Abstract: A computer-implemented method and system are described to provide virtual currency in a virtual game. The method may record a purchase value of a value icon in a virtual game. The value icon may then be deployed in the virtual environment of the virtual game. For each of a plurality of reference time periods, interaction of a player of the virtual game with the value icon may be monitored, and a virtual currency amount may be awarded to the player in the event of the player interacting with the value icon a set number of instances during each of the reference time periods. Further virtual currency may be denied upon subsequent interaction with the value icon during the same reference time period.

Abstract: A computer-implemented method and system are described to provide virtual currency in a virtual game. The method may record a purchase value of a value icon in a virtual game. The value icon may then be deployed in the virtual environment of the virtual game. For each of a plurality of reference time periods, interaction of a player of the virtual game with the value icon may be monitored, and a virtual currency amount may be awarded to the player in the event of the player interacting with the value icon a set number of instances during each of the reference time periods. Further virtual currency may be denied upon subsequent interaction with the value icon during the same reference time period.

Abstract: A radiolabeled lymphatic staining agent is mixed on site with a much larger amount, on a weight basis, of a non-radiolabeled lymphatic staining agent to form an injectable radiolabeled lymphatic staining agent suitable for surgical use in humans. Preferably, the radiolabel is I-125, because it has a 60-day half-life which enables it to be made off-site. The preferred radiolabeled lymphatic staining agent is iodinated methylene blue, because it can be mixed with a range of non-radioactive lymphatic staining agents, for example isosulfan blue, methylene blue, patent blue, and patent blue V, to provide the injected agent with sufficient radioactivity to enable machine detection. A method for making radioiodinated methylene blue is also disclosed.