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A estrutura do carvão e do char: a sua relação com a mitigação dos gases de estufa

The results of projects POCI/CLI/60557/2004 and PPCDT/CLI/60557/2004 are summarized. The aim of these projects was the characterization of two coal sets (one vitrinite-rich increasing rank coal set; and one medium rank coal set with increasing inertinite volume) and their related char, and their relation with fluidized bed NO and N2O emissions

Passeio Geológico da Foz do Douro: Consciencialização para a Geoconservação

The "Foz do Douro Geological Walk" has contributed to the public awareness of the Porto shoreline geoconservation. Considering the different school Knowledge, and in order promote significant practices in the aim of Geology, it was created in 2008 an Interpretative Centre and developed some science education materials. The investment in this project has proven to be fructiferous ; A criação do "Passeio Geológi...

Control and minimization of crud in a shallow layer gravity settler

Proporção volumétrica dos constituintes do corpo lúteo de Nelore

Volumetric proportions and nuclear diameter of the small and large luteinic cells of the corpus luteum (CL) were evaluated in ovaries of 17 Nelore cows and heifers, collected in slaughterhouse and classified into two groups: group I (GI, n=7), non-pregnant animals, and group II (GII, n=10), pregnant animals. The CL was reduced to small cuts (less than 3mm), which were fixed in Bouin solution and processed for m...

Oxidação electroquímica de compostos lipídicos como precursora do tratamento an...

A digestão anaeróbia é um processo de tratamento de efluentes e simultaneamente uma fonte de energia, através da produção de biogás. A presença de compostos lipídicos nos efluentes não só causa problemas de inibição dos microorganismos como pode levar à lavagem do sistema, sendo frequente a aplicação de pré-tratamentos. Os tratamentos físico-químicos mostram-se, por vezes, insuficientes e originam lamas indesej...

Características de ovários de fêmeas zebu (Bos taurus indicus), colhidos em aba...

The ovarian characteristics of pregnant and non pregnant zebu cows (Bos taurus indicus) were studied. The ovaries were obtained in slaughterhouses, identified and divided into: group I, non pregnant animals (GI, n=43) and group II, pregnant animals (GII, n=43). The ovaries were measured and cut in their lenght for measuring and evaluation of the corpus luteum (CL) characteristics. For the GI the measures for th...

Friedreich's ataxia: clinical and molecular study of 25 Brazilian cases

INTRODUCTION: Friedreich's ataxia is a neurodegenerative disorder whose clinical diagnostic criteria for typical cases basically include: a) early age of onset (< 20 or 25 years), b) autosomal recessive inheritance, c) progressive ataxia of limbs and gait, and d) absence of lower limb tendon reflexes. METHODS: We studied the frequency and the size of expanded GAA and their influence on neurologic findings, age ...

Transient behaviour and rate effects in resistive detectors

The dependence of the detection efficiency (or charge gain) of a resistive detector on the counting rate has been considered by several authors. The influence of the resistivity of the electrodes, the counter geometry and the gas mixture composition have also been studied. Most of those measurements assume a stationary regime. In the present work we report on studies of the transient behaviour of detectors with...