Research is typically a profit center for the university. The standard cut (known as "overhead" in the biz) is 30% of research grants. Capital equipment (typically defined as stuff costing more than X dollars) is taxed at a lower rate (usually 10%). Research assistantships are also charged 30%. Also, any modification to lab facilities (electrical or carpentry for example) is usually required to be performed by university staff at a cost (to the grant) of around 2 to 3 times union rates.