Angola's Incomplete Transition

sub-Saharan Africa, Angola, conflict, economic reform

Joint Analysis of Preschool Education and School Performance in Public Schools in Montevideo.

This paper aims at explaining the academic performance of a sample of children starting their first year at public schools in Montevideo, Uruguay, during 1999. We are mainly in- terested in the effect of preschool education on the children’s academic results. Previous probit and OLS estimations suggested that preschool education has a positive impact on short and long term school performance. However, these results could be biased because a rather strong endogeinity of the preschool education variable. We solved this problem us- ing bivariate probit and treatment effects estimations. The results confirmed the bias and suggested that our previous estimations underestimated the positive effect of preschool educations. Thus, we found fairly strong empirical evidence suggesting that preschool education has a short and long term positive effect on these children’s resultspreschool education, school results, bivariate probit, treatment effects, Uruguay

Angola's incomplete transition

Angola’s difficulties in achieving macro-economic stability and economic liberalization have serious implications for private-sector development. Hyperinflation, and frequent policy reversal, constrain and distort investment in both the informal and formal parts of the private sector. But macro-economic instability arises in part out of mechanisms that subsidize powerful oligopolies, enabling them to capture a portion of the large oil rents. These subsidies, together with market controls, enable the oligopolies to profit at the expense of small- and micro-enterprises, thereby hindering the creation of more employment for Angola’s poor. Therefore the new private sector that is evolving in Angola owes its character to three factors: the course of the war; the country’s natural resource windfall; and the way in which liberalization and privatization have been pursued

Utilidad de la ecografía en el diagnóstico de masas pélvicas

En la actualidad existe discrepancia en relación a la utilidad de la ecografía al momento de diagnosticar tempranamente patologías neoplásicas, principalmente del ovario, ya que estas neoplasias, detectadas en sus estadios iniciales tienen un mejor pronóstico. Con este propósito se han realizado varios estudios para la generación de índices que pretenden unificar criterios para aproximarse a la detección de tumores malignos pélvicos, sin embargo al existir divergencia entre ellos, en este trabajo se han reunido los criterios de mayor significancia estadística, con el fin de alcanzar el objetivo de diagnóstico temprano de tumores pélvicos malignos

Educación Preescolar y Rendimiento Escolar en las Escuelas Públicas de Montevideo

In this paper we try to explain the academic performance of a sample of children starting their first year at public schools in 1999 in Montevideo, Uruguay. We are mainly interested in the effect of pre-school education on the children’s academic results. We found fairly strong empirical evidence suggesting that pre-school education has significant short and long-term positive effect on these children’s results. We also found that other factors connected with schools and with households lie behind children’s short-term and long-term performance. It is also important to note that the results for boys are clearly differentiated from those for girls.pre-school education, school performance, Education Production Function, Probit, Tobit, Oaxaca-Blinder, Uruguay.

Protein conjugated with aldehydes derived from lipid peroxidation as an independent parameter of the carbonyl stress in the kidney damage

<p>Abstract</p> <p>Background</p> <p>One of the well-defined and characterized protein modifications usually produced by oxidation is carbonylation, an irreversible non-enzymatic modification of proteins. However, carbonyl groups can be introduced into proteins by non-oxidative mechanisms. Reactive carbonyl compounds have been observed to have increased in patients with renal failure. In the present work we have described a procedure designed as aldehyde capture to calculate the protein carbonyl stress derived solely from lipid peroxidation.</p> <p>Methods</p> <p>Acrolein-albumin adduct was prepared as standard at alkaline pH. Rat liver microsomal membranes and serum samples from patients with diabetic nephropathy were subjected to the aldehyde capture procedure and aldol-protein formation. Before alkalinization and incubation, samples were precipitated and redisolved in 6M guanidine. The absorbances of the samples were read with a spectrophotometer at 266 nm against a blank of guanidine.</p> <p>Results</p> <p>Evidence showed abundance of unsaturated aldehydes derived from lipid peroxidation in rat liver microsomal membranes and in the serum of diabetic patients with advanced chronic kidney disease. Carbonyl protein and aldol-proteins resulted higher in the diabetic nephropathy patients (p < 0.004 and p < 0.0001 respectively).</p> <p>Conclusion</p> <p>The aldehyde-protein adduct represents a non oxidative component of carbonyl stress, independent of the direct amino acid oxidation and could constitute a practical and novelty strategy to measure the carbonyl stress derived solely from lipid peroxidation and particularly in diabetic nephropathy patients. In addition, we are in a position to propose an alternative explanation of why alkalinization of urine attenuates rhabdomyolysis-induced renal dysfunction.</p

Construcción II

1 archivo PDF (212 páginas) 2a. ed. 2000; 2a. reimpresión 2007El objeto de este trabajo es el facilitar a los alumnos del segundo curso de construcción de la carrera de ingeniería civil de la Universidad Autónoma Metropolitana el aprendizaje respecto a los documentos que establece la Ley de Contratos y Obras Públicas para la celebración de concursos que permitan el otorgamiento de contratos para la ejecución de obras, así como la técnica para el estudio de precios unitarios de los conceptos de trabajo que se establecen en los catálogos de concursos

Educación Preescolar y Rendimiento Escolar en las Escuelas Públicas de Montevideo

En este trabajo se evalúa de qué depende el rendimiento escolar de los alumnos que comenzaron el ciclo escolar en 1999 en las escuelas públicas de Montevideo, Uruguay, prestando particular atención al impacto del preescolar. Los resultados señalan que la concurrencia a preescolar tiene un importante efecto positivo en la probabilidad de obtener buenos resultados en el corto y largo plazo en el ciclo escolar. La estimación de los modelos estocásticos también sugiere que existen otros factores ligados al hogar del niño y la escuela que afectan los resultados escolares, y que no son independientes del sexo del alumno

Parámetros para el proceso de elaborar y caracterizar yogurt batido con leche de cabra según norma técnica peruana 202.092:2008 (revisada el 2013) leche y productos lácteos

El principal objetivo del presente trabajo de investigación fue determinar los parámetros en el proceso para elaborar y caracterizar yogurt batido de leche de cabra según norma técnica peruana 202.092:2008(revisada 2013) de leche y productos lácteos. Para la población se empleó 20 litros de leche de cabra, con la cual obtendremos 20 litros de yogurt de leche de cabra el cual se distribuyó en cinco litros por bloque y los tratamientos que se aplicaron fueron cuatro proporciones de solidos de leche (20, 30,40, 50 gr/lt) en la elaboración de yogurt, frente a un tratamiento testigo (Ogr/lt. de solidos de leche), Los resultados experimentales obtenidos fueron sometidos a un diseño de Bloques Completamente aleatorios, cuatro repeticiones por tratamiento y un tamaño de unidad experimental de un litro de yogurt, para ello se aplicó el análisis de varianza, separación de medidas (prueba Duncan a p<=0.05), al igual que las características organolépticas. Determinándose los parámetros de las características físico-químicas, en donde los valores de pH y porcentaje de acidez titula ble obtenidos no se vieron afectados estadísticamente con el contenido de solidos de leche y los mismos están dentro de los parámetros de Norma Técnica Peruana yogurt. Leche y productos lácteos 202.09-2008 la que señala valores de pH 4.2 a 4.5 y porcentaje de acidez titulable entre y 60% a 90%