On the Size of Minimal Visibility Graphs

The main goal of a recent article [3] by X. Shen and H. Edelsbruner is to establish a lower bound on the number of edges in the visibility graph of a finite set of line segments. As was pointed out by Campbell and Higins in [2], Shen and Edelsbruner’s proof of this lower bound is flawed. However, the alternate proof supplied by Campbell and Higgins is also incorrect

Methods for reactive oxygen species (ROS) detection in aqueous environments

This review summarizes direct and indirect analytical methods for the detection and quantification of the reactive oxygen species (ROS): 1O2, O2·−/HOO·, H2O2, HO·, and CO3·− in aqueous solution. Each section briefly describes the chemical properties of a specific ROS followed by a table (organized alphabetically by detection method, i.e., absorbance, chemiluminescence, etc.) summarizing the nature of the observable (associated analytical signal) for each method, limit of detection, application notes, and reaction of the probe molecule with the particular ROS