Land snails and slugs produce mucus, but so does every other kind of gastropod, from marine, freshwater and terrestrial habitats. The reproductive system of gastropods also produces mucus internally from special glands.
Dry ice was discovered rather than invented. It was first discovered by Charles Thilorier a French chemist in 1834. Check link below for more information on dry ice and dry i â¦ ce makers.
Dry ice is also formed into nuggets, by forcing the snow through stainless steel dies with round holes that are one-eighth to three-quarters of an inch in diameter. The nuggets break off in random lengths of 1 to 2 inches. Dry ice does not melt, but vaporizes, passing from a solid state to a vapor without going through a liquid state. This is called sublimation. The time this takes depends on temperature, air movement and whether the dry ice is in an enclosed area. Dry ice is what is called an expendable refrigerant, which leaves nothing behind when it evaporates, so it is desirable for shipping and storing a variety of foods.