The contrast of an image produced by epifluorescence microscopy may be increased by placing a high-pass dichroic reflecting film behind the sample. As servers may have different cooling needs, an airflow throttling mechanism is coupled to each server to individually adjust the flow resistance through each server based on the amount of cooling airflow needed by a server. The unrevealed balance may include an indication of an outcome of a real-world wager that has not yet been revealed to the user. The planetary gear mechanism is operatively connected between the hub shell and the driver. When the position of the rail connector is altered by sliding the rail connector along the bracket, the angle of the rail receiving receptacle is altered, thereby changing the angle at which a rail may be attached to the post. The methods employ as refolding agents one or more compounds which are non-detergent zwitterionic compounds, such as sulfobetaines, substituted pyridines, substituted pyrroles and acid substituted aminocyclohexanes.