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.
Lymphomas, endocrine, mesenchymal, and other rare tumors of the mediastinum. Posteroanterior chest radiograph of a 30-year-old man found to have Hodgkin disease of the mediastinum. Arrows indicate areas of prominent lymphadenopathy associated with his disease.f all parathyroid tumors, only 1-3% are truly mediastinal in location, defined as those inaccessible by standard cervical exploration and requiring median sternotomy for excision. Mesenchymal tumors represent approximately 6% of all masses found in the mediastinum.