The advantage of the batch column is reducing the number of cuts from 2 to 1 and reducing the reflux ratio from 3 to 2 to save time and money. The NaOH used in excess can be reduced from 8% to 1%. The reduction of NaOH allows cost savings for both the NaOH and the H 2 SO 4.he advantage of the batch column is reducing the number of cuts from 2 to 1 and reducing the reflux ratio from 3 to 2 to save time and money. The NaOH used in excess can be reduced from 8% to 1%. The reduction of NaOH allows cost savings for both the NaOH and the H 2 SO 4.
Mediastinal lymphadenopathy or mediastinal adenopathy is an enlargement of the mediastinal lymph nodes.ediastinal lymphadenopathy or mediastinal adenopathy is an enlargement of the mediastinal lymph nodes.
Persistent Afib is a sustained pattern of atrial fibrillation that does not return to normal by itself. A person is usually said to have persistent atrial fibrillation if their heart rate does not return to normal sinus rhythm within 7 days when not treated. Persistent afib is a when the abnormal heartbeat continues until it is returned to normal by some form of treatment. In a lot of patients the Atrial Fibrillation will progress further to the point of Permanent Atrial Fibrillation. This type of afib is now mostly refereed to as Longstanding Persistent Atrial Fibrillation as most patients can now be cured by the newer anti-arrhythmic drugs, or catheter or surgical ablation.