Two scientists contributed to the discovery of the first virus, Tobacco mosaic virus. Ivanoski reported in 1892 that extracts from infected leaves were still infectious after filtration through a Chamberland filter-candle. Bacteria are retained by such …

browse

The discovery of heroin and the development of heroin abuse are introduced. Heroin, the hydrochloride of diacetylmorphine, was discovered by acetylation of morphine. Heroin, in pharmacological studies, proved to be more effective than morphine or codeine. The Bayer Company started the production of heroin in 1898 on a commercial scale.

Dec 23, 2011 · The discovery of aspirin is customarily said to have resulted from Felix Hoffmann's rheumatic father encouraging his son to produce a medicine devoid of the unpleasant effects of sodium salicylate. ... His laboratory reports from 27September 1898 onward do not reveal why Dreser was then testing acetylsalicylic acid on its own rather than with ...

3/31/2022- Use the coupon code "spring" to get MrN 365 - which now includes our Reading Comprehension Assessment System and other new features …

Oct 22, 1995 · Sorted by Year of Discovery. Note: This list only includes the 109 officially named elements. Also, there is some disagreement about the discovery year of some elements. Please see the element itself for additional discovery information, especially if you question our dates.

Maine was a United States Navy ship that sank in Havana Harbor on February 15, 1898, contributing to the outbreak of the Spanish–American War in April. American newspapers, engaging in yellow journalism to boost circulation, claimed that the Spanish were responsible for the ship's destruction. The phrase, "Remember the Maine! To hell with Spain!" became a rallying …

On April 25, 1898, the Spanish–American War began. On May 1, 1898, in the Battle of Manila Bay, the Asiatic Squadron of the U.S. Navy, led by Commodore George Dewey aboard the USS Olympia, decisively defeated the Spanish naval forces in the Philippines. With the loss of its naval forces and of control of Manila Bay, Spain lost the ability to ...

Sep 16, 2015 · By July 1898, he had demonstrated that mosquitoes could serve as intermediate hosts for bird malaria. After feeding mosquitoes on infected birds, he found that the malaria parasites could develop in the mosquitoes and migrate to the insects’ salivary glands, allowing the mosquitoes to infect other birds during subsequent blood meals.

Instructions. The search form recognizes IAU numbers, designations, names, and JPL SPK-ID numbers. When searching for a particular asteroid or comet, it is best to use either the IAU number, as in 433 for asteroid “433 Eros”, or the primary designation as in 1998 SF36 for asteroid “25143 (1998 SF36)”.However, using the asteroid/comet name will also work, as in Ceres for …