Gram reaction
Gram reaction A reaction obtained when bacteria are subjected, in the laboratory, to a certain staining procedure called the Gram stain or Gram's stain (after the Danish scientist Christian Gram (1853–1938) who first devised the technique in 1884). The bacteria are killed and stained, for example with crystal violet; the stained cells are then treated with an organic solvent such as acetone or ethanol. Bacteria fall into two categories: those that are readily decolorized under these conditions, and those that retain the stain. Cells of the former type are said to be Gram-negative; those of the latter type are said to be Gram-positive. The difference in reaction reflects a fundamental difference in the structure of the cell wall in the two types of bacteria.
More From encyclopedia.com
Electrochemistry , Electrochemistry
Electrochemistry deals with the links between chemical reactions and electricity. This includes the study of chemical changes caused… Anode , The word anode is used in two different sets of circumstances: with respect to vacuum tubes and with respect to electrochemical cells.
Vacuum tubes
A… Catabolism , Catabolism is the breakdown of large molecules into small molecules. Its opposite process is anabolism , the combination of small molecules into larg… Antihistamine , Definition
Antihistamines are drugs used to treat the symptoms of allergies and allergic rhinitis by blocking the action of histamine, a chemical rel… Cyclic adenosine monophosphate , cyclic AMP A derivative of ATP that is widespread in animal cells as a second messenger in many biochemical reactions induced by hormones. Upon reach… Enzyme , Enzymes have been called the "agents of life" because all life processes are dependent on them. Enzymes are protein molecules that act as catalysts (…
You Might Also Like
NEARBY TERMS
Gram reaction