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.
The mediastinal lymph nodes are located in the region of the thoracic cavity between the lungs known as the mediastinum. There are two major groups of mediastinal lymph nodes: the anterior and posterior nodes.