Novel imidazoquinoxalines and salts thereof, pharmaceutical compositions containing such compounds, and methods of using such compounds in the treatment of protein tyrosine kinase-associated disorders such as immunologic disorders. In particular, transition metal complexes of diarylacetylenes, e. A shielding member is attached to the board member. The switches provide a conduction path to shunt current away from the battery such that the battery does not charge beyond a safe level. The thermal difference detector detects the temperature difference between the first and second temperature sensing junctions and provides a measurement signal that is indicative of the temperature difference between the two temperature sensing junctions that is indicative of the measured current. The method enables diagnosing osteoporosis.