Adriano Felipe Perez Siqueira

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Our study aimed to assess the impact of sperm oxidative stress on embryo development by means of a dose-dependent model. In experiment 1, straws from five bulls were subjected to incubation with increasing H2O2 doses (0, 12.5, 25, and 50 μM). Motility parameters were evaluated by Computed Assisted System Analysis (CASA). Experiment 2 was designed to study a(More)
Higher temperatures lead to an increase of testicular metabolism that results in spermatic damage. Oxidative stress is the main factor responsible for testicular damage caused by heat stress. The aim of this study was to evaluate lasting effects of heat stress on ejaculated sperm and immediate or long-term effects of heat stress on epididymal sperm. We(More)
Some biochemical and metabolic characteristics of bovine sperm cells irradiated with low-level laser were probed and correlated to the irradiation parameters. Bovine spermatozoa were exposed to spatially filtered light from a He-Ne laser (633 nm) with fluences from 150 to 600 mJ/cm 2. General biochemical alterations were assessed by vibrational spectroscopy(More)
  • Adriano F. Siqueira, Oswaldo L. C. Guimarães, Hélcio J. Izario Filho, Domingos S. Giordani, Ivy dos Santos Oliveira, Henrique Otávio Queiroz +1 other
  • 2013
Several papers in the literature on Advanced Oxidation Processes (AOPs) confirm the process as a viable alternative for the treatment of a variety of industrial effluents. In many of these works, modeling the variations of Chemical Oxygen Demand (COD) as a function of different experimental conditions was performed by techniques such as Design of(More)
Biodiesel is an important new alternative transportation fuel. Biodiesel processing and quality are close related. The process used to refine the feedstock and to convert it to biodiesel determines whether the fuel will meet the applicable specifications. In this work, a new characterization method is proposed using an electronic nose coupled to artificial(More)
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