University of Oviedo

About: University of Oviedo is a education organization based out in Oviedo, Spain. It is known for research contribution in the topics: Population & Catalysis. The organization has 13423 authors who have published 31649 publications receiving 844799 citations. The organization is also known as: Universidá d'Uviéu & Universidad de Oviedo.

A Review of LED Drivers and Related Technologies

Abstract: Light-emitting diode (LEDs) have a promising prospect because of its outstanding advantages: 1) long lifetime, 2) environmentally friendly, 3) flexibility of color mixing, 4) high illumination efficiency, etc. Based on the electrical characteristics of LEDs, a constant current driver is needed to support the LED working performance. With the wide applications of LEDs, many new technologies are presented. In this paper, advantages and disadvantages of different LED drivers are discussed. A detailed technology review is presented which is good for researchers and engineers to make right choices in design and selection of LED drivers.

Detection of Periodontal Bacteria in Atheromatous Plaque by Nested Polymerase Chain Reaction

Abstract: Background: In recent years, increasing evidence regarding the potential association between periodontal diseases and cardiovascular diseases has been identified. The available evidence underlines the importance of detecting periodontal pathogens on atheromatous plaque as the first step in demonstrating the causal relationship between the two conditions. The main aim of this investigation is to detect periodontitis-associated bacteria from carotid artery atheromatous plaque from patients who received an endarterectomy using strict sample procurement and laboratory procedures.Methods: Atheromatous plaque from endarterectomies from carotid arteries were scraped and homogenized, and bacterial DNA was extracted. To obtain a representative concentration of amplicons, two amplifications of the bacterial 16S ribosomal-RNA gene were carried out for each sample with universal eubacteria primers by a polymerase chain reaction (PCR). A nested PCR with specific primers for the target bacteria was performed next. Stat...

The genetic structure of Spanish Celtic horse breeds inferred from microsatellite data.

Abstract: Partition of the genetic variability, genetic structure and relationships among seven Spanish Celtic horse breeds were studied using PCR amplification of 13 microsatellites on 481 random individuals. In addition, 60 thoroughbred horses were included. The average observed heterozygosity and the mean number of alleles were higher for the Atlantic horse breeds than for the Balearic Islands breeds. Only eight percentage of the total genetic variability could be attributed to differences among breeds (mean FST approximately 0.08; P < 0.01). Atlantic breeds clearly form a separate cluster from the Balearic Islands breeds and among the former only two form a clear clustering, while the rest of Atlantic breeds (Jaca Navarra, Caballo Gallego and Pottoka) are not consistently differentiated. Multivariate analysis showed that Asturcon populations, Losina and Balearic Islands breeds are clearly separated from each other and from the rest of the breeds. In addition to this, the use of the microsatellites proved to be useful for breed assignment.

An analysis of some environmental consequences of European electrical and electronic waste regulation

Abstract: In recent years, new European Directives have been issued to ensure that Waste Electrical and Electronic Equipment (WEEE) is treated in as environmentally friendly a way as possible. These new European laws call for the creation of new logistics networks to collect all such waste. The purpose of this paper is to show that, under certain circumstances, the environmental impact of these networks could be even higher than the impact of non-collection. Different appliances were analysed (washing machines, refrigerators, TV sets and personal computers) in order to test this hypothesis. The methodology of Life Cycle Assessment (LCA) was applied, highlighting especially the final phase of product life and calculating the threshold beyond which collection is harmful for each type of equipment. The results demonstrate that, depending on the distance travelled to pick up the domestic appliances, recycling is not as environmental friendly as expected, especially when it comes to the impact of fossil fuels or respiratory inorganics (winter smog). This work can be a useful tool for manufacturers (now forced to take back all the equipment after use for subsequent treatment) when designing their new recycling networks from an environmental perspective.