On the Application of Image Processing Methods for Bubble Recognition to the Study of Subcooled Flow Boiling of Water in Rectangular Channels.

This work introduces the use of machine vision in the massive bubble recognition process, which supports the validation of boiling models involving bubble dynamics, as well as nucleation frequency, active site density and size of the bubbles. The two algorithms presented are meant to be run employing quite standard images of the bubbling process, recorded in general-purpose boiling facilities. The recognition routines are easily adaptable to other facilities if a minimum number of precautions are taken in the setup and in the treatment of the information. Both the side and front projections of subcooled flow-boiling phenomenon over a plain plate are covered. Once all of the intended bubbles have been located in space and time, the proper post-process of the recorded data become capable of tracking each of the recognized bubbles, sketching their trajectories and size evolution, locating the nucleation sites, computing their diameters, and so on. After validating the algorithm's output against the human eye and data from other researchers, machine vision systems have been demonstrated to be a very valuable option to successfully perform the recognition process, even though the optical analysis of bubbles has not been set as the main goal of the experimental facility.

Implementación de la Técnica Reacción en Cadena de la Polimerasa en el Diagnóstico de Salmonella y Shigella directamente de muestras fecales / Implementation of the Technical Polymerase Chain Reaction in the Diagnosis of `Salmonella` and Shigella directly of fecal samples

Las diarreas causadas por bacterias son las que potencilamente suponene un mayor riesgo vital para el paciente, siendo los patógenos más importantes Shiggella y Salmonella que se ubican entre las causas principales de muerte en niños menores de cinco años, e spor esto que resulta de vital importancia realizar un diagnóstico rápido y preciso, junto a un tratamiento efectivo.

Imunossupressäo por diferentes drogas na reaçäo de hipersensibilidade retardada à ovalbumina / Immunosupression by different drugs in the reaction of delayed hypersensitivity to ovalbumine

Os autores descrevem as etapas de um modelo de reaçäo de hipersensibilidade retardada (RHR) ao antigeno ovalbumina (OA), utilizando camundongos BALB/c. O processo inflamatório resultante traduziria a açäo de macrófagos ativados por citocinas provenientes de células T previamente ativadas e por isso, capaz de simular o que ocorreria nos episódios de rejeiçäo de aloenxertos de órgäos (rim) e também em algumas doenças auto-imunes (glomerulopatias). A intensidade deste processo inflamatório permitiria avaliar e quantificar a resposta imune, mediada pela célula T a imunógenos (OA) e, através do uso deste modelo, estudar a açäo de drogas imunossupressoras, como a ciclosporina A e a azatioprina, as quais, nos experimentos realizados inibiram de maneira significante a RHR a OA.