In step 2 of an electrophilic addition, the positively charged intermediate combines with (Y) that is electron-rich and usually an anion to form the second covalent bond.Step 2 is the same nucleophilic attack process found in an SN1 reaction.n step 2 of an electrophilic addition, the positively charged intermediate combines with (Y) that is electron-rich and usually an anion to form the second covalent bond.
A. The Sleep Test Optimization Program is prior. authorization initiative for Polysomnography (PSG). There are two types of sleep studies â (1) Attended. Sleep Studies - performed in an outside facility, office, sleep clinic or laboratory; and (2) Unattended.
Sleep Study (Polysomnogram) â¢ Noninvasive, pain-free procedure that usually requires spending a night or two in a sleep facility. The testing bedrooms are designed to resemble a typical bedroom, with decor dÃ©cor and televisions to help make you feel as relaxed as. possible