A adhesive composition that includes at least the main components of a hydrolyzable tannin and at least one cationic polymer selected from the group including lysine, -DL-ornithine, \u03b5-poly-ornithine, arginine, glutamine, asparagine, histidine, proline, putrescine, spermidine, spermine, cadaverine, agmatine, citrulline and mixtures thereof. The resulting cured articles have a combination of excellent resistance to alkaline fluids, superior tensile properties and compression set resistance. The light tower may be coupled to the drawbar of an existing towable power plant. The sensing suites are small, robust, sensitive, low-power, inexpensive, and fast in their response to chemical vapor analytes. After deployment, the occluding member prevents blood from flowing from the left ventricle to the left atrium during systole.