ptomaine


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Related to ptomaine: ptomaine poisoning

ptomaine

, ptomain
any of a group of amines, such as cadaverine or putrescine, formed by decaying organic matter

Ptomaine

 

any of various nitrogenous chemical compounds formed during the putrefactive decomposition of proteins, processes aided by microorganisms, in such substances as meat, fish, and yeast. Prime examples of ptomaines are biogenic amines, including putrescine and cadaverine, and methylguanidine, agmatine (aminobutyl guanidine), and neurine (trimethylvinyl-ammonium hydroxide). Histamine, tyramine, and tryptamine, which are obtained upon enzymatic decarboxylation of the corresponding amino acids, are also examples of ptomaines.

The idea that ptomaines are responsible for ptomaine poisoning is erroneous, since most ptomaines exhibit a low degree of toxicity. The sole exception to this is neurine, whose effect on the human body resembles that of muscarine—the poison of the mushroom fly agaric (Amanita muscaria). The toxicity of the products of protein decay derives from the presence of strong bacterial toxins. Nearly all ptomaines are normal products of human and animal metabolism; some ptomaines exist in the free state in fungi, brewers’ yeast, higher plants, and food products (cheese). Since the amines that constitute ptomaines have various chemical natures, biological functions, and physiological effects, the term “ptomaine” has become archaic and is rarely used.

E. N. SAFONOVA

References in periodicals archive ?
Through a process we have dubbed "a reduction to the essence," we argue that the osmaz6me alluded to in A rebours, the ptomaine mentioned in En rade, and the sacred essences discussed in Sainte Lydwine de Schiedam and La Cathedrale express in dialectical terms Huysmans's fascination with an authentic presence.
coli and ptomaine, new foodborne infections, specifically those found in tropical areas, are receiving a fair share of research attention.
They continued, even after the inquest, to search for further evidence of ptomaine poisoning in canned fish (McLaren 1993, 129).
That will give me time to get outta the Ptomaine Zone of those so-called "fast food" places that seem to infest convention centers like a had case of foot fungus.
The doctors he fervently believes in are as incompetent at medicine as he is at fiction: they attribute a case of lockjaw to ptomaine poisoning, for example.
In 1936, when "the new Bessie Smith," with a more popular repertoire and a "more elegant look," was asked to step in for Billie Holiday, who had contracted ptomaine poisoning.