Acne is the most common skin condition in the United States, affecting up to 50 million Americans annually. 1; Acne often causes significant physical and psychological problems such as permanent scarring, poor self-image, depression and anxiety. 2; See your dermatologist for the successful diagnosis and treatment of acne.
Mechanism of action. It is a phosphodiesterase-4 inhibitor, mainly acting on phosphodiesterase 4B (PDE4B), which causes inflammation. Chemically, crisaborole is a phenoxybenzoxaborole. It contains a boron atom that helps penetrate the skin and is essential for its binding activity.
The function of the relay is to provide current to thebackup pump when triggered by the flow switch. Flow Switch: The function of the flow switch is to activate the relay when normal hydraulic powersource fluid flow is interrupted, turning on the backup pump. The flow switch has two terminals(A and B). A is positive.