Gram-positive bacteria show blue or purple after Gram-staining in a laboratory test. They have thick cell walls. Gram-negative bacteria show pink or red on staining and have thin walls. They release ...

Every day, chemical factories produce a wide range of products that will be extremely difficult to do without in a modern society; everything from medicines like insulin and antibiotics to fertilizers ...

Researchers discovered that gut bacteria could travel to the brain via the vagus nerve in mice, offering clues to the gut-brain axis’ involvement in some neurological disorders. Weiss, Grakoui, and ...