Nodal example sentences

Skoog and his co-workers observed that from the internodal segments of tobacco stems the callus (a mass of undifferentiated cells) proliferated only if, in addition to auxins the nutrients medium was supplemented with one of the following: extracts of vascular tissues, yeast extract, coconut milk or DNA.Petroleum refineries act as a nodal industry for synthetic textile, fertiliser and numerous chemical industries.Regiment after regiment mutinied and took off to join other troops at nodal points like Delhi, Kanpur and Lucknow.The eighteenth century saw the rise of Bombay, Calcutta and Madras, which are nodal cities today.