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Search Results: 1 - 10 of 147198 matches for " Paulina B. Bravo "
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Effect of Photon Flux Density and Exogenous Sucrose on the Photosynthetic Performance during In Vitro Culture of Castanea sativa  [PDF]
Patricia L. Sáez, León A. Bravo, Manuel Sánchez-Olate, Paulina B. Bravo, Darcy G. Ríos
American Journal of Plant Sciences (AJPS) , 2016, DOI: 10.4236/ajps.2016.714187
Abstract: The low photon flux density (PFD) under in vitro conditions and sucrose added to the culture medium negatively limits the photochemical activity and photoprotective mechanisms of microshoots. In this work we hypothesize that decreasing sucrose in the culture medium in combination with increasing irradiance, could improve the photosynthesis and consequently the in vitro growth. We evaluated the effect of exogenous sucrose (30 and 5 g·L-1, HS and LS, respectively), under different PFD (50 and 150 μmol photons m-2·s-1, LL and HL, respectively) on the photosynthetic performance and growth of Castanea sativa microshoots. Decreasing sucrose negatively affected the physiological attributes evaluated. Only chloroplast ultrastructure was improved by LS; however this did not lead to an improved in photosynthesis or growth. HL HS produced an increase in photosynthetic activity and chlorophyll contents, reaching under these conditions a higher proliferation rate and biomass production. Additionally, the photochemical activity (electron transport rate and non-photochemical quenching) was improved by HL. Thus, our results suggest that, at least for C. sativa HL is beneficial during the in vitro culture, improving photosynthetic performance as well as growth, but this is only possible in the presence of moderate concentrations of sucrose added to the culture medium.
Trastornos alimentarios del lactante y preescolar
BRAVO J,PAULINA; HODGSON B,M. ISABEL;
Revista chilena de pediatría , 2011, DOI: 10.4067/S0370-41062011000200002
Abstract: eating disorders among nursing and preschool children are a common cause of outpatient consultation in pediatrics and nutrition. it is essential to rule out organic causes, especially when there is nutritional involvement. among non-organic causes there are several subtypes depending upon the trigger. environmental and nutritional factors can be modified. curiously, many of them are directly related to the perception of hunger and satiety the individual will develop from childhood.
Trastornos alimentarios del lactante y preescolar Eating disorders in nursing and preschool children
PAULINA BRAVO J,M. ISABEL HODGSON B
Revista chilena de pediatría , 2011,
Abstract: Los trastornos de la alimentación en el lactante y preescolar siguen siendo un motivo frecuente de consulta en policlínicos de pediatría y nutrición infantil. Descartar causas orgánicas, sobre todo cuando existe compromiso nutricional, es de fundamental importancia. Dentro de los trastornos de origen no orgánico existen varios subtipos dependiendo de la causa desencadenante. Muchos factores involucrados tanto ambientales como nutri-cionales, son susceptibles de ser modificados. Curiosamente, muchos de ellos se relacionan directamente con la capacidad de percepción de las sensaciones de hambre y saciedad que el individuo desarrollará desde ni o. Eating disorders among nursing and preschool children are a common cause of outpatient consultation in pediatrics and nutrition. It is essential to rule out organic causes, especially when there is nutritional involvement. Among non-organic causes there are several subtypes depending upon the trigger. Environmental and nutritional factors can be modified. Curiously, many of them are directly related to the perception of hunger and satiety the individual will develop from childhood.
Chilean University Students’ Call for Participation and Engagement in What Matters to Them: Is It Possible to Achieve a Shared Decision Making Process in Education Policy?  [PDF]
Paulina Bravo, Baltica Cabieses
Creative Education (CE) , 2012, DOI: 10.4236/ce.2012.326155
Abstract: Chile is facing one of its major intellectual revolutions in the last century: organised high school, college and university students have led the most salient educational reform since the one that took place during the dictatorship period. This phenomenon is a pacific revolution based on the power of sound, evidence-based, clear and robust ideas. The purpose of this short essay is to reflect some ideas on the conceptualisation of a shared decision making (SDM) process and how they could be transferred to the current students’ educational revolution in Chile. It provides a reflection on how SDM might concretely contribute to this educational reform and on what future steps could be taken to truly achieves a “participatory” democracy in Chile. According to the authors, this debate illustrates the extent to which the level of participation must rely not on particular individuals but on the establishment of a partnership between parties.
Tirosinemia tipo I: reporte de un caso
Nardiello N.,Ana; Salgado B.,Amparo; Bravo,Paulina;
Revista chilena de pediatría , 2002, DOI: 10.4067/S0370-41062002000600005
Abstract: tyrosinaemia type 1 is an inherited metabolic disorder caused by the deficiency of fumaryl-acetoacetato hydrolase, a terminal enzyme in the degradation pathway of tyrosine. it affects the liver, central nervous system and the kidneys. objective: the rarity of tyrosinaemia type 1 is such that we consider this report important, in order to improve the clinical and laboratory suspicion of this disorder, because with early treatment the prognosis is improved. case report: a boy aged 1 month and 11 days was admitted to the padre hurtado hospital with hyperemesis, abdominal distension and fever of unknown origin. on admission he had macroscopic haematuria and a left palpable kidney. a renal ultrasound showed nephrocalcinosis and bilaterally enlarged kidneys. biochemical screening showed hypercalciuria, hypercalcaemia, hypophosphataemia, hypoalbuminaemia, elevated alkaline phosphatase, ldh, transaminases, bilirubin, an increased tubular reabsorption of phosphate and x-ray signs compatable with rickets. all cultures were negative. the patient continued with abdominal distension and a repeat abdominal ultrasound showed mild ascites. liver function tests were abnormal, prothrombin time 10%, ttpk 112s. due to the high suspicion of tyrosinaemia, alphafetoprotein and amino acid screening were performed, the results confirming the diagnosis. conclusion: the review of the related literature shows the full range of clinical presentations, and a new treatment to improve the outcome in these patients
Tirosinemia tipo I: reporte de un caso Tyrosinaemia Type 1: a clinical case report
Ana Nardiello N.,Amparo Salgado B.,Paulina Bravo
Revista chilena de pediatría , 2002,
Abstract: La tirosinemia tipo I es una enfermedad metabólica de herencia recesiva, causada por la deficiencia de la enzima terminal de la vía de degradación de la tirosina, llamada fumarilacetoacetato hidrolasa. Compromete principalmente el hígado, sistema nervioso central y ri ones. Objetivo: Dada la baja frecuencia de tirosinemia tipo I en nuestro medio, consideramos importante su revisión a raíz de un caso clínico, para optimizar la sospecha diagnóstica frente a la presentación clínica y de laboratorio, e iniciar así su tratamiento en forma precoz, mejorando el pronóstico. Caso clínico: Reportamos un lactante de 1 mes 11 días, que ingresó al Hospital Padre Hurtado, con el diagnóstico de síndrome febril sin foco, acompa ado de vómitos y distensión abdominal. Al ingreso destacó hematuria macroscópica y masa palpable en fosa renal izquierda. Se realizó ecografía abdominal destacando nefrocalcinosis y nefromegalia bilateral y exámenes de laboratorio que muestran hipercalciuria, hipercalcemia, hipofosfemia, hipoalbuminemia, transaminasas, LDH y fosfatasas alcalinas elevadas, bilirrubina con leve aumento de predominio directo, reabsorción tubular de fosfato disminuida, PTH normal, radiografías con signos de raquitismo, cultivos negativos. El paciente evolucionó con distensión abdominal, evidenciándose ascitis moderada en una nueva ecografía abdominal. En el perfil hepático completo destacó protrombina 10%, TTPK de 112 segundos. Ante la fuerte sospecha de Tirosinemia se solicitan alfa feto proteínas que muestran valor muy elevado y aminoacidemia anormal compatible con el diagnóstico. Conclusiones: La revisión de la literatura en relación a esta patología plantea su amplia gama de presentación clínica y las nuevas opciones de tratamiento que han mejorado el pronóstico de estos pacientes, cuales disponemos en nuestro país y fueron aplicadas en este paciente. Tyrosinaemia type 1 is an inherited metabolic disorder caused by the deficiency of fumaryl-acetoacetato hydrolase, a terminal enzyme in the degradation pathway of tyrosine. It affects the liver, central nervous system and the kidneys. Objective: The rarity of tyrosinaemia type 1 is such that we consider this report important, in order to improve the clinical and laboratory suspicion of this disorder, because with early treatment the prognosis is improved. Case report: a boy aged 1 month and 11 days was admitted to the Padre Hurtado hospital with hyperemesis, abdominal distension and fever of unknown origin. On admission he had macroscopic haematuria and a left palpable kidney. A renal ultrasound showed nephrocalcin
Características clínicas, epidemiológicas y factores asociados al diagnóstico de neumonía recurrente en ni os, experiencia de doce a os: a review of 12 cases Clinical characteristics, epidemiology and risk factors of recurrent pneumonia in children
Paulina Bravo J,Paola Olate M,Luis Enrique Vega-Brice?o,Eliana Mu?oz B
Revista chilena de pediatría , 2004,
Abstract: Introducción: La neumonía recurrente ha sido definida como al menos dos episodios de neumonía en un a o o tres o más en toda la vida, con mejoría radiológica entre los episodios. Objetivos: Describir el perfil clínico, epidemiológico y factores asociados al diagnóstico de neumonía recurrente en pacientes controlados en el policlínico de Broncopulmonar de la Pontificia Universidad Católica, durante el periodo comprendido entre enero de 1992 hasta julio del 2003. Pacientes y Métodos: Se revisaron las fichas de pacientes con diagnóstico de neumonía recurrente controlados en el policlínico de Broncopulmonar Infantil. Resultados: Se revisaron un total de 121 pacientes. La mayoría de las neumonías fueron unilobares. En relación a los factores asociados, 19 pacientes eran asmáticos (16%), 15% presentaban trastornos neurológicos de base, 11% trastornos de deglución con aspiración pulmonar. En un 17% no se identificaron factores asociados. Conclusiones: Los factores asociados más frecuentes encontrados fueron: asma bronquial, hiperactividad bronquial, trastornos neurológicos y aspiración pulmonar. Es necesario estudiar si el control de estos factores asociados puede disminuir los episodios de neumonía Background: Recurrent pneumonia has been defined as at least 2 episodes of pneumonia in one year or more than three during any period with radiographic clearing between episodes. Objectives: To determine the frequency of underlying factors for recurrent pneumonia of patients attending outpatients at the Catholic University Hospital between January 1992 and July 2003. Patients and Methods: A retrospective review of the clinical files of children diagnosed with recurrent pneumonia attending the Paedriatric Respiratory outpatient clinic. Results: 121 children fulfilled the diagnostic criteria for recurrent pneumonia. Most of them were unilobar. Underlying illnesses included asthma 16%, neurological disorder 15% and pulmonary aspiration syndrome 11%. In 21% of cases no underlying illness was found. Conclusions: The most common underlying condition for recurrent pneumonia were; asthma, hyper-bronchial responsiveness, neurological disorder and pulmonary aspiration syndrome. A follow-up study needs to be carried out to evaluate whether improved clinicalmanagement of these conditions could effectively lower the risk of a new episode of pneumonia
Caso clínico: radiológico para diagnóstico
MILENA RAMíREZ A.,ALEJANDRO DONOSO F.,LAUDIO DAZA B.,PAULINA BRAVO J.
Revista chilena de pediatría , 2002,
Abstract:
Características clínicas, epidemiológicas y factores asociados al diagnóstico de neumonía recurrente en ni?os, experiencia de doce a?os: a review of 12 cases
Bravo J,Paulina; Olate M,Paola; Vega-Brice?o,Luis Enrique; Mu?oz B,Eliana; Holmgren P,Linus; Sánchez D,Ignacio;
Revista chilena de pediatría , 2004, DOI: 10.4067/S0370-41062004000500004
Abstract: background: recurrent pneumonia has been defined as at least 2 episodes of pneumonia in one year or more than three during any period with radiographic clearing between episodes. objectives: to determine the frequency of underlying factors for recurrent pneumonia of patients attending outpatients at the catholic university hospital between january 1992 and july 2003. patients and methods: a retrospective review of the clinical files of children diagnosed with recurrent pneumonia attending the paedriatric respiratory outpatient clinic. results: 121 children fulfilled the diagnostic criteria for recurrent pneumonia. most of them were unilobar. underlying illnesses included asthma 16%, neurological disorder 15% and pulmonary aspiration syndrome 11%. in 21% of cases no underlying illness was found. conclusions: the most common underlying condition for recurrent pneumonia were; asthma, hyper-bronchial responsiveness, neurological disorder and pulmonary aspiration syndrome. a follow-up study needs to be carried out to evaluate whether improved clinicalmanagement of these conditions could effectively lower the risk of a new episode of pneumonia
Early postnatal hospital discharge: the consequences of reducing length of stay for women and newborns
Bravo, Paulina;Uribe, Claudia;Contreras, Aixa;
Revista da Escola de Enfermagem da USP , 2011, DOI: 10.1590/S0080-62342011000300030
Abstract: the objective of this study is to examine the literature and identify most salient outcomes of early postnatal discharge for women, newborns and the health system. an electronic search strategy was designed including the following sources: web of science, scopus, proquest and pubmed/medline, using the following terms: (early and discharge) or (length and stay) and (postpartum or postnatal) and (effect* or result or outcome). content analysis was used to identify and summarise the findings and methods of the research papers. the evidence available is not enough to either reject or support the practice of early postnatal discharge; different studies have reported different outcomes for women and newborns. the need of systematic clinical research is discussed.
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