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.
The growing uses of paper in the 19th century created a demand for an efficient paper fastener.[2] Modern paper fastening devices started with the patent of the first paper fastener on September 30, 1841 by Samuel Slocum. This crude device stuck pins on paper to fasten them. Unfortunately, a thorough examination of Slocum's patent drawing and description would indicate that this machine was not a paper fastener at all, but a machine that stuck a number of pins to paper for the purpose of packaging them in quantity. Historically, Samuel Slocum's life's work was the development and sale of pins. His invention was solely for the purpose of marketing the pins that he manufactured. On August 7, 1866, the Novelty Paper Fastener was patented by the Patent Novelty Mfg Co.