ptomain

Thân thiện

A scientist carefully examines a sample for ptomain in the laboratory.

Definition

Noun: 1. A type of amine produced by decaying organic matter: A ptomain is any of several, often toxic, organic compounds formed by the action of putrefactive bacteria on proteins during decomposition.

Usage Notes

• Technical Term: "Ptomain" is a specialized term used primarily in chemistry, biochemistry, and forensic pathology. It is not commonly used in everyday conversation.
• Historical Context: The term was once commonly associated with "ptomaine poisoning," an outdated concept for food poisoning thought to be caused by these bacterial byproducts. Modern science identifies specific bacterial toxins or the bacteria themselves (e.g., , ) as the primary causes.

Examples

• The forensic scientist identified the presence of ptomains in the tissue sample, indicating advanced decomposition.
• Early theories of food poisoning incorrectly blamed ptomains like putrescine and cadaverine for the illness.

Advanced Usage

• "Ptomaine poisoning": An antiquated term for food poisoning, based on the mistaken belief that ptomains were the primary toxic agents. This term is now considered scientifically inaccurate.
  • Example: The doctor explained that what was once called "ptomaine poisoning" is now known to be a staphylococcal toxin.

Variants and Related Words

• Ptomaine (noun): An alternate, equally correct spelling of "ptomain."
• Biogenic amine (noun): A broader chemical class that includes ptomains. Ptomains are specific types of biogenic amines formed during putrefaction.

Synonyms

• Putrefactive amine: A descriptive synonym emphasizing the origin from decay.
• Cadaverine: A specific, common ptomain (1,5-diaminopentane).
• Putrescine: A specific, common ptomain (1,4-diaminobutane).

Notes on Different Meanings

The word "ptomain" has a single, specific chemical meaning. Its historical use in "ptomaine poisoning" represents an outdated application of the term, not a separate definition.

Học thuật

Noun

1. any of various amines (such as putrescine or cadaverine) formed by the action of putrefactive bacteria

Từ đồng nghĩa

• ptomaine