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November 2016 - March 2021
- Senior Researcher
- -Development of rapid and reference chemistry methods in analysis of food and feed to match needs of a global network of >50 internal laboratories -Method development scope: markers of food oxidation, vitamins, mycotoxins, natural antioxidants, elemental analysis -Design of experiments for method development and validation of intermediary precision/accuracy, project management, statistical analysis, preparation of standard operating procedures and other technical documents, method deployment
January 2013 - May 2013
- Teaching Assistant--Comparative Nutrition and Toxicology
Aflatoxin is a liver carcinogen, and rapid, inexpensive methods to detect its urinary biomarkers are needed. We used a commercial enzyme-linked immuno-sorbent assay (ELISA) for aflatoxin M1 in urine (Helica Biosystems) to test 52 Haitian samples. Using this ELISA, we detected traces above the limit of detection (0.2 ng/ml urine) but below the limit...
Aflatoxins (AFs) are hepato-carcinogenic mycotoxins that can contaminate grains and oil seeds in tropical and sub-tropical areas and have been detected in maize and peanut products of Haiti. Our first objective was to assess human exposure to AFs among Haitians at an urban hospital (GHESKIO) and a rural health center (HCBH). The second objective wa...
The primary objective of this study was to monitor aflatoxin contamination in Haitian samples of raw peanuts (n = 21), peanut butters (n = 32), and maize (n = 30) obtained in Port-au-Prince and Cap Haitien, Haiti, during 2012 and 2013. Our secondary objective was to explore a process that uses a locally produced Haitian spirit (clarin) to transform...
An improved "dilute and shoot" LC-MS/MS multibiomarker approach was used to monitor urinary excretion of 23 mycotoxins and their metabolites in human populations from Asia (Bangladesh), Europe (Germany), and the Caribbean region (Haiti). Deoxynivalenol (DON), deoxynivalenol-3-glucuronide (DON-3-GlcA), T-2-toxin (T-2), HT-2-toxin (HT-2), HT-2-toxin-...
Aflatoxins are mycotoxins mainly produced by the fungi Aspergillus flavus and Aspergillus parasiticus. As the major contaminants of peanuts and maize, aflatoxins are causative agents of liver cancer and are associated with immune dysfunction, stunting, and protein deficiency syndromes. Aflatoxins are known to contaminate maize and peanut-based food...
Context: The Republic of Haiti is a developing country in the Caribbean region with a history that challenges toxicologists, yet the historical panoply of toxicological hazards in Haiti has received little scholarly attention. Objectives: The primary objectives of this paper are to review what is known about Haiti's current toxicological hazards...
I would like to hack a digital burette (Brand Titrette) and a pH meter connected to a platinum electrode with which I am measuring electrical potential during a titration. I would like to integrate data from the digital burette and the meter so that I can automate data entry into an excel spreadsheet and streamline data collection used to generate a titration curve (x-axis: volume, y-axis: potential) that would be used to identify the equivalence point of the titration.
Can anyone recommend a hack that I could use for this purpose? Let me know what other information would be helpful.
Thank you, JS