The PCT will then program the dialysis machine to the patientâs settings, assess and prepare the vascular access and connect the dialysis tubing to the access. The PCT will also look at the access to make sure it is in good working order. A dialysis treatment can take several hours. The PCT will monitor the patient and check vital signs every half hour as well as monitor the dialysis machine for the entire treatment time. After the patient is done dialyzing, the PCT will take the patient off the machine and weigh them again.
Most brass will melt at temperatures as low as 1,650ÂºF (900ÂºC), but a higher maximum temperature will give you a margin of error, and make the brass easier to pour.
Thus if the plumber were to add aluminium, instead of tin, to the lead, the two metals would not dissolve - they would behave like oil and water. When cast, the metals would separate into two layers, the heavy lead below and aluminium above. One difficulty in making alloys is that metals have different melting points. Thus copper melts at 1,083C, while zinc melts at 419C and boils at 907C So, in making brass, if we just put pieces of copper and zinc in a crucible and heated them above 1,083C, both the metals would certainly melt.