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.
Tâsai Lun of China invented paper around 2000 years back. Historians believe that in 3500 B. C. Egyptians first discovered paper. It was made from a reedy plant papyrus which grew around river Nile in Egypt. It was from this plant only that the name paper was derived.âsai Lun of China invented paper around 2000 years back. Historians believe that in 3500 B. C. Egyptians first discovered paper. It was made from a reedy plant papyrus which grew around river Nile in Egypt. It was from this plant only that the name paper was derived.