Acetylcholine is an ester of acetic acid and choline with chemical formula CH 3 CO O CH 2 CH 2 N + (CH 3) 3. This structure is reflected in the systematic name, 2-acetoxy-N,N,N-trimethylethanaminium. Acetylcholine (ACh) was first identified in 1914 by Henry Hallett Dale for its actions on heart tissue.
1 Place pork tenderloin in roasting pan. 2  Roast for 30 minutes. 3  Turn the pork over and roast for another 25 minutes. 4  The pork tenderloin is ready when the internal temperature reaches 145 degrees Fahrenheit (63 degrees Celsius).
Place the roast fat-side up in a shallow roasting pan. If you have a wire rack, set it in the pan and set the roast on it. Toss a few cups of mirepoix around the roast and place it in the oven on the center rack. Sear the pork roast until it develops a dark brown color, about 10 to 12 minutes. Lower the temperature to 325 F. Roast pork loin for 22 minutes per pound; roast pork shoulder and leg for 25 minutes per pound. Cover the roast with aluminum foil if you see the top getting too brown. Pork roasts measure 145 F in the center when fully cooked.