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Biology subjects

Chappell, S.

Publications and source records attributed to Chappell, S..

2 recordsLinked to original sources

A searchable database of publications using fluorescent probes and flow cytometry to study antigen-specific B cells

The study of antigen-specific B cells has resulted in important advances in all fields of immunology, the development of experimentally and/or clinically useful antibodies, and as a starting point for rationally designed vaccine antigens. A key innovation allowing for widespread study of antigen-specific B cells was the development of fluorescent antigen probes for use with flow cytometry. Initially these studies were mostly focused upon B cells specific for a variety of model antigens, but over the past decade focus has shifted towards the study of B cells specific for antigens from pathogens such as SARS-CoV-2, HIV, and Influenza virus. Importantly however, these types of approaches have been used for hundreds of different antigens and could be used for thousands more. Unfortunately, studies of B cells specific for an antigen of interest are not easily searchable on current publication databases since these assays are often a small portion of a larger publication. To overcome this, we built a searchable database of studies analyzing antigen-specific B cells by flow cytometry using fluorescent antigen probes that is located at www.immunology.virginia.edu/Taylor/Bcell/Database.php. Using this database, we assessed the number of publications per year revealing rapid growth in the use of this approach in recent years. While much of this rapid growth was focused upon the assessment of B cells specific for SARS-CoV-2, HIV-1, or Influenza virus, studies assessing B cells specific for hundreds of different antigens derived from numerous microbes, animals, plants, or other sources can be found in the database. Combined, the antigen-specific B cell database was built to facilitate identification of studies assessing these cells and for analysis of the field as a whole. O_FIG O_LINKSMALLFIG WIDTH=200 HEIGHT=18 SRC="FIGDIR/small/680531v1_ufig1.gif" ALT="Figure 1"> View larger version (6K): org.highwire.dtl.DTLVardef@f07f5forg.highwire.dtl.DTLVardef@13a3b95org.highwire.dtl.DTLVardef@1dcd79org.highwire.dtl.DTLVardef@9cddaa_HPS_FORMAT_FIGEXP M_FIG C_FIG

immunology↗

A video-rate hyperspectral camera for monitoring plant health and biodiversity

Hyperspectral cameras are a key enabling technology in precision agriculture, biodiversity monitoring, and ecological research. Consequently, these applications are fuelling a growing demand for devices that are suited to widespread deployment in such environments. Current hyperspectral cameras, however, require significant investment in post-processing, and rarely allow for live-capture assessments. Here, we introduce a novel hyperspectral camera that combines live spectral data and high-resolution imagery. This camera is suitable for integration with robotics and automated monitoring systems. We explore the utility of this camera for applications including chlorophyll detection and live display of spectral indices relating to plant health. We discuss the performance of this novel technology and associated hyperspectral analysis methods to support an ecological study of grassland habitats at Wytham Woods, UK.

ecology↗