starting buffer
Definition
Noun: A starting buffer is a specific buffer solution used at the beginning of a chemical or biochemical reaction. Its primary function is to establish and maintain the initial pH and ionic conditions required for the reaction to proceed correctly.
Usage
The term is used specifically in scientific contexts, particularly in chemistry, biochemistry, and molecular biology, to refer to the prepared solution into which reactants are introduced to initiate a process.
Examples
- The enzyme's activity was measured after adding the substrate to the starting buffer.
- It is crucial that the starting buffer has the correct pH and salt concentration for protein purification.
- The protocol specifies preparing 50 mL of starting buffer before beginning the chromatography run.
Advanced Usage
- In chromatographic techniques like ion-exchange or affinity chromatography, the starting buffer (or "equilibration buffer") is the solution used to prepare the column before the sample is applied. It sets the chemical environment that determines how substances in the sample will interact with the column material.
Variants and Related Words
- Buffer (n): A solution that resists changes in pH when acid or alkali is added.
- Running Buffer (n): The buffer solution used to elute substances through a chromatography column or gel during the main phase of a separation.
- Elution Buffer (n): A buffer solution used specifically to displace a target molecule from a chromatography column by changing the chemical conditions.
Synonyms
- Initial buffer
- Equilibration buffer (in specific chromatographic contexts)
Antonyms
- Elution buffer (specifically contrasts as the buffer used at the of a process to remove bound material, whereas the starting buffer is used at the to establish conditions).
Noun
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buffer solution at the start of a reaction
