To obtain instantaneous dehydration, use is made in practice of a stream of hot gas-generally air-the temperature of which ranges between 400 and 1000 C., and a quantity of alumina, of the order of 20 to 150 gr. per cubic meter of hot gas, is continuously dropped therein.
Neoplasm is an abnormal growth of tissue, which if it forms a mass, is commonly referred to as a tumor. This abnormal growth (neoplasia) usually but not always forms a mass. ICD-10 classifies neoplasms into four main groups: benign neoplasms, in situ neoplasms, malignant neoplasms, and neoplasms of uncertain or unknown behavior.
When doctors use the term tumor they are talking generically and not about the size of the lesion. A mass usually refers to a lump which is at least 20 mm (0.787 inches) in diameter at its widest point, while a nodule is less than 20 mm at its widest point.