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.
1 The jugulodigastric lymph node is commonly enlarged in both inflammatory and malignant conditions. 2  Children with tonsillitis, young adults with glandular fever or Hodgkin's disease and middleaged adults with cancers of the oral cavity and oropharynx can all present with lymphadenopathy at this site. Skin cancer is common in Australia and both melanoma and squamous carcinoma can metastasise to the lymph nodes in the parotid gland, those in the submandibular triangle and those in the posterior triangle. 2  Approximately 80% of lateral neck lumps in adults will be due to metastatic cancer.