موسوعة العلمـاء و المخترعين .. العلمـاء بالترتيب حسب اسم الشهرة .. الحرف ١٢_أ

Encyclopedia of Scientists and Inventors..in order according to their nickname..the letter 12_a

◾ Ohm Georg Zemun
Ohm Georg Simon

German physicist (1787-1854).
Ohm studied in Wergen, then taught physics in Munich. After a long struggle, his work in electricity was appreciated. It is called by its name: Ohm, the unit of electrical resistance. • Also called by its name is the law that determines the relationship between the intensity of electric current, voltage and resistance. Ohm's Law: Current (amps) = voltage (volts) / resistance (ohms)
He also worked in the study of sound and crystals and won the Copley Medal.
One of the devices on which Ohm conducted his experiments (Ohm's drawing)

◾ Unbrüger (von unenbrück), Leopold
Auenbrugger (von Auenbrug) Leopold

Austrian physician (1722 - 1809)
Unbrüger grew up in the town of Graz in Austria, and his father was the owner of a small inn, and after studying medicine, he worked as a doctor in the military hospital in Vienna.
Unebrugger was the first to personify the method of tapping on the patient's chest (in the same way he used to tap the wine barrels in his father's inn) and to listen to the sound produced by those taps. He wrote about his method, but it was not appreciated twenty years later (cf. Laënnec, R.T.H).

◾ Onz, HeyKah Kamerling
Onnes, Heike Kamerlingh

Dutch physicist (1853 - 1926)
Onnes was educated in Grummingen and Heidelberg, then taught experimental physics in Leiden. Onnes founded the Low Temperature Laboratory (Cryogen) in Leiden. He was the first to liquefy hydrogen gas and helium gas. He also discovered the phenomenon of increasing the electrical conductivity as a result of the cold, which leads to the phenomenon known as “super conductivity.”
Onnes won the Nobel Prize for Physics in 1913.

◾ Euler Schlepin, Hans Carl August Simon von
Euler - Chelpin - Hans Karl August Simon von

Swedish chemist of German origin (1873 - 1964)
Euler Schleben was educated in Munich, Berlin, Götegen and Würzburg and later taught physical chemistry in Stockholm. Then he went to Berlin to study and research, and then to Paris, where he studied at the Pasteur Institute, and after that he became a professor of chemistry. Then he returned to Sweden to become the director of the “Biochemical Institute” in Stockholm.
He shared with Harden the Nobel Prize for Chemistry in 1929 for his research on enzymes and fermentation.

◾ Euler, Leonard
Euler, Leonard

Swiss mathematician (1707-1783).
Euler received his education in Basel, Switzerland, at the hands of Bernoulli. Then he worked as a professor of physics in St. Petersburg, as he worked as a professor of mathematics, and as a result of the continuous stress and bad weather, he lost one of his eyes • Euler moved to Berlin by royal order, where he spent twenty-five years before heading to Russia, where he almost lost the rest of his sight because of his glaucoma. Euler's achievements in algebraic series were a great contribution to mathematical sciences, and he was the first to point out that such sequences must be convergent in order for their use to be useful. In trigonometry, Euler introduced short formulas of functions and used some Greek letters as symbols (such as pi and sigma). Euler's name is given to some trigonometric expansions because he was the first to realize their importance. He made improvements to differential and integral arithmetic and made studies on mechanics, thermodynamics, sound and light.

◾ Owens, Arthur James
Ewins, Arthur James

British chemist (1882 - 1947)
Owens received his education in a number of British institutes, then worked as an assistant in the Wellcome laboratory for physiological research, then worked as a research chemist at May and Baker. pneumonia). Owens was elected a Fellow of the Royal Society in 1943.

Ipatiev, Vladimir Nikolayevich
Ipatiev Vladimir Nikolaevich

Russian-American chemist (1867-1952).
Ipatiev received his education in St. Petersburg, Munich, and Paris, then returned to St. Petersburg, where he continued to work until he immigrated to America at the age of sixty-four, and in America he worked in technological sciences. The chemistry of unsaturated hydrocarbons.

◾ Aytvesh, Ronald, Baron Vaughn
Eotvos Ronald, Baron von

Hungarian physicist (1848 - 1919)
Ivech learned in Budapest and Heidelberg, then worked as a professor of physics in his country's capital. He also held the position of Minister of Education. Ayvech conducted studies on the capillary property, terrestrial gravity, and geomagnetism.
He also carried out experiments in which he studied the relationship between surface tension and temperature of fluids, and made a two-armed torsion balance that bears his name: the ITVSH balance, and is used to investigate local differences in gravity in geological layers. As Ivesh explained, the eastward-moving body loses some of its weight.