1. Articles from Raymond E. Goldstein

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    1. Feature Of The Week 9/27/09: Collective Dynamics of Swimming Bacteria: OCT Studies

      Feature Of The Week 9/27/09: Collective Dynamics of Swimming Bacteria: OCT Studies

      Feature Of The Week 9/27/09: Physical mechanisms governing large-scale organization of self-propelled biological microparticles, such as motor proteins, swimming bacteria, and other motile cells, attract significant attention among physicists and biologists. Scientists from Argonne National Laboratory, Imalux, and Cambridge University, discovered that commonly found bacteria such as Bacillus Subtilis are in fact highly efficient mixers for the liquid they live in. Thanks to original non-invasive optical coherence tomography developed by Imalux Corporation, OH, the scientists observed with unprecedented precision the phenomena unfolding in the liquid containing the bacterial suspension. The measurements revealed up to 100-fold increase of mixing ...

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    2. Enhanced mixing and spatial instability in concentrated bacterial suspensions

      High-resolution optical coherence tomography is used to study the onset of a large-scale convective motion in free-standing thin films of adjustable thickness containing suspensions of swimming aerobic bacteria. Clear evidence is found that beyond a threshold film thickness there exists a transition from quasi-two-dimensional collective swimming to three-dimensional turbulent behavior. The latter state, qualitatively different from bioconvection in dilute bacterial suspensions, is characterized by enhanced diffusivities of oxygen and bacteria. These results emphasize the impact of self-organized bacterial locomotion on the onset of three-dimensional dynamics, and suggest key ingredients necessary to extend standard models of bioconvection to incorporate effects of ...
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  2. Topics in the News

    1. (2 articles) Argonne National Laboratory
    2. (2 articles) Imalux
    3. (1 articles) University of Cambridge
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    Feature Of The Week 9/27/09: Collective Dynamics of Swimming Bacteria: OCT Studies Normative data and associations of Optical Coherence Tomography Angiography measurements of the macula: The Singapore Malay Eye Study Automatic Segmentation and Measurement of Choroid Layer in High Myopia for OCT Imaging Using Deep Learning In-process monitoring in laser grooving with line-shaped femtosecond pulses using optical coherence tomography Three-dimensional opto-thermo-mechanical model for predicting photo-thermal optical coherence tomography responses in multilayer geometries The role of optical coherence tomography angiography in moderate and advanced primary open-angle glaucoma OCT-angiography follow-up of choroidal neovascularization treated with treat- and- extend aflibercept regimen to avoid over-treatment A Review of Spectroscopic and Non-Spectroscopic Techniques for Diagnosing Breast Cancer Collaboration Between Seno Medical and Cogmedix Drives GOLDEN Results for Innovative Medical Breast Imaging System Prediction of Retinal Ganglion Cell Counts Considering Various Displacement Methods From OCT-Derived Ganglion Cell-Inner Plexiform Layer Thickness Changes of blood flow in macular zone of patients with diabetic retinopathy at different stages evaluated by optical coherence tomography angiography Very late stent thrombosis lacking findings of the typical causes on optical coherence tomography in a patient with SARS-CoV-2