In contrast to direct stains that bind to bacteria directly, a negative stain colors the background of a smear rather than the bacteria. These stains have negatively charged functional groups so they ...

Negative staining is a powerful preparative method for studying particulate specimens. In principle, the specimen is surrounded by heavy metal atoms that act as an electron barrier. Because the ...

But what are the differences between gram-positive and gram-negative bacteria ... bacteriologist Hans Christian Gram developed a staining procedure to view bacteria under the microscope.

LPS is an endotoxin that is important in triggering the body’s immune response. Gram-negative cells will stain pink with the Gram stain. If your staining procedure was successful you will see Gram ...