Ozone physiological properties

Over-pressurization, See also Pressure rupture, 46 Ozone, 16 hazards, 303 physical properties, 303 physiological properties, 304 precautions, 304... 

The chemical properties partly resemble those of white, partly those of red, phosphorus. It does not glow in the air, but does so in ozone. It is rapidly attacked by alkalies, giving hypophosphite and phosphine which is not spontaneously inflammable. It is coloured intensely black by ammonia. It dissolves in aqueous alcoholic potash giving red solutions from which acids precipitate a mixture of phosphorus and solid hydride. It dissolves in phosphorus tribromide to the extent of about 0-5 gram in 100 grams of the solvent at about 200° C. It is said to be non-poisonous its physiological properties probably resemble those of red phosphorus (q.v.). 

There is no reason to believe that stomatal opening is different in leaves of different ages, so the entry of PAN into the intercellular spaces of the leaf is probably the same as the entry of ozone. One can hypothesize that the chemical composition of the leaf is such that resistance is conferred at particular physiologic states. Such a hypothesis would lead to a search for compounds that combat the oxidizing and acylating properties of PAN. 

Properties of the air pollutants sulfur dioxide, nitrogen oxides, peroxyacyl nitrates, and ozone have been considered from chemical, biochemical, and physiological points of view. Physiological observations cannot demonstrate the chemical mode of toxicity. Chemical and in vitro biochemical studies may be irrelevant at the physiological level. Consideration of all three approaches indicates which hypotheses of toxicity are more plausible and suggests new areas of investigation. 

Physiological Action.—Owing to its powerful oxidising properties, ozone is both a deodoriser and a bactericide of considerable efficiency. Schonbein 3 found that air, laden with organic matter hberated m the course of one minute from 4 oz. of putrid flesh, may be completely deodorised by its own volume of air containing 1 volume of ozone per... 

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