Publications by authors named "Oscar Londono"
Here, a machine learning tool (YOLOv5) enables the detection of microorganisms using optical and phase contrast microscope images. The two databases were processed using 520 images (optical microscopy) and 1200 images (phase contrast microscopy). It used Python libraries to label, standardize the size, and crop the images to generate the input tensors to the YOLOv5 network (s, m, and l).
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- Magnetic nanoparticles (MNps) have promising applications in biomedicine, such as drug delivery and MRI imaging, but their safety and potential toxicity remain under-researched due to varying surface modifications.
- The study focused on synthesizing citrate-coated magnetite nanoparticles (IONps) and assessed their toxic effects using both in vitro and in vivo models, finding that they did not significantly impact cell viability or cause adverse effects in animal testing.
- Despite a slight increase in iron levels in the liver, the nanoparticles demonstrated a simple and effective production method, showing potential as safe and effective drug delivery systems.
Introduction: The Kaposi's sarcoma (KS) incidence has markedly changed in the general population since the onset of the AIDS epidemic in the eighties and after the introduction of the Highly Active Antiretroviral Therapy (HAART) in the nineties.
Objective: To investigate incidence rate trends for Kaposi's sarcoma before and during the (HIV/AIDS) epidemic in Cali, Colombia.
Methods: Exploratory ecological study that included all Kaposi's sarcoma cases identified by the Cali Cancer Registry from 1962-2007, and 12,887 cases of HIV/AIDS recorded in the Municipal Health Secretariat of Cali between 1986 and 2010.