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The first person to be executed in the United States by lethal gas was Gee Jon, on February 8, 1924. An unsuccessful attempt to pump poison gas directly into his cell at Nevada State Prison led to the development of the first makeshift gas chamber to carry out Jon's death sentence. [33]
In toxicology, the lethal dose (LD) is an indication of the lethal toxicity of a given substance or type of radiation.Because resistance varies from one individual to another, the "lethal dose" represents a dose (usually recorded as dose per kilogram of subject body weight) at which a given percentage of subjects will die.
A hypoxic, carbon dioxide-free, metabolically inert gas that is less dense than air is provided for inhalation by confining the continually flowing less dense (than air) gas supply and the head in an impermeable bag which is slightly open at the lower neck, which continuously fills from the closed top down to the slightly open neck.
The pressure vessel is a seamless cylinder normally made of cold-extruded aluminum or forged steel. [5] Filament wound composite cylinders are used in fire fighting breathing apparatus and oxygen first aid equipment because of their low weight, but are rarely used for diving, due to their high positive buoyancy.
The inability to find a suitable vein for Smith in 2022 has led Alabama to turn to nitrogen, a method added to the state’s execution procedures in 2018 due to a nationwide shortage of lethal ...
On average, exposures at 100 ppm or greater is dangerous to human health. [23] The WHO recommended levels of indoor CO exposure in 24 hours is 4 mg/m 3 . [ 24 ] Acute exposure should not exceed 10 mg/m 3 in 8 hours, 35 mg/m 3 in one hour and 100 mg/m 3 in 15 minutes.
The median infective dose (ID 50) is the number of organisms received by a person or test animal qualified by the route of administration (e.g., 1,200 org/man per oral). Because of the difficulties in counting actual organisms in a dose, infective doses may be expressed in terms of biological assay, such as the number of LD 50 s to some test ...
A travel gas is a gas mixture which is intended to be used during descent in the depth range where the bottom gas is unsuitable. If a hypoxic bottom gas is required it may not reliably support consciousness at the surface or at shallow depths, and in this case a travel gas will be needed to get through the hypoxic depth range.