Dialysis technicians also clean the dialysis machines before and after use. The majority of dialysis technicians are employed in hospitals and work full time. Their schedule might consist of evening, night, weekend, and holiday hours because hospitals are open 24 hours a day, 7 days a week. Some dialysis technicians work in medical clinics that offer dialysis treatments.
One of the most consistently used facts by 9/11 conspiracy theorists is that the grade of steel used in the World Trade Center simply couldn't melt at the temperatures fires created when jetliners slammed into the structures. And they're right. Steel's melting point is 2,750 degrees Fahrenheit (1510 Celsius). Yet jet fuel only burns between 800 and 1500 degrees Fahrenheit (426.7 and 815.5 Celsius) [source: Popular Mechanics].
Tungsten's melting point of 3422 Â°C is the highest of all metals and second only to carbon (3550 Â°C) among the elements. This is why tungsten is used in rocket nozzles and reactor linings. There are refractory ceramics and alloys that have higher melting points, notably $\ce{Ta4HfC5}$ with a melting point of 4215 Â°C, hafnium carbide at 3900 Â°C and tantalum carbide at 3800 Â°C. Carbon cannot be used to hold molten tungsten because they will react to form tungsten carbide.