brushings

Example:The scientists studied the interactions in the protein's structure.

Definition:The process of influencing one another, especially in a mutual or parallel way; the action of operating on something in order to change its condition, nature, or effect.

Example:Their encounters were short but stimulating.

Definition:The meeting of people or things; a contest, especially by combatants; a situation in which something happens to someone; a meeting by chance.

Example:The dealings between the two companies were fruitful.

Definition:Action or handling; the act of transacting business; intercourse, especially as restricted by particular considerations; a valuation, especially the estimated worth of property for taxation; an exchange of business, etc., for purposes of mutual advantage; a contract or agreement.