Signs and Symptoms. Because the signs of AS can be similar to those of other behavioral problems, it's best to let a doctor or other health professional evaluate a child's symptoms. Many kids are diagnosed with attention deficit hyperactivity disorder (ADHD) before a diagnosis of AS is made later.
Rubber begins to melt at approximately 180 degrees Celsius. At low temperatures, around 5 C to 6 C, there is a risk that rubber hardens because of crystallization. The optimum temperature for rubber is 20 C.
The silicon melt temperature was measured for 30 min. The temperature variations at the melt surfaces and bottom with the temperature of crucible top and bottom being 1450Â°C and 1430Â°C are shown in Fig. 4. The concentrations of boron added are non-doping, 1Ã10 18 and 1Ã10 20 atoms/cm 3, respectively.