Epicurus - Greek philosopher; founded the system known as Epicureanism. Oskar Bolza Born 12 May ; died 5 Jul at age But it was quickly appreciated that the energy released within a critical atomic pile, a mass of graphite absorbing the neutrons emitted by radioactive material inserted into it, could generate heat, which in turn could create steam to drive turbines and thus convert the nuclear energy into usable electricity.
The small direct-current generators of early urban power systems were abandoned in favour of alternating-current systems, which could be adapted more readily to high voltages. The strength of aluminum, compared weight for weight with steel, made it a valuable material in aircraft construction, and many other industrial and domestic uses were found for it.
Fleming published his discovery inin the British Journal of Experimental Pathology,  but little attention was paid to his article. Improvements in iron and steel Another field of industrial innovation in the 20th century was the production of new materials.
Nicolaus Copernicus Prior to Nicolaus Copernicus, the world thought the sun and the planets revolved around Earth. As the story goes, Dr. Apart from improvements in the design of the stills and the introduction of continuous-flow production, the first big advance came in with the introduction of thermal cracking.
The early plastics relied upon the large molecules in cellulose, usually derived from wood pulp.
His other alma mater, the Royal Polytechnic Institution now the University of Westminster has named one of its student halls of residence Alexander Fleming House, which is near to Old Street.
The same sort of influences can be seen even in the old established chemical processes, although not to the same extent: It also affected Neisseria gonorrhoeaewhich causes gonorrhoeaalthough this bacterium is Gram-negative.
Food and agriculture The increasing chemical understanding of drugs and microorganisms was applied with outstanding success to the study of food. The war led the Manhattan Project to produce the fission bomb that was first exploded at Alamogordo, N.
Military technology Military technology in the space age has been concerned with the radical restructuring of strategy caused by the invention of nuclear weapons and the means of delivering them by intercontinental ballistic missiles.
The use of prefabricated parts according to a predetermined system of construction became widespread. Meanwhile, the size and power of launching rockets climbed steadily, and by the late s the enormous Saturn V rocket, standing feet metres high and weighing 2, tons 2, kilograms at lift-off, made possible the U.
Penicillin was discovered in London in September of In medicine and the life sciences the computer has provided a powerful tool of research and supervision. Eleven years later, still five years before Bell's phone came outhe filed a temporary patent on his invention.
Economies of scale and the greater physical efficiency achieved as higher steam temperatures and pressures were attained both reinforced this tendency. This was essentially a development from the carbon-filament electric lightbulb.
The following list of influential figures from world history comes from Michael H. Hart's book The A Ranking of the Most Influential Persons in maxiwebagadir.com the book, Hart provides brief biographies of each of the individuals, as well as reasons for their ranking. Inventor: Sir Alexander Fleming, a scientist What he was trying to make: Ironically, Fleming was searching for a "wonder drug" that could cure diseases.
However, it wasn't until Fleming threw away. Sir Alexander Fleming is the name people think of when penicillin is brought up. There's even a charming little story that goes along with it. An exclusive interview with Andrea Rossi! Interviews / Scoops. December 30, by vessynik.
15 Comments. In these days I did a long interview with Andrea Rossi. I would like to dedicate it as a special New Year gift to all those who bought, or will buy, my book “E-Cat – The New Fire”. Sir Alexander Fleming.
Sir Alexander Fleming, a Scottish biologist, defined new horizons for modern antibiotics with his discoveries of enzyme lysozyme () and the antibiotic substance penicillin ().
The discovery of penicillin from the fungus Penicillium notatum perfected the treatment of bacterial infections such as, syphilis, gangrene and tuberculosis. History of Penicillin Originally noticed by a French medical student, Ernest Duchesne, in Penicillin was re-discovered by bacteriologist Alexander Fleming working at St.
Mary's Hospital in London inA history of the invention of penicillin by alexander fleming