موسوعة العلمـاء و المخترعين .. العلمـاء بالترتيب حسب اسم الشهرة .. الحرف ٥_د

Encyclopedia of Scientists and Inventors.. Scientists in order according to their nickname.. The letter 5_d

⏹ Descartes, Rene Descartes,

French philosopher and mathematician (1596-1650)
Descartes joined the army, as was the tradition of prominent families at the time. His interest in mathematics appeared when he solved an arithmetic issue that was published as a question addressed to all mathematicians in a challenging manner.
He wrote a book about his philosophy, but he refrained from publishing it, deterred by what happened. “Galileo wrote the book more than a decade after his death.

⏹ Desargue, Gérard

French mathematician and engineer (1593-1662)
Desargues participated in the siege of La Rochelle as an engineer, and he was lecturing on mathematics in Paris, and he is one of the founders of modern geometry. Desargues developed a theory in spirals and transverses (transversals involution, respectively). Most of Desargues' works are located in his book on cones (plural cone) entitled: Brouillon Project, which he published in 1639.

⏹ Diverno, Orbier Arman Bani
Dufrenoy, ours Pierre Armand Petit

French geologist (1792 - 1857)
He participated with Elie de Beaumont in drawing up a geological map of France in 1841. Through his work and long experience in mineral science (mineralology), he created a new classification for minerals based on crystallography.

⏹ De Vries , Hugo

Dutch botanist (1848-1935)
De Vries was educated in Leiden, Heidelberg, and Würzburg, and then taught in Amsterdam.
De Vries entered the experimental research on the study of evolution, and discovered the existence of mutations during the cultivation of «Oenothera». The results of these experiments were published in the book: Die Mutations theory.
This theory was an alternative to natural selection in biology and received great interest. De Vries conducted pioneering experiments in the property.
Osmosis (diffusion of solutions through membranes) He was one of the first to respect Mendel's work in connection with Mendel's study of heredity.

Deakin, Henry Drysdale
Dakin, Henry Drysdale

English chemist (1880 - 1952)
Dicken studied in Leeds, London, and Heidelberg, then went to the Lister Institute, and after that he worked as a scientific advisor at the Merck Institute. He also worked as a director for the Merck & Co. Farsa Dickin was chosen as a Fellow of the Royal Society, and he was chosen as a Chevalier in the Legion of Honor. ) • During World War I Deakin produced a chemical solution sometimes called. Deakin's solution - Carrel Dakin.

It contains 0.5% of sodium hypochlorite, to be used as an effective antiseptic in the treatment of infected wounds. The treatment method is called continuous irrigation with Carl-Dikken solution.
Carrel - Dakin continuous irrigation

Deakin has published a book entitled: Oxidation and Reduction in Animal Organisms, and he has another book on disinfectants entitled:
Handbook of Chemical Antiseptics

⏹ Deacon, Henry Deacon, Henry

English chemist (1822 - 1877)
Deacon was trained as an engineer, but his contact with Faraday turned him into chemistry. He got involved in the alkali trade in Lancashire and invented a method that bears his name for making chlorine by oxidizing hydrochloric acid by air with the use of cupric chloride as a catalyst.

Delambre, Jean-Baptiste Joseph
Delambre, Jean Baptist Joseph

French astronomer (1749 - 1822)
Delambre learned and trained at the hands of Lalande in 1807, and Lalande became famous from the year 1732 Delambre as a result of the calculations he made on the planet Uranus, which is the seventh of the car planets.
Delambre worked in the Bureau de Longitudes and finally worked as a professor of astronomy at the College de France. Delambre wrote three histories (history) about astronomy.
He discovered the measure of symmetry that bears his name (Delambre's analogies) in stereoscopic trigonometry.

⏹ Delépine, Marcel Delépine, Marcel

French chemist ( 1871 - )
Delpin studied chemistry in Paris
Teaching organic chemistry at the College de France
Delpin did a series of researches on rhodium and the organosulfur compounds in terpenes and pyridines.

⏹ Del Rio, Andres Manuel
Del Rio, Andrés Manuel

Spanish mineralogist (1764 - 1849) ·
Del Rio received a theological education in San Isidore, then turned to scientific study, specializing in minerals in Freiberg and chemistry in Paris. As a result of Del Rio's close relationship with the famous French chemist, Lavoisier
He had to flee from the men of the French Revolution who executed Lavoisier heading to England and then left it to Mexico where he taught metallurgy in the School of Mines. Del Rio discovered vanadium metal in the year 1801 and called it “erythornium”.
It was discovered by others, but it was later proven that Del Rio's discovery was new, and the metal discovered was called Vanadium.