Carotenoids. Carotenoids are very long-chain water-repelling pigments that are synthesized in the plastids of plant cells. In the sunflower, a common carotenoid, ss-Ã, carotene is produced in the chromoplasts of the ray flowers to produce bright-yellow orange. colorsarotenoids. Carotenoids are very long-chain water-repelling pigments that are synthesized in the plastids of plant cells. In the sunflower, a common carotenoid, ss-Ã, carotene is produced in the chromoplasts of the ray flowers to produce bright-yellow orange. colors
Bette Nesmith Graham. Liquid Paper Inventor. As electric typewriters came into widespread use after World War II, Bette Nesmith Graham and countless other secretaries let out a collective groan. The new machines did make typing easier, but their carbon-film ribbons made it impossible to correct mistakes neatly with a pencil eraser.
Salt print. Edinburgh Ale: James Ballantine, Dr George Bell and David Octavius Hill by Hill & Adamson, a salt print from a calotype paper negative, ca. 1844. The salt print was the dominant paper-based photographic process for producing positive prints during the period from 1839 through approximately 1860. The salted paper technique was created in the mid-1830s by English scientist and inventor Henry Fox Talbot.