1 Having high or low cholesterol does not exclude a person from donating blood. 2  Potential blood donors may be temporarily prevented from donating if they have a low level of iron (hematocrit) in their blood.
Headline Clickable. To keep food warm without overcooking, set your oven to the lowest temperature (which is probably 200 degrees F) and cover the food with foil.eadline Clickable. To keep food warm without overcooking, set your oven to the lowest temperature (which is probably 200 degrees F) and cover the food with foil.
The bake range can be set between 170Â°F and 500Â°F (77Â°C and 260Â°C). 3. Press START.A preheat time will count down and âPrEâ will appear on the oven display if the actual oven temperature is under 170Â°F (77Â°C).When the actual oven temperature reaches 170Â°F (77Â°C), the timer will continue counting down.