The acetogenin annonacin, from the tropical annonaceous plant Annona muricata, is a lipophilic, mitochondrial complex I inhibitor reported to be more toxic than rotenone to mesencephalic neurons. The temperate annonaceous plant Asimina tri/oba...
BACKGROUND: Regulated secretion of protein by salivary and other exocrine glands requires correct trafficking of soluble cargo proteins into secretory vesicles. However, the molecular mechanism of sorting in the parotid salivary gland is unknown....
A novel catalyst with hydro-desulfurization and hydrogenation capabilities was tested with the aim of producing ultra-low sulfur and aromatics diesel oil. The catalytically active phase is nickel in a reduced valence state on a carrier made of zinc...
Acridine is a compound that has a ring system similar to anthracene except that one of the CH groups is replaced by a -N- group. It is possible for this compound to have desmotropic forms as those that follow. When an amino group is present in the...
Postal service--History; Postal service--Southwest, Old
In every civilization of which any record has been preserved, there is known to have been some organized plan for maintaining communication by couriers who were either post runners or riders mounted. The relaying of these couriers was an obvious...
Acridine was discovered by Graebe and Caro who found that it accompanied the crude
anthracene obtained from coal-tar. For its isolation, the portion of the tar distilling at 300°- 360° C. was extracted by dilute sulphuric acid and precipitated by...
Mammoth Cave Park, Kentucky. Caption on back: "Remains of saltpeter leading vats in Mammoth Cave where nitrates were obtained for the American army and navy gunpowder in the War of 1812. Note crude wooden water pipe in foreground." A man...
Leaf from a twelfth century theology book, copied at the Monastery of Citeaux in France. The book was written on animal skins since paper was not used in Europe at that time, and was intended for study or for reading aloud within the monastic...
"As in certain paintings by Francis Bacon, existential givens were made stubbornly palpable in Guston's pictures. Recurrent images such as a head with a single wide-open eye, wrist-watches, bare light-bulbs, or cigarette butts spoke of bouts...
