These stains have negatively charged functional groups so they can't bind directly to negatively charged bacteria. The advantages of negative staining are: 1. bacteria are not heat fixed so they don't ...

contain positively charged groups. Examples include methylene blue, basic fuchsin, and crystal violet. These dyes directly bind to and stain the negatively charged surface of bacterial cells. Negative ...

Researchers at Leipzig University have developed a new process for reversing the polarity of chemical compounds, also known as umpolung, for the precise synthesis of pharmaceuticals. This innovative ...