What Is Obesity Hypoventilation Syndrome? Obesity hypoventilation (HI-po-ven-tih-LA-shun) syndrome (OHS) is a breathing disorder that affects some obese people. In OHS, poor breathing results in too much carbon dioxide (hypoventilation) and too little oxygen in the blood (hypoxemia). OHS sometimes is called Pickwickian syndrome.
Click on photo for a larger picture. In the photo above, I am holding two small vials of liquid metal. The vial on the right contains gallium, an element that melts at 29.76Â° Celsius (85.57Â° Fahrenheit). The vial on the left is an alloy that contains gallium, indium, and tin, and melts at -20Â° Celsius (-4Â° Fahrenheit). The gallium is liquid because I had the bottle in my shirt pocket, next to my warm body.
1 Gallium forms a very reflective surface on glass making an excellent mirror. 2  An amalgam of gallium, indium, tin is used in medical thermometers in place of the more traditional and toxic mercury thermometers. Gallium's melting point (302.93 K) is low enough to melt the metal in the palm of your hand. 2  Gallium is the element with the highest range of temperatures for its liquid phase. 3  The difference between gallium's melting and boiling point is 2373 Â°C.