Publications by authors named "J Arboleda Velazquez"
We report on the design and fabrication of a novel circular pillar array as an interfacial barrier for microfluidic microphysiological systems (MPS). Traditional barrier interfaces, such as porous membranes and microchannel arrays, present limitations due to inconsistent pore size, complex fabrication and device assembly, and lack of tunability using a scalable design. Our pillar array overcomes these limitations by providing precise control over pore size, porosity, and hydraulic resistance through simple modifications of pillar dimensions.
View Article and Find Full Text PDFWe report on the design and fabrication of a novel circular pillar array as an interfacial barrier for microfluidic microphysiological systems ( ). Traditional barrier interfaces, such as porous membranes and microchannel arrays, present limitations due to inconsistent pore size, complex fabrication and device assembly, and lack of tunability using a scalable design. Our pillar array overcomes these limitations by providing precise control over pore size, porosity, and hydraulic resistance through simple modifications of pillar dimensions.
View Article and Find Full Text PDFObjectives: To examine prevalence trends in the use of smoked tobacco products in 11 South American (SA) countries (i.e., Argentina, Bolivia, Brazil, Chile, Colombia, Ecuador, Paraguay, Peru, Suriname, Uruguay, and Venezuela) and their association with country-specific socio-demographic index (SDI) over 30 years.
View Article and Find Full Text PDFBackground: Timely palliative and hospice care, along with advanced care planning, can reduce avoidable high-intensity care and improve quality of life at the end of life (EoL).
Objective: We examined patterns of care at EoL and evaluated predictors of high-intensity care at EoL among adults aged 18-64 with cancer.
Methods: Using data from the Puerto Rico Central Cancer Registry-Health Insurance Linkage Database, we examined 1359 patients diagnosed with cancer in 2010-2019, who died of cancer between 2017 and 2019 at 64 years and younger, and who were enrolled in Medicaid or private health insurance in last 30 days before death.
Article Synopsis
- The study introduces a new photochemical reactor paired with a mass spectrometer designed to measure hydrogen generation from photochemical water splitting.
- Sphalerite-type Zn Cd S catalysts were created using an eco-friendly method that avoids harmful solvents and high temperatures, ensuring safer production.
- The results demonstrated that the new reactor effectively measured hydrogen production rates, achieving a notable 29.5 mmol of hydrogen per gram after 100 minutes of visible light exposure, surpassing previous benchmarks for other materials.