Word: aniline
(lookup in dictionary)
(lookup stats)
Dates: during 1923-1923
Sort By: most recent first
(reverse)
Bacteriologists have long used anilin dyes of various colors to " stain " different species of bacteria. The tubercle bacillus does not stain easily, but when it does, it clings tenaciously to the dye, in spite of immersion in alcohol and strong acids, and for this reason is called " acid-fast." Non-acid-fast bacteria (such as the typhoid bacillus) yield readily to the " antibodies" produced by the injection of dead bacteria of the same disease. But the acid-fast germs are encased in or contain fatty cells called " lipoids," which resist digestion when injected into the body and thus generate...