Angela M. Vargas

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Phytophthora infestans (Mont.) de Bary, the causal agent of potato late blight, is responsible for tremendous crop losses worldwide. Countries in the northern part of the Andes dedicate a large proportion of the highlands to the production of potato, and more recently, solanaceous fruits such as cape gooseberry (Physalis peruviana) and tree tomato (Solanum(More)
Phytophthora infestans, the causal agent of late blight in crops of the Solanaceae family, is one of the most important plant pathogens in Colombia. Not only are Solanum lycopersicum, and S. tuberosum at risk, but also several other solanaceous hosts (Physalis peruviana, S. betaceum, S. phureja, and S. quitoense) that have recently gained importance as new(More)
Title of Thesis: Detection of Fecal Contamination on Cantaloupes and Strawberries Using Hyperspectral Fluorescence Imagery Angela M. Vargas, Master of Science, 2006 Thesis directed by: Professor, Yang Tao Biological Resources Engineering Department Fluorescence methods are widely used for investigation of biological materials, and in recent years have also(More)
A 33-year-old woman with corneal ectasia after radial and astigmatic keratotomy had corneal collagen crosslinking with resultant gaping of the inferior incisions (2 radials and 1 transverse) that required suturing. At 6 months, the incisions healed leaving fibrotic scars. Visual acuity, refractions, corneal photographs, and topographic and corneal wavefront(More)
Charcoal canisters are commonly used to measure radon concentration for periods of 2-7 days. The radon absorption and desorption process is known to be sensitive to several environmental parameters such as temperature, relative humidity and radon concentration fluctuation. In the present study a set of exposures under different environmental conditions were(More)
BACKGROUND Late blight, caused by Phytophthora infestans, is one of the most devastating diseases found in potato and tomato crops worldwide. In Colombia it also attacks other important crops: cape gooseberry and tree tomato. The knowledge of the pathogen population is determinant to effectively design control strategies. AIMS To determine the(More)
We evaluated the effect of cadmium (Cd) on the structure and function of the head kidney in the freshwater fish Colossoma macropomum (C. macropomum). Juveniles were exposed to 0.1 mg/L CdCl2 for 31 days. Blood samples were examined using hematological tests and head kidney histology was determined by light microscopy. The concentration of Cd in the head and(More)
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