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.
Mediastinal masses are caused by a variety of cysts and tumors; likely causes differ by patient age and by location of the mass (anterior, middle, or posterior mediastinum).The masses may be asymptomatic (in adults) or cause obstructive respiratory symptoms (in children).ediastinal masses are caused by a variety of cysts and tumors; likely causes differ by patient age and by location of the mass (anterior, middle, or posterior mediastinum).