موسوعة العلمـاء و المخترعين .. العلمـاء بالترتيب حسب اسم الشهرة .. الحرف ٧_ل

Encyclopedia of Scientists and Inventors.. Scientists in order according to their nickname.. The letter 7_L

⏹ Lobachevsky, Nikolai Ivanovich Lobachevski, Nikolai Ivanovich

Russian mathematician (1793 - 1856)
Lobachevsky worked as a professor of mathematics and then as director of Kazan University, where he had previously received his education. Lobachevsky became famous as a result of his annals (historical records) in mathematics. Thus, he was the founder of the first comprehensive system of non-engineering
Euclidean (previously referred to by Gauss from 1777 to 1855).
At the time when Lobachevsky was laying down his modern mathematical formula, the Hungarian mathematician Bolyai was working on similar formulas. Lobachevsky's system and Boyai's system started from the point of their disagreement about the axiom of parallels, and they were bound by the non-Euclidean hyperbolic space. Lobachevsky left the achievements Important ones:
Principles of Geometry
He worked on it from 1829-1830, and New Principles of Geometry from (1835-1838) and others. All his writings have been translated into German (see Rieman on non-Euclidean space).

⏹ Lubel, Mathias de (Lübel)
Matthias L'Obel , de ( Lobel )

Flemish naturalist (1538-1616).
Lobel was one of the first botanists to develop a classification of plants based on structures (structures). However, Lobel's reliance on the forms of plant leaves led to sometimes unreasonable results, as plants that had no close ties, fell into unrelated groups.
Lobel worked as a physician for King James VI of England, and the name Lobel is given to the Lobelia plant.

⏹ Ludwig, Karl Friedrich Wilhelm
Ludwig, Karl Friedrich Wilhelm

German physiologist
( 1895 - 1816 )
Ludwig studied medicine in Erlangen and Marburg, then became a professor of physiology in Leipzig.
Ludwig invented a mercury pump to separate gases from the blood and analyze the gases, and this led to an understanding of the role of oxygen physiology. He also studied the role of the nervous system in the circulatory system and also studied glandular secretions.

⏹ Laurent, Auguste

French chemist (1807-1853)
Laurent studied mining engineering and then worked as an assistant to his teacher, Dumas. Laurent lived most of his life in poverty and died of pulmonary tuberculosis (tuberculosis). Laurent taught in Bordeaux and then in Paris, where he partnered with Gerhardt. These two colleagues were suffering from continuous denial from their colleagues.
Because of his tight financial conditions, Laurent was forced to work as an analyst at the Mint, where he continued his research there under extreme conditions. Laurent's studies of difficulty affected Dumas's concepts of chemical equivalence of elements and substitution capabilities.
Laurent discovered anthracene and prepared phtalic acid by the oxidation of naphthalene. Laurent developed a new classification for organic substances and designed a device to measure the amount of sugar in solutions by measuring the rotation of the polarization level of the light passing through the solution. He participated with the aforementioned Gerhard in developing the nucleus theory of organic cracks (radicals). Grant his name
A fatty acid (n- Dodecyclic acid) that appears in milk, coconut oil, palm oil, etc.

⏹ Lawrence, Ernest Orlando
Lawrence, Ernest Orlando

American physicist (1901-1958)
Lawrence was educated in South Dakota and Minnesota
Chicago and Bill worked as a professor of physics at the University of California · established the first cyclotron (a device accelerating atomic particles such as protons) to produce high-energy particles to be used in the study of elemental transformations.
Lawrence was awarded the Nobel Prize as a result of his studies in the year 1939 · He also worked on the use of atomic radiation in studies of biology and medicine.
Ernest Orlando Lawrence putting the finishing touches on his 19 million volt cycltron (July 1939).