A method for removing or scavenging hydrogen sulfide andor mercaptans from supercritical andor liquid carbon dioxide using triazine scavenging agents is described. A needle can move through the region to place stitches in the tissue. pixel and line defect detection, while at the same time preventing large-scale panel damage. The mobile computing device may be a smartphone running the Android mobile OS and a full desktop Linux distribution on a modified Android kernel. If BS acknowledges AP during non-silence interval, AT does not transmit during a subsequent silence interval.