales. Omega-3 long-chain polyunsaturated fatty acids (ω-3 LCPUFA) eicosapentaenoic acid (EPA) and docosahexae-noic acid (DHA) are found in significant amounts in fatty fish (tuna fish, mackerel and salmon) and especially in the oil obtained from these species, which is actually utilized as a nutritional supplement (nutraceutical). After ingestion, both EPA and DHA are rapidly incorporated into cellular membrane phospholipids where they can be released by lipooxygenases and cyclooxygenases enzymes and transformed in powerful bioactive products wich have cytoprotective and especially anti-inflammatory activities. Clinical and epidemiological evidence have firmly established that consumption ofEPA and DHA may contribute to the prevention and / or treatment of a number of diseases, especially those where inflammation plays a remarkable role in its development. EPA and DHA exhibit potent anti-inflammatory properties, either via the generation of anti-inflammatory products, such as the resol-vins, or by blocking inflammatory agents. I
Quantum Matter-Photonics Framework: Analyses of Chemical Conversion Processes
O. Tapia
Physics , 2014,
Abstract: A quantum Matter-Photonics framework is adapted to help scrutinize chemical reaction mechanisms and used to explore a process mapped from chemical tree topological model. The chemical concept of bond knitting/breaking is reformulated via partitioned base sets leading to an abstract and general quantum presentation. Pivotal roles are assigned to entanglement, coherence,de-coherence and Feshbach resonance quantum states that permit apprehend gating states in conversion processes. A view from above in the state energy eigenvalue ladder, belonging to full system spectra complement the standard view from ground state. A full quantum physical view supporting chemical change obtains.
Quantum physical states for describing photonic assisted chemical change: I. Torsional phenomenon at femtosecond time scale
O. Tapia
Physics , 2012,
Abstract: Femtosecond torsional relaxation processes experimentally detected and recently reported by Clark et al. (Nature Phys. 8,225 (2012)) are theoretically dissected with a Hilbert/Fock quantum physical (QP) framework incorporating entanglement of photon/matter base states overcoming standard semi-classic vibrational descriptions. The quantum analysis of a generic Z/E (cis/trans) isomerization in abstract QP terms shed light to fundamental roles played by photonic spin and excited electronic singlet coupled to triplet states. It is shown that one photon activation cannot elicit femtosecond phenomenon, while a two-photon pulse would do. Estimated time scales for the two-photon case indicate the process to lie between a slower than electronic Franck-Condon-like transition yet faster than (semi-classic) vibration relaxation ones.
Juventud e imagen regional del mundo . Mundo de la vida y sociedad civil
Pedro Canales Tapia,Rodrigo Merino
Ultima Década , 2003,
Abstract:
TOWARDS A QUANTUM MOLECULAR MEASUREMENT THEORY: STERN-GERLACH THOUGHT EXPERIMENTS AT THE INTERFACE OF HILBERT AND REAL SPACES
O. Tapia,H. Fidder
Journal of the Chilean Chemical Society , 2004,
Abstract:
Development of Upstream Data-Input Models to Estimate Downstream Peak Flow in Two Mediterranean River Basins of Chile  [PDF]
Roberto Pizarro-Tapia, Rodrigo Valdés-Pineda, Claudio Olivares, Patricio A. González
Open Journal of Modern Hydrology (OJMH) , 2014, DOI: 10.4236/ojmh.2014.44013
Abstract: Accurate flood prediction is an important tool for risk management and hydraulic works design on a watershed scale. The objective of this study was to calibrate and validate 24 linear and non-linear regression models, using only upstream data to estimate real-time downstream flooding. Four critical downstream estimation points in the Mataquito and Maule river basins located in central Chile were selected to estimate peak flows using data from one, two, or three upstream stations. More than one thousand paper-based storm hydrographs were manually analyzed for rainfall events that occurred between 1999 and 2006, in order to determine the best models for predicting downstream peak flow. The Peak Flow Index (IQP) (defined as the quotient between upstream and downstream data) and the Transit Times (TT) between upstream and downstream points were also obtained and analyzed for each river basin. The Coefficients of Determination (R2), the Standard Error of the Estimate (SEE), and the Bland-Altman test (ACBA) were used to calibrate and validate the best selected model at each basin. Despite the high variability observed in peak flow data, the developed models were able to accurately estimate downstream peak flows using only upstream flow data.
Lupinus microcarpus Growing in Arsenic—Agricultural Soils from Chile: Toxic Effects and It Potential Use as Phytoremediator Plant  [PDF]
Oscar P. Díaz, Yasna Tapia, Rubén Pastene, Marcia Cazanga, Rodrigo Segura, Santiago Peredo
Journal of Environmental Protection (JEP) , 2016, DOI: 10.4236/jep.2016.71011
Abstract: Arsenic (As) is the most important contaminant of the environment in northern Chile. The purpose of the present work is to study As-toxicity symptoms on Lupino microcarpus (lupine), an annual legume plant that constitutes part of the desert community of the pre-Andean area of the Antofagasta Region, Chile. This plant species is cultivated in As-agricultural soil collected from Chiu Chiu (northern Chile) which is classified as arid soils. Control soil (0 - 20 cm depth) is collected from an area located in the central zone of Chile, which is classified as molli soil. The main physic-chemical characteristics of As-soil and the control soil are determined. Eighteen plastic pots of 1.6 L (fifteen for experimental and three for control) are filled with As-soil and control soil treatments. Two plants are cultivated in each pot and then separated leaves and roots for As-analysis. Visual As-toxicity symptoms such as foliar chlorosis, necrosis of the leaf tips and margins, leaf wilting and stunted are determined. Total As concentrations in soils where lupine is cultivated, reach levels between 5.3 - 14.2 mg·kg-1 d.w. (control soil As-level: 3.1 mg·kg-1). Roots show higher As-concentration than leaves, both experimental plants as control plants (2.28 - 9.1 mg·kg-1 d.w., and 0.76 mg·kg-1 d.w., respectively) and low values of transport index (TI) (0.16 - 0.34). All of visual As-toxicity symptoms determined is showed by lupin cultivated in As-agricultural soils. Neither control lupin plant suffers any toxicity symptoms. The results indicate that lupine plants do not resist contamination and accumulated higher levels of As in roots. Lupine can be used in the phytostabilisation of As immobilizing it by microbial activity in agricultural soil.
Tumor de la confluencia hiliar hepática (Klatskin)
Casta?o Llano,Rodrigo;
Revista Colombiana de Gastroenterologia , 2011,
Abstract: this is a clinical case of a 71-year-old man with an obstructive lesion of the hepatic hilum, the clinical, imaging studies and the lab tests suggest a klatskin tumor, which was managed by percutaneous biliary drainage to relieve the jaundice. in this review we consider the pathogenetic factors of these tumors, a new anatomic classification and the various alternative imaging studies, emphasizing the bismuth-corlette classification. confront palliative alternatives, such as different types of endoscopic stents or percutaneous approach, drainage extension (uni or bilateral). finally, we review the surgical aspects and possibilities of chemotherapy and radiotherapy in these tumors.
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