Abstract: A preferred embodiment of a bio-medical cryogenic system 10 is described having a unique canister support frame 100. The frame 100 is elongated when in the upright position having side walls 102 and 104, a top wall 114, a bottom wall 118, a back wall 122 and internal dividers 132 forming a narrow elongated cavity subdivided into canister compartments 136 having a front opening 130. Upright abutment lips 121 and 138 are positioned in the compartments 136 to prevent canisters 50 from being inadvertently dislodged from the compartments 136. Access slots 150 are formed in the back wall 122 and at least one of the side walls 102,104 to enable a laboratory person to insert their finger into the slot and push a canister forward while the other hand is lifting a front portion of the canister above the abutment lip 121 or 138.

Abstract: An improved method of blast suppression involves forming an expanded foam barrier maintained in position by a barrier element which, in a preferred form, is inflated and maintained inflated by the foam used to form the foam barrier. Various barrier structures and methods are disclosed for suppression of the blast wave.

Abstract: An improved riot and crowd control interdiction method involves forming, in a defined location, a foam barrier which effectively inhibits passage through the barrier. Other anti-personnel devices may be placed and obscured by the foam barrier. Various barriers and methods to form a contained interdiction foam barrier are disclosed.