sensitizer

/'sensitaizə/

Thân thiện

A chemist adds a sensitizer to the reaction flask.

Definition

Noun: 1. A substance that makes something sensitive or more responsive: In chemistry and photography, a sensitizer is a substance that increases the sensitivity of a material to a specific stimulus, such as light, heat, or a chemical reaction. It facilitates a process without being consumed in the same way a catalyst is. 2. A substance that causes an allergic reaction: In medicine and immunology, a sensitizer is an agent (like a chemical or protein) that, upon initial exposure, induces an allergic state in an individual, making them react strongly upon subsequent exposures.

Usage Examples

• Chemistry/Photography:
  • The photographic film contains a silver halide sensitizer to make it responsive to light.
  • Researchers added a chemical sensitizer to the solution to initiate the reaction more efficiently.
• Medicine/Immunology:
  • Nickel is a common skin sensitizer that can cause contact dermatitis.
  • The safety data sheet listed the compound as a potential respiratory sensitizer.

Advanced Usage

• "Photo-sensitizer": A specific type of sensitizer used to make a material sensitive to light, often used in photodynamic therapy for cancer or in certain chemical processes.
  • The doctor applied a photo-sensitizer to the tumor before exposing it to a specific wavelength of light.
• "Cross-sensitizer": A substance that can cause an individual to become sensitive to other, often related, substances.
  • Some fragrances are known to be cross-sensitizers, potentially triggering reactions to a wide range of compounds.

Variants and Related Words

• Sensitize (verb): To make sensitive or more responsive.
  • The treatment will sensitize the cancer cells to radiation.
• Sensitization (noun): The process of becoming sensitive.
  • Repeated exposure led to the sensitization of his immune system.
• Desensitizer (noun): A substance or agent that reduces sensitivity.
  • Toothpaste for sensitive teeth often contains a desensitizer.
• Photosensitizer (noun): A variant spelling of "photo-sensitizer."

Synonyms

• Primer (in some chemical contexts)
• Allergen (specifically in the immunological sense)
• Activator (in a general sense for initiating a process)

Antonyms

• Inhibitor: A substance that slows down or prevents a chemical reaction or process.
• Desensitizer: An agent that reduces sensitivity.
• Blocker: Something that obstructs a reaction or response.

Related Phrases/Compounds

• Chemical sensitizer: Emphasizes use in industrial or laboratory chemistry.
• Immune sensitizer: Specifically refers to an agent that provokes an allergic immune response.
• Sensitizing agent: A more general descriptive term for a sensitizer.

Học thuật

Noun

1. (chemistry) a substance other than a catalyst that facilitates the start of a catalytic reaction

Từ đồng nghĩa

• sensitiser