The fluid with the bacteria in it was dotted on to agar plates .
含有细菌的液体在产生斑点后会被涂在琼脂板上。
So for example when the chefs were working on the part of the book focused on gels and thickeners myhrvold was having them concentrate on exotic hydrocolloids like agar or gellan .
He and his graduate student clayton wright dyed some lab bacteria different colors , streaked it onto an agar plate in the shape of the google logo , and let it grow .
