At the end of the column they elute one at a time. During the entire chromatography process the eluent is collected in a series of fractions. Fractions can be collected automatically by means of fraction collectors. The productivity of chromatography can be increased by running several columns at a time.
dash - the act of moving with great haste; he made a dash for the door bolt rush, rushing, haste, hurry - the act of moving hurriedly and in a careless manner; in his haste to leave he forgot his book
Titles: Underline, Italics, or Quotations? (printable version here) When writing about other works, it's hard to decide when to underline (or place in italics) a title and when to place it in double quotations. Note that some publications have a house style that must be followed.