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Mostrando ítems 2841-2850 de 3145
Periphyton on non-serpentine and serpentine-derived substrates and small-scale distribution of macroinvertebrates in tropical streams
(2019-11-26)
A common approach to manage and conserve public lands is to survey their ecosystems and their biodiversity. Understanding how complex ecosystems, such as rivers, operate is important to reveal the multifaceted interactions ...
Monitoring the diversity and species distribution of enterococci at a subtropical seawater system in Mayagüez, Puerto Rico
(2015)
Enterococci are an important group of bacteria used as fecal indicator by the United States Environmental Protection Agency (USEPA) to evaluate the quality of recreational waters. Specifically, a beach is “contaminated” ...
Evaluación de métodos de imputación para datos de expresión genética
(2007)
The technology of microarrays introduced in the middle of the nineties allow the analysis of the gene expression levels of thousands of genes simultaneously. The identification of genes with an expression level very different ...
Development of an electro-thermal model for a multi-chip igbt power electronic module
(2004)
A lumped parameter thermal model for a multi-chip power module is presented based in the physical and geometrical characteristics of the module. The model is developed using the thermal component approach. The model is ...
The role of Ca+2 doping on the structural, magnetic and electrical properties of bismuth ferrite powders and films
(2018-07)
The search for alternative ways of collecting, storing and reusing energy has motivated our research to investigate multifunctional materials based on the perovskite structure, such as Bismuth ferrite (BFO). Our scope was ...
Electrochemical characterization of MC3T3-E1 cells cultured on TiAI and Ti6AI-4V alloys for biological implant applications
(2012)
One manner of understanding the processes that occur at the implant surface/cell interface is to utilize the electrochemical response of this system as a consequence of protein adsorption, cell adhesion and cell growth on ...
Cambios en la temperatura vaginal asociados a la actividad física, al estrés por calor y a la humedad en vacas lecheras
(2011)
Heat stress greatly affects the dairy industry especially when the facilities are established in tropical and subtropical environments. The poor design of cattle facilities could provoke that animals have to walk long ...
Metazoan parasites of snappers, Lutjanidae (Pisces) from Puerto Rico
(2004)
A total of 47 species of parasites were collected from 131 specimens of 13 species of
fishes of the family Lutjanidae (Pisces). Host specificity was analyzed using the
calculated mean intensity from each infection. ...
Design and characterization of log periodic rectangular slot ring antenna
(2008)
This work studies two log-periodic rectangular slot ring antennas configurations. The first configuration is a CPW feed antenna. Return Loss ≤ - 10dB or VSWR ≤ 2 is achieve throughout 5.90 to 12.60GHz for this configuration, ...
Mortar mix design with fly ash and nano-silica for structural patchment
(2020-07-24)
Mortars with sufficient bonding and mechanical strength are alternative remedies to restore the original resistance of a failed structural element, prolonging its longevity. The present thesis proposed the analysis of ...