Abstract: A game platform can distinguishes between users in different jurisdictions, can offer eligible players the choice of playing games with the opportunity to enter sweepstakes for monetary and non-monetary rewards, and allows heterogeneous users—those eligible as well as ineligible for monetary reward—to participate in game activity as part of teams.

Abstract: A game platform can distinguishes between users in different jurisdictions, can offer eligible players the choice of playing games with the opportunity to enter sweepstakes for monetary and non-monetary rewards, and allows heterogeneous users—those eligible as well as ineligible for monetary reward—to participate in game activity as part of teams.

Abstract: The present invention provides an apparatus and methods for incubating cells which rely on the use of a semipermeable membrane placed between two planar members, at least one planar member having an aperture.

Abstract: An apparatus for growing tissue cultures in vitro in which the process of growth occurring in nature is more nearly simulated. The apparatus permits a concentration gradient of nutrients to develop through a permeable membrane to which a sample of tissue is attached. The apparatus is such that the growing culture receives substantially all its nutrients and oxygen necessary for growth through the membrane.The permeable membrane is attached to one side of a support and covers one end of a well in the support. A tissue sample is placed within the well and attached to the inside surface of the permeable membrane. A specially designed closed container filled with solution encases the membrane, support, and tissue sample. The container and contents are submerged in a nutrient bath. A concentration gradient develops in the tissue culture as nutrients and oxygen permeate through the membrane to the tissue sample.