Paderborn was founded as a bishopric by Charlemagne in 795. In 799 Pope Leo III fled his enemies in Rome and reached Paderborn, where he met Charlemagne. Charlemagne reinstated Leo in Rome in 800 and ...
Legal classification In the United Kingdom, morphine is listed as a Class A drug under the Misuse of Drugs Act 1971 and a Schedule 2 Controlled Drug under The Misuse of Drugs Regulations 2001.In the U ...
The first morphine total synthesis, devised by Marshall D. Gates, Jr. in 1952, remains a widely used example of total synthesis. Several other syntheses were reported, notably by the research groups o ...
Morphine is primarily used to treat both acute and chronic severe pain. It is also used for pain due to myocardial infarction and for labor pains. There are however concerns that morphine may increase ...
After his return to England in 1815, Davy experimented with lamps for use in coal mines. There had been many mining explosions caused by firedamp or methane often ignited by open flames of the lamps t ...
Education, Apprentice and poetry Humphry Davy was born at Penzance in Cornwall, England, United Kingdom, on 17 December 1778. At age 9, Davy was put in the care of his mother's adopted father, John To ...
An arc is the discharge that occurs when a gas is ionized. A high voltage is pulsed across the lamp to "ignite" or "strike" the arc, after which the discharge can be maintained at a lower voltage. The ...
Luigi Galvani was born to Domenico and Barbara Foschi in Bologna, Italy. His father was a goldsmith and his mother was Domenico's fourth wife. His family was not aristocratic, but they could afford to ...
Volta was born in Como, a town in present-day northern Italy (near the Swiss border) on February 18, 1745. In 1774, he became a professor of physics at the Royal School in Como. A year later, he impro ...
NiCd cells, if used in a particular repetitive manner, may show a decrease in capacity called "memory effect". The effect can be avoided with simple practices. NiMH cells, although similar in chemistr ...
Main article: History of the batteryThe symbol for a battery in a circuit diagram. It originated as a schematic drawing of the earliest type of battery, a voltaic pile.The usage of "battery" to descri ...
Main article: History of the battery § Invention of the batteryApplications On March 20, 1800, Volta wrote to the London Royal Society to describe the technique for producing electric current using h ...
An oscillating cylinder steam engine is a variant of the simple expansion steam engine which does not require valves to direct steam into and out of the cylinder. Instead of valves, the entire cylinde ...
Main articles: History of the steam engine and Timeline of steam powerSee also: Steam power during the Industrial RevolutionSince the early 18th century, steam power has been applied to a variety of p ...
William Murdoch joined Boulton and Watt in 1777. At first he worked in the pattern shop in Soho, but soon he was erecting engines in Cornwall. He became an important part of the firm and made many con ...
