A cooling system for a gas turbine engine includes a first plenum, a first cooling flow passageway, and a second cooling flow passageway. The invention also concerns novel water-soluble acrylic copolymers and their use as superplasticizers or dispersants for hydraulic binders such as cements. These polypeptides can be covalently modified by in vitro or in vivo reaction with compounds comprising an azide, nitrile oxide, nitrone, diazocarbonyl or 1,2,4,5-tetrazine group. The receptacle aids in separation of more dense material from the fluid medium by forming a void space between the inner and outer surface. Other embodiments may be described and claimed. The present invention accomplishes this by providing a low-profile carrier for temporarily mounting a non-wafer form device.