That ingredient was agar, a gelatinous substance isolated from seaweed. She mentioned this to her husband, who also worked in the lab. He reported the idea to Koch, who eventually used it to ...

This creates a jelly-like substance that gives these sweets their chewy texture. If you’re looking for a vegetarian or vegan ...

Her canvas is a Petri dish full of a jelly-like substance called agar, which the brightly colored bacteria love to eat. She carefully dips a flame-sterilized wire—her paintbrush—in the ...