Said of a semiconductor diode, p-n junction, or the emitter-base junction of a transistor, when the polarity of the applied emf is such as to allow substantial conduction to take place, 1  TRANSISTOR.  PNP TRANSISTOR, P-N-P TRANSISTOR.
The symptoms of mold allergy are very similar to the symptoms of other allergies, such as sneezing, itching, runny nose, congestion and dry, scaling skin. Outdoor molds may cause allergy symptoms in summer and fall (or year-round in some climates)
The symptoms of mold allergies can occur throughout the year, and many people experience worsening symptoms in the spring and summer seasons. The symptoms of a mold allergy may occur as a result of either outdoor mold or indoor mold. If you suspect that you have mold allergies, it is a good idea to have allergy testing done in order to determine what is causing your health condition.