Publications by authors named "Danisha M Rivera Nazario"
Article Synopsis
- Public Health Laboratories (PHLs) in Puerto Rico suffered significant damage from Hurricane Maria, becoming inoperable immediately after the storm.
- A quality management system (QMS) approach was adopted, starting in October 2017 and concluding in May 2018, successfully restoring 92% of the original laboratory testing capacity.
- The lessons learned from this recovery effort are shared as valuable resources for other jurisdictions to improve their public health emergency preparedness.
A quantitative method to detect human exposure to sulfur and nitrogen mustards via protein adducts.
J Chromatogr B Analyt Technol Biomed Life Sci
July 2019
Article Synopsis
- Sulfur and nitrogen mustards are banned toxic chemicals that cause severe skin damage and are categorized as Schedule 1 agents in the Chemical Weapons Convention, due to their ability to react and bind to protein amino acids.* -
- The study introduces a new quantitative assay for detecting specific protein adducts formed by these agents in serum or plasma, utilizing proteinase K digestion and solid phase extraction for analysis.* -
- This method, validated for stability and accuracy, requires only a small sample volume, provides precise quantification of exposure biomarkers, and shows improved efficiency compared to previous techniques.*
Article Synopsis
- - Zinc porphyrin-functionalized fullerene derivatives were created and combined with titania to form composites, which were then studied for their electrochemical properties and energy levels through various measurements.
- - Techniques like Raman, IR, and DLS were used to investigate the chemical groups on titania surfaces, along with the absorption properties and surface areas of the composites.
- - The photocatalytic efficiency of these composites was tested on pollutants like phenol and methylene blue, with the best-performing composite used for cleaning river and wastewater, while byproducts were analyzed using advanced LC-UV/Vis-MS/MS methods.
Article Synopsis
- Researchers developed a new donor-acceptor system using triphenylamine (TPA) as the electron donor and C60 as the electron acceptor, linked via cis- or trans-platinum(II) acetylide.
- Studies utilizing electrochemistry and UV/Vis spectroscopy showed that charge transfer acts as a deactivation mechanism for the singlet excited state, confirmed by transient absorption spectroscopy.
- Selective excitation of the system at 387 nm facilitates rapid charge transfer between TPA and C60, with findings indicating that the cis configuration promotes charge transfer, while the trans configuration yields longer-lived charge-separated states.
Article Synopsis
- C60-Triphenylamine dyads were created to serve as photoswitched layers in organic photovoltaic cells, enhancing their functionality.
- Self-assembled monolayers (SAMs) of these dyads were formed on gold surfaces, demonstrating a dense and well-characterized assembly through various measurement techniques.
- Electrochemical tests showed that when exposed to UV light, the charge-transfer resistance of the dyads changed, indicating a generation of positive charges, which confirms their effectiveness as photoswitchable components.