Reinaldo Alcalde

Reinaldo Alcalde is a Postdoctoral Scholar Research Associate in the Department of Biology and Biological Engineering at the California Institute of Technology (Caltech). Under the advisement of Professor Dianne Newman, his research focuses on microbial behavior under antibiotic gradients, bacterial physiology, and advanced imaging techniques. He is part of the Newman group, which studies geobiological and environmental engineering challenges.

His research interests include antibiotic resistance mechanisms, microbial survival strategies in hostile environments, and the application of microfluidics and microscopy (e.g., quantitative phase, fluorescence, and Fourier ptychography) to study microbial dynamics. Notably, he investigates how bacteria like Shewanella oneidensis and Escherichia coli adapt to spatial gradients of antibiotics and utilize motility or efflux pumps to sustain metabolic activity.

Recent work highlights advancements in 3D imaging technologies (e.g., single-shot volumetric imaging) and their integration with neural networks for biological analysis. His studies also explore microbial interactions in complex environments such as rhizospheres and shale fractures, contributing to environmental engineering and biotechnology applications.

Alcalde has no listed scientific awards but has contributed to over 20 peer-reviewed articles since 2015. His work bridges geobiology, microbiology, and engineering, with a focus on combating antimicrobial resistance and understanding microbial habitability under stress conditions. He collaborates on projects involving microfluidic reactor design and adaptive evolution studies in controlled stress environments.