The elapsed time required for a specific fluid to pass a designated depth or point in the annulus during pumping operations. Contact time is normally used as a design criterion for mud removal in turb [..]

The weekly timetabled lecture tutorial workshop or practical work sessions approved for each unit or component of a course.

The length of time a substance is in contact with a liquid, before it is removed by filtration or the occurrence of a chemical change.

The length of time a substance is in contact with a liquid, before it is removed by filtration or the occurrence of a chemical change.

The number of hours per week a student is required to attend face to face learning (e.g. in tutorials, lectures, workshops and practical sessions). See also Non-contact time.

A solid-state NMR term referring to the length of the spin-lock period in which the Larmor frequencies of the proton and carbon are matched.

Some chemical cleaning solutions must be in contact with a surface or equipment for a certain amount of time to work effectively, remove dirt or kill bacteria. Check with your chemical supplier.

The time a disinfectant remains wet on a surface.

The period of time required by disinfectant to achieve disinfection