Kinetic parameters of polymer degradation by SAPO-37

High density poly(ethylene) has been submitted to thermal degradation alone, and in the presence of silicoaluminophosphate SAPO-37. The processes were carried out in a reactor connected on line to a gas chromatograph/mass spectrometer in order to analyze the evolved products. Polymer degradation was also evaluated by thermogravimetry, from room temperature until 800 degreesC, under nitrogen dynamic atmosphere, with multiple heating rates. From TG curves, the activation energy related to degradation process was calculated using the Flynn and Wall multiple heating rate kinetic model for pure polymer (PE) and for polymer in the presence of catalyst (PE/S37). SAPO-37 showed good selectivity for low molecular mass hydrocarbons in PE catalytic degradation.

Carcass and meat quality traits of wild boar (Sus scrofa s. L.) with 2n=36 karyotype compared to those of phenotypically similar crossbreeds (2n=37 and 2n=38) raised under same farming conditions. 1. Carcass quantity and meat dressing

The aim of this study was to compare wild boar (chromosomal number 2n = 36) to phenotypically similar animals of 2n = 37 and 2n = 38 chromosomes (crossbreeds) with respect to live weight, carcass yield, meat yield, fat and weight of inner organs. All animals were born and raised on the same farm and slaughtered at 39 weeks. The final live weight of wild boar 2n = 36 was significantly lower (47.2 kg) as compared to crossbreeds (80.0 kg). Animals 2n = 36 had more carcass yields (65.5%) than 2n = 37 karyotype (64.9%) and 2n = 38 (64.4%). Wild boar had the highest yields for the cuts with bones and boneless cuts compared to crossbreeds. Therefore, variations in karyotype are accompanied by differences in some carcass quantitative traits, i.e., 2n = 36 grow and fatten slower than crossbreeds 2n = 37 and 2n = 38. (c) 2008 Elsevier Ltd. All rights reserved.

Use of 37% carbamide peroxide in the walking bleach technique: A case report

Dental bleaching represents an effective, conservative, and relatively low-cost method for improving the appearance of discolored pulpless teeth. Among the bleaching techniques, the walking bleach technique with sodium perborate associated with water or hydrogen peroxide stands out because of its esthetic results and safety. A modified walking bleach technique with the use of 37% carbamide peroxide as the bleaching agent is presented. Additionally, the adverse effects of dental bleaching in the following restorative procedures are discussed, showing the advantages with the use of 37% carbamide peroxide.

Pico e flutuação da pressão intra-ocular: comparação entre curva tensional diária e teste de sobrecarga hídrica e comparação entre 2 testes de sobrecarga hídrica em horários diferentes

Pós-graduação em Bases Gerais da Cirurgia - FMB

ECLAC Notes Nº 37

Worrisome Decline in Labour Conditions Being Young in Ibero-America Op- ed, by José Luis Machinea:For a Social Cohesion Pact Highlights; Carbon Markets: An Opportunity for Latin America and the Caribbean Indicators Economic Lag Causes Social Decline in Haiti Recent Titles Calendar

Notas de la CEPAL Nº 37

Preocupa deterioro de la situación laboral Ser joven en Iberoamérica Columna de opinión de José Luis Machinea: Por un pacto de cohesión social Precisiones: Mercados de carbono: oportunidad para América Latina y el Caribe Indicadores Rezago económico provoca deterioro social en Haití Publicaciones recientes Calendario

Notas de Población Vol. 37 N° 92

Este número de Notas de población tiene por objeto difundir varios de los trabajos presentados en los seminarios-talleres relativos a los ámbitos de la salud y las condiciones de vida.

Notas de Población Vol.37 N° 90

En los últimos años, el Centro Latinoamericano y Caribeño de Demografía (CELADE) - División de Población de la CEPAL ha formado parte de una iniciativa internacional para medir la actividad económica nacional por edad, en el marco del proyecto internacional sobre las cuentas nacionales de transferencias liderado por los profesores Ronald Lee, de la Universidad de California en Berkeley, y Andrew Mason, del Centro Este-Oeste de Estudios sobre Población y Desarrollo en Honolulu. Más de 30 países de 5 continentes participan actualmente en el proyecto mundial de cuentas nacionales de transferencias. Por medio del CELADE, la CEPAL coordina el proyecto regional para América Latina y el Caribe, con el apoyo financiero del Centro Internacional de Investigaciones para el Desarrollo (IDRC) del Canadá y de la Universidad de California en Berkeley. En octubre de 2009, el CELADE organizó una reunión de expertos que marcó el final de la primera fase del proyecto. En el presente volumen de Notas de población se presenta un informe de esta reunión de expertos, acompañado por una selección de artículos presentados en dicha ocasión.