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)
Symptoms of Mold allergies. Treatments for Mold allergies. Treatment of mold allergy is dependant upon the type of allergic symptom, the body system affected, and the severity of the reaction. Antihistamines - Useful for allergic rhinitis and some allergy mediated skin conditions.