Disclosed are compositions of matter, protocols, and treatment means for generation of tissues capable of administration in a flowable manner through contain with one or more antibiotics, or derivatives of said antibiotics. In one embodiment the invention provides the treatment of morselized amniotic membranes with antibiotics in a manner as to increase buoyancy of morselized components of said amniotic membranes in order to prevent gravity based accumulation of said morselized tissue. In another embodiment buoyancy of morselized tissue is modulated by contacting said tissue with an antibiotic or derivative thereof in a manner to allow for increased uniformity of said morselized tissue components throughout a vessel. In another embodiment, pancreatic islets are isolated and stored in a manner to prevent gravity based aggregation. The invention pertains to all tissues, with emphasize in a preferred embodiment to tissues which are useful when administered in a flowable manner.
